Basement Finishing Cost in Montreal (2026)
Average cost in Montreal
$30,000 — $145,000
$70 — $110 per sq ft
Cost Breakdown
ItemizedFraming, drywall, taping, and painting
45%
Flooring, lumber, insulation, and trim
35%
Electrical, plumbing, and HVAC upgrades
15%
City of Montreal fees and architectural plans
5%
GST+QST at 14.98%
📋What's Included
ScopeTypically Includes
- Framing & drywall
- Basic flooring (LVP or carpet)
- Electrical (outlets & lighting)
- Egress window (if required)
- Painting
- Basic bathroom rough-in
Typically Excludes
- Full basement bathroom
- Built-in bar or kitchen
- Home theater wiring
- Waterproofing (separate cost)
- Permits & inspections
Assumes an unfinished basement with existing concrete floor and basic utilities.
🧮Estimate Your Cost
InteractiveEstimated Cost
$25,584 — $38,376
Based on 9 sources and market data for Montreal. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$60,555
Today
$68,125
Basement Finishing in Montreal is ↑ 12.5% compared to roughly a year ago — about $7,569 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Basement Finish Contractors in Montreal
Verified providersRénovation Centrale , Central Renovation
1255 R. du Square-Phillips Ste 412, Montreal, QC H3B 3G1, Canada
233 reviews
Universal Renovations inc
2353 Rue John Campbell, LaSalle, QC H8N 1C5, Canada
63 reviews
DCR Renovation & Construction Montreal
3422 Bd Décarie, Montréal, QC H4A 3J5, Canada
585 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
In 2026, the Ville de Montréal charges a permit fee of $9.80 for every $1,000 of estimated work value. For a typical $72,500 renovation, the permit fee would be approximately $710.50, plus a minimum processing fee of $167.40.
The current average cost ranges from $70 to $110 per square foot. Basic finishing (drywall and flooring) starts at $70, while mid-range projects including a bathroom typically average $85 to $95 per square foot.
Adding a full 3-piece bathroom (shower, toilet, vanity) typically costs between $15,000 and $25,000. If the concrete slab needs to be broken for new plumbing rough-ins, expect to add $3,000 to $8,000 to that total.
A legal rental suite requires fire-rated separations and egress windows. Egress window installation costs between $2,500 and $4,500 per window, and total costs for a legal suite often exceed $100,000 or roughly $100 per square foot.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 2 weeks ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.