In short
Aelia Construction and Design finishes basements in Ottawa, including family rooms, offices, guest suites and bathrooms. The City of Ottawa requires a building permit to finish a basement, and we identify permit needs at the estimate stage. Estimates are free and written.
Reviewed October 2026
Our basement finishing services in Ottawa help homeowners transform unfinished or underused basements into comfortable and functional living spaces. We provide complete basement renovation solutions for home offices, entertainment rooms, guest suites, family rooms, and more, with a focus on quality workmanship, safety, and long-lasting results.
A finished basement adds living space without adding to the footprint of your house. Aelia Construction and Design finishes basements in Ottawa for family rooms, home offices, gyms, guest suites and rental-ready layouts.
Basements need more planning than upstairs rooms: moisture, ceiling height, heating and cooling, fire safety and exits all matter. We start with an assessment of what you have, then frame, insulate and finish the space so it is comfortable year round.
What our Basement Finishing service includes
- Layout and design planning
- Moisture and condition check before framing
- Framing, insulation and vapour control
- Electrical, lighting and potlights (by licensed trades)
- Drywall, taping and painting
- Flooring suited to below-grade spaces
- Bathrooms, wet bars and laundry rough-ins
- Doors, trim, stairs and egress windows
Our Basement Finishing projects
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How your project works
- 1
Assessment and goals
We inspect the basement, discuss how you want to use it, and note any moisture, ceiling height or mechanical issues.
- 2
Plan and estimate
You receive a layout and a written estimate. We identify permit needs at this stage.
- 3
Framing and rough-ins
Walls, insulation, electrical, plumbing and ductwork are completed and inspected where required.
- 4
Drywall and finishes
We hang, tape and sand drywall, then paint, install flooring, trim and fixtures.
- 5
Final walkthrough
We review the finished space with you and complete any touch-ups.
What affects the cost
Every home and project is different, so we price each job after seeing it. These are the main things that shape your estimate:
- Total square footage and ceiling height
- Number of rooms, bathrooms or kitchenettes
- Moisture issues that must be corrected first
- Mechanical work such as heating, plumbing and ventilation
- Egress windows and exits required for bedrooms
- Flooring, lighting and finish level
Frequently asked questions
Do I need a permit to finish my basement in Ottawa?
Yes. The City of Ottawa states that a building permit is required to finish a basement, and the work is inspected at key stages. Read our guide on basement permits in Ottawa, and we confirm the requirements for your home before work starts.
What about moisture and water in the basement?
Moisture must be dealt with before the basement is finished. We check for signs of leaks and recommend repairs first, including foundation work if needed.
Can you add a bathroom in the basement?
Yes, depending on drain locations and ceiling height. We assess this at the start so there are no surprises.
Can I finish only part of my basement?
Yes. Many homeowners finish one area now and the rest later. We plan so later phases connect easily.
Helpful guides
- Do I Need a Permit to Finish a Basement in Ottawa?
- How Long Does a Basement Renovation Take in Ottawa?
- How Much Does Foundation Crack Repair Cost in Ottawa?
- How Much Does Basement Waterproofing Cost in Ottawa?
- How to Choose a Renovation Contractor in Ottawa
- How Much Does Flooring Installation Cost in Ottawa?
- Finish Your Basement or Build a Legal Secondary Suite in Ottawa?
- Vinyl, Laminate, Tile or Carpet for an Ottawa Basement?
