Niagara Falls zoning for small homes
City of Niagara Falls, in the Region of Niagara. Population 94,415 (2021 census).
Backyard suite
A separate home in the yard of a house: garden suite, laneway suite or coach house, including prefab, modular or container units used this way.
Allowed · Niagara Falls’s term: “additional dwelling unit (ADU) in an accessory building”
One additional dwelling unit in an accessory building is permitted on urban residential parcels with a detached, semi-detached, townhouse, on-street townhouse or duplex dwelling, and on rural parcels zoned A or R with a detached dwelling, up to three units in total. Setback, height and lot coverage limits apply. [1][2]
- Number allowed
- Up to two ADUs per parcel, of which at most one in an accessory building (one ADU in total where a duplex is permitted) (s.4.45.1, s.4.45.2) [3]
- Setbacks
- Rear or interior side yard; minimum 1.2 m from rear and interior side lot lines; 4.5 m from a flanking street on a corner lot (s.4.45.4(a),(c)) [3]
- Maximum size
- Total lot coverage of all accessory buildings and structures 93 m², within the zone's overall lot coverage (R4 zone: 45%) (s.4.45.4(e)) [3]
- Maximum height
- Urban: 4.5 m, or 6 m with a pitched roof (walls max 4.5 m) (s.4.45.4(f)); rural: 7 m (walls max 5.5 m) (s.4.45.4(i)) [3]
- Separation from house
- Rural parcels: no more than 15 m from the detached dwelling (s.4.45.4(i)) [3]
- Parking
- 1 parking space for each additional dwelling unit (s.4.19.1); City page says it may be tandem and on-street parking is not permitted [3]
- Servicing
- Urban: municipal water and sewer; rural: existing septic with capacity or a new septic system [1]
Ontario-wide rule
Ontario law stops municipalities from banning one residential unit in a building ancillary to a detached house, semi-detached house or rowhouse on a parcel of urban residential land, as long as the lot has no more than three units in total. Municipalities still set most other zoning rules, but provincial law limits parking requirements, minimum unit size, lot coverage and separation distances. These units are also exempt from development charges and parkland dedication. [4][5][6]
Tiny home on a foundation
A small house as the main home on its own lot. The key rule is any minimum dwelling size.
Allowed with limits · Niagara Falls’s term: “detached dwelling”
The urban R1 zones read set no minimum dwelling floor area, but the Agricultural (A) and Rural (R) zones require a minimum floor area of 80 m² per dwelling and the Residential Village (RV) zone 111 m² for a detached dwelling.
- Minimum dwelling size
- A zone: 80 m² (892 sq ft) per dwelling unit (s.12.2(f)); R (Rural) zone detached dwelling: 80 m² (892 sq ft) (s.13.2(b)(ix)); RV (Residential Village) zone detached dwelling: 111 m² (s.7.18); no minimum in the R1A zone standards (s.7.1.2) [3]
Ontario-wide rule
Ontario law sets no minimum total size for a house that is the main dwelling. The Building Code sets minimum room areas, so the smallest compliant dwelling is roughly 17.5 m² by the Province's own estimate. Municipalities may still set minimum floor areas for main dwellings in their zoning by-laws. The provincial ban on minimum sizes covers only additional residential units. [4][7][8][9][10][11][12]
Tiny home on wheels or park model
Living full-time in a tiny home on wheels or a park model home.
Allowed with limits · Niagara Falls’s term: “mobile home / trailer”
A mobile home may only be erected, located or used on a mobile home site in a Residential Mobile Home Park (RMP) zone. Trailers are defined as temporary travel or vacation accommodation and are permitted in licensed trailer camps in the Camping Establishment (CE) zone, which are for temporary or seasonal occupancy.
- Where allowed
- Mobile homes only on a mobile home site in an RMP zone (s.4.26, s.7.6); trailer camps licensed by the City in the CE zone (s.8.7.1) [3]
- Minimum lot size
- Each mobile home site in an RMP zone at least 270 m² and 10 m wide (s.7.6.2) [3]
Ontario-wide rule
Ontario has no single rule for living full-time in a tiny home on wheels. A unit on wheels can count as a 'building' that needs a permit and must meet the Building Code once it stays in one place, is hooked up to services or is anchored. Park model trailers are recognized only as seasonal recreational buildings. Municipalities may allow a portable garden suite under a temporary-use by-law for up to 20 years, with extensions of up to 3 years each. [12][7][4][9][8]
Bunkie or sleeping cabin
A small sleeping building with no kitchen, usually beside a cottage or house.
Not allowed · Niagara Falls’s term: “accessory building”
An accessory building is defined as one not used for human habitation except where permitted as an additional dwelling unit, and the rules for the A1, A2, A3 and other rural-area zones also state accessory buildings shall not be used for human habitation. A sleeping-only cabin is therefore not permitted; a full additional dwelling unit is the permitted alternative.
- Maximum height
- Accessory buildings in residential, A and R zones: 3 m, or 4.6 m with a pitched roof (s.4.13(f)) [3]
- Approvals
- 'Accessory building' excludes use for human habitation except as an additional dwelling unit (s.2 definition); no accessory building may be used for human habitation in the A1, A2, A3, RNP, RV, CH, IW and TCW zones (s.4.13.1, s.4.13.2(f)) [3]
Ontario-wide rule
Ontario law has no rule written specifically for bunkies or sleeping cabins. Whether one needs a building permit depends on the Building Code Act's definition of 'building' and the Code's shed exemption. That exemption covers only storage-use sheds, so it does not cover a structure used for sleeping. Municipal zoning rules for accessory buildings still apply. [9][7][4][13]
Official links
- City of Niagara Falls website
- Zoning By-law No. 79-200 (consolidated)
- Niagara Falls’s guide to additional units
Last confirmed October 2026.
Notes and caveats
Sources
- City of Niagara Falls web page (niagarafalls.ca)
- Niagara Falls’s guide to additional units
- Zoning By-law No. 79-200 (consolidated)
- Planning Act (Ontario e-Laws)
- O. Reg. 299/19: Additional residential units (Ontario e-Laws)
- Development Charges Act, 1997 (Ontario e-Laws)
- Government of Ontario PDF
- Build or buy a tiny home: Building Code requirements (Government of Ontario)
- Building Code Act, 1992 (Ontario e-Laws)
- O. Reg. 163/24: Ontario Building Code (Ontario e-Laws)
- 2024 Ontario Building Code (Government of Ontario)
- Build or buy a tiny home: permits and inspections (Government of Ontario)
- Building Code updates (Government of Ontario)
Not legal advice
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