Basement Finishing Cost in Oshawa (2026)
Average cost in Oshawa
$25,000 — $75,000
$40 — $100 per sq ft
Cost Breakdown
ItemizedSkilled trades, framing, and general labor
40%
Drywall, flooring, paint, and fixtures
35%
Plumbing, electrical, and HVAC rough-ins
15%
Building permits, inspections, and design
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
$28,356 — $42,534
Based on 6 sources and market data for Oshawa. Actual costs may vary depending on specific project requirements.
🏢Top Basement Finish Contractors in Oshawa
Verified providersBuilding Problems Solver Inc.
745 Downview Crescent, Oshawa, ON L1H 7W4, Canada
23 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, any basement finishing in Oshawa that involves framing, electrical, plumbing, or HVAC changes requires a building permit. In the Durham Region, permit fees typically range from $800 to $2,500 depending on the scope of work.
Adding a 3-piece or 4-piece bathroom to your basement typically costs between $8,000 and $18,000. This is often considered the highest ROI single item for a basement renovation.
In 2026, Oshawa homeowners can expect to pay between $35 and $50 per square foot for a basic finish, $65 to $80 for a mid-range finish with a bedroom and bathroom, and $80 to $100+ per square foot for premium builds.
Creating a legal secondary suite with a separate entrance, kitchen, and bathroom is a major investment, often adding $50,000 to $100,000 to the total cost, but it significantly increases the property value and provides rental income.
📊Our Methodology
How we collect dataAggregated from 6+ 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.