Premium Renovations, Additions and Custom Homes in Toronto
From Design to Warranty
A stress-free build for homeowners with busy schedules who value their time as much as their home.
Why Grand Design Build
Four things that make a project stressful.
We remove
all four.
See How It Works →Your price locked before you sign.
A fixed-price proposal built around your home, broken down by line item, before any work begins.
One team, from first sketch to final warranty.
Design, permits, construction and warranty all sit under one contract and one point of contact.
Structural coverage on every project.
The Grand Warranty backs every home we work on, followed by a full year of complimentary home service after handover.
One coordinator on-site, plus a live view of your project.
A dedicated project coordinator supervises on-site, and you get portal access to track progress, schedules, and updates as the work happens.
1558 Avenue Rd, North York
One design centre, not ten different supplier showrooms.
Materials, finishes, cabinetry, fixtures, and design direction. Every selection happens in one place, with your own coordinator, not scattered across a dozen supplier appointments.
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What We Do
Renovation, addition, or a custom build, priced and built the same way.
Licensed by the HCRA, building across the GTA since 2010, with one point of contact accountable for your project from start to finish.
Design & Permits
Design & Permits
In-house architectural design, permit applications, and zoning compliance across the GTA.
Home Additions
Home Additions
Expand your living space. Rear additions, second storeys, and side extensions across the GTA.
Home Renovations
Home Renovations
Full-home renovations, kitchen and bathroom remodels, and open-concept transformations.
Laneway & Garden Suites
Laneway & Garden Suites
From design to construction for Toronto laneway and garden suites.
Custom Homes
Custom Homes
Design-to-handover custom homes tailored to your lot, lifestyle, and budget. Fixed price from day one.
Homeowner Reviews
Clients say we're easy to work with.
4.9★ Google Reviews
“Grand Design Build are masters in custom home building in Toronto. They designed and built our place just how we wanted it.”
Kumar Tanwar, Custom Build“If you’re considering custom home building in Toronto, you won’t find a more reliable and talented team. Our new home is stunning.”
Will, Custom Build“Organized, kept us informed through each step. Reliable with timelines and very clear about costs and materials.”
Lima Rodwesko, RenovationThe Process
Six stages, from first sketch to final walkthrough.
From your first conversation to final handover, with a fixed-price scope locked in before construction starts.
Consultation
Free, no obligation. We walk through your goals, take measurements, and review existing conditions.
Proposal & Scope
A preliminary proposal, a detailed scope document, and a fixed-price structure broken down by line item.
Select Your Materials
Browse our full catalogue room by room from home, then finalize every finish, fixture, and material in one visit to the design centre.
Drawings & Permits
Our in-house architects create your custom blueprints. We manage the entire City of Toronto permit process.
Build & Inspections
Thorough inspections at every milestone to ensure full compliance with the Ontario Building Code.
Handover & Warranty
A final walkthrough, backed by the Grand Warranty and a year of complimentary home service.
Frequently Asked Questions
Everything you'd ask before committing.
How the process works, what it costs, and what to expect.
Cost depends on lot conditions, square footage, finish level and scope. We visit your property first, then build a fixed-price proposal around what we actually find, walked through with you in person at the design centre.
Most high-end builders work on a cost-plus basis, where you pay the actual cost of labour and materials plus a fee on top. The financial risk is yours. Grand Design Build prices the full defined scope before we break ground, so if a cost shifts during construction, that’s our risk to manage.
A straightforward new build typically runs six to twelve months once permits are approved; a fully custom home tends to run twelve to eighteen months, largely due to design and permitting time.
No. You browse and shortlist materials online through our material library, then finalize every finish, fixture, and material in one visit to our design centre.
No problem. We can drop design from the scope and adjust the price accordingly, or work alongside your architect or designer if you would rather keep them involved.
Yes. We handle the structural, utility and permit requirements specific to Toronto’s laneway and garden suite bylaws, from initial design through to final construction.
Licensed by the HCRA and fully insured across every project, backed by our own Grand Warranty.
A strong concentration in North York, Forest Hill, Rosedale, Bloor West Village, Leaside, The Beaches, and the surrounding central Toronto neighbourhoods, along with wider GTA municipalities.
From the Blog
Renovation Guides
What a kitchen renovation actually costs in 2026, broken down by scope, cabinetry, counters, and labour, with Toronto numbers.
2026 pricing per square foot for a Toronto house extension, plus the permits and factors that move the number.
What Toronto’s noise bylaw actually allows during a renovation, and how to keep the people next door on your side.
What a second storey addition costs in Toronto in 2026, and how to budget for it before you start.
Areas We Serve
Proudly Serving Toronto's Premium Neighbourhoods
A short list of areas we know well.
Also serving Danforth Village, Don Mills, Downtown, East York, Eglinton West, Leslieville, Oakville, Old Toronto, and Richmond Hill. Don't see your area? Ask us directly.
Ready When You Are
Your renovation, without the runaround, starts with one conversation.
One team, one fixed price, one design centre, start to finish.
Share the Project Details
Tell us what rooms are involved, where the project is, and when you want to move.