Costs depend on size, complexity, and finishes, but for early budgeting, typical ranges are:

$250–300 / sq ft — lower-end finishes
$300–350 / sq ft — mid-range finishes
$350–450 / sq ft — high-end finishes
$450+ / sq ft — luxury design and materials

Once drawings and scope are finalized, pricing becomes far more precise. And if we understand your budget early we can design an addition that delivers the most value within your reality.

This is always top-of-mind but tough to answer without context. Timelines depend on scope, access, inspections, and how/when decisions are made. Historically, we’ve completed smaller additions in under two months, while most fall in the five to eight month range from construction start. We prioritize planning, front-load decision making, and develop a timeline to keep everyone organized, accountable, and ensure expectations are well-managed.

In Toronto, home additions almost always require a building permit, and often zoning review as well. Permits ensure the work complies with structural, fire safety, energy, and setback requirements. Skipping permits can lead to stop-work orders, fines, and issues when selling your home. As part of our planning, we confirm what approvals are required, manage the process, and factor permit timelines into the overall schedule.

While it is sometimes possible to stay, we strongly recommend moving out during the process. Remaining on-site during construction will add more complexity to the project and inevitably add to the timeline, both of which can be directly tied to costs.

Every addition starts with understanding your goals, your property, and your budget. From there, the process moves through feasibility, design, permitting, and construction — each stage building on the last. We encourage you to visit our Process page for more information or request a Free Assessment to get started.

An addition can add significant value, but it’s not purely a dollar-for-dollar equation. Value depends on how well the space is designed, how it integrates with the existing home, and what the market values most—such as bedrooms, living space, or functionality. Well-executed additions typically increase both resale value and long-term livability, which is often the real return.

The maximum size of an addition is governed by zoning by-laws, including setbacks, lot coverage, height limits, and floor space index (FSI). Your existing house, lot size, and neighbourhood rules all play a role. What’s theoretically allowed and what’s practical or desirable aren’t always the same, which is why feasibility and early planning matter. We provide a Free Assessment to give you an idea of what your options are.