Home additions Toronto homeowners plan with us for a clear home addition cost before permits — second floor, rear or side, or laneway. Designed and built under one roof with fixed pricing.
Avoid the cost and stress of moving by expanding the home you love. From second floor additions in Forest Hill to rear additions in Rosedale and laneway suites or garden suites in Lawrence Park and Leaside, we handle design, permits, and construction as one integrated team — with fixed pricing, a dedicated project manager, and our on-time completion guarantee. You stay informed at every stage so there are no surprises. Book a free consultation — or estimate budget with our calculator in the pricing section below.
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Many families ask why they should add on instead of moving. For households in Forest Hill, Rosedale and Leaside, the decision is not only about square footage — it is about staying on the street you know, keeping kids in the same schools, and avoiding the land transfer tax, commissions and moving costs that come with a purchase. A well-planned addition can capture 70–85% of the project cost in immediate property value while you keep your existing mortgage terms and location.
When home addition cost is weighed against the cost of moving in Toronto's market, expanding often wins when you already love the lot, the orientation and the neighbourhood. We help you compare scenarios with a fixed-price mindset — no vague allowances — so you can decide with numbers.
A move can trigger tens of thousands in land transfer tax and commissions alone. An addition invests in the asset you already own and keeps disruption in one place — your current address.
Quality additions in established Toronto areas often align with 70–85% ROI in added value when done with permits, design continuity and finishes that match the street.
You keep your networks, schools and daily rhythm. We design additions that respect your home's character — traditional or contemporary — so the new space feels intentional, not bolted on.
Design, permits and construction sit under one contract with a dedicated project manager. Timelines vary by scope and Committee of Adjustment paths; we give you a realistic schedule up front.
Every home has the potential to grow, and with Maserat Developments, you can expand with confidence. As Toronto’s premier home addition contractor, we specialize in high-end, custom-built expansions that enhance your living space, reflect your lifestyle, and add lasting value to your home.
Transform Your Home with Custom Additions. Unlock new possibilities with expanded living spaces, increased home value, and modern designs tailored to your vision. Here are some of the tailored home addition options we offer:
Learn how to choose the right addition contractor for your project.
Double your living space with a beautifully integrated second-story addition. Perfect for growing families who need more bedrooms or a home office, these expansions blend seamlessly with your home’s architecture and can increase rental income.
Explore our 2nd & 3rd Floor Extensions
Expand your living space with expertly designed room extensions, ideal for creating spacious kitchens, comfortable home offices, or luxurious master suites. Our additions enhance functionality and style without requiring relocation.
Discover our Rear & Side Expansions
Transform your garage into valuable living space, such as a home office, rental unit, or guest suite, or add a second story to maximize your property’s potential. Our garage conversions are customized, city-compliant, and designed to integrate seamlessly with your home.
Learn About Laneway & Garden SuitesHome addition costs in Toronto depend on addition type, site conditions, and finish level. Below are real 2026 per-square-foot ranges from completed Maserat projects across Forest Hill, Rosedale, Lawrence Park, Leaside, and The Annex — with factors that move the number up or down.
$350–$450/sqft
For an 800 sqft addition, typical total: $280,000–$360,000. Luxury specifications in Forest Hill and Rosedale trend toward the upper range.
Includes new roof, structural engineering, mechanical/electrical rough-in, and full interior finish.
$360–$480/sqft
A 500 sqft rear expansion typically runs $180,000–$240,000. Ground-floor additions often cost slightly more per sqft due to foundation work.
Includes excavation, new foundation, kitchen or living space finishing, and integration with existing home.
$450–$600/sqft
A 700 sqft laneway suite typically runs $315,000–$420,000. Toronto's 2025 zoning updates (By-laws 847-2025 / 849-2025) and free pre-approved plans can reduce design costs.
Includes separate services, kitchen, bathroom, and full interior — suites deliver 80–90% of build cost back in property value.
Maserat Developments is a family-run design-build firm — 50+ Toronto projects — with deep experience in Toronto’s diverse housing stock and building regulations. Incorporated in 2017, we focus on fewer projects and higher standards on every addition.
We ensure your home addition delivers the space you need with fixed pricing, clear documentation and a dedicated project manager from consultation to handover.
We build additions that comply with all safety codes, add valuable space to your home, and make your house more comfortable for years to come—all with meticulous attention to detail and proven results.
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At Maserat, we offer a comprehensive approach to home additions, ensuring a seamless experience from start to finish. Our team of experienced home addition contractors in Toronto makes the process simple—from obtaining permits to building. We’re committed to delivering high-quality results that exceed your expectations and add value to your Toronto home.
Custom designs tailored to your vision. Custom 3D renderings let you see your addition before construction begins.
Navigating Toronto’s building regulations. We handle Building Permits, Committee of Adjustment hearings, heritage permits, and TRCA approvals.
Bringing your addition to life. From foundation to finishing, our trades are vetted for the structural complexity additions require.
A simplified approach designed to make your renovation experience smooth and worry-free. These timeframes represent typical project durations and may be shorter or longer, depending on your specific scope and requirements.
We begin with an on-site visit to understand your vision, assess your space, and discuss your budget parameters.
Your journey begins with a friendly on-site consultation to understand your vision. Structural feasibility and local permit requirements are assessed for your specific property.
Receive clear budget guidance and explore initial design concepts together. Every recommendation focuses on creating spaces that perfectly suit your lifestyle.
Our design team produces detailed architectural drawings for your approval. Floor plans and elevations are designed to reflect your vision. Select materials and finishes that complement your style with expert guidance.
Visualize your future space using realistic 3D visualizations before construction starts. Collaborative refinements ensure the final design feels just right for your family.
We handle all building permit applications and approvals in Toronto.
All permit paperwork is handled for you with minimum hassle. Enjoy peace of mind with our 100% approval rate on building permits.
Committee of Adjustment applications are managed when needed for your project. Relax while the complex technical details are expertly coordinated on your behalf.
Our skilled tradespeople bring your vision to life. Your home is protected through careful site preparation techniques. Licensed professionals complete all structural work and systems installation.
Watch your vision come to life during the interior finishing stage. Expect weekly updates and a consistently clean worksite throughout the process.
We complete all final details. All final inspections and building code approvals are secured for your peace of mind.
Tour your completed space during a thorough quality walkthrough. Learn how everything works and receive easy-to-reference documentation.
Your project concludes with a celebration followed by ongoing support as you enjoy your new space.
Let's discuss your project — book a free consultation and get a fixed-price quote tailored to your home.
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If you’re planning a home addition in Toronto, obtaining the right permits is essential. Don’t worry—we take care of everything, but here’s a quick look at what’s involved:
Required for any structural changes to your home. The city reviews your plans to ensure they comply with safety and building codes.
You can find more details in Toronto’s official permit guide.If your addition doesn’t follow local zoning rules (like how close it is to your neighbour’s property), we may need to apply for a minor variance. This includes a hearing and takes extra time.
Learn more about minor variances and consent applications.If your home is in a heritage district, special approval is needed to keep the area’s historic character.
Homes near ravines or rivers might need extra approval from the Toronto and Region Conservation Authority.
We typically submit applications 4–6 weeks before the start of construction. A standard Toronto building permit review typically takes 10–15 business days, depending on the project scope and required approvals.
We’ve completed 50+ projects. Here’s what clients say about working with us.
Professional from start to finish. Our addition looks exactly as we hoped and came in on time and on budget.
Fixed pricing meant no surprises. The team was respectful of our home and kept the site tidy.
We needed more space without moving. Maserat delivered a beautiful second floor addition and made the process straightforward.
Our laneway suite was built on time and to code. Clear communication throughout.
The rear addition feels like it was always part of the house. Highly recommend.
From design to handover, Maserat made a complex addition feel manageable. Clear communication and fixed pricing gave us confidence throughout.
Every project is different. We give you a fixed quote after the consultation so you can plan with confidence. See our detailed cost breakdown for Toronto home additions.
$180K – $240K
Varies by scope
$280K – $360K
Varies by scope
$315K – $420K
Varies by scope
Plan smarter with a real-time estimate tailored to your home. Use our interactive tool to estimate your home addition costs — no sign-up is needed.
Find answers to common questions about Home Addition Services.
Have more questions? Browse our complete FAQ centre →
Thoughtfully designed home additions across Toronto's most established neighbourhoods — expanding your space without leaving the street you love.
View all service areas →Second-floor additions on established lots
View projectsRear & side additions on heritage properties
View projectsFamily home expansions & second-floor additions
View projectsSemi-detached additions & rear expansions
View projectsHeritage-compliant additions & rear expansions
View projectsTownhouse additions & vertical expansions
View projectsPeriod-sensitive additions on grand properties
View projectsEdwardian home additions & rear expansions
View projectsDetached home additions & upper-floor expansions
View projectsGround-floor & second-floor expansions
View projectsRavine-lot additions with TRCA coordination
View projectsInfill additions & vertical expansions
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