Can you finish a basement for $20,000?
Not as a full development in our estimator: the smallest range, for basements up to 500 sq ft, starts at $25,000 and runs to $80,000. Share your budget at the on-site visit. We look at moisture, ceiling height and where the mechanical sits, and tell you what is realistic for your space before you get attached to a plan.
Painting and new flooring alone don’t need a building permit in Winnipeg, but adding rooms, bedrooms or living space does. Our basement development permit guide explains how that works, and our Winnipeg renovation cost guide compares basement prices with kitchens and bathrooms.
How much does it cost to add a bathroom in the basement?
In our estimator, adding a basement bathroom runs $5,000–$7,500, with new plumbing at $1,500–$2,750. What changes the real number is the drain: if there isn’t one where the bathroom needs to go, the concrete is broken and the drain re-run, or an up-flush system is used. We tell you which your basement needs.
The City of Winnipeg’s basement construction guide also requires a backwater valve on new plumbing branches below grade, an exhaust fan of at least 25 L/s (50 cfm) vented outdoors or through an HRV in any room with a toilet, and an inspection of plumbing before it is covered. Those items are part of the written quote.
Do you need an egress window in a basement bedroom?
Yes, unless the bedroom has a door straight to the outside. The City of Winnipeg’s guide requires a bedroom window that opens from inside without tools, with at least 0.35 m² (3.77 sq ft) of clear opening and no dimension under 380 mm (15 in). Our estimator prices egress window installation at $2,500–$4,000.
Where the window opens into a window well, the guide calls for at least 760 mm (30 in) of clearance in front of it. If the existing windows are too small, they have to be replaced, or the room can’t be permitted as a bedroom.
What should you check before finishing a basement?
Moisture, ceiling height and radon. A damp basement has to be fixed before framing, finished rooms need enough ceiling height under the City’s rules, and Health Canada says a radon test should run for at least three months. Checking all three first avoids paying to open up finished walls later.
- Moisture: find and fix the source before anything is framed. See our guide to basement flood protection in Winnipeg.
- Radon: a long-term test takes at least three months, so start well before work begins. See our guide to radon testing before finishing a basement.
- A suite: a secondary suite has its own permit requirements. Read our guide to secondary suite rules in Winnipeg before you plan one.
Our basement development page shows how a project runs, from the first assessment to handover.