Custom home builder · Toronto & the GTA
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.
Of building and renovating in Toronto
Completed across Toronto and the GTA
Fully insured and licensed for your protection
Fully itemized, line by line
Locked before work begins. No surprises
Design, build and warranty under one contract
Why your budget holds
We price the whole job before we break ground, so the number you sign is the number you pay.
We price the full defined scope line by line and lock it into your contract before any work starts. If a cost shifts during construction, that's ours to manage. You plan around one number, from the first drawing through to handover.
- Your price locked before you sign, broken down by line item.
- One team, from first sketch to final warranty, under one contract.
- A dedicated coordinator on site, plus portal access to track progress.
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.
01Design & Permits
In-house architectural design, permit applications, and zoning compliance across the GTA.
02Home Additions
Expand your living space. Rear additions, second storeys, and side extensions across the GTA.
03Home Renovations
Full-home renovations, kitchen and bathroom remodels, and open-concept transformations.
04Laneway & Garden Suites
From design to construction for Toronto laneway and garden suites.
05Custom Homes
Design-to-handover custom builds tailored to your lot, lifestyle, and budget. Fixed price from day one.
06Project Management
Dedicated project coordinators, progress tracking, and on-site supervision from ground break to handover.
The work
Recent projects
Recently completedTreelawn Parkway 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.
Cliffcrest A ground-up custom home in Cliffcrest, where the 1950s bungalows on the Bluffs are steadily being replaced. 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.
Douglas Avenue 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.
Cliffcrest kitchen The coffered ceiling, the panelled hood surround and the glass-front uppers either side of it were settled in the design render before a cabinet was ordered. It was built to match, down to the dark panelled island under a single run of stone.
De Vere Gardens 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.
How it works
Our Process
You'll know your price before a single wall comes down, and exactly what happens at every stage.
- 01
Free Consultation
We visit your home, listen to your goals, take measurements and check existing conditions. No obligation.
- 02
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.
- 03
Design Your Space
Our design team creates your custom drawings, and you see your home before we build it.
- 04
Choose Your Finishes
Browse our catalogue from home, then pick every finish and fixture in one visit to our design centre.
- 05
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.
- 06
Handover & Warranty
We walk through every detail with you before handover. Your home is backed by our structural warranty.
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 VisitOne appointment, not six Saturdays.
CabinetryWALNUT, SHAKER
VanitiesWALNUT, FLOATING
TileHERRINGBONE
StoneVEINED QUARTZ
FixturesMATTE BLACK
Homeowner reviews
What homeowners say
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 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 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.
Areas we serve
Not a wide net. A short list of Toronto areas we know well.
- Bayview Village
- Bloor West Village
- Cliffcrest
- Danforth
- Forest Hill
- Leaside
- Ledbury Park
- North York
- Rosedale
- The Beaches
- Willowdale
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.
Who we answer to
Licences and memberships.
Every one of these is checkable before you sign anything.
HCRA Licensed
Licensed by the Home Construction Regulatory Authority, Ontario's regulator for new home builders and vendors.
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
Questions homeowners ask before they call
If the answer you need is not here, ask us on the call. We would rather tell you now than at framing.
Key facts about Grand Design Build
- What it is
- A design-build custom home builder in Toronto, handling design, permits, construction and warranty in-house.
- Pricing model
- Fixed price, itemized line by line and locked before you sign. Not cost-plus.
- Established
- 2010, with 250+ projects completed.
- Licensing
- Licensed by the HCRA and fully insured on every project.
- Where
- 1558 Avenue Road, North York, Ontario M5M 3X5. Serving Toronto and the GTA.
- Quote turnaround
- A detailed, itemized quote within 48 hours of the first conversation.
How is your fixed-price model different from the cost-plus model most Toronto builders use?
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.
What does it cost to build or renovate a home in Toronto?
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.
How long does it take to build a house in the GTA?
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.
Do you handle laneway or garden suites from start to finish?
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.
Are you licensed, and what protection does that give me?
Licensed by the HCRA and fully insured across every project, backed by our own seven-year structural guarantee.
What if I already have a design from an architect or designer?
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.
Which neighbourhoods and areas do you build in?
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.
Guides
What things cost, before you ask us
Start here
Let's start with the number.
Tell us what you are thinking about. We will come and see it, and you will have a scope and a price broken down line by line within 48 hours.
- A visit to the house, at a time that suits you.
- A scope and price broken down line by line, within 48 hours.
- No obligation to go any further than that.
Contact us (416) 920-6066