Basement Finishing Cost in London (2026)
Average cost in London
$30,000 — $90,000
$35 — $80 per sq ft
Cost Breakdown
ItemizedFraming, drywall installation, carpentry, and general labor
40%
Lumber, drywall, flooring, trim, and paint
35%
Wiring, lighting, bathroom rough-ins, and fixtures
15%
Spray foam or batt insulation, ductwork extensions
7%
City of London building permits, inspections, and disposal
3%
HST at 13%
📋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
$26,340 — $39,510
Based on 8 sources and market data for London. Actual costs may vary depending on specific project requirements.
🏢Top Basement Finish Contractors in London
Verified providersPractical Solutions: Renovation and Handyman Services
65 Mark St, London, ON N5V 2G7, Canada
40 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
On average, finishing a 1,000 sq ft basement in London costs between $35,000 and $80,000. A basic open-concept finish typically costs around $35,000 to $50,000, while a mid-range to high-end remodel with a 3-piece bathroom ranges from $55,000 to $80,000+.
The cost per square foot generally ranges from $35 on the low end for simple cosmetic finishes to $80 or more for premium remodels involving custom cabinetry, egress windows, or structural changes.
Adding a new bathroom to a basement in London typically adds $10,000 to $25,000 to your total budget. If underground plumbing rough-ins are not already present, breaking and trenching the concrete floor will push costs toward the higher end of that range.
Yes, the City of London requires building permits for basement renovations that involve structural changes, plumbing, or electrical work. Permit and inspection fees typically range from $1,000 to $2,000 depending on the scope of the project.
📊Our Methodology
How we collect dataAggregated from 8+ 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: today. Updates run weekly. All costs in CAD.