When you love your house but need more of it. Second-storeys, rear extensions, and in-law additions designed to feel like they were always part of the original home.
The math has shifted decisively. With GTA land transfer taxes, real estate commissions, mortgage breakage fees, and the cost of buying a comparable upgraded home, the all-in cost of moving up the property ladder typically lands between $250K and $400K — money that disappears into transaction costs and produces no improvement to where you live.
An addition redirects that same budget into your actual home. Done well, it adds permanent value, customizes the space exactly to your family's needs, and avoids the disruption of selling, packing, and uprooting school catchments and commutes.
Second-storey additions — adding a full or partial second floor to a bungalow or 1.5-storey house. The most cost-efficient way to dramatically increase square footage on a small lot. Typically adds 500–1,000 sq ft of bedrooms, primary suite, and bathrooms.
Rear extensions — extending the back of the house into the yard. Common targets: enlarged kitchen, family room, primary suite on the main floor, or a connected in-law suite. Best for lots with deep backyards where preserving front-of-house character matters.
In-law suites and integrated additions — adding a self-contained living space connected to the main house via a doorway. Combines the privacy of separate living quarters with the convenience of an integrated home. Great for multigenerational families or as a future rental conversion.
The hardest part of any addition is the seam — where the new construction meets the existing house. Roof lines that don't quite align. Floors that don't quite match levels. Brickwork that ages differently. We've seen every version of these problems and price them realistically into every quote, rather than discovering them mid-project.
The other underestimated factor: you're typically living in the house during construction, or coordinating short-term housing if you're not. We plan dust separation, utility scheduling, and access logistics carefully — it's part of why our projects come in on time.
Pricing varies more than other service lines because every existing home is different. These are typical 2026 GTA ranges.
Most can — but it has to be assessed. The two factors are foundation capacity (most GTA homes from the 1950s onward are over-engineered enough to support an additional storey) and existing wall framing. Our structural engineer reviews both during the assessment phase and includes any required reinforcement in the fixed-price quote.
For rear extensions and side additions, usually not — we section off the construction area with full dust separation and stage utility transitions to minimize disruption. For full second-storey additions, you typically need to move out for 4–8 weeks during the demolition and roof phase. We help plan this and factor short-term housing into the project timeline.
Rear extensions: 6–8 months from contract to completion. Second-storeys: 8–12 months. Major expansions: 10–14 months. About 3–4 months of every timeline is design and permits — Committee of Adjustment hearings can add 8–12 weeks if your design exceeds standard envelope rules.
Sometimes — it depends on whether the design fits within Toronto's "as-of-right" envelope (height, setback, floor space ratio limits). If it doesn't, you'll need a minor variance, which means a Committee hearing. We design to as-of-right where possible to avoid the timeline impact, and we represent you at the hearing if a variance is unavoidable.
In the GTA, well-executed additions typically recover 70–90% of project cost in immediate appraised value, and full cost or more over 3–5 years as the renovation premium gets absorbed into the home's market value. The real value is functional — staying in the home and neighborhood you love rather than absorbing six-figure transaction costs to move.
60-minute assessment, structural feasibility check, fixed-price quote within 5 business days. We'll tell you exactly what's possible — and what it really costs.
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