What Is an Infill House in Real Estate? A Toronto Custom Home Builder Explains

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What Is an Infill House?

An infill house is a new home built within an existing, established neighbourhood rather than in a newly developed subdivision.

The property may be:

• A vacant lot between existing homes

• A severed portion of a larger property

• An underused parcel of land

• A lot where an older house was demolished

• A site being redeveloped with a larger or more efficient home

• A property being converted into multiple residential units

CMHC describes infill development as residential development occurring in an established neighbourhood where infrastructure is already in place, instead of on undeveloped greenfield land. (Canada Mortgage and Housing Corporation)

In Toronto, the most common example is an older bungalow or two-storey home being demolished and replaced with a new custom home designed for the existing lot.

Quick Answer

An infill house is a newly constructed home placed within an already developed neighbourhood.

Unlike a subdivision home, an infill house is designed around an existing lot, neighbouring properties, mature trees, established streets, municipal services and local zoning restrictions.

Infill House Questions and Answers:

What Is the Difference Between an Infill House and a Custom Home?

An infill house describes where and how the home is developed. A custom home describes how the home is designed and built for its owner.

A house can therefore be both:

• An infill house because it is built in an established neighbourhood

• A custom home because it is designed specifically for the property and homeowner

Many Toronto custom homes are infill houses because they replace older homes in established neighbourhoods such as Etobicoke, North York, High Park, Leaside, The Beaches, Forest Hill and Scarborough.

What Is the Difference Between an Infill Home and a Subdivision Home?

A subdivision home is generally constructed as part of a larger development where many homes, roads and municipal services are built at approximately the same time.

An infill house is constructed individually within an existing community.

An infill project must work around conditions that are already present, including:

• Adjacent homes

• Existing driveways

• Mature trees

• Municipal sidewalks

• Overhead wires

• Narrow access routes

• Existing water and sewer connections

• Neighbourhood zoning

• Established grading and drainage patterns

For this reason, infill construction can require more detailed planning and site coordination than building on an open subdivision lot.

Why Are Infill Houses Common in Toronto?

Toronto has many established neighbourhoods where the land is highly valuable but the existing homes may be small, outdated or poorly suited to modern lifestyles.

Rather than moving to a new subdivision, a homeowner or developer may purchase an older property and replace it with a home that offers:

• More living space

• Modern mechanical systems

• Improved insulation

• Better energy efficiency

• Open-concept layouts

• Larger kitchens

• Additional bathrooms

• Finished basements

• Home offices

• Modern electrical systems

• Custom luxury finishes

Infill construction allows homeowners to build a modern home while remaining close to existing schools, transit, parks, shopping and employment areas.

Does an Infill House Always Require Demolition?

No.

Some infill homes are built on vacant properties or on newly severed lots. However, many Toronto infill projects involve demolishing an existing house and constructing a replacement home.

Other forms of residential infill can include:

• Semi-detached homes

• Duplexes, triplexes and fourplexes

• Laneway suites

• Garden suites

• Small apartment buildings

• Additions creating more residential space

• Conversions of existing buildings

The appropriate development strategy depends on the property’s zoning, lot dimensions, municipal servicing and the owner’s goals.

Do You Need a Building Permit for an Infill House in Toronto?

Yes. A new infill house requires a building permit before construction can begin.

Toronto Building reviews permit applications for compliance with the Ontario Building Code, municipal zoning requirements and other applicable laws. (City of Toronto)

A complete permit package may include:

• Current property survey

• Site plan

• Existing and proposed grading information

• Architectural floor plans

• Exterior elevations

• Building sections

• Structural drawings

• Foundation plans

• Roof and framing plans

• HVAC design and calculations

• Plumbing information

• Energy-efficiency documentation

• Tree declarations

• Designer information forms

• Municipal road-damage documentation

Additional approvals may be required depending on the property and proposed design.

What Is an Infill Public Notice?

Toronto requires a Residential Infill Public Notice for certain demolition, new-house and large-addition projects.

The notice is intended to inform neighbours about the project and provide access to information concerning the construction site.

A notice is required for permits involving:

• A new detached or semi-detached house on a vacant lot

• Demolition of an existing house followed by construction of a replacement house

• Demolition of a house without an immediate replacement

• Additions with a combined proposed floor area of at least 100 square metres

The City requires the notice to be displayed at the construction property in accordance with its infill-construction rules. (City of Toronto)

Does an Infill House Need Committee of Adjustment Approval?

Not always.

An infill home can proceed directly to a building-permit application when the design complies with the applicable zoning requirements.

Committee of Adjustment approval may be required when the proposed home needs relief from zoning standards involving:

• Building height

• Building depth

• Front-yard setback

• Rear-yard setback

• Side-yard setbacks

• Lot coverage

• Gross floor area

• Landscaping

• Parking

• Driveway width

• Platforms, decks or balconies

A preliminary zoning review should be completed before the design and construction budget are finalized.

The objective is to identify potential variances early, rather than discovering zoning issues after the complete drawings have been prepared.

Are Infill Houses More Expensive to Build?

They can be.

The cost of an infill house depends on the size, design, structural system, excavation, access conditions, municipal requirements and finish level.

Infill construction may involve additional expenses for:

• Demolition

• Disposal and environmental testing

• Temporary fencing

• Tree protection

• Limited equipment access

• Neighbour protection

• Excavation shoring

• Underpinning

• Service disconnections

• New water or sewer connections

• Utility relocation

• Road-damage deposits

• Committee of Adjustment applications

• Professional surveys

• Grading and drainage work

• Premium architectural finishes

The cost per square foot alone does not provide a complete picture. Two homes of the same size can have significantly different construction costs because of the property conditions and design complexity.

Are Infill Houses Good Investments?

A properly planned infill house can be an attractive real-estate investment because it combines a newer home with an established location.

Potential advantages include:

• Access to established schools and amenities

• Modern construction and mechanical systems

• Improved energy performance

• Better use of valuable urban land

• Greater living space

• Strong buyer appeal

• Custom layouts and finishes

• Reduced immediate renovation requirements

However, profitability is not guaranteed. The investor must account for the purchase price, demolition, design, approvals, financing, construction, carrying costs, taxes and expected resale value.

A realistic feasibility review should be completed before purchasing a property specifically for infill development.

What Are the Risks of Buying an Infill House?

The quality of an infill home depends heavily on the builder, consultants, inspections and construction details.

Before buying an infill house, purchasers should investigate:

• Whether building permits were obtained

• Whether required inspections were completed

• Whether the home received final occupancy approval

• Whether approved drawings match the completed home

• Grading and drainage around the foundation

• Basement waterproofing

• Window and roof flashing

• Structural framing

• HVAC sizing and balancing

• Electrical and plumbing installations

• Insulation and air sealing

• Tarion warranty coverage, when applicable

• Builder licensing and registration requirements

• Outstanding permit or zoning issues

A new-looking home is not automatically a properly constructed home. Many of the most important components are hidden behind drywall, flooring and exterior finishes.

How Can You Tell Whether an Infill House Is Well Built?

Look beyond the countertops and flooring.

A properly constructed infill home should demonstrate quality in its structure, building envelope, mechanical systems and finishing details.

Important indicators include:

• Detailed architectural and engineering drawings

• Proper municipal permits

• Completed building inspections

• Effective site drainage

• Properly installed waterproofing

• Quality windows and exterior doors

• Correctly sized HVAC equipment

• Balanced air distribution

• Well-planned electrical systems

• Consistent interior finishes

• Clear construction documentation

• A reputable and accountable builder

Buyers should consider obtaining a professional home inspection even when purchasing a newly constructed home.

What Is the Infill Home Construction Process?

1. Property and feasibility review

The builder and design team review the survey, zoning, lot dimensions, access, trees, services and existing conditions.

2. Preliminary architectural design

Floor plans and exterior concepts are prepared based on the homeowner’s needs and the limitations of the property.

3. Zoning review

The proposal is compared with applicable height, setback, coverage, depth and gross-floor-area requirements.

4. Committee of Adjustment, if required

A minor-variance application is prepared when the design does not fully comply with zoning.

5. Permit and engineering drawings

Architectural, structural, HVAC and supporting permit documents are completed.

6. Building-permit review

The application is submitted to the municipality and comments are addressed until the permit is issued.

7. Demolition and site preparation

The existing structure is safely demolished, services are addressed and the site is prepared for construction.

8. Foundation and structural construction

Excavation, footings, foundation walls, waterproofing, framing and roofing are completed.

9. Mechanical and interior work

Plumbing, HVAC, electrical, insulation, drywall, millwork, tile and interior finishes are installed.

10. Inspections and occupancy

Required inspections are completed throughout construction before final occupancy and project completion.

How Long Does It Take to Build an Infill House in Toronto?

A complete infill custom-home project can take approximately 12 to 24 months or longer from initial design through completion.

A preliminary timeline may include:

• Design and feasibility: one to three months

• Engineering and permit drawings: one to three months

• Committee of Adjustment, when required: several additional months

• Building-permit review: timing varies by application and complexity

• Demolition and site preparation: several weeks

• Construction: approximately eight to fourteen months

Timelines can be affected by municipal comments, variances, tree permits, utility work, weather, material selections and changes requested during construction.

Why Hire a Design-Build Company for an Infill Home?

Infill construction requires coordination between numerous professionals and trades.

A complete team may include:

• Architectural designer

• Structural engineer

• Mechanical designer

• Surveyor

• Arborist

• Planning consultant

• Excavation contractor

• Framing contractor

• Electrician

• Plumber

• HVAC contractor

• Interior designer

• Municipal inspectors

• Construction manager

Hiring a design-build company brings these components under one coordinated project plan.

This can help reduce design conflicts, permit delays, incomplete scopes and unexpected construction changes.

Build Your Toronto Infill Home with 416 Construction

416 Construction provides complete design-build services for infill homes, custom homes and major residential projects throughout Toronto and the GTA.

Our services can include:

• Property feasibility assessments

• Existing-condition reviews

• Custom architectural design

• Zoning analysis

• Committee of Adjustment coordination

• Structural engineering

• HVAC and mechanical design

• Building-permit preparation

• Demolition

• Excavation and foundations

• Complete custom-home construction

• Interior design coordination

• Luxury kitchens and bathrooms

• Custom stairs and millwork

• Inspection and occupancy coordination

As a leading Toronto custom home builder, 416 Construction understands that successful infill development begins long before excavation.

The property, zoning, architectural design, engineering, budget and construction plan must work together from the beginning.

Planning an Infill House in Toronto?

Before purchasing a redevelopment property or demolishing an existing home, complete a professional feasibility and zoning review.

Contact 416 Construction to discuss your Toronto infill home and receive a coordinated plan for design, approvals, engineering and construction.

Build intelligently. Design for the property. Construct it properly with 416 Construction.

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