Renovation, Addition and Custom Home Builder in Toronto
From Design to Warranty
Book a free consultation, and we’ll walk through your space with you and map out what it will take.
What We Do
Renovation, Addition & Custom Build Services in Toronto
Grand Design Build is a full-service custom home build firm licensed by the HCRA and operating across the GTA since 2010. We handle every stage in-house, from initial design and permits through to construction and final walkthrough. One point of contact and one team accountable for the outcome of your dream home.
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 builds tailored to your lot, lifestyle, and budget. Fixed price from day one.
Project Management
Project Management
Dedicated project coordinators, progress tracking, and on-site supervision from ground break to handover.
1558 Avenue Rd, North York
The Design Centre: See What You Are Paying For
Materials, finishes, cabinetry, fixtures, and design direction. Every selection happens in one place, with your own coordinator, not scattered across a dozen supplier appointments.
Book a Visit
Our Process
You’ll know your price before a single wall comes down, and exactly what happens at every stage.
Free Consultation
We visit your home, listen to your goals, take measurements and check existing conditions. No obligation.
Your Itemized Proposal in 48 Hours
A detailed scope and price, broken down line by line, so you know exactly what you’re paying for.
Design Your Space
Our design team creates your custom drawings, and you see your home before we build it.
Choose Your Finishes
Browse our catalogue from home, then pick every finish and fixture in one visit to our design centre.
Price Locked, Permits Handled, Build Begins
Your fixed price is signed before work starts. We handle City of Toronto permits, and you get weekly updates and inspections at every milestone.
Handover & Warranty
We walk through every detail with you before handover. Your home is backed by our structural warranty.
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.
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.
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, RenovationAreas We Serve
Proudly Serving Toronto's Premium Neighbourhoods
Grand Design Build provides full-service design and construction across the Greater Toronto Area. We are active custom home builders in Toronto and the following neighbourhoods:
Also serving Danforth Village, Don Mills, Downtown, East York, Eglinton West, Leslieville, and Old Toronto. Don't see your area? Ask us directly.
Licences and Memberships
HCRA Licensed
Licensed by the Home Construction Regulatory Authority, Ontario's regulator for new home builders and vendors. Licence no. 63012.
Fully Insured
Fully insured up to $5 million on every project.
- 4.9
Google Reviews
Rated 4.9 stars by homeowners on Google.
Association Member
A member of the Toronto Construction Association, the city's construction industry body.
Frequently Asked Questions
Everything you'd ask before committing.
How the process works, what it costs, and what to expect.
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, and 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, not yours.
Cost depends on lot conditions, square footage, finish level, and scope. We offer a detailed, itemized quote within 48 hours of our first conversation, broken down line by line.
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.
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 seven-year structural guarantee.
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.
We work as a custom home builder across Toronto, with 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.
Ready When You Are
Your renovation starts with one conversation.
Talk to a custom home builder in Toronto. One team, one fixed price, one design centre, start to finish.
Share the Project Details
Tell us about your project and when you're planning to start.