Basement Finishing Cost in London (2026)
Average cost in London
$30,000 – $120,000
$30 – $120 per sq ft
In London, the average is $59,538 and most projects cost between $30,000 and $120,000, or about $30 – $120 per sq ft. Prices are before tax and based on 12 sources.
Cost Breakdown
ItemizedLicensed trades and general contracting
50%
Framing, drywall, flooring, and fixtures
35%
Municipal fees and BCIN-stamped drawings
5%
Buffer for unexpected structural or moisture issues
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 project
LiveYour estimate in London
Likely range $30,000 – $119,999
- Labor50%$29,769
- Materials35%$20,838
- Permits & Design5%$2,977
- Contingency10%$5,954
Basic (rec room)
$41,418
Standard (bedroom + bath)
$59,538
Premium (full suite)
$84,907
Calibrated to 12 researched sources for London. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$56,381
Today
$59,538
Basement Finishing in London is ↑ 5.6% compared to roughly a year ago — about $3,157 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 providersOak 42 | Home Renovations London, Ontario | Bathrooms, Kitchens, Basements, Additions
4093 Meadowbrook Dr #102, London, ON N6L 1G1, Canada
37 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 a building permit for any project that involves structural changes, new plumbing, or HVAC modifications. Municipal permit fees typically range from $300 to $1,500, plus professional drawing fees of $800 to $1,500.
According to the Ontario Building Code and London's 2026 guidelines, the minimum ceiling height must be 1.95 metres (approximately 6'5") over at least 75% of the required floor area.
A fully legal basement apartment with a kitchen, separate entrance, and fire separation typically costs between $85,000 and $150,000 in 2026, depending on whether underpinning is required to meet height standards.
Homeowners in London can expect a 70% to 75% ROI on a professionally finished basement. Adding a legal rental suite can further increase value by providing potential monthly income of $1,800 to $2,400.
📊Our Methodology
How we collect dataAggregated from 12+ 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: 1 months 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.