Attached & Basement Suites in Winnipeg
A full suite inside the house you already own, usually the basement, or added onto the back or side of it. The most affordable way to add a home to a Winnipeg lot.
At a glance
- Max size
- 800 sq ft or 33%
- Min size
- 350 sq ft
- Zones
- Most residential, plus more
- Parking
- Two off-street spaces
- Ballpark
- $60k to $150k
What it is
A Second Home Under the Same Roof
The City calls it an attached secondary suite: a self-contained unit with its own kitchen, bathroom and sleeping space, inside or added onto a single-family house. Most are basement suites. Some are an addition off the back, a converted main floor, or a suite over an attached garage.
It's the cheapest way in by a long way, since the foundation, roof and services already exist. It's also allowed in more zones than a detached suite, including A, RR5, RR2, R1, R2, RMF, RMU and C1.
What people underestimate is the gap between a finished basement and a legal suite. Drywall, a kitchenette and a hot plate don't make a suite. Fire separation, a second way out, proper bedroom windows and heat that doesn't share smoke with the family upstairs do, and that's where the money goes.
Going legal
What Turns a Basement Into a Legal Suite
The usual list. Your house might already have half of it.
Fire separation
Fire-rated drywall and sealed openings between the suite and the main house, including the ceiling.
Interconnected alarms
Smoke and CO alarms wired together, so one going off in the suite sets off the ones upstairs too.
Egress windows
Bedroom windows big enough to climb out of, which often means cutting the foundation and adding a window well.
Its own entrance
A separate door to outside. Only one entrance can face the street, so suite doors usually go at the side or back.
Heat and air
Separate heating, or ductwork set up so smoke can't travel between the units. A mini-split often makes this simpler.
Headroom and sound
Enough ceiling height under the ducts and beams, and insulation in the ceiling so footsteps don't carry.
Options
Basement, Addition or Main Floor?
Three ways to build an attached suite, and roughly what each costs.
| Type | Good for | Watch out for | Ballpark |
|---|---|---|---|
| Basement suite | Houses with decent ceiling height and a side door | Low ceilings, small windows, damp | $60k to $150k |
| Addition | A suite on grade, step-free, for a parent | Lot coverage and setbacks | $180k to $300k |
| Main-floor split | Bungalows where the owner moves downstairs or up | Losing your own space | $70k to $160k |
Junior ADUs
If You've Been Reading About "Junior ADUs"
A lot of ADU content online comes out of California, where a junior ADU is a small unit of up to 500 sq ft carved out of the house, sometimes sharing a bathroom. Winnipeg doesn't have that category.
Here, a unit inside or attached to a house is an attached secondary suite, with its own kitchen and bathroom, between 350 and 800 sq ft. A room with a kitchenette that shares the family bathroom is just a room. That's fine for a teenager, but you can't rent it as a suite.
The Winnipeg ADU rules guide has the full list.
FAQ
Basement Suite Questions
Short answers. If yours isn't here, call and ask. It costs nothing.
How big can a basement suite be in Winnipeg?
An attached secondary suite can be no more than 33% of the combined floor area of the house and the suite, or 800 sq ft, whichever is smaller. The minimum is 350 sq ft. A bigger suite needs a conditional use approval.
What makes a basement suite legal?
A development permit and a building permit, plus electrical and plumbing permits, and a suite built to the Manitoba Building Code. That means things like fire separation between the units, interconnected smoke and CO alarms, bedroom windows big enough to climb out of, and enough ceiling height.
What is a junior ADU?
It's a California term for a small unit carved out of the existing house. Winnipeg doesn't have that category. Here, any self-contained unit inside or attached to a house is an attached secondary suite, with the same rules whatever you call it.
How much does a legal basement suite cost in Winnipeg?
Roughly $60,000 to $150,000. The low end is a basement that already has good ceiling height, a side door and plumbing in the right place. The high end usually involves cutting a new entrance, enlarging windows, lowering the floor or splitting the heating.
Can I legalize an existing basement suite?
Usually, if it can be brought up to code. That often means bigger windows, better fire separation and alarms, and sometimes changes to the heating. We'll walk through it and tell you what it would take before anything gets opened up.
Free site check
Find out what your lot can hold
Tell us where you are and what you have in mind. We'll look at your lot, the lane, the sewer line and the by-law, and tell you straight what's possible and roughly what it costs.
Rather talk it through? Call or text(431) 444-6291