Basement renovation completed in Westmount
13 basement renovation projects submitted this week in Westmount

Basement Renovation
Westmount

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

Licensed & Insured Contractors

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

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

Waterproofing Expertise

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

Code-Compliant Builds

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

Basement renovation services available in Westmount

Basement Bathroom

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

Home Theatre & Media Room

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

Underpinning

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

Basement Waterproofing

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

Basement Finishing

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

Legal Basement Suite

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

Frequently asked questions — Basement renovation in Westmount

How much does it cost to finish a basement in Westmount?
A full basement finish in Westmount typically costs $20912–$66540, depending on size, bathroom inclusion and finish level. A basic finish with no bathroom starts around $3327–$9505. Get 3–5 free quotes to compare.
How much does a legal basement suite cost in Westmount?
A legal basement suite in Westmount typically costs $9505–$33270, including permits, egress windows, kitchen, bathroom and separate entrance. Rental income of $1,500–$2,500+/month is common in larger Westmount markets.
Do I need a permit to finish my basement in Westmount?
Yes — basement finishing that includes electrical, plumbing or structural work requires permits in Westmount. 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 Westmount: 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 Westmount?
A full basement finish in Westmount 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 Westmount — 2026

Estimates based on size, scope and finish level

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Full Basement Finish

Framing · Drywall · Flooring · Lighting · Bathroom

$20912 – $66540
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🏡

Legal Basement Suite

Permits · Egress · Kitchen · Bath · Full finish

$9505 – $33270
💧

Waterproofing

Interior/exterior membrane · Sump pump · Drainage

$3327 – $13308

🛁 Basement bathroom addition

$1425 — $5703

☔ Interior waterproofing system

$3327 — $13308

🌡️ Basement heating installation

$1425 — $5703

💡 Egress window installation

$1425 — $5703

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

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