What Are As-Built Drawings and When Do You Need Them? Toronto 2026 Guide
- 416 Construction
- Aug 5
- 18 min read
As-built drawings document how a building or construction project was actually completed, including changes made after the original architectural, engineering or permit drawings were issued.
They may show the final location, dimensions and configuration of:
Walls and rooms
Structural beams and columns
Foundations and footings
Doors and windows
Plumbing lines
Electrical systems
HVAC equipment and ductwork
Fire-safety systems
Underground services
Site grading
Building setbacks
Other concealed construction
As-built drawings are particularly valuable when the completed construction differs from the original design.
However, the term is frequently misunderstood.
An as-built drawing is not automatically the same as:
A permit drawing
A revised permit drawing
A record drawing
A measured drawing
An as-built survey
A shop drawing
An engineer’s field-review report
These documents serve different purposes and may be prepared by different professionals.
For a Toronto homeowner, the most important point is this:
As-built drawings can provide a valuable record of completed work, but they do not automatically legalize construction that differs from the approved permit.
When construction changes affect zoning, structure, fire safety, plumbing, HVAC, occupancy or other regulated matters, revised permit drawings may need to be submitted to Toronto Building and approved before the work can pass inspection.
This guide explains what as-built drawings are, what they should include, who prepares them and when they may be required for a Toronto construction project.
What Are As-Built Drawings?
As-built drawings are updated versions of the original construction documents that record significant changes made while the project was being built.
The Ontario Association of Architects and Ontario General Contractors Association describe as-built drawings as documents prepared by the contractor during construction to record the actual locations of building components and changes from the original contract documents. The contractor typically turns them over to the architect or client at project completion. (Ontario Association of Architects)
Construction rarely proceeds exactly as initially drawn.
Changes may occur because of:
Previously concealed conditions
Differences between old drawings and the existing building
Structural conditions discovered during demolition
Mechanical or plumbing conflicts
Material substitutions
Owner-requested revisions
Building-inspector comments
Engineering instructions
Site conditions
Coordination between trades
Unavailable products
Changes to equipment
Revised construction methods
For example, an approved basement-renovation drawing may show a plumbing stack in one location. After demolition, the contractor may discover that the actual stack is several feet away.
The finished plumbing layout may therefore differ from the original drawing.
The as-built documents should record that final location so future owners, designers and contractors know where the plumbing was installed.
Why Are As-Built Drawings Important?
Buildings contain many components that become difficult or impossible to see after construction is complete.
Once drywall, ceilings, flooring, concrete and landscaping have been installed, the exact location of concealed work may no longer be obvious.
Accurate as-built information can help future teams locate:
Underground plumbing
Drainage pipes
Electrical conduits
Shut-off valves
Cleanouts
Structural reinforcement
Steel beams
Mechanical equipment
Fire dampers
Sprinkler piping
Control wiring
Data cabling
In-floor heating lines
Foundation waterproofing
Below-grade services
Professional Engineers Ontario notes that the best time to collect information for as-built or record documents is during construction. Once the work has been covered or incorporated into an assembly, accurately verifying it can become difficult or impossible. (Professional Engineers Ontario)
This makes as-built documentation valuable for:
Building maintenance
Future renovations
Emergency repairs
Equipment replacement
Commercial leasing
Property management
Insurance claims
Construction dispute resolution
Building-permit revisions
Facility-management planning
Future additions
Sale or refinancing due diligence
As-Built Drawings vs. Record Drawings
The terms as-built drawings and record drawings are often used interchangeably, but Ontario industry guidance distinguishes between them.
As-built drawings
As-built drawings are generally prepared from information recorded by the contractor and trades during construction.
They may begin as a clean set of construction drawings that is marked up on site to show:
Changes from the original design
Actual equipment locations
Revised dimensions
Hidden services
Field instructions
Construction deviations
Relocated components
Record drawings
Record drawings are generally prepared by the architect, engineer or other design professional when that service is included in their contract.
They may combine:
Original design drawings
Addenda
Change orders
Site instructions
Known field changes
Contractor-provided as-built markups
Information observed during professional field reviews
The OAA and OGCA describe record drawings as drawings prepared by the architect, usually incorporating the original drawings, changes known to the architect and information from the contractor’s as-built documents. (Ontario Association of Architects)
Professional Engineers Ontario applies an important additional distinction. PEO explains that engineering record documents are based on information observed by the engineer or someone under the engineer’s supervision. By contrast, engineering as-built documents may incorporate information supplied by another party, such as contractor red-line markups. PEO states that as-built documents based on such information should not be sealed as verified engineering record documents. (Professional Engineers Ontario)
Why the terminology matters
The phrase printed on the drawing can affect what the user assumes about its accuracy.
A contractor’s as-built markup may show the best available information collected during construction. It does not necessarily mean that an architect or engineer independently measured and verified every concealed component.
A professionally prepared record drawing may involve a higher level of review, but its exact reliability still depends on:
The professional’s scope of services
The frequency of site reviews
Which components remained visible
Information supplied by the contractor
The required degree of accuracy
Limitations stated on the drawings
The required document and level of verification should therefore be defined in the construction contract before the project begins.
As-Built Drawings vs. Measured Drawings
Measured drawings document the existing condition of a building or space based on measurements taken during a site visit.
They are commonly prepared before a renovation when reliable original drawings are unavailable.
Measured drawings may show:
Existing room dimensions
Wall locations
Door and window locations
Ceiling heights
Stair dimensions
Plumbing-fixture locations
Structural elements that are visible
Existing exterior conditions
The OAA and OGCA distinguish measured drawings from as-built drawings. Measured drawings are prepared from on-site measurements of an existing building or space, while as-built drawings are developed during construction to track how a particular project was completed. (Ontario Association of Architects)
Example
A homeowner buys a 100-year-old Toronto house with no reliable drawings.
An architectural designer measures the property and prepares existing-condition floor plans.
Those are measured drawings.
The homeowner then completes a major renovation. During construction, the contractor records changes to the structural framing, plumbing and HVAC layout.
Those are as-built markups.
After construction, the architect updates the digital drawing set using known changes and contractor information.
Those may be delivered as record drawings, depending on the architect’s contract and the terminology being used.
As-Built Drawings vs. Revised Permit Drawings
This is the most important distinction for homeowners completing permitted construction.
As-built drawings record what was constructed
They document the final condition of the project.
Revised permit drawings request approval for a change
They are submitted to the municipality when regulated construction will differ from the drawings on which the building permit was issued.
A contractor should not construct an unapproved structural or life-safety change and assume that preparing an as-built drawing afterward will make the work acceptable.
Ontario’s building-permit guidance states that when completed work differs from the approved plans and permission for the revision was not obtained, the owner may be directed to correct the work. (Ontario)
Toronto Building accepts additional and revised drawings through its online File Submission Hub. Revised documents addressing examiner deficiencies must clearly identify the changes. (City of Toronto)
When Do Construction Changes Require Permit Revisions?
Not every minor field adjustment requires a formal permit revision.
However, the project team should consult the designer, engineer and building inspector before proceeding when a proposed change affects regulated construction.
Changes that may require revised permit drawings include:
Moving or removing a load-bearing wall
Changing a beam, column or footing
Changing foundation dimensions
Altering an underpinning sequence
Moving a basement entrance
Changing the building footprint
Increasing building height
Changing exterior setbacks
Relocating stairs
Changing stair dimensions or headroom
Changing guards or handrails
Enlarging exterior openings
Adding or removing windows
Changing fire separations
Relocating an exit
Changing the number of dwelling units
Changing a building’s use
Changing plumbing layouts
Adding bathrooms or kitchens
Changing HVAC systems
Relocating mechanical rooms
Changing insulation assemblies
Changing exterior cladding where spatial-separation requirements apply
Modifying sprinkler, fire-alarm or life-safety systems
Changes can affect several disciplines at once.
Moving a staircase, for example, may affect:
Floor framing
Structural beams
Headroom
Guards
egress
Fire separations
Plumbing
HVAC ductwork
The floor plan of more than one storey
A permit revision should therefore be reviewed as part of the complete building design—not as an isolated sketch.
Are As-Built Drawings Required for Every Toronto Renovation?
No.
Toronto does not universally require a complete set of as-built architectural, structural, mechanical and electrical drawings at the end of every residential renovation.
For a typical house renovation, the City’s focus is generally on:
Construction complying with the issued permit
Approved permit drawings being available on site
Required inspections being requested
Regulated components remaining visible until inspected
Approved revisions being obtained where necessary
Final inspections being completed
Toronto requires the permit information, approved drawings and specifications to be available on site for inspections. The City also warns that construction elements covered before inspection may have to be uncovered. (City of Toronto)
As-built drawings may nevertheless be required when:
The construction contract requires them
The owner requests them
The City or inspector requests specific documentation
The project involves residential infill surveying
An engineer requires verified information
Site-plan conditions require them
Municipal infrastructure is involved
A landlord or commercial tenant requires them
A condominium turnover requires record documentation
A lender, insurer or facility manager requires them
Construction differs materially from the approved drawings
The project involves complex mechanical or life-safety systems
The exact closeout requirements should be confirmed before construction begins.
When Do You Need As-Built Drawings?
1. When the Construction Contract Requires Them
As-built drawings are commonly listed as a project-closeout deliverable.
The contract or specifications may require the contractor to provide:
Marked-up architectural drawings
Structural changes
Mechanical as-built drawings
Electrical as-built drawings
Plumbing layouts
Underground-service plans
Equipment schedules
Control diagrams
Shop drawings
Testing and commissioning records
Operation and maintenance manuals
The required format should also be identified.
Possible formats include:
Marked-up paper drawings
Scanned PDF drawings
Clean digital PDFs
AutoCAD files
Revit or building-information-model files
Georeferenced survey files
Ontario industry guidance recommends establishing the required as-built and record-drawing format before tendering or contracting rather than waiting until project completion. (Ontario Association of Architects)
2. When the Completed Work Differs From the Original Design
Changes during construction should be documented, even when they do not require a formal municipal revision.
Examples include:
A plumbing cleanout moved to an accessible location
Ductwork rerouted around an existing beam
Electrical panels relocated within the approved room
Equipment models changed
Floor drains relocated
Shut-off valves moved
In-floor heating zones revised
Underground service routes adjusted
Non-load-bearing partitions shifted slightly
Recording these changes creates a more useful building file.
Where a change affects permit compliance, the required permit revision should be obtained rather than simply recording the change at the end.
3. When Constructing a New Infill House in Toronto
A construction as-built survey may be required for a new Toronto house.
This is different from a complete set of building as-built drawings.
Toronto’s residential infill guidance states that an as-built survey for a new building should show:
Required setbacks
The constructed building location
The first-floor elevation
The information allows the building inspector to verify matters such as setbacks and building-height reference elevations early enough for corrections to be made before construction advances too far. (City of Toronto)
An as-built survey is generally prepared by an Ontario Land Surveyor, not by the general contractor.
It may confirm:
Front-yard setback
Rear-yard setback
Side-yard setbacks
Foundation location
First-floor elevation
Below-grade garage elevation
Relationship to property boundaries
A survey verifying the foundation location does not replace architectural, structural or mechanical as-built drawings.
4. When Finalizing Site Grading for a New House
Toronto’s infill-housing grading process requires the owner to retain a qualified grading consultant to:
Prepare the site-grading plan
Conduct field review
Confirm compliance
Provide a final Lot Grading Certificate after the grades are completed
The final grading certification is a separate closeout document from the general contractor’s as-built drawings. (City of Toronto)
It may be necessary for confirming that the constructed grading:
Directs water appropriately
Does not create new ponding
Does not negatively affect neighbouring properties
Follows the approved grading plan
5. When Completing a Commercial Renovation
As-built drawings are particularly valuable for commercial projects because building systems are often more complicated than those in a house.
A commercial as-built package may include:
Architectural layouts
Reflected ceiling plans
Door schedules
Fire-separation layouts
Exit routes
Sprinkler systems
Fire alarms
Emergency lighting
Electrical panels
Data and communication systems
HVAC equipment
Plumbing
Equipment connections
Accessibility features
Commercial landlords may require this information before returning a construction deposit or approving project closeout.
The documents can also help future tenants understand what infrastructure is already available.
6. When Completing a Restaurant, Medical or Dental Office
Specialized commercial spaces contain systems that future owners and maintenance contractors may need to locate quickly.
For a restaurant, the as-built information may show:
Kitchen-exhaust ducts
Makeup-air equipment
Grease-interceptor locations
Gas lines
Floor drains
Fire-suppression systems
Refrigeration lines
Electrical circuits
Plumbing connections
For a medical or dental office, it may show:
Medical-gas piping
Vacuum lines
Compressed-air systems
Specialized electrical systems
Radiation-protection assemblies
Plumbing
Equipment locations
Data infrastructure
Without accurate documentation, future maintenance may require destructive investigation.
7. When Constructing a Duplex, Triplex or Multiplex
A Toronto rental conversion may involve:
Fire separations
Fire-rated doors
Smoke alarms
Carbon-monoxide alarms
Plumbing stacks
Separate electrical panels
HVAC systems
Fire stopping
Egress windows
Shared and private service areas
As-built documentation can help the owner maintain these systems and support future repairs.
However, as-built drawings should not be confused with municipal approval.
A multiplex conversion still requires the applicable permits, inspections and approved revisions. A drawing prepared after construction does not prove that concealed fire stopping, insulation or structural connections were installed correctly unless those conditions were properly observed and documented.
8. When Structural Framing Changes During Construction
Structural conditions frequently change after demolition reveals the building’s actual construction.
Possible discoveries include:
Joists running in an unexpected direction
Deteriorated framing
Missing lintels
Unusual foundation conditions
Concealed steel
Previous unpermitted modifications
Inadequate bearing
Undocumented posts
Different roof framing
The engineer may issue:
A site instruction
A sketch
A supplemental detail
A field-review report
Revised structural drawings
The final project file should incorporate the approved structural solution.
Where Toronto Building requests revised or as-built structural information, the drawings should be prepared and reviewed by the appropriate qualified professional.
9. When Installing Underground or Concealed Services
This is one of the strongest reasons to maintain as-built documentation.
The contractor should record components before they are covered, including:
Under-slab plumbing
Foundation drainage
Electrical conduits
Water-service lines
Sanitary lines
Storm lines
Sump-discharge piping
Irrigation lines
Gas services
In-floor heating
Waterproofing transitions
Reinforcing steel
Embedded plates
Sleeves through foundations
Useful documentation may include:
Dimensioned drawings
Measurements from fixed reference points
Photographs
Videos
Survey coordinates
Depths
Pipe sizes
Material specifications
Installation dates
A photograph showing a pipe is helpful. A photograph accompanied by dimensions and a clear drawing is much more useful.
10. When Planning a Future Renovation or Addition
Future designers can use reliable record information to make better preliminary decisions.
As-built or record drawings may help determine:
Where structural walls are located
Which areas contain plumbing
Where mechanical equipment is installed
Whether a proposed opening conflicts with a beam
How existing additions were constructed
Where underground services enter the building
Which walls contain fire separations
Whether a proposed addition conflicts with site services
The drawings do not eliminate the need for site verification.
Buildings change over time, and some information may never have been recorded. The designer should still confirm critical dimensions and visible conditions before relying on an older record set.
11. When Legalizing Previously Completed Construction
Homeowners sometimes request “as-built drawings” when they discover that previous renovations were completed without permits.
Technically, the first drawings required are often better described as:
Existing-condition drawings
Measured drawings
Permit drawings for existing construction
Legalization drawings
A designer measures the building and documents the work that currently exists.
The City may then require:
Architectural drawings
Structural engineering
HVAC information
Plumbing information
Energy-efficiency information
Investigation of concealed construction
Opening finished walls or ceilings
Professional reports
Corrective work
Required inspections
The drawings do not prove that concealed construction complies with the Building Code.
The City may require portions of the work to be uncovered so that the inspector or engineer can evaluate them.
12. When Closing an Old Building Permit
An open permit can become an issue during:
A property sale
Refinancing
Insurance underwriting
A future permit application
Property due diligence
Toronto states that the current registered property owner is responsible for outstanding building permits, including permits initiated by a previous owner. (City of Toronto)
Closing an old permit may require:
Reviewing the approved permit drawings
Comparing the drawings with existing conditions
Requesting inspections
Preparing revised or existing-condition drawings
Obtaining engineering review
Correcting deficient construction
Paying outstanding fees
Completing final inspection
As-built drawings may form part of this process, but the required solution depends on the permit’s history and the work that remains visible.
13. When the Owner Needs Better Facility-Management Records
Commercial, institutional and multi-residential owners should maintain an organized building record containing:
As-built and record drawings
Permit drawings
Engineer and architect reports
Equipment manuals
Warranty information
Testing reports
Commissioning documents
Inspection certificates
Fire-safety documentation
Service records
These documents reduce the time required to investigate future repairs and renovations.
They also help property managers transfer knowledge when staff, contractors or building operators change.
What Should As-Built Drawings Include?
The required content depends on the project.
Architectural As-Built Drawings
Architectural drawings may show:
Final room layouts
Wall locations
Doors and windows
Ceiling heights
Stairs
Guards and handrails
Millwork
Floor finishes
Reflected ceiling plans
Washroom layouts
Accessibility features
Fire separations
Building sections
Exterior elevations
Structural As-Built Information
Structural documents may show:
Foundations
Footings
Underpinning
Columns
Beams
Floor framing
Roof framing
Lintels
Connections
Reinforcement
Structural openings
Retaining walls
Shoring systems
Structural record documents require careful professional consideration because many elements become concealed.
PEO advises that the inspection scope, required accuracy and intended use should be defined with the owner. Record documents should be based on information observed by the practitioner or someone under the practitioner’s supervision. (Professional Engineers Ontario)
Mechanical As-Built Drawings
Mechanical drawings may show:
Furnaces
Boilers
Heat pumps
Air-conditioning equipment
Ductwork
Exhaust systems
Makeup-air units
Hydronic piping
Controls
Fire dampers
Equipment schedules
Access panels
Plumbing As-Built Drawings
Plumbing information may include:
Sanitary drainage
Storm drainage
Water lines
Plumbing stacks
Cleanouts
Floor drains
Backwater valves
Sump pumps
Sewage ejectors
Grease interceptors
Shut-off valves
Plumbing risers
Electrical As-Built Drawings
Electrical drawings may show:
Electrical panels
Circuits
Conduits
Transformers
Disconnects
Emergency lighting
Fire-alarm devices
Data systems
Security systems
Exterior lighting
Generator connections
Electric-vehicle chargers
Civil and Site As-Built Drawings
Site drawings may show:
Building location
Property setbacks
Finished grading
Catch basins
Manholes
Sanitary services
Storm services
Water services
Fire-hydrant connections
Driveways
Retaining walls
Landscaping infrastructure
Underground utility routes
Who Prepares As-Built Drawings?
The answer depends on the document being requested.
Document | Typical preparer |
Contractor’s as-built markups | General contractor and subcontractors |
Architectural record drawings | Architect or qualified designer, when contracted |
Engineering record documents | Professional engineer with appropriate review and verification |
Measured existing-condition drawings | Architect, BCIN designer or measurement professional |
As-built property survey | Ontario Land Surveyor |
Mechanical as-built drawings | Mechanical contractor or consultant |
Electrical as-built drawings | Electrical contractor or consultant |
Civil as-built drawings | Civil engineer and surveyor |
Fire-protection as-built drawings | Fire-protection contractor or engineer |
Responsibility should be assigned in writing.
A general requirement stating only “provide as-builts” can create disputes because it does not explain:
Which disciplines are included
Required accuracy
Who must verify the information
Whether professional drawings are required
Which file format must be supplied
Whether concealed work must be surveyed
Whether the documents must be suitable for future design
Whether a building-information model is required
How Are As-Built Drawings Prepared?
Step 1: Establish the Requirements Before Construction
The owner, contractor and consultants should agree on:
Required drawings
Required detail
Required accuracy
Responsible parties
File formats
Submission deadlines
Professional-review requirements
Photography requirements
Survey requirements
Step 2: Begin With the Issued Construction Drawings
A clean set of issued-for-construction drawings should be designated as the field as-built set.
This prevents workers from recording changes on several inconsistent versions.
Step 3: Record Changes as They Occur
The site team should record changes immediately rather than attempting to remember them at project completion.
Each change should identify:
Date
Location
Drawing reference
Revised dimension
Reason for the change
Related change order or site instruction
Responsible trade
Supporting photograph
Step 4: Document Concealed Conditions Before Covering Them
Measure and photograph:
Underground services
In-wall plumbing
Electrical conduits
Reinforcement
Structural connections
Fire stopping
Waterproofing
In-floor heating
Mechanical dampers
Toronto requires inspectors to be able to see the complete building element being inspected. Elements covered before passing inspection may need to be uncovered. (City of Toronto)
Step 5: Coordinate the Trade Drawings
The architectural, structural, mechanical, electrical and plumbing information should be compared for conflicts.
For example:
Ductwork should not pass through a structural beam unless an approved opening exists.
Plumbing stacks should match the architectural bathroom locations.
Fire dampers should correspond with rated separations.
Electrical panels should have the required working clearances.
Ceiling plans should coordinate with mechanical equipment.
Step 6: Transfer the Markups Into the Final Format
Depending on the contract, the final deliverable may be:
Scanned contractor markups
Updated PDF drawings
Revised CAD drawings
Record drawings prepared by the consultant
A coordinated digital model
The final file should identify its status clearly.
Step 7: Add Limitations and Source Information
The drawing should explain:
Who prepared it
What information was used
Whether concealed conditions were verified
Whether contractor information was relied upon
The intended use
The date of the recorded conditions
Any known limitations
This prevents future users from assuming a level of precision that the project team did not provide.
Common As-Built Drawing Mistakes
Waiting Until the End of Construction
Attempting to recreate six months of changes at project closeout usually produces incomplete information.
As-built documentation should be maintained throughout construction.
Recording Only Major Architectural Changes
Hidden plumbing, electrical and mechanical changes may be more valuable to the owner than minor visible layout adjustments.
Failing to Include Dimensions
A mark showing that a drain “moved” is not useful unless the revised location can be identified.
Use dimensions from fixed building elements.
Relying Only on Photographs
Photographs are valuable but may become difficult to interpret later.
Combine photographs with:
Drawing references
Dates
Locations
Dimensions
Written descriptions
Confusing As-Built Drawings With Approval
A drawing of completed unapproved work does not constitute municipal acceptance.
Regulated changes may still require:
Revised permit drawings
Engineering
Inspections
Corrective construction
City approval
Allowing Multiple Inconsistent Drawing Sets
One controlled drawing set should be maintained.
Every revision should include a date and clear description.
Covering Work Before It Is Recorded or Inspected
Once concrete or drywall is installed, verification becomes much more difficult.
Document and inspect concealed work at the appropriate stage.
Failing to Define the Required Accuracy
A schematic equipment location and a survey-grade underground-service location are not equivalent.
The intended future use determines the required precision.
Are As-Built Drawings Stamped or Sealed?
Not automatically.
The use of a professional seal depends on:
The profession involved
Who prepared the document
The information relied upon
The degree of field verification
The intended use
The professional’s regulatory obligations
PEO distinguishes contractor-supplied as-built information from engineering record
documents that have been reviewed and verified by a professional engineer. PEO states that as-built documents based on information gathered by others should not be sealed as though they were verified record documents. (Professional Engineers Ontario)
The presence of a seal should never be interpreted as a blanket guarantee that every concealed condition was independently verified.
The drawing notes and professional’s stated scope remain important.
Can As-Built Drawings Be Used for a New Building Permit?
They may provide useful background information, but they should not automatically be reused as permit drawings.
A new permit application normally requires drawings that:
Describe the proposed work
Meet current submission standards
Address the applicable Building Code
Include required designer information
Are signed and dated
Include professional seals where required
Coordinate with current zoning and applicable law
Toronto requires permit drawings to be fully dimensioned, drawn to scale, signed and dated, with the appropriate designer identification. (City of Toronto)
An old record drawing may need to be:
Field verified
Updated
Redrawn
Supplemented with structural information
Coordinated with a current survey
Revised for current conditions
How Much Do As-Built Drawings Cost in Toronto?
There is no standard price because the required service can range from basic contractor markups to a professionally coordinated set of architectural, structural and mechanical record documents.
Cost factors include:
Building size
Number of floors
Complexity
Number of disciplines
Availability of original drawings
Quality of field markups
Amount of site measurement required
Whether concealed systems were documented
Required accuracy
CAD or Revit requirements
Engineering involvement
Surveying
Number of revisions
Whether the building must be investigated after completion
Preparing the drawings during construction is generally more efficient than attempting to reconstruct the information after all components have been concealed.
The scope and fee should be established before construction begins.
Frequently Asked Questions
What is the meaning of as-built drawings?
As-built drawings document the final constructed condition of a project, including known changes from the original construction documents.
Are as-built drawings the same as permit drawings?
No. Permit drawings show the construction approved by the municipality. As-built drawings record how the project was actually completed.
Do as-built drawings legalize unpermitted work?
No. Existing work may still require a permit, professional review, inspections and corrective construction.
Are as-built drawings required for every Toronto house renovation?
What is an as-built survey?
An as-built survey is prepared by an Ontario Land Surveyor to confirm constructed site information such as building location, setbacks and elevations. It is different from a full set of architectural and engineering as-built drawings.
Does Toronto require an as-built survey for a new house?
Toronto’s residential infill guidance requires as-built survey information early in new-house construction to verify matters such as setbacks and first-floor elevation. (City of Toronto)
Who is responsible for preparing as-built drawings?
The contractor typically maintains field as-built markups. Architects, engineers, surveyors and other consultants may prepare separate record documents when included in their contracts.
Should the contractor record concealed services?
Yes. Concealed components are among the most valuable items to document because they become difficult to locate after construction.
What are red-line drawings?
Red-line drawings are field copies marked to identify changes from the issued construction documents. They are frequently used as the source for final as-built or record drawings.
Are shop drawings the same as as-built drawings?
No. Shop drawings explain how a specific product, system or assembly is proposed to be fabricated or installed. As-built drawings record the final installation.
Do I need as-built drawings to sell my house?
They are not a universal requirement for every Toronto property sale, but they may assist with due diligence, open permits, renovations, lender questions or buyer concerns.
Can as-built drawings close an open permit?
They may be part of the solution, but the City may also require inspections, revised permit drawings, engineering reports or corrective work.
What happens if the construction does not match the approved permit drawings?
The inspector may request approved revisions or require the work to be corrected. The issue should be addressed before the work is concealed or the permit reaches final inspection. (Ontario)
Should as-built drawings be included in a construction contract?
For custom homes, additions, commercial renovations and complex projects, the required closeout documentation should be clearly defined in the contract.
Maintain Accurate Construction Records With One Design-Build Team
As-built documentation is most effective when it is treated as part of the construction process—not as paperwork completed after everyone has left the site.
Architectural design, engineering, permitting and construction changes should remain coordinated from the beginning of the project through final inspection.
416 Construction provides integrated design-build services throughout Toronto and the Greater Toronto Area, including:
Existing-condition measurements
Architectural drawings
Structural engineering
Mechanical and HVAC design
Building-permit applications
Permit revisions
Responses to City comments
Contractor as-built documentation
Record-drawing coordination
Residential infill construction
Commercial renovations
Multiplex conversions
Final inspection and permit-closeout coordination
Whether you are planning a custom home, major renovation, rental conversion or commercial fit-out, maintaining an accurate construction record can prevent expensive investigation and uncertainty in the future.
Contact 416 Construction to discuss your architectural, permitting or full design-build project.
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