Basement Development Permits in Winnipeg: How to Apply

Basement development is the City of Winnipeg’s term for turning an unfinished lower level into rooms, bedrooms or living space. The City updated its basement construction guide and permit application form in October 2025, and most of the rules that shape a layout, such as ceiling heights, bedroom windows and door widths, are in them. Here’s what they say in plain terms, checked on October 13, 2026. If anything here differs from the City’s documents or by-laws, theirs govern.

Do you need a permit to finish a basement in Winnipeg?

Yes, if you’re adding rooms, bedrooms or living space. The City says a building permit is needed, and it must match any development permit approval or application. Cosmetic changes such as painting, flooring and millwork don’t need one. Electrical and plumbing work each need a separate permit.

A development permit is a separate zoning approval. The basement application form asks you to declare whether you need one and warns that the building permit will be refused if it turns out you did. One common trigger: if kitchen or cooking equipment will be installed, the City says a development permit for a secondary suite may be required. Our guide to secondary suite rules in Winnipeg explains what changes when a basement becomes a suite.

What are the requirements for basement development in the City of Winnipeg?

The City’s October 2025 basement guide sets minimum ceiling heights, bedroom window sizes, door widths, stair handrails and guards, interconnected smoke and carbon monoxide alarms, foundation-wall insulation, bathroom exhaust, return air in bedrooms, electrical outlets and lighting, and a backwater valve for new below-grade plumbing. The table summarizes the numbers you’ll plan around.

Summary of the City of Winnipeg’s Basement/Lower Level Development guide (updated October 2025). The guide, the Winnipeg Building By-law and the Manitoba Building Code govern.

Can an existing basement window be used for a bedroom?

Only if it meets the size rule. The City’s guide says that if existing lower-level windows don’t meet the required size, they have to be replaced or the bedroom won’t be permitted. A bedroom door that leads directly outside removes the need for the window.

Any window added or enlarged in the foundation wall needs drawings stamped by an engineer, plus a site plan and elevations with the application. For choosing the window itself, see window and door replacement in Winnipeg.

What documents does the City ask for?

The City’s basement building permit form asks for one fully dimensioned copy of each document that applies: a floor plan, a site plan and elevations if foundation-wall openings change, structural or engineered drawings for structural work, the basement development checklist, and the owner and declaration forms. Here’s what each covers:

• A floor plan showing every room labelled by use, room sizes, all doors and windows with width and height, and the electrical and plumbing layout.
• A site plan and elevations when new or larger windows or doors are proposed in the foundation walls.
• Structural drawings when joists or beams are altered, stairs are installed or moved, or load-bearing walls are opened, moved or removed; engineered drawings for major work such as altering teleposts or beams or repairing foundation walls.
• The basement development checklist: bedrooms being created, bedroom window types and unobstructed opening sizes, window wells, door sizes, finished ceiling heights, height under beams and bulkheads, and headroom at the stairs.
• An owner statement if a contractor applies, the declaration form, and the development permit exemption declaration if your project is exempt.

Any new bedroom triggers a review by the City’s Plan Examination staff. A house with more than five bedrooms in total also needs a residential ventilation record or engineered mechanical drawings.

How do you apply?

1. Confirm whether you need a development permit by calling Permits Direct Line at 204-986-5140 or emailing ppd-zdo@winnipeg.ca.
2. Assemble the drawings and checklist described above.
3. Submit through Permits Online, by email to ppd-permit@winnipeg.ca, or as one paper package at the Zoning & Permits office, Unit 31-30 Fort Street.
4. Arrange the separate electrical and plumbing permits for that work.
5. Book each inspection before the work it covers is closed in.

Which inspections will a basement need?

Before any new work is covered, an inspection has to be requested through the City’s housing inspection request form. Wiring and plumbing are inspected before insulation or drywall. Insulated walls need a rough-in inspection, then a preboard inspection of insulation and vapour barrier, which the City requires for any basement developed after the house was built.

Two details from the City’s insulation bulletin catch people out. Batt insulation can’t touch the concrete foundation; a moisture barrier or air space is required. And builders were allowed to leave the basement vapour barrier partly unsealed, so whoever develops the basement is responsible for reinstalling insulation where needed, sealing the vapour barrier and having it inspected.

The City also recommends building non-loadbearing partitions as floating walls, with about 25 mm (1 in.) of space at the top or bottom, because concrete basement floors can move upward when soil moisture increases. Our guide to clay soil and basement cracks explains why that matters here.

What should you check before you apply?

• Moisture: find and fix the source of any dampness before framing. The basement flood protection guide covers backwater valves and sump pits.
• Radon: Health Canada recommends a test of at least three months, ideally in fall or winter. See radon testing before finishing a basement.
• Height under beams and ducts: the checklist asks for it separately from the ceiling height, so measure it before you place bedrooms and bathrooms.
• Bedroom windows: measure the clear opening of each existing window against the 0.35 m² and 380 mm minimums.

Next step

A typical basement takes about 4–8 weeks to build. Our basement renovation projects start with a free on-site visit and a free written quote, and permits and inspections are coordinated with the City or your local municipality. For a starting range, see basement renovation costs in Winnipeg or try the instant estimate, then book your visit when you’re ready.