Modular & Prefab Granny Flats WA

MIRA Residential designs custom modular, prefabricated and transportable granny flats across Perth and the whole of Western Australia.

Our secondary (ancillary) dwellings are design-led additions that make the most out of your land, whether for family, guests or additional income. Each home is shaped by clear planning, effective layouts, and materials specifically chosen for WA.

Our focus is always on proportions, simplicity and architectural clarity. Built off-site and delivered with precision, MIRA granny flats are designed for a wide range of environments, from suburban blocks to coastal and regional locations, and are designed for straightforward build and delivery.

Filter by

Filter by:

Apply filter

Custom Granny Flat Designs Built for WA Conditions

Granny flats in Western Australia need to do more than just add extra space. They have to fit tight backyards in metro areas, suit larger regional blocks, meet access constraints and still deliver a comfortable, self-contained home.

At MIRA Residential, our modular and transportable granny flats are designed specifically for these conditions. Each layout is developed to make efficient use of space, with clear areas for living, sleeping and daily activities, without overcomplicating the design.

Because they’re built off-site, we can focus on precision, material quality and consistency, then deliver and install across a wide range of WA sites.

Our designs range from smaller dwellings to more flexible layouts for multi-purpose use. Each can be adapted to suit your block, budget and your lifestyle.

If you’re after something a bit more personal, we can design a granny flat around your site from the ground up. This includes working within access, setbacks and service constraints while shaping a layout that suits how you actually plan to use the space.

Trusted Partners

FAQs

A modular granny flat is a secondary dwelling built off-site in sections (modules), then transported and assembled on your property. This approach allows for greater control over build quality, reduced on-site disruption and faster delivery times. In WA, modular granny flats are designed to suit a range of block types, from suburban backyards to regional sites and must meet local council requirements for ancillary dwellings.

These terms are often used interchangeably, but there are slight differences. Prefab broadly refers to any off-site construction; modular refers to homes built in sections; and transportable typically refers to the delivery and installation method. At MIRA, we design and deliver modular, transportable granny flats specifically for WA conditions.

Modular granny flats offer faster build times, more consistent quality control and less disruption to your property. Because the majority of construction happens off-site, weather delays are reduced, and detailing can be more controlled. For WA homeowners, this also means more predictable outcomes across different site conditions, from tight urban blocks to more open regional properties.

Timeframes vary depending on the design, approvals and site conditions, but modular granny flats are generally completed faster than traditional builds. Once approved, construction is carried out off-site in approx 12 weeks while site works happen in parallel. In many cases, installation on-site can be completed in a matter of days, depending on access and complexity.

In most cases, yes, but it will depend on zoning, lot size and local planning requirements. WA has specific regulations around secondary dwellings that must be met before construction. MIRA works with you through the design and planning process to ensure your granny flat aligns with council requirements and is suitable for approval.

Custom Modular, Prefab & Transportable Granny Flats in WA

The Allure

The Horizon

The Arko

The Fernleigh

The Outlook

The Arcadia

The Dune

The Homestead

The Inspire

The Escape

The Vista

The Moda