Basement renovation completed in Markham
118 basement renovation projects submitted this week in Markham

Basement Renovation
Markham

An damp basement in Markham is lost monthly income. Our local specialists design and build basements that generate rental income. Free quote within 24h.

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Why choose Basement Quotes Canada for your basement renovation in Markham?

Licensed & Insured Contractors

Every renovation partner is fully licensed, carries liability insurance, and has verified references in Markham.

100% Free Quote

No fees, no obligation. Compare up to 5 basement renovation quotes in Markham — completely free.

Waterproofing Expertise

Proper waterproofing is critical before finishing a basement. Our contractors in Markham assess and correct moisture issues first.

Code-Compliant Builds

All basement renovations — including legal suites — are built to code with proper permits in Markham.

Basement renovation services available in Markham

Underpinning

Basement underpinning to increase ceiling height in Markham. Structural engineering and permit included.

Basement Bathroom

New bathroom addition in your basement. Full plumbing rough-in, tile, fixtures and ventilation.

Basement Finishing

Full basement finishing in Markham — framing, insulation, drywall, flooring, lighting and trim. Turn unused space into living space.

Legal Basement Suite

Complete legal basement suite construction in Markham. Permits, egress, kitchen, bathroom, separate entrance — income-ready.

Home Theatre & Media Room

Custom home theatre and media room design and installation. Wiring, acoustics and custom millwork in Markham.

Basement Waterproofing

Interior and exterior waterproofing systems. Sump pumps, drainage membranes, crack injection in Markham.

Frequently asked questions — Basement renovation in Markham

How much does it cost to finish a basement in Markham?
A full basement finish in Markham typically costs $29330–$97769, depending on size, bathroom inclusion and finish level. A basic finish with no bathroom starts around $4888–$14665. Get 3–5 free quotes to compare.
How much does a legal basement suite cost in Markham?
A legal basement suite in Markham typically costs $14665–$48884, including permits, egress windows, kitchen, bathroom and separate entrance. Rental income of $1,500–$2,500+/month is common in larger Markham markets.
Do I need a permit to finish my basement in Markham?
Yes — basement finishing that includes electrical, plumbing or structural work requires permits in Markham. Legal suites require additional permits and inspections. Your contractor handles the permitting process.
How do I know if my basement has a moisture problem?
Signs of basement moisture in Markham: water stains, efflorescence (white powder on walls), musty odour, peeling paint, or visible mold. Our contractors assess moisture before any finishing work to prevent future damage.
How long does a basement renovation take in Markham?
A full basement finish in Markham takes 4–8 weeks. A legal suite with plumbing and permitting takes 8–14 weeks. Underpinning adds 2–4 weeks. Your contractor will provide a detailed schedule.

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Basement renovation prices in Markham — 2026

Estimates based on size, scope and finish level

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Full Basement Finish

Framing · Drywall · Flooring · Lighting · Bathroom

$29330 – $97769
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🏡

Legal Basement Suite

Permits · Egress · Kitchen · Bath · Full finish

$14665 – $48884
💧

Waterproofing

Interior/exterior membrane · Sump pump · Drainage

$4888 – $19553

🛁 Basement bathroom addition

$1955 — $7821

☔ Interior waterproofing system

$4888 — $19553

🌡️ Basement heating installation

$1955 — $7821

💡 Egress window installation

$1955 — $7821

Estimated prices for Markham. Get accurate, free quotes from our verified contractors.

Ready to renovate your basement in Markham?

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En savoir plus sur Markham

Markham — Wikipedia Consulter → Background on Markham: demographics, housing and rental market — key context for basement suite investments. CMHC — Canada Mortgage and Housing Corporation Consulter → Housing guidelines and secondary suite resources for homeowners in Markham.