Basement Renovations in Markham
From large unfinished basements in Cornell, Cathedraltown, Berczy Village and Wismer to established homes in Thornhill, Milliken Mills and heritage Unionville, we finish Markham basements into family space and registered second units.
Why Markham Basements Need a Different Approach
A lot of Markham was built in the last thirty years, and many of those houses still have a basement that has never been finished. Cornell, Cathedraltown, Berczy Village, Wismer and Greensborough are full of big, dry poured basements with a builder rough-in for a bathroom, which makes them some of the most straightforward basements in the GTA to turn into a rec room, guest suite or rental unit.
Markham has its own process for second units. The City permits up to three units on a lot, and a basement apartment has to be registered through the fire department: $246 for registration plus a $429.50 inspection, with proof of insurance for a two-unit house and an electrical report. We build the unit so it passes the first time and prepare the paperwork the registration asks for.
Older Markham is a different job. Homes in Thornhill, Milliken Mills and Markham Village are often finished already, with dated systems behind the walls, and heritage houses in Unionville and along Main Street Markham can have lower basements and older foundations. We assess ceiling height, moisture and wiring first, then design around what we find. Markham projects are run from our Richmond Hill office.
- Licensed & insured contractors
- Transparent, itemized pricing
- Permits & approvals handled for you
- On-time delivery, every project
Basement Renovations We Do in Markham
Every kind of Markham basement, from a family rec room to a registered rental unit.
First-Time Basement Finishing
Turning the unfinished basements under Cornell, Cathedraltown and Wismer homes into finished living space.
Registered Second Units
Legal basement apartments built to the Building Code and registered with Markham Fire and Emergency Services.
Multigenerational Suites
Private suites for parents or grandparents, with their own bathroom and kitchenette.
Rec Rooms & Home Offices
Family rooms, playrooms and quiet offices with proper lighting, insulation and sound control.
Basement Bathrooms
Finishing the builder rough-in, or cutting new drains into the slab where none exists.
Older Basement Updates
Stripping and rebuilding dated basements in Thornhill, Milliken Mills and Markham Village.
What Makes a Markham Basement Different
These are the things that actually decide the cost, timeline and legality of a basement project in Markham.
Fire Registration
Markham registers second units through the fire department: $246 plus a $429.50 inspection.
Insurance & Electrical Report
Registration needs proof of two-unit insurance and an electrical report, so we plan the electrical work around it.
Unfinished Newer Basements
Many newer Markham basements have never been touched, which keeps demolition and surprises to a minimum.
Builder Rough-Ins
Using an existing bathroom rough-in can save thousands compared with cutting the slab.
Heritage Unionville
Older Unionville and Markham Village homes can have lower ceilings and older foundations. We measure and test first.
Flood Protection
In flood-prone areas Markham pays up to $1,750 for an indoor backwater valve and $5,000 for weeping tile and sump work.
What a Basement Renovation Costs in Markham
Our basement finishing starts at $55 per square foot, and legal basement apartments at $80 per square foot. Most standard basement finishes we quote land between $50,000 and $90,000, covering framing, insulation, drywall, flooring, lighting and often a bathroom. A legal basement apartment typically runs $80,000 to $175,000, because it adds a kitchen, fire and smoke separation, interconnected alarms, code-compliant windows and exits, and the permits and inspections. A new basement bathroom starts at around $20,000.
A first-time finish in a newer Markham basement is usually at the efficient end of these ranges, because there is little to demolish and the rough-ins are already in place. A legal unit adds a kitchen, separation and alarms, the registration requirements, and often a new entrance. Older and heritage basements that need waterproofing or more height cost more. We give you an itemized estimate after we measure.
Markham Neighbourhoods We Serve
We finish basements right across Markham, from historic Unionville to the newest communities in the north and east.
Our Simple 5-Step Process
From first call to final inspection, we make finishing your Markham basement clear and stress-free.
Reach Out
Call us or fill out our quick form to tell us about your basement.
Free Consultation
We visit your home, measure the ceiling height, check for moisture and talk through layout, budget and timeline.
Detailed Estimate
You receive a transparent, itemized estimate within 2 to 3 business days.
Review & Refine
We walk through the proposal together until you are fully confident.
Sign & Start
We lock in your start date and handle scheduling, permits and coordination.
Recent Basement Renovations
A look at basements we have finished for homeowners across Toronto and the GTA.
Markham Basement Renovation FAQs
How much does it cost to finish a basement in Markham?
Do I need to register a basement apartment in Markham?
How many units can I have on a Markham lot?
Can you use the bathroom rough-in in my basement?
Which office serves Markham?
Ready to Finish Your Markham Basement?
Book a free consultation. We will measure the ceiling, check for moisture and tell you what your basement can legally become and what it will cost.
Serving Markham from our Richmond Hill office — 155 West Beaver Creek Rd #3, Richmond Hill, ON L4B 1E1 · All Markham renovation services