Garden suites & ADUs · Kitchener
Garden Suites in Kitchener
Kitchener allows up to four dwelling units on residential lots, and a backyard building, which the by-law calls an additional dwelling (detached), can hold one or two of them.
The rules, in plain language
What Kitchener allows
Kitchener has two zoning by-laws in effect, 85-1 and 2019-051, and the rules differ, so check which one covers your lot. The rules below come from Section 4.12.3 of By-law 2019-051.
Size and lot
- Building footprint up to 80 m², within the zone's lot coverage.
- On the same lot as a single detached, semi or street townhouse. It can't be severed.
- Must connect to full municipal services.
- More than 800 m from an LRT station and outside the Central Neighbourhood Area, the minimum lot width is 10.5 m (or the zone minimum, if greater).
- Source: Kitchener Zoning By-law 2019-051, Section 4.12.3, as of November 1, 2026
Height
- 4.5 m for hip, gable, shed or gambrel roofs (to the midpoint) and mansard roofs (to the deck line). 3 m for flat roofs.
- Taller limits (6.0 m for pitched roofs) apply where the main house is 9.1 m or taller.
- Source: Kitchener Zoning By-law 2019-051, as of November 1, 2026
Setbacks and location
- 0.6 m from the rear and interior side lot lines at 4.5 m tall or less, and 0.9 m if taller (0.6 m beside a lane).
- Not in the front yard, and not within 4 m of the main house's rear wall.
- Source: Kitchener Zoning By-law 2019-051, as of November 1, 2026
Check with the city: the flat-roof limit for the taller case (main house 9.1 m or more) isn't clear from the section we read. Parking, the walkway width and fees aren't covered here, so confirm them. Some lots can't take ADUs because of lot width, servicing or natural hazards.
How we build it
Five ways to build in Kitchener
01
Geohaus factory-built
Perimeter Homes is a Geohaus partner. Studio, one- and two-bedroom layouts built in a factory and set on your lot.
See the Geohaus layouts02
Modular / prefab
Factory-built modular garden suites and backyard homes, with sizes adjustable to your lot and local rules.
Browse the model gallery03
Custom stick-built
Framed on site for tight, sloped or oddly shaped lots, or a layout no catalogue covers.
How custom worksEvery design still has to fit Kitchener's zoning for your lot. We check that before you commit.
Common questions
Kitchener garden suite FAQ
How big can a backyard unit be in Kitchener?
An 80 m² footprint, within the zone's lot coverage (By-law 2019-051).
How tall?
Generally 4.5 m for a pitched roof and 3 m for a flat roof.
Can it have two units?
Yes, an additional dwelling (detached) can contain one or two units.
Sources
Official city sources
- Kitchener Zoning By-law 2019-051, Section 4 (as of November 1, 2026)
- City of Kitchener: Additional dwelling units (as of November 1, 2026)
- City of Kitchener: Zoning bylaw (as of November 1, 2026)
This guide summarizes public city information and isn't planning or legal advice. Rules change. Confirm your lot with the city before you apply.
Start here
Talk to a garden suite builder.
Tell us about your lot and which option you're considering. We reply within one business day.