What is a Granny Flat? The Complete Guide

Looking for a creative way to expand your space, increase the value of your property and give you options for passive income?

A granny flat may be right for you.

These small, self-contained living spaces have become a housing sensation, offering a practical solution to modern living challenges.

Over the past decade, granny flats have surged in popularity as Australians seek affordable and versatile housing solutions.

From accommodating aging relatives to generating rental income, these compact homes offer remarkable flexibility.

Whether you’re a homeowner, an investor, or someone exploring housing options, this article will provide all the insights you need about your own innovative granny flat solution.

Also known as secondary dwellings, they are compact, self-contained living spaces built on the same property as a primary residence.

They typically include essential amenities such as a bedroom, bathroom, kitchen, and living area, making them fully functional homes.

While traditionally designed to accommodate elderly family members, they have evolved to serve a variety of purposes, reflecting Australia’s dynamic housing needs.

Types

1. Detached Granny Flats – Standalone structures built separately from the main house. They offer maximum privacy and are ideal for creating a distinct living space for tenants or family members.
2. Attached Granny Flats – Extensions of the primary home, sharing a wall with the main house. They are cost-effective and convenient for properties with limited space.
3. Converted Spaces – Existing areas such as garages, basements, or attics can be transformed into functional portable buildings. This option is perfect for homeowners seeking to minimise construction costs while maximising their property’s potential.
4. Prefab or Modular Granny Flats – Pre-built structures that are assembled on-site. They are time-efficient and often more affordable than custom-built designs.

Advantages

• Housing Flexibility – They cater to diverse needs, such as accommodating elderly parents, providing independent spaces for young adults, or creating a home office.
• Rental Income – Many homeowners use them as rental properties, generating a steady income stream while maximising land use.
• Increased Property Value – A well-designed portable building can boost the overall value of your property, making it an attractive feature for potential buyers.
• Cost-Effective Housing – Compared to purchasing a new home, building a granny flat is a more affordable way to expand living options.

Challenges

• Regulations and Permits – Navigating local council regulations and obtaining the necessary permits can be complex and time-consuming. Each state and territory in Australia has its own rules regarding granny flats.
• Initial Costs – While generally cost-effective, the upfront expenses of construction, design, and utility connections can be significant.
• Limited Space – The compact design may not suit everyone’s lifestyle or storage needs, especially for larger families.
• Neighbour Relations – Construction can impact neighbours, particularly if it affects their privacy or access to sunlight. Addressing concerns early is essential for maintaining good relationships.

Each state and territory has its own regulations, including restrictions on who can live in them and whether they can be rented out to non-family members. For example:

• New South Wales (NSW): Regulations are relatively lenient, allowing granny flats to be rented to anyone, provided they comply with the State Environmental Planning Policy (SEPP).
• Victoria: Typically restricts granny flats for family use, although recent reforms are expanding their potential for broader use.
• Queensland and Western Australia: Similar family-use restrictions exist, but local councils can provide exemptions for rentals.

Key Features

• Compact Size: Small but functional, with every square metre carefully planned.
• Independent Access: Most granny flats include a separate entrance for privacy and convenience.
• Utility Connections: These units are Designed with independent plumbing and electricity, although they share connections with the primary residence.
• Single Storey: To simplify construction and maximise accessibility.

Modern Applications

• Multigenerational Living: Providing proximity to family members while maintaining independence.
• Affordable Housing: Offering a low-cost option for young adults or retirees.
• Rental Opportunities: Serving as a source of supplemental income for property owners.
• Home Offices: Creating a professional workspace separate from the distractions of the main home.

It’s crucial to understand the conditions, sizes, and regulations that govern their construction and use.

These rules vary across states and local councils, so careful research and preparation are essential to ensure compliance.

Building Conditions

They are typically subject to specific conditions designed to maintain the integrity of residential areas and ensure safety. Some common conditions include:

• Residential Zoning: The property must generally be zoned for residential use.
• Single Dwelling Rule: Most councils only allow one granny flat per property.
• Primary Residence: This portable building cannot exist on its own; it must be secondary to a primary residence.

Size Limits and Design Recommendations

The size is another important factor. While regulations differ, most councils impose strict size limits.

• Typical Size Range: 40–60 square metres is the most common allowance, although larger sizes may be permitted on rural properties.
• Proportional Design: It should remain smaller than the main house and blend with the overall property aesthetic.

Design Tips:

• Use open floor plans and multi-functional furniture to maximise space.
• Incorporate large windows for natural light, making the space feel bigger and more inviting.
• Consider accessibility features, such as ramps and wider doorways, especially if the granny flat is intended for elderly use.

Regulations and Permits

They are governed by various regulations, which differ depending on the state and local council.

New South Wales:

• Under the SEPP (Affordable Rental Housing) policy, homeowners can build a granny flat without council approval, provided the property meets minimum requirements.
• The maximum size is 60 square metres.

Victoria:

• They are generally restricted to family use.
• Planning permits are required, with size limits varying by local council.

Queensland:

• Some councils, like Brisbane City Council, allow granny flats to be rented out to non-family members, while others restrict this use.
• Approvals depend on lot size and zoning.

Western Australia:

• Approval processes and size limits are managed by local councils.
• Specific rules may apply for rental usage.

South Australia:

• The maximum size is generally 60 square metres.
• Approvals may depend on lot size and proximity to the main dwelling.

Tasmania and The Northern Territory:

• Rules are stricter and often family-use-focused, with limited rental opportunities.

Permit Application Process

You’ll typically need to follow these steps:

1. Check Local Rules: Begin by consulting your local council for zoning, size, and usage regulations.
2. Prepare a Design Plan: Ensure the plan aligns with council guidelines, including size, layout, and accessibility.
3. Obtain Approvals: Apply for planning and building permits, which may include inspections and environmental assessments.
4. Utility Connections: Plan for utility hookups (water, electricity, and sewage) to be integrated into the existing infrastructure.

At Portable Buildings WA, we pride ourselves on being the trusted experts in portable buildings, offering high-quality solutions tailored to your unique needs.

With years of experience and a dedication to excellence, we help you navigate the complexities of design, regulations, and construction, ensuring a stress-free journey from start to finish.

Don’t let costly errors or confusing regulations stand in your way. Our team is here to guide you every step of the way, turning your vision into reality with precision and care.

Contact Portable Buildings WA today at (08) 9393 4855 or claim your fast and FREE quote online to save time and money.