Basement Renovations in Markham
Luxury basement finishing for Markham homes. Free 3D design, an itemized price that locks before you sign, a lifetime workmanship warranty and a written finish date that pays you $200 for every late day.
Get a Free EstimateSee our projectsBasement renovation in Markham, street by street
Newer communities like Cornell, Cathedraltown, Berczy and Wismer feature tall, dry basements built for finishing, while mature streets in Unionville, Milliken and Markham Village reward the moisture-first approach our crews build into every project.
Markham is also one of the GTA's strongest rental markets, and since provincial housing changes opened the door to up to three units on most urban lots, a registered basement suite here is both legal and lucrative. Whatever you start with, you end with finished square footage your family uses every week, and a number your Markham house carries at resale.
What we build in Markham basements
Basement finishing
Theatres, bars, gyms and family spaces. Wood studs with metal tracks and moisture-resistant drywall as standard, finished to match the rest of your home.
EXPLORE BASEMENT FINISHING →
Home renovations
Kitchens, bathrooms and whole-home updates for Markham families, built with the same crew and warranty as our basements.
EXPLORE HOME RENOVATIONS →
Structural & legal suites
Underpinning for ceiling height, waterproofing, and permitted separate entrances for legal Markham second suites.
EXPLORE STRUCTURAL WORK →Every basement is priced from the same quote sheet, line by line. Permit drawings, 3D design and the lifetime workmanship warranty are included.
An 832 sq ft spa basement on Sherwood Forest Drive
- Completed 2025
- 832 sq ft
- About 13 weeks
- $170,000 to $180,000
Compact footprint, high specification. A bedroom with a closet, a large bathroom with a custom tiled shower and wiring for a sauna, an L-shaped bar of 11 feet plus a return, laundry millwork and a 42-inch Napoleon linear fireplace. The project also included a bar and new staircase steps on the main level, which is why the contract sits above the usual range for this size.
What a basement in Markham costs, by scope
The same quote sheet we use everywhere in the GTA, line by line. Permit drawings, 3D design and the lifetime workmanship warranty are included.
| Scope | Price before HST |
|---|---|
| 600 sq ft with a three-piece bathroom | $56,000 |
| 800 sq ft with a three-piece bathroom | $62,000 |
| 1,000 sq ft with a three-piece bathroom | $67,800 |
| 1,200 sq ft with a three-piece bathroom and two bedrooms | $75,200 |
| 1,500 sq ft with a three-piece bathroom and two bedrooms | $83,700 |
| The family basement: media wall, full bathroom, laundry, around 1,000 sq ft | $60,000 to $85,000 |
| The entertainment build: theatre or media room, bar, gym, spa bathroom, 1,000 to 1,300 sq ft | $95,000 to $130,000 |
| Three-piece bathroom, added to a basement without one | $11,700 |
| Custom wet bar | +$15,000 |
| Home theatre setup | +$20,000 |
| Walkout entrance, permits included | $15,000 to $25,000 |
| Full-perimeter underpinning for low ceilings | $60,000 to $120,000 |
| Legal basement apartment, purpose-built | $75,000 to $110,000 or more |
Every basement is priced from the same quote sheet, line by line: a 1,000 sq ft basement with a three-piece bathroom comes to about $67,800 before HST, and the price per square foot falls as the basement grows because the permit, bin, breakers, stairs and bathroom cost the same at any size. Use the calculator to price yours. Cost guides: bathroom, walkout and underpinning.
A real basement we finished in Markham
Tap to watch the walkthrough: a 40-year-old basement fully gutted and rebuilt.
