Granny FlatsModular & TinyTips and Advice

What’s the Difference Between a Granny Flat and a Tiny Home in WA?

Why Small Living is the Future: Granny Flats vs Tiny Homes

As the cost of living rises and sustainability becomes more than just a buzzword, more West Australians are turning to granny flats and tiny homes as smart, stylish solutions to modern housing challenges. Whether it’s for multigenerational living, rental income, or simply adopting a minimalist lifestyle, small living spaces are making a significant impact.

At Summit Homes Group, we’ve witnessed firsthand how these compact dwellings can transform properties across WA. Homeowners are rethinking space, cost, and flexibility, choosing between the timeless appeal of a granny flat and the portability of a tiny home.

But what’s the real difference between the two? Let’s break it down.

What is an ‘Ancillary Dwelling’ in WA?

In WA, the term ancillary dwelling refers to a secondary, self-contained living space built on the same lot as a primary residence. This is most commonly known as a granny flat.

Types of Ancillary Dwellings:

  • Attached to the main home (like an extension)
  • Integrated with shared walls
  • Detached as a standalone unit

WA Regulations at a Glance:

  • Must not exceed internal floor space requirements
  • Must be located on the same lot as the primary dwelling
  • Designed to complement the main residence: ideal for family use, rental income, or additional workspace

At Summit Homes Group, we design every granny flat and tiny home solution in full compliance with WA planning rules, offering peace of mind and long-term value.

Tiny Homes & Granny Flats as Ancillary Dwellings

In WA, granny flats are the classic example of an ancillary dwelling. Built to last and fully compliant with the Residential Design Codes (R-Codes), they are permanent fixtures designed for comfortable long-term living.

Tiny homes, on the other hand, are typically modular in design for efficient construction. While they are designed to be compliant with ancillary dwelling requirements, tiny homes are more suitable for regional locations or sites with good access for installation.

Although tiny homes can qualify as ancillary dwellings in WA, they must still meet local planning requirements and building codes. It’s important to note that not all tiny homes, especially those on wheels or designed for off-grid living, are considered legal permanent dwellings under current regulations.

At Summit Homes Group, we design both tiny homes and granny flats with full adherence to WA’s regulations, delivering modern, functional homes that work with your land, lifestyle, and goals.

Granny Flats by Summit Homes Group

Summit’s granny flats offer a perfect solution for homeowners looking for a permanent, practical, and value-adding addition to their property.

Construction Method:

  • Built on-site using traditional techniques (e.g. concrete slab, double brick, or brick hybrid)
  • Designed to blend seamlessly with your existing home

Size:

  • Typically up to 70m², however, some councils may allow for a larger ancillary dwelling

Utilities and Comfort:

  • Fully connected to water, electricity, and plumbing
  • Includes kitchen, bathroom, living area, and one, two, or three bedrooms

Popular Use Cases:

  • Long-term rental or Airbnb accommodation
  • Housing for elderly parents or grown-up children
  • Separate home office, art studio, or guest house

Costs and Timeline:

 

Tiny Homes by Summit Homes

Summit’s tiny homes provide a compact, contemporary living solution that’s ideal for those seeking a minimalist lifestyle, secondary dwelling, or short-stay accommodation without compromising on quality or style.

Construction Method:

  • Prefabricated in a factory and then transported and assembled on-site
  • Built with precision and efficiency, reducing delays due to weather or site complications

Size:

  • Ranges from 32m² to 71m², depending on layout and features

Utilities and Eco-Friendliness:

  • Can be installed for off-grid living with solar, rainwater tanks, and wastewater treatment systems
  • May connect to existing utilities or operate independently in rural or remote areas

Ideal Use Cases:

  • Eco-conscious living or lifestyle retreats
  • Short-term accommodation or tourism ventures
  • Rural or lifestyle blocks looking to generate multiple rental streams

Costs and Timeline:

Choosing the Right Option with Summit Homes Group

When it comes to small living, the choice between a granny flat and a tiny home really comes down to your needs, location, and lifestyle goals.

Feature Granny Flat Tiny Home
Size Typically up to 70m² 32–71m²
Construction On-site (traditional) Modular & prefabricated
Utilities Fully integrated Off-grid options available
Use Long-term residence, family, rental Flexible, mobile, eco-living
Cost From ~$174k From ~$159k
Timeline 6-9 months* (on-site build) 16 weeks* (modular construction)

 

At Summit Homes Group, we specialise in both traditional and modular construction methods. Whether you’re investing in a secure, permanent dwelling or seeking a tiny home for rural or rental use, we’ve got you covered.

Ready to Downsize, Upgrade, or Invest?

Explore our full range of Granny Flats and Tiny Homes designed for WA’s unique lifestyle and regulations. Chat with one of our consultants today to discover the perfect granny flat or tiny home solution for your property.