Key takeaways
| Question | Short answer | Source |
|---|---|---|
| Legal name | Additional residential unit (ARU) in an ancillary building; Toronto calls it a garden suite or laneway suite | Planning Act |
| How many | Zoning cannot prohibit one unit in an ancillary building on most urban residential lots | Planning Act s. 35.1(1) |
| Who can live there | Anyone, related or not | O. Reg. 299/19 |
| Smallest size | 17.5 m2 (188 ft2) Building Code minimum; some by-laws cap size, for example at 37 m2 | Ontario tiny home guide |
| Pods on wheels | Campers, RVs and seasonal structures are not tiny homes | Ontario tiny home guide |
| Permit | Required; must meet zoning, the Ontario Building Code and tree rules | City of Toronto |
What a granny pod is
A granny pod is an everyday name for a small, self-contained home in the back yard, often built in a factory and set on the lot. It has its own kitchen, bathroom and sleeping area, so in Ontario it counts as an additional residential unit. Ontario's laneway house guide says additional residential units are often called second or basement suites, accessory dwelling units, secondary detached dwelling units, granny flats, coach houses, tiny homes or laneway suites, and that municipal zoning by-laws decide which of these count.
Source: Ontario Ministry of Municipal Affairs and Housing — Building a laneway house (2021).
What Ontario law calls a granny flat
The Planning Act defines a residential unit as a self-contained set of rooms used as residential premises, with kitchen and bathroom facilities intended for that unit only. A granny flat or granny pod that has its own kitchen and bathroom, in a building separate from the house, is an additional residential unit (ARU) in an ancillary building.
The City of Toronto defines a garden suite as self-contained living accommodation in an ancillary building, usually in the rear yard but not on a public lane, separate from the main house. A laneway suite is the same idea on a lot that shares a property line with a public lane.
Sources: Planning Act, s. 1(1) (e-Laws); City of Toronto — Garden Suites.
Can you put a granny pod in your backyard?
Often yes, but the lot decides. Ontario's tiny home guide says that before adding a small home to a property you should first speak with your municipal planning and building departments. The topics it lists are:
- the zoning requirements that apply to your property
- designing the unit to comply with the Building Code
- building permits and the inspections during construction
- parking requirements
- any size requirements for small homes
- rules about connecting to municipal services
The same guide says small homes must still meet the health and safety requirements of the Building Code, municipal zoning and other by-laws, and must have servicing such as water and sewage. It recommends hiring a registered Building Code designer, planner, architect or engineer to help with approvals.
Source: Ontario — Build or buy a tiny home. For lots on a public lane, see what a laneway house is.
How small a granny pod can be
Ontario's tiny home guide says the size of a small home varies by municipality. Some by-laws set a minimum and others a maximum, for example 37 m2 (400 ft2) or less. In all cases the unit cannot be smaller than the Building Code minimum of 17.5 m2 (188 ft2). Toronto's garden suite rules set their own height and floor area limits in Chapter 150.7 of Zoning By-law 569-2013.
Sources: Ontario — Build or buy a tiny home; City of Toronto — Garden Suites. More on small homes: tiny home rules in Ontario.
Granny pods on wheels and prefab pods
Ontario's tiny home guide defines a small home as a private, self-contained unit with living, kitchen, bathroom and sleeping areas, intended for year-round use. It says campers, recreational vehicles, cottages and other structures used on a seasonal basis are not considered tiny homes. A pod built in a factory and brought to the lot is treated like any other new dwelling unit: it needs a permit and must meet the Building Code where it is installed.
Ontario's modular house guide adds that a unit made or bought outside Ontario must be confirmed to meet Ontario's Building Code; being sold in Ontario does not mean it complies.
Sources: Ontario — Build or buy a tiny home; Ontario — Building a modular house. How factory certification works: what a modular home is in Ontario.
How many you can have
On a parcel of urban residential land with a detached house, semi-detached house or rowhouse, Planning Act s. 35.1(1) says zoning cannot prohibit one unit in an ancillary building, as long as the house has no more than two units and no other ancillary building has a unit. That means one backyard granny flat per lot, plus up to two units in the house. Toronto states that a single garden suite containing a single unit is permitted on a property, if it meets the rules.
Sources: Planning Act s. 35.1(1); City of Toronto — Garden Suites. More detail: additional residential units in Ontario and basement suite vs garden suite.
Who can live in it
A granny flat does not have to be for a grandparent. O. Reg. 299/19 says an additional residential unit may be occupied by any person, whether or not they are related to the occupant of the main unit, and whether or not either occupant owns the lot. Ontario's second-unit guide notes that a second unit can provide independent living for a family member.
Sources: O. Reg. 299/19 (e-Laws); Ontario — Add a second unit in your house.
What Toronto requires
- Zoning. Zoning By-law 569-2013 permits garden suites in the R, RD, RS, RT and RM zones. Chapter 150.7 sets the rules.
- Building permit. A permit is required. The suite must comply with zoning, the Ontario Building Code and tree regulations.
- Emergency access. Firefighter access is checked through an Ontario Building Code review by Toronto Building and Toronto Fire, and cannot be varied by a minor variance.
- Trees. A garden suite should not remove a healthy by-law protected tree (30 cm diameter or more on private property, or any City-owned street tree).
- Services and land. Water and sanitary connections are intended to come from the main house, and the lot cannot be severed to put the suite on its own lot.
- Charges. By-law 1137-2022 s. 415-6(A)(2) exempts second, third or fourth units on a single residential parcel from development charges.
Source: City of Toronto — Garden Suites. Other cities: garden suite rules across the GTA.
Converting a garage
Toronto says existing garages and ancillary buildings can be converted into garden suites, but not every structure is large enough. A structure built with a permit keeps relief from setbacks and separation distance, but still has to meet height, floor area, angular plane and soft landscaping rules. A structure built without a permit is treated as a new building.
Source: City of Toronto — Garden Suites.
What drives the cost
There is no single price for a granny pod, because most of the cost is set by the lot. The items that move it are the foundation, water and sewer connections, permit and application fees, any tree or access work, and for factory-built units the trip from the factory. Ontario's modular house guide notes that the greater the distance from the factory to your lot, the greater the cost. In Toronto, the development charge exemption above removes one fee for eligible units.
Sources: Ontario — Building a modular house; City of Toronto — Garden Suites. Cost factors in detail: garden suite costs and fees in Ontario.
If the proposed home is above or beside a garage, compare coach house terminology and municipal differences before choosing a design.
Where Modular X fits
Modular X designs, permits and builds garden and laneway suites in modules. A feasibility check reviews zoning, access, trees and servicing before any design or price. Start with a lot feasibility check, read the garden suite overview, or see prefab and modular garden suite rules.
FAQs
Sources
- Planning Act, R.S.O. 1990, c. P.13, s. 1(1) and s. 35.1
- O. Reg. 299/19: Additional Residential Units
- Ontario — Build or buy a tiny home
- Ontario — Building a modular house
- Ontario — Building a laneway house (2021)
- Ontario — Add a second unit in your house
- City of Toronto — Garden Suites
Disclaimer: Figures cited are market estimates provided for information only and are not a quote. Municipal rules, fees, and programs change — always verify current requirements with your local authority. Modular X provides exact pricing only after a site-specific feasibility review.