Toronto design and build
Home renovations, additions and custom homes.
Plan your design, scope and budget before construction begins.
Our Services
Discuss your projectWhat we do
Explore the ways we work with Toronto homeowners, with design and planning considered from the start.
Tell us what you want to change. We can discuss your property, the proposed work and the next planning step.
Custom home builders in Toronto, coordinating design, permits and construction around your home and the way you want to live.
Architectural design and permit planning for your project.
In house architectural design, permit applications, and zoning compliance across the GTA.
Our design team creates your custom drawings, and you see your home before we build it.
Typically 1 to 8 months
Explore design & permits
Whole-home renovations that bring the layout, structure, services and finishes into one plan.
Full home renovations, kitchen and bathroom remodels, and open concept transformations.
Typically 1 to 15 months
Explore home renovations
Rear additions, second storeys and side extensions planned around how the new space connects to your home.
Expand your living space. Rear additions, second storeys, and side extensions across the GTA.
Typically 4 to 10 months
Explore home additions
A new home designed around your lot, your household and the way you want to use each space.
Design to handover custom builds tailored to your lot and how you live, thoughtfully planned before construction begins.
Typically 12 to 20 months
Explore custom homes
Laneway and garden suites planned around your property, access and how the additional living space will be used.
From design to construction for Toronto laneway and garden suites.
Typically 4 to 7 months
Explore laneway & garden suites
Project management through planning and construction.
Dedicated project coordinators, progress tracking, and on site supervision from ground break to handover.
The home is thoughtfully planned before construction begins. We handle City of Toronto permits, and you get weekly updates and inspections at every milestone.
Explore project managementBefore construction begins
Design, permits and build in house. A home designed around your life, thoughtfully planned before construction begins.
The whole job is designed around how you live, and thoughtfully planned before construction begins.
Completed work
A rear addition. Painted brick, full height windows across the back, and an elevated deck sitting over a paved terrace.
A three storey infill on a narrow lot, eleven metres from established grade to the top of the parapet. Buff veneer brick under a black clad set back top floor.
Completed 2026
Pale limestone across the whole frontage, with a cedar clad panel set over the garage opening and a black metal band carried across under the upper storey to tie the two together. The roof is flat to the street rather than gabled, which is what lets the upper windows run right up to the fascia.
Completed 2026
A ground up custom home. Grey stone and limestone across the front, gabled dormers, and the garage set below the entrance so the main floor sits up off the street.
Fifteen feet of bathroom, planned as three zones: a glass shower just over five feet square, a 6'-7" freestanding tub set under the window, and the water closet behind its own door.
Completed 2026
A two storey garden suite clad in black vertical seam metal, with sliding doors opening onto a paved path and a cedar fence run alongside it.
Two custom homes built side by side on one street, one in pale brick and one in dark, with black window frames carried across both.
Red brick over a limestone base, steep gables, and a limestone surround to the entrance with a black bay window set beside it.
How the work moves forward
Understand the proposed work, the decisions ahead and what needs to be agreed before construction.
Talk through your project ↗Tell us about the property and your goals. Review the proposed feasibility study, its scope and any fees before proceeding.
Work through the proposed design, inclusions, exclusions and responsibilities before construction.
Review the drawings and how the layout, structure and services work together.
Review materials, cabinetry, fixtures and design direction at our North York design centre.
Confirm the required approvals and construction scope. Follow the schedule, decisions and updates through the project.
Review the completed work, record outstanding items and confirm the applicable closeout and warranty documents.
1558 Avenue Rd, North York
Materials, finishes, cabinetry, fixtures, and design direction. You can review your selections in one place with your own coordinator.
Browse our catalogue from home, then pick every finish and fixture in one visit to our design centre.
Your selections, together in one place.
Book a Visit ↗
From a homeowner
“Grand Design Build did a great job on our renovation. Their team was organized, kept us informed through each step, and also delivered quality work. They were reliable with timelines and very clear about costs and materials. Overall, we had a very smooth experience with them. Highly recommended!”
Grand Design Build did a rear addition, second storey, and all our bathrooms on a house in the Beaches. March to September 2025. We were told end of September and moved back in the second week, so a bit ahead of schedule. Fixed price contract, and the final cost was exactly the contract number. That mattered a lot to us. We decided to change few items for bathrooms and kitchen halfway and there were no issues with the change orders, and the pricing was really fair even though a fixed contract was signed. There were no pushback. The office project coordinators and the site supervisor were really helpful the entire way through. They also kept the site tidy for six months straight and our neighbours never once complained. Respectful crew. Recommend them.
Allen and his team were a dream to work with. Truly an amazing experience and an incredible condo full renovation. The work was top notch and Allen was excellent to work with, respecting our ideas and desires and making our renovation dream a reality.
I had a really good experience working with Grand Design Build on my home renovation and rear addition project. Their team was professional, knowledgeable, and easy to work with throughout the process. They took the time to understand our needs, offered helpful suggestions along the way, and also provided complimentary interior design support, which was a great added value. They were responsive and attentive to questions as they came up, and the project stayed on track from start to finish. I would recommend Grand Design Build to anyone looking for a reliable custom build and design company in Toronto.
Grand Design Build exceeded every expectation we had. From the very first consultation, they were professional, transparent, and truly passionate about their work. If you’re considering custom home building in Toronto, you won’t find a more reliable and talented team. Our new home is stunning, and the attention to detail is second to none. We are so grateful for their dedication and highly recommend them.
Grand design build are a master in custom home building in Toronto for sure. They designed and built our place just exactly how we wanted it. They are very reliable when it comes to communication and planning.
Who we answer to
Every one of these is checkable before you sign anything.
Licence 63012. Check the Ontario Builder Directory for current licence details.
Review current insurance documents and confirm the coverage that applies to your project.
Google rating recorded 5 October 2026. View the current reviews on Google.
Listed in the Toronto Construction Association directory for custom homes and design build services.
Areas we serve
Find information for your neighbourhood, or send us your address to discuss whether we can serve your project.
Can’t find your neighbourhood?
We build across Toronto and the GTA. These are the ones we work in most, not the only ones we work in.
You’ll know your price before a single wall comes down, and exactly what happens at every stage.
Before you get in touch
Tell us about the property, the work you are considering and what you want to achieve. We can discuss the proposed scope and the next step towards a feasibility study.
Review the design, scope, inclusions, exclusions and allowances together. The contract should explain what is included and how changes are priced.
Mention the drawings when you contact us. We can discuss the work you need help with and the information required for the next planning step.
Questions homeowners ask before they call
Bring your questions to the consultation. We will walk through the details with you.
A cost plus contract charges the actual cost of labour and materials plus an agreed fee. Our fixed price contract sets an itemised price for the defined scope before construction. The contract explains what is included and how changes are priced.
Cost depends on the property, existing conditions, size, services and finishes. A feasibility study helps establish the scope and decisions needed before a detailed proposal. Contact Grand Design Build to discuss the study and next steps.
The schedule depends on design, approvals, site conditions, servicing and the construction scope. Review the proposed stages and schedule before signing, including any demolition or teardown and rebuild work.
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.
Ask for current licensing, insurance and applicable warranty documents for the proposed work. The requirements and protections depend on the project and should be reviewed with the contract.
Yes. We can adjust the scope and price to work with your existing design, or work alongside your architect or designer.
We work as a custom home builder across Toronto, including North York, Forest Hill, Rosedale, Bloor West Village, Leaside, The Beaches and South Etobicoke. Send us your property address to discuss the proposed work and the next planning step.
Cost Guide
Kitchen renovation cost drivers in 2026, including scope, cabinetry, counters and labour, with planning considerations for Toronto homes.
Read the guide
Cost Guide
How scope, property conditions, permits and finishes shape the cost of a Toronto house extension in 2026.
Read the guide
Bylaws
What Toronto’s noise bylaw actually allows during a renovation, and how to keep the people next door on your side.
Read the guide
Cost Guide
What a second storey addition costs in Toronto in 2026, and how to budget for it before you start.
Read the guideStart here
Share your property and the work you have in mind. We can discuss your goals, the proposed scope and the next planning step.
Tell us what you want to change and what you want to keep. We can discuss your property, the proposed work and the next step towards a feasibility study.
