Basements, Additions & Outdoor · Oshawa
Basement Finishing in Oshawa
Unfinished or dated basements turned into warm, dry family rooms, offices, gyms and guest suites.
- Free Written Quotes
- Permit Guidance
- One Point of Contact
- 36 Ontario Communities
Oshawa, Durham Region
Basement Finishing in Oshawa
Oshawa basements vary a lot, from older foundations that need careful moisture work to newer poured basements ready to finish. We plan each one around the house it is in.
Every Oshawa basement we finish starts with a moisture check, then proper foundation insulation, framing, electrical and plumbing, drywall, below-grade flooring and lighting, with egress windows wherever a bedroom is planned.
Building permits for basement finishing in Oshawa are issued by the City of Oshawa. We tell you up front whether your project needs one, prepare or coordinate the drawings, and book the inspections so the work is signed off properly.
Call (647) 424-1511 or send the form on this page for a free basement finishing quote in Oshawa. Tell us what you want to change, add a few photos of the space, and we will book a visit and send a written quote that lists the scope, the materials, the permits involved and the schedule.
Oshawa homes
What basement finishing involves in Oshawa's houses
Century and heritage homes in Oshawa
Basements in Oshawa's older homes often have stone, rubble or block foundations and low ceilings. They can be finished, but insulation has to suit the foundation so moisture is not trapped, and gaining height means underpinning or a bench footing, designed by an engineer and covered by a permit.
Post-war bungalows and back-splits in Oshawa
Post-war Oshawa bungalow basements are usually a single open space with the furnace in the middle and a side door at grade. They finish well, but ceilings are often low, so bulkheads around ductwork are planned carefully, and old clay weeping tile and foundation cracks are checked before anything is framed.
Newer homes built since 2000 in Oshawa
Newer Oshawa basements are usually poured concrete with a bathroom roughed in, so they are among the easiest to finish. We check the builder's drainage and the grading around the house, which often settles in the first years, then insulate, frame and finish with the bathroom placed where the rough-in allows.
Rules in Oshawa
Permits and approvals for basement finishing in Oshawa
Building permits
Building permits in Oshawa are issued by the City of Oshawa. Electrical work anywhere in Ontario is done by a licensed electrical contractor under an Electrical Safety Authority (ESA) permit. We confirm what your project needs before you sign and book every inspection.
Testing before demolition
Homes built before the 1990s can contain asbestos in plaster, textured ceilings, floor tile, vermiculite insulation and pipe wrap, and homes from before the 1960s often have lead paint. In Oshawa's older houses we test suspect materials before demolition and handle them by the regulations if they are found.
The service
Basements Finished Warm, Dry and Bright
A finished basement is often the most affordable way to add real living space to a home: a family room, a home office, a gym, a guest suite or a playroom. The difference between a basement that feels like part of the house and one that feels like a basement comes down to moisture control, insulation, lighting and ceiling height.
Before framing, we look for signs of water and fix the cause first. Then we insulate the foundation walls properly, frame, run electrical and plumbing, add pot lights, and finish with drywall, flooring suited to below-grade spaces, trim and paint. Many basements also get a bathroom, a wet bar or a laundry room.
More about basement finishing →The process
How your Oshawa project comes together
01
Consultation
Tell us what you want to change and send a few photos. We visit, measure and talk through options.
02
Written Quote
A clear scope, materials, permits and schedule, in writing. No vague allowances.
03
Permits & Planning
Drawings, permits and material orders lined up before demolition starts.
04
Build & Walk-Through
Work done in the right order, inspected where required, and walked through with you at the end.
Across Oshawa
Basement Finishing throughout Oshawa
Oshawa has older homes around downtown and the original auto-plant neighbourhoods, post-war bungalows across the south and east, and newer subdivisions in Windfields, Taunton and Northglen near Durham College and Ontario Tech University.
Questions
Basement Finishing in Oshawa: FAQs
How do I get a basement finishing quote in Oshawa?+
Call (647) 424-1511, use the form on this page or email info@ontariorenovationcompany.com. Tell us what you want to change and send a few photos, and we will book a visit and send a written quote for your Oshawa project.
What kinds of Oshawa homes do you work on?+
All of them. Housing in Oshawa includes century and heritage homes, post-war bungalows and back-splits and newer homes built since 2000, and each comes with its own considerations, from older wiring and foundations to builder warranties, septic systems and shoreline rules. We plan the work around the house you actually have.
Do I need a permit to finish my basement?+
In most Ontario municipalities, yes, particularly for new walls, bathrooms and bedrooms. A permit also protects you when you sell. We confirm the requirements and handle the application.
What if my basement has had water in it?+
We find and fix the cause first, whether that is grading, downspouts, a crack in the foundation or a plumbing issue. Finishing over an unresolved water problem just hides it.
Can you add a bedroom in the basement?+
Yes, as long as it has an egress window or exit that meets the Building Code, plus proper smoke and carbon monoxide alarms. We can enlarge an existing window opening if needed.
What flooring works best in a basement?+
Luxury vinyl plank is the most popular choice because it handles moisture and feels warmer underfoot than tile. We check the slab for moisture before recommending a product.
Do you offer basement finishing across Oshawa?+
Yes. We work throughout Oshawa, including Downtown Oshawa, Lakeview, Eastdale, McLaughlin, Northglen, Taunton and Windfields, and in nearby Courtice, Ajax, Bowmanville, Pickering and Newcastle.
More renovation services in Oshawa
Alongside basement finishing, we also handle legal basement apartments, bathroom renovations and flooring installation in Oshawa, so related work can be planned together.
Other basements, additions & outdoor services in Oshawa: legal basement apartments, garden suites & detached adus, home additions and decks & outdoor living.
Further reading
Your Oshawa renovation, done properly.
Tell us what you want to change and send a few photos. We will book a visit and send a clear written quote, with no obligation.