Granny Flats in Perth: Ancillary Dwelling Requirements

Granny Flats in Perth: Ancillary Dwelling Requirements

Ancillary dwellings, commonly known as granny flats, are an excellent way to add value to your property while providing flexible accommodation options. Here’s what you need to know about building one in Perth.

What is an Ancillary Dwelling?

Under the R-Codes, an ancillary dwelling is a self-contained dwelling on the same lot as a single house. It must be used by members of the same family or by persons whose personal welfare is under the care of the occupants of the main dwelling.

Size Limits

Ancillary dwellings are limited to a maximum floor area of 70m2. While compact, this is enough for:

• One or two bedrooms

• Living area

• Kitchen

• Bathroom

• Small outdoor area

Design Options

Ancillary dwellings can take several forms:

• Detached: Standalone building in the backyard

• Attached: Connected to the main dwelling

• Fonzie flat: Above a garage or outbuilding

• Converted: Existing outbuilding converted to habitable use

Site Requirements

Your property must still meet open space requirements after adding the ancillary dwelling. Additional considerations include:

• Access for occupants

• Parking provisions

• Privacy for both dwellings

• Utility connections (may require separate services)

R-Codes Compliance

The ancillary dwelling must meet the same R-Codes requirements as single houses for:

• Outdoor living areas

• Street surveillance

• Setbacks

• Building height

Can You Rent It Out?

Ancillary dwellings can be rented, functioning similarly to the rental of a room in the main house. However, they cannot be separately titled or sold independently.

Getting Started

The first step is assessing whether your property can accommodate an ancillary dwelling while meeting all requirements. Contact me to discuss your options.

Disclaimer: This article is provided for general information purposes only. Requirements and regulations may change, and specific circumstances vary. Always consult current legislation, your local council, and qualified professionals before making decisions about your project.