Legal Basement Apartment Builder in Markham, ON
Understanding What’s Actually Permitted Before You Build
Markham’s second suite rules are more specific than in most neighbouring cities — we assess what’s genuinely achievable on your property before any design work begins.
Legal Basement Apartments in Markham
As a basement finishing contractor, we start every Markham project by confirming exactly what your specific property is eligible for — whether that’s a fully compliant second suite, a grandfathered existing unit, or a premium personal-use space instead. Second suites are not broadly permitted across the city; they’re currently allowed only in specific zoned areas or where a unit legally existed before November 16, 1995, so we give you a straight answer rather than assuming Markham works like Vaughan or Richmond Hill. See our Legal Basement Apartments & Basement Finishing page for our full process.
Why Markham Homeowners Choose Modinno
Because Markham’s rules differ from most of the GTA, getting an honest answer about what’s actually permitted matters more here than almost anywhere else. Homeowners choose us because we tell you clearly what’s achievable before you invest in design.
Honest eligibility assessment
We confirm whether your property qualifies under a permitted zone or grandfathered exception before proposing any design.
Full code and registration compliance
Where a second suite is achievable, it’s built to the Ontario Building Code, Fire Code, and City registration requirements.
One accountable team
Assessment, permits, and construction under a single contract, with no gaps between design and build.
Premium alternatives
When a suite isn’t achievable If a legal rental suite isn’t currently permitted on your property, we design an equally high-quality personal-use space instead.
How We Assess Feasibility for Markham Basement Apartments
We check whether your property falls within a specifically zoned exception or qualifies as a pre-1995 grandfathered unit before proposing anything — this is genuinely the deciding factor in Markham, unlike most surrounding cities. Where a second suite is achievable, we register it with the City and build it to the Ontario Building Code and Fire Code; where it isn’t yet, we track Markham’s proposed policy expansion so we can tell you the moment it changes, and in the meantime design an equally well-built personal-use space instead.
Frequently Asked Questions
Is a basement apartment legal in Markham?
We assess your specific property’s eligibility as the first step of any project — second suites are currently prohibited on most Markham properties except in specific zoned areas or where a suite legally existed before November 16, 1995.
Is Markham changing its rules to allow more basement apartments?
We monitor this closely and confirm current status before any project — the City has been considering broader changes following a 2023 Council resolution, but it hasn’t been adopted as a final by-law yet.
What if my property doesn’t qualify for a legal second suite in Markham?
We can design an equally high-quality personal-use space instead — a home theatre, gym, in-law living area, or recreation room — finished to the same standard as any legal suite we build.
Does my existing pre-1995 basement apartment still need anything done to it?
Yes, and we can assess it for you — even a grandfathered unit must be registered with the City and meet current building and fire safety code requirements.
Get a Clear, Honest Answer for Your Markham Basement.
Feasibility-first. Fully compliant. Built by one accountable team.