Premium Renovation, Addition & Custom Home Builder in Toronto
Your home, built right.
Fixed price. No surprises.
Grand Design Build handles everything; design, materials, permits, build and warranty; all under one contract and with one team.
Renovation, Addition & Custom Build Services in Toronto
Grand Design Build is a full-service custom 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. So there’s one point of contact and one team accountable for the outcome of your dream home.
Whether you’re starting from an empty lot or working with an existing structure, our services are built around what your property actually needs.
Home Renovation
Full-home renovations, kitchen and bathroom remodels, and open-concept transformations.
Home Additions
Expand your living space. Rear additions, second storeys, and side extensions across the GTA.
Custom Build
Design-to-handover custom builds tailored to your lot, lifestyle, and budget. Fixed price from day one.
Design and Permits
In-house architectural design, permit applications, and zoning compliance across the GTA.
Laneway & Garden Suites
Design, permits, and construction for Toronto laneway and garden suites from start to finish.
Project Management
Dedicated project coordinators, progress tracking, and on-site supervision from ground break to handover.
Why You Should Build with Grand Design Build
Fixed price building contract
Most Toronto builders use a cost-plus model, where rising material costs and delays come out of your pocket. At Grand Design Build, your price is locked before we break ground. No hidden extras. No surprise invoices. Just a clear contract, a clear timeline, and a home that’s built the way we promised.
7 year structural guarantee
This is your project, and we want you to love it! We promise that you will not only love the process of building your project, but you will love the final product as well.
As one of the best home build and design experts in Toronto, we offer you a seven-year Structural Guarantee (Guarantee) on your new home.
HCRA insured & licensed
We are fully insured and licensed in accordance with all provincial and municipal regulations. This means every aspect of our work from structural construction to specialized trades is backed by the proper certifications and liability coverage. You can rest easy knowing that your project is protected, compliant, and managed by qualified professionals who meet the highest industry standards.
Recently Completed Design and Build Projects in Toronto
Every project we take on starts with a conversation and ends with a home that’s built to last.
We’ve completed 250+ projects across North York, Forest Hill, Rosedale, Yorkville, Etobicoke, and the GTA, earning the trust of Toronto homeowners through transparent pricing, disciplined project management, and craftsmanship that stands behind a 7-year structural guarantee.
What Our Clients Say About Our Services
4.9
Our Renovation, Addition and Custom Home Build Process
Complimentary Consultation
Set up a meeting within one business day. We will walk through your goals, take measurements, and review existing conditions. For larger projects we'll bring our designer and a structural estimator. This is free and carries no obligation.
Proposal & Scope
We produce a preliminary proposal, a detailed scope document, and a fixed-price structure broken down by line item. You know exactly what's included, what isn't, and what each component costs before you commit. Review it, ask questions, request changes, we'll rescope as needed.
Drawings & Permits
Our in-house architects and designers create your custom blueprints. We manage the entire City of Toronto permit application process, including architectural drawings, structural engineering, and navigating any required zoning variances.
Build & Inspections
We start building your dream home based on the approved designs and contract. Our team and municipal authorities conduct thorough inspections at every milestone to ensure full compliance with the Ontario Building Code and project specifications.
Handover & Warranty
The moment your vision becomes a reality. We conduct a final walkthrough to ensure your total satisfaction and seamlessly transition the new home into your possession, all backed by our 7-Year Structural Guarantee.
LICENCES
We are premier custom home builders and renovation contractors in Toronto, licensed by HCRA and fully insured for your protection.
Neighborhoods We Serve in Toronto and The GTA
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 neighborhoods:
- Central Toronto: Old Toronto, Downtown, Rosedale, Forest Hill, Bloor West Village
- North York:ย Bayview Village, Ledbury Park, Don Mills
- East York & Scarborough: East York, Leaside, Leslieville, The Beaches, Danforth Village, Cliffside
- Greater Toronto Area: Richmond Hill, Oakville, Eglinton West
FAQs
1. Does Grand Design Build handle everything from the initial architectural drawings to the final interior finishes?
Yes. We provide a complete “Design-to-Handover” service. This means we are your single point of responsibility for:
- Architectural & Structural Design: Creating plans that are both beautiful and buildable.
- Permit Navigation: Managing all city applications and zoning variances.
- Interior Design: Sourcing cabinetry, flooring, and lighting.
- Full Construction: Managing all trades, materials, and on-site labor until the day we hand you the keys.
2. How is your "Fixed-Price" model different from the "Cost-Plus" model used by most Toronto builders?
Most high-end builders use Cost-Plus, where you pay the actual costs of labor and materials plus a percentage fee. While this seems flexible, it places all the financial risk on you; if the builder is inefficient or material prices spike, your bill goes up.
At Grand Design Build, we use a Fixed-Price Guarantee for our defined scope. We do the hard work of estimating and sourcing before we break ground. This shifts the risk from your shoulders to ours. If a sub-trade raises their price or a task takes longer than expected, thatโs our responsibility to manage, not yours. You get budget certainty and peace of mind from the start.
3. Does "Fixed-Price" mean I can't make changes once the project starts?
Not at all. You can still customize your home as we build. If you decide to upgrade a finish or alter a layout, we simply use a formal Change Order. We provide you with the exact cost and timeline impact of that change for your approval before the work is done. This ensures your price remains under your control, even if your vision evolves.
4. How do you handle "Change Orders" if we decide to upgrade a finish mid-project?
We use a formal Change Order process. If you decide to upgrade a product or design once the construction has started, we provide a written quote for the cost and timeline difference. Work only proceeds once youโve signed off, ensuring there are no “surprise” invoices at the end of the month.
5. How long does it take to build a house in Canada?
A straightforward new build usually takesย 6โ12 monthsย once permits are in place. A full custom home can take closer toย 12โ18 monthsย because of design work and permitting. Weather, trades availability, and the complexity of the project all affect timelines.
6. How much does it cost to build a 2000 sq foot house in Ontario?
On average, new builds in Toronto run roughlyย $300โ$400 per square footย for a good-quality home. That means a 2,000 sq ft house might costย $600,000โ$800,000ย just for construction. Luxury custom homes with high-end finishes can go higher. Land, permits, design fees, and HST are extra.
7. Do you handle Laneway or Garden Suites from start to finish?
Yes. We specialize in maximizing property value through Torontoโs new housing bylaws. We handle the unique structural, utility, and permit requirements necessary to turn your underutilized backyard into a high-end, self-contained living space.
8. Do I need to move out during a major renovation or second-storey addition?
For full-home gut renovations or second-storey additions, we highly recommend moving out to ensure your safety and to speed up the construction timeline. However, for smaller localized renovations, we can often set up dust barriers and “clean zones” so you can remain in your home comfortably.
Get a fixed-price quote in 48 hours.
Tell us about your project. No commitment, no pressure; just a clear number in two business days.
Get in Touch
- 1558 Avenue Road, North York, ONย M5M 3X5
- (416) 920-6066
- info@granddesignbuild.com
๐๏ธ100% private. We never sell or share your information.
