Basement Renovation in Oakville, Ontario
MyAurora plans and builds finished basements and legal basement suites for Oakville homeowners, from family rooms in newer north Oakville homes to basement apartments in established neighbourhoods. We coordinate the drawings, the permit and every inspection. Licensed and insured, WSIB-covered, with written quotes and clear timelines.
Basement apartment with white kitchen cabinets, stainless appliances and light wood flooring.
Oakville basement rules at a glance
| Rule | Oakville |
|---|---|
| Finishing a basement for your own use | Building permit required |
| Basement bedroom | Egress window or door required |
| Adding a bathroom or other fixture | Water service sizing form required |
| Minimum building permit fee | $200 |
| Basement apartment ceiling height (Ontario Building Code) | 1.95 m, 1.85 m under beams and ducts |
Basement renovation services in Oakville
- Basement finishing for family rooms, home offices, gyms, playrooms and guest bedrooms.
- Legal basement apartments (additional residential units) built to the Ontario Building Code, with fire separation, interconnected smoke and CO alarms and proper egress.
- Basement bathrooms and kitchenettes, coordinated with permitted plumbing and drainage.
- Separate entrances and egress windows, planned with the permit drawings.
- Insulation, framing, drywall, flooring and lighting, with electrical by a licensed electrician under an ESA permit.
- Soundproofing between the basement and the main floor.
Basement renovation cost in Oakville
| Project type | Typical cost (before HST) |
|---|---|
| Finished basement for your own use | $35,000 - $60,000 |
| Legal basement apartment (secondary unit) | $60,000 - $90,000+ |
The biggest cost drivers are size, whether you add a bathroom or kitchen, ceiling height, moisture or foundation repairs, a new side entrance or egress window, and upgrades to heating, ventilation and the electrical panel. Try our basement renovation calculator for a quick estimate, then book a site visit for a written quote.
Oakville basement permits and legal suite rules
The Town of Oakville requires a building permit to finish or renovate a basement, even for personal use. If you add a bedroom, the basement needs an egress window or door. If you add a bathroom, wet bar or other plumbing fixture, Oakville asks for a water service calculation form to confirm your water service can handle the extra load. The minimum building permit fee is $200.
A separate unit is called an accessory apartment. It needs a bedroom, kitchen, living area, washroom and access to laundry (combined spaces are allowed). Two additional units can be added to a single, semi-detached or townhouse without development charges, and the Town has proposed allowing up to four units on single detached lots, so check the current rules for your address.
Province-wide, the 2024 Ontario Building Code sets the minimum ceiling height for a secondary suite at 1.95 m (1.85 m under beams and ducts), and requires interconnected smoke alarms between units. For the full step-by-step, read our legal basement apartment guide.
Basements in Oakville homes
Oakville basements vary widely. Newer homes in north Oakville often have good ceiling height and rough-ins, while older homes can have lower ceilings, older ductwork and drainage that need more planning. We check ceiling height, egress options and moisture first, because those decide the cost.
How we build your basement
- Site visit. We measure, check ceiling height, moisture, egress options and the electrical panel, and talk about how you will use the space.
- Written quote and design. You get a clear scope, price and timeline before anything starts.
- Drawings and permit. We prepare or coordinate permit drawings and apply for the building permit.
- Construction and inspections. Framing, plumbing, electrical, insulation and fire separation are inspected at each stage before we close the walls.
- Finishes and handover. Drywall, flooring, trim, paint and fixtures, a final walkthrough and the final inspection.
Neighbourhoods we serve in Oakville
We work across Oakville, including:
- Glen Abbey
- Bronte
- West Oak Trails
- River Oaks
- Palermo
- Iroquois Ridge
- Joshua Creek
- Clearview
- College Park
- Kerr Village
- Uptown Core
- Old Oakville
Real Google Reviews from MyAurora Clients
MyAurora is rated 5.0 from 20 Google reviews, mostly from fencing and repair clients in Milton and Mississauga. Same owner-led team, clear written quotes and clean job sites on every project.
"MyAurora Inc. saved the day after a so-called professional botched my drywall. Jas was very patient, cut out and replaced the drywall and plastered it so nicely."
Abbie A. - Drywall repair
"Very professional job! The guys were quick, very accurate and most importantly know how to stay within the quote budget."
Asror A. - Google review
"He took the time to meet with the neighbors and answer ALL our questions. He was patient with all of us and was keen on walking us through the project."
Andrew M. - Fence project
"The quality and workmanship were excellent, and everything was completed professionally and on time."
Aaron R. - Fence project
Get a free basement quote in Oakville
Tell us your address, how you want to use the basement and send a few photos. We reply with next steps and book a site visit.
Call or WhatsApp 437-985-2935 Estimate with the calculatorEmail: info@myauroras.com
Basement renovation FAQ for Oakville
Do I need a permit to finish a basement in Oakville?
Yes. The Town of Oakville requires a building permit to finish or renovate a basement, even for personal use. The minimum building permit fee is $200.
Does a basement bedroom need an egress window in Oakville?
Yes. If you add a basement bedroom in Oakville, the basement requires an egress window or door.
Is a basement apartment legal in Oakville?
Yes, if your property's zoning allows it and the unit is built under a building permit to the Ontario Building Code. An accessory apartment needs a bedroom, kitchen, living area, washroom and laundry access.
How much does a basement renovation cost in Oakville?
A finished basement for your own use typically costs $35,000 to $60,000 before HST, and a legal basement apartment conversion typically costs $60,000 to $90,000 or more. Older homes with low ceilings or moisture issues cost more.
What ceiling height do I need for a basement apartment?
Under the 2024 Ontario Building Code, a secondary suite can have a ceiling height of 1.95 m, with at least 1.85 m clear under beams and ducts.
Are there development charges for a basement apartment in Oakville?
The Town says two additional units can be added to a single, semi-detached or townhouse without development charges.
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Permit and by-law details are summarized from Town of Milton, Town of Oakville, City of Mississauga and Ontario Building Code sources and can change. Confirm current rules for your property before building. Prices are typical ranges and not a quote.