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, Cliffcrest
- Greater Toronto Area: Richmond Hill, Oakville, Eglinton West
FAQs
1. Does Grand Design Build handle everything from initial architectural drawings to 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 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. It can look flexible, but it places the financial risk on you; if a trade runs over or material prices move, the difference lands on your invoice. Grand Design Build prices the full defined scope before we break ground. We do the estimating and sourcing up front, so if a cost shifts during construction, that is our risk to manage, not yours. You get budget certainty and peace of mind from the start.
3. Can I still make changes once the project starts, and how do you handle them?
Yes, you can still customize your home as we build. If you decide to upgrade a finish or adjust a layout, we issue a formal change order with the exact cost and timeline impact before any work begins. Nothing proceeds without your written sign-off, so the price stays under your control even as the project evolves and no invoice ever arrives as a surprise.
4. 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. Weather, trade availability, and the complexity of the project all affect the schedule, which is why we walk through a realistic timeline with you before any contract is signed.
5. What does it cost to build or renovate a home in Toronto?
Cost depends on lot conditions, square footage, finish level, and scope, so a single number rarely applies to two projects the same way. What we can offer is a detailed, itemized quote within 48 hours of our first conversation, broken down line by line so you know exactly what is included before you commit to anything. See how we break down build costs in Toronto.
6. Do you handle laneway or garden suites from start to finish?
Yes. We manage the structural, utility, and permit requirements specific to Toronto’s laneway and garden suite bylaws, from initial design through to final construction, so an underused backyard becomes a fully self-contained living space without you having to manage multiple contractors.
7. Do I need to move out during a major renovation or addition?
For full-home renovations or second-storey additions, we generally recommend moving out, both for your safety and to keep the timeline moving efficiently. For smaller, localized renovations, we can often set up dust barriers and clean zones so you can stay in your home comfortably throughout construction.
8. Are you licensed, and what protection does that give me?
Grand Design Build is licensed by the HCRA (Home Construction Regulatory Authority)and carries full insurance across every project. That means your build is backed by our own seven-year structural guarantee.
9. Which neighbourhoods and areas do you build in?
We work across the GTA, 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. If you don’t see your area listed, ask; we take on projects across most of the Greater Toronto Area.
10. What's the difference between a renovation, an addition, and a custom build, and how do I know which one I need?
A renovation reworks your existing space, from a single room to a full gut. An addition adds new square footage to your current home, whether that’s a rear extension or a second storey. A custom build starts from the ground up, either on a vacant lot or after a full teardown. If you’re not sure which applies, that’s exactly what the complimentary consultation is for; we’ll assess your property and tell you what’s actually possible before recommending a direction.
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
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