Starting from $180K · Second floor, rear & laneway
Second floor, rear, and laneway additions across Forest Hill, Rosedale, and Lawrence Park — with fixed pricing, permits handled, and a dedicated project manager from design through construction.
WSIB CertifiedFamily-Run50+ Projects4.9 Google
Trusted by 50+ Toronto homeowners
Maserat Developments helps homeowners in Forest Hill, Rosedale, Lawrence Park, Leaside, The Annex, and surrounding Midtown neighbourhoods add space without leaving the community they value. As a family-run design-build firm, we guide you from first feasibility review through construction and handover.
Each project includes full permit handling in-house and a dedicated project manager from design through handover. Whether you are exploring a second floor, rear expansion, or laneway suite, this page outlines the main options and how we work.
Toronto's narrow lots, heritage character, and mature tree canopies shape which addition types work on each property. These are the four paths homeowners most often consider when they need more space.
A second floor addition builds upward on your existing footprint — ideal when you need bedrooms, a home office, or a primary suite but cannot expand at ground level. It suits growing families in neighbourhoods like Lawrence Park and Leaside where lot depth limits rear expansion.
Explore our second floor additions service page for project examples and design-build details.
Rear additions extend the back of the house — often for a larger kitchen, open living area, or mudroom while preserving street-facing character. They work well when lot depth allows and you want ground-floor living space without building upward.
See rear and side addition options for how ground-floor expansions are planned on Toronto lots.
Side additions widen the home along one property line — useful on deep but narrow lots, or when rear setbacks and mature trees limit a back extension. They can add an ensuite, home office, or wider hallway without changing the home's front elevation.
Learn more on our rear & side additions page.
Garden and laneway suites are detached dwelling units at the rear of your property — with a separate entrance and services. They suit multi-generational living, a private home office, or rental income where Toronto zoning allows a secondary suite.
Read our laneway & garden suites page for feasibility, permits, and design-build scope.
Every Toronto property is different. These are the main factors we assess during feasibility and design — not a price list, but a clear picture of what shapes your project scope.
Foundation condition, load paths, stair placement, and roof tie-ins determine engineering scope — especially on pre-war homes in Forest Hill and Rosedale where reinforcement may be required before a second floor can be supported.
Lot width, depth, access for equipment, soil conditions, and proximity to property lines affect excavation, underpinning, and how much livable space can be added within zoning limits.
Heritage Conservation Districts, ravine setbacks, tree protection bylaws, and side-yard limits can require Committee of Adjustment hearings or design adjustments that affect both timeline and build approach.
Interior finish level, mechanical upgrades, architectural detail, and permit path (standard, FASTRACK, or variance) all influence scope. We flag the full approval path early so design reflects what the city will approve.
For a directional estimate by addition type, use our Home Additions Cost Calculator.
A clear, four-step path from first meeting to handover. Your dedicated project manager coordinates each phase and keeps you updated throughout — backed by our on-time completion guarantee.
We visit your property to understand your goals, assess structural feasibility, and review zoning constraints. Our team then develops architectural drawings and material selections for your approval. Once the design is confirmed, you receive a fixed-price contract — no open-ended allowances.
Maserat handles permits in-house — building permit applications, Committee of Adjustment hearings when needed, heritage alteration permits, and TRCA review for ravine-adjacent properties. We do not start demolition until approvals are in place.
Licensed trades execute structural work, systems installation, and interior finishing. Your dedicated project manager provides regular progress updates, coordinates city inspections, and manages the site so disruption stays predictable.
We walk you through the completed space, confirm every detail meets our standards and your expectations, and provide documentation for warranties and maintenance. Our on-time completion guarantee applies through to final handover.
Most home additions in Toronto require a building permit before construction begins. Established neighbourhoods often carry additional requirements — heritage alteration permits in conservation districts, TRCA review near ravines, tree protection bylaws, and Committee of Adjustment hearings for minor variances on setbacks or height.
We manage the full approval path so you are not navigating City departments on your own. For permit types, review timelines, and what to expect at each stage, read our Toronto Building Permit Guide.
A free consultation on your property covers feasibility, the permit path, and what to expect before design begins.
Free consultation · No obligation · Response within 24 hours
Or call (416) 876-1052
A family-run design-build firm with 50+ Toronto projects — we take on fewer projects than volume contractors so every addition receives direct attention from the same team.
Your contract price is set after design approval — not a range that grows during construction. You know the full scope before work begins.
One point of contact from consultation through handover — coordinating trades, inspections, and updates so you always know where the project stands.
WSIB Certified and fully insured. As a family-run firm, decisions stay with the team you meet at consultation — not a rotating subcontractor network.
Rated 4.9 on Google across Toronto homeowners, with 50+ completed projects and an on-time completion guarantee on every build.
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.
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
View projectsToronto home addition costs, ROI data, permit timelines, and design guidance. Everything you need before adding on.
Real return data by addition type. Neighbourhood-ceiling rule and the secondary-suite income angle.
Cost GuidePer-sqft pricing, the costs most homeowners forget, permit timelines, and build up vs build out.
Addition TypeWhen rear addition makes sense vs second-floor or moving. Zoning, design, and common mistakes.
Addition Type2026 costs, zoning rule changes, rental income potential, and permits for secondary suites.
PlanningWhat to look for, how to compare quotes, red flags to avoid, and why design-build makes sense.
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What happens next
Anna MercerClient Journey Specialist
Common questions about planning, permits, timelines, and pricing for Toronto home additions.
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