Renovation Contractors in Markham
When it comes to home renovation Markham, no two homes are alike — from the heritage streets of Unionville to the newer communities of Cornell, Angus Glen and Berczy Village, each has its own character. GMC Construction Inc. has spent 15+ years working across all of them — kitchens, bathrooms, basements and whole-home renovations for Markham homeowners who want the job planned properly, priced honestly, and built to last.
What sets us apart in a crowded market: GMC is led by an owner who holds a Master’s degree in Structural Engineering. Before we quote a wall removal, a basement underpinning, or a second-storey addition, we understand how the house actually carries load — which is why our projects don’t run into the structural surprises that stall other renovations. It’s a structure-first approach no other Markham renovation company offers.
Our Renovation Services in Markham
Kitchen Renovations
Custom cabinetry, islands and full layout changes — from a heritage kitchen in Unionville to a gourmet layout in an Angus Glen estate.
Bathroom Renovations
Ensuites, main baths and powder rooms with proper waterproofing — the hidden work that makes a Markham bathroom last for decades.
Basement Renovations
Finished basements, legal secondary suites and multigenerational living space — a common request across Markham’s larger family homes.
Home Additions
Second-storey additions, rear extensions and garage conversions — the projects where the owner’s structural engineering education matters most.
Whole-Home Renovations
Complete transformations that modernize an older Unionville or Markham Village home top to bottom — one coordinated project, one point of contact.
Condo Renovations
Condo and townhome renovations across Markham Centre and the city’s newer developments — managed around board rules and building access.
Renovating in Markham: What to Know
Markham’s housing stock is unusually varied, and each type brings its own renovation realities. The heritage homes of Unionville and Markham Village are full of character but often need careful updating of layouts, wiring and plumbing — and any exterior work in a designated heritage area comes with additional review. The established homes of Milliken, Buttonville and Berczy are prime candidates for kitchen open-ups, basement suites and second-storey additions. The newer communities of Cornell, Cathedral, Wismer and Angus Glen are larger and more open, where the work is usually finishing basements, building custom kitchens, or adding an ensuite worthy of the home.
Markham also has a strong demand for legal secondary suites and multigenerational living space, reflecting the city’s family-focused communities. These projects involve proper permits and careful structural and drainage planning — exactly the kind of work a structure-first contractor gets right up front.
Do You Need a Permit to Renovate in Markham?
Renovation permits in Markham are issued by the City of Markham’s Building Standards Department, within the York Region framework. Cosmetic work — replacing cabinets, tile, fixtures and finishes in the same layout — generally doesn’t require a permit. But moving plumbing, altering electrical, removing a load-bearing wall, finishing a basement, adding a legal second suite, or building an addition typically do. Homes in Markham’s designated heritage districts, such as Unionville and Markham Village, may require additional heritage approval for exterior work. As a licensed contractor, GMC manages the permit process for you and works with a licensed professional engineer for any stamped structural drawings your project requires.
Why Markham Homeowners Choose GMC
Structure-first expertise
Led by an owner who holds a Master’s degree in Structural Engineering — so wall removals, additions and basement work are planned around how your home actually carries load. No other renovation company in Markham offers this.
Fixed-price quotes
A detailed, itemized fixed price after a free in-home consultation — the real number you’ll pay, not a low estimate that grows once the walls are open.
85+ five-star reviews
A 5.0-star rating across 85+ Google reviews, 500+ completed projects, and a written workmanship warranty on every job. Fully licensed and insured with WSIB coverage.
Local knowledge
From Unionville’s heritage homes to Angus Glen estates and Cornell’s newer builds, we know Markham’s neighbourhoods, heritage rules and the City of Markham permit process firsthand.
One clear schedule
You get a week-by-week timeline before work begins and daily communication throughout — so you always know what’s happening, and when you’ll have your home back.
One team, start to finish
From permits and structural planning to the final finishing touches, your whole project is managed by GMC through a single point of contact — no juggling separate trades or chasing subcontractors.
Recent Work Across Markham
From heritage kitchen updates in Unionville to finished basement suites in Cornell and full modernizations of Markham Village homes, our Markham projects share the same foundation: careful structural planning, a fixed price agreed up front, and finishes that hold up years later. Every project is managed start to finish by GMC — one team, one point of contact, one written warranty. Browse our recent projects to see the quality of our work.
Serving Markham & Nearby Communities
GMC Construction serves Markham and its neighbouring communities across York Region and the wider GTA:
- Richmond Hill
- Vaughan
- North York
- Toronto
- Aurora
- Newmarket
- Unionville
- Thornhill
- Stouffville
- Cornell
- Milliken
- Angus Glen
Ready to Renovate Your Markham Home?
Whether it’s a heritage kitchen in Unionville, a basement suite in Cornell, or a full renovation in Markham Village, GMC Construction is ready to help. Call us at 647-450-4466 or request your free, fixed-price quote — and we’ll walk your home with you and plan the project around how it’s actually built.
