Frequently Asked Questions

Home additions in Toronto typically range from $350 to $450 per square foot. For a standard 800-square-foot second-floor addition, this translates to $280,000 to $360,000. The final cost depends on interior finishes, structural complexity, and mechanical/electrical upgrades. In luxury neighbourhoods like Rosedale and Forest Hill, costs often trend toward the higher end. Your consultation includes a detailed, fixed-price quote.

Garden suites typically cost $400–$550 per square foot, while laneway suites range from $450–$600 per square foot. Cost drivers include foundation requirements, utility connections, interior finishing level, and architectural complexity. Premium suites in Forest Hill, Rosedale, and Lawrence Park typically include higher-end finishes at the upper end of these ranges. Using the City of Toronto's new free pre-approved "Made in Toronto" plans can reduce design and permit costs significantly while keeping construction costs within these ranges.

Rear and side expansions commonly range from $360 to $480 per square foot. For a standard 500-square-foot expansion in a premium neighbourhood, that typically equates to $180,000–$240,000. Key cost factors include foundation requirements, interior finishes, mechanical upgrades, window and door specifications, and site access constraints. Your consultation includes a fixed-price quote.

A home addition typically takes 6 to 14 months end-to-end. The pre-construction and permitting phase runs 2–6 months (projects that are fully zoning-compliant can clear permits in 1–2 months, while those requiring a Committee of Adjustment hearing for minor variances add 3–6 months). The active construction phase typically runs 4–8 months depending on complexity. We provide a detailed schedule that separates these phases so your expectations are realistic from day one.

Most rear and side expansions take 5–9 months from planning through final inspections: 2–3 months for design, drawings, and permit approval, followed by 3–6 months for construction. Laneway and garden suites typically take 6–10 months total. Premium projects in established neighbourhoods often require more detailed design and heritage review.

Toronto's zoning for laneway and garden suites was updated in 2025 (By-laws 847-2025 and 849-2025) following provincial regulation 462/24, making them as-of-right in most residential zones. Key rules include height limits of up to 6.3 m when properly separated, minimum 4 m or 7.5 m separation from the main house depending on height, and one parking space per unit. Laneway suites require your lot to abut a public laneway with a minimum 3.5 m frontage; garden suites are the alternative for lots without laneway access. The City now offers free pre-approved "Made in Toronto" plans that comply with the Ontario Building Code, saving thousands in custom architectural fees and speeding permits. Development charges can be deferred interest-free for 20 years. Strict soft landscaping minimums apply — 60% of the area between the main house and suite on lots 6 m wide or less, and 85% on wider lots. Fire access must provide a clear path within 45 m of a public street via the laneway or 90 m through the side yard.

All home additions require a Building Permit from the City of Toronto and a Zoning Review for bylaw compliance. Zoning-compliant projects under 100 m² can use the City's FASTRACK process (5–10 business days). However, many additions in established neighbourhoods trigger a Committee of Adjustment hearing for minor variances, which adds 3–6 months to the pre-construction timeline due to public notice periods and appeal windows. Depending on your property, you may also need Toronto and Region Conservation Authority approval (for homes near ravines), heritage permits (in conservation districts), or tree protection permits — Toronto's Private Tree By-law protects any tree with a trunk diameter of 30 cm or more, and removal fines can reach $100,000 per tree. We manage all applications and flag these requirements early in the feasibility stage so there are no surprises.

All expansions require a building permit from the City of Toronto. Zoning bylaws define setback requirements (typically 7.5–10.5 m for rear yards), lot coverage limits (35–50%), and Floor Space Index (often 0.6–1.0 in residential areas). As of 2026, laneway and garden suites benefit from updated as-of-right zoning (By-laws 847-2025 and 849-2025) and free pre-approved "Made in Toronto" plans that speed approvals and reduce design costs. Development charges for suites can be deferred interest-free for 20 years. Depending on your property, you may also need Committee of Adjustment approval for variances, heritage permits in conservation districts, Conservation Authority approvals near ravines, or tree protection permits for protected trees (trunk diameter 30 cm+). We manage all applications and maintain a strong first-time approval rate.

For most of the project, yes. We use contained work zones, sealed barriers, and air filtration systems to minimize disruption. However, temporary relocation is usually required for 3–4 weeks during major structural work and roof removal to ensure the safety and comfort of your family. Your project manager creates a custom plan to minimize inconvenience.

Yes — most homeowners remain at home throughout construction. We create effective separation between work zones and living areas with temporary dust walls, dedicated exterior access for crews, phased mechanical updates, and daily site cleaning. For kitchen expansions we set up temporary facilities. Your project manager develops a plan based on your family's needs.

We focus on seamless integration: exterior harmony through matching materials and proportions, interior transitions with consistent flooring and millwork, structural integration that preserves architectural integrity, and coordinated mechanical, electrical, and plumbing systems. Our design-build approach means design, engineering, and construction teams collaborate from the earliest stages.

While we specialize in second-floor additions, we also design and build ground-level rear additions, side additions, and laneway or garden suites. Whether you need to expand your main floor living space, add a family room, or build an income-generating secondary suite, we handle design, permits, and construction as a single integrated team.