Basement Finishing Cost in London (2026)
Average cost in London
$30,000 — $120,000
$30 — $120 per sq ft
Cost Breakdown
ItemizedFraming, electrical, plumbing, and finishing
40%
Drywall, flooring, lumber, and fixtures
45%
Municipal fees and BCIN-stamped drawings
5%
Buffer for moisture or structural surprises
10%
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 11 sources and market data for London. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$49,837
Today
$52,628
Basement Finishing in London is ↑ 5.6% compared to roughly a year ago — about $2,791 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 London
Verified providersPractical Solutions: Renovation and Handyman Services
65 Mark St, London, ON N5V 2G7, Canada
43 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
Yes. The City of London requires permits for any project involving structural changes, new plumbing, or electrical work. In 2026, the minimum permit fee is $260.37, though total municipal fees for a full basement typically range from $300 to $1,500.
For a standard contractor-led project, expect to pay $30–$50 for a basic finish, $50–$75 for mid-range (including a bathroom), and $80–$120+ for luxury finishes or legal rental suites.
A legal secondary dwelling unit in London typically costs between $50,000 and $150,000 in 2026. This includes required fire separations, a separate entrance, and a full kitchen, but can generate $1,200–$2,000 in monthly rental income.
A professionally finished basement in the London market currently recoups approximately 70% to 75% of its cost immediately upon resale, making it one of the highest-value home improvements.
📊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: 3 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.