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Garage conversions on Markham homes
Markham's subdivisions from the 1990s and 2000s, Unionville, Cornell, Cathedraltown, Berczy Village, were built to a fairly consistent two-storey template, and that template usually puts a bedroom over the garage. That's the majority condition we engineer for here. This page covers the beam, the York Region permit process, and what a double garage door costs when you don't need the full conversion.
What Markham's housing stock means for the job. Markham's growth is concentrated in two building waves: the 1990s master-planned communities like Unionville and Milliken, and the 2000s-era neighbourhoods like Cornell and Cathedraltown. Both waves favoured a consistent two-storey layout with a bedroom or family room built directly over the garage, which is the majority configuration for a two-to-one conversion in this city. The beam in these homes carries a redesigned load path, not just the roof, so most Markham conversions are priced individually at the free assessment rather than the standard band.
We take on conversions across Markham, including Unionville, Cornell, Cathedraltown, Berczy Village, Milliken and Angus Glen.
Double garage door installation in Markham
We install double garage doors in Markham two ways: as the final step of every two-to-one conversion, and as standalone replacements where the wide opening already exists. They are different jobs with different price tags, and it pays to know which one you need before collecting quotes.
If your Markham garage already has one opening sized for a double door, you need an installation or replacement: a non-structural job, no permit, typically a few thousand dollars. If you have two separate single doors with a post between them, widening that into one opening is structural work: an engineered beam, a building permit, and masonry reinstatement, which is the conversion this page describes. Typical replacement ranges are on the Ontario cost guide.
What a conversion costs in Markham
$16,000 – $18,000
CAD, all-in · bump-out or detached garage · nothing load-bearing above the opening
The range covers the structural assessment and engineering, centre post removal, the engineered beam, exterior finishing, and a custom-width double door, in one contract. The municipal permit fee, typically a few hundred dollars, is extra. A room above the garage changes the beam design and is priced at the free assessment, never guessed at.
The permit: structural widening in Markham is permitted through the City of Markham (York Region). We prepare the application with stamped engineering drawings, file it, and carry the inspections. The full breakdown of what moves the number is on the cost guide.
How the conversion runs
Every Markham conversion follows the same fixed sequence, engineered around the load, not guessed at:
- Structural assessment
- Engineered beam design
- Building permit filing
- Temporary support and centre-post removal
- Beam and header installation
- Framing
- Exterior finishing
- Custom-width door and opener install
The full 8-step process, with the beam engineering and the permit table, is on the two garage doors into one conversion guide.
A representative Markham project profile
This is a representative profile of the structure type we most often see in Markham, not a specific completed job. For how each structure type runs, see our projects page.
Representative profile — Two-storey home, bedroom above the garage
- Structural assessment and stamped engineered beam design for the load above
- Municipal building permit and inspections
- Centre post removal with temporary support in place
- LVL beam sized for the redesigned load path
- Exterior reinstatement to match the facade
- 16'8" or wider custom-width double door with opener and spring upgrade
Where we work in Markham
Markham questions, answered plainly
Why does a Markham garage conversion usually cost more than the $16,000–$18,000 CAD band?
Most Markham subdivisions, from 1990s Unionville to 2000s Cornell and Cathedraltown, put a bedroom directly over the garage. That redesigns the load path the beam has to carry, which is priced individually at the free assessment rather than the standard band that applies only where nothing sits above the opening.
Which municipality issues my building permit in Markham?
The City of Markham, a York Region lower-tier municipality, issues the permit and inspects the structural work. We prepare the stamped engineering drawings and file the application.
I just need a double garage door installed in Markham — is that the same job?
No. Installing a double door into an opening that's already the right width is a standard door installation, no permit and no beam work. The two-to-one conversion is only for homes starting with two separate single doors and a centre post.
Are two single garage doors common on Markham homes?
Yes, especially in the two-storey subdivisions built through the 1990s and 2000s, where twin single doors with a centre post were the standard builder layout across Unionville, Cornell, and similar communities.
How long does the permit review take in Markham?
Ontario's Building Code requires a decision within 10 business days once your application is complete, and that timeline applies the same way in Markham as anywhere else in York Region. We file the stamped drawings up front to avoid revision delays.
Nearby service areas
The same one-contract conversion runs across the GTA. We also serve Etobicoke, Richmond Hill and Oakville.
Ready to convert your two garage doors in Markham?
Answer a few questions and get your candidate status plus a project range. Photos can follow by text.
Prefer to talk? Call or text (416) 555-0000.