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About Our Company

Perth Granny Flats forms part of Perth Extensions Pty Ltd. As a registered building company with more than 25 years experience in home extensions and renovations we have established a reputation for all round excellence.

We believe that stand-alone home extensions, or so called Granny Flats, are an ideal solution to create extra space to your current home or provide an affordable investment. Whatever your reason for wanting to build a Granny Flat, Perth Granny Flats can provide you with a turn-key or customised solution that will result in a quality finished project.

Our team consists of individuals that excel in their field and pride themselves in their professional achievements

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Our Team

About Our Process

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We provide an initial consultation for our clients. This is when we discuss what you are looking for in your design and where we answer any of your question that you need answers for. Once we have sorted out all of the initial details, we move onto the design process. The main priority here is to decide on whether you want to build a unit from scratch or to choose from our range of ready-to-install units at our display village. We offer the opportunity for our clients to explore our display village, of ready to install units, not just to pick their ideal unit but to explore the range of designs, finishes and products that we can provide. Once you have decided on the design we will go through documentations (contracts and permits) and install process (if for any reason we are unable to crane in your desired unit, we offer the option to build the unit on-site using the same materials and building style as seen in the display village.).
We offer our clients the option of three construction stages. 
1. Base Model
This stage takes the project to “lock up stage” and will exclude all fixture and fittings and tiling to the bathroom and kitchen (water and sewer services are included to the wet areas and electrical connection to the main power).

2. Standard Model
This will provide a completed project to our standard specification.

3. Deluxe Model
This is where the client can select from various internal and external finishes, opt for security screens, painting, floor finishes, window treatments and even full height tiling in the bathrooms.
Additional options offered are timber decks and patios.
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​Standard Inclusions:

  • Our designs offer clients the option to construct their Granny Flat off the ground or on a traditional 100 concrete slab in accordance with our engineering details.

  • The wall frames are constructed of 90mm 1.2mm cyclone rated blue steel

  • Colour bond roofs, gutters and down pipes

  • Sisalation is used to cover the framed construction before external cladding is applied

  • External cladding can be James Hardie Weather Board - Woodgrain, Smooth, Old Style or Rustic

  • Walls and roofs are thermally insulated to our energy efficiency specifications using R1.9 & R3 Insulation to minimize heat and noise transfer

  • Ceilings and walls are constructed of 10mm gyprock

  • Door frames, doors and door furniture

  • WA manufactured windows and sliding doors with fly screens

  • Bathrooms with standard range including vanity, toilet and shower with shower screen

  • Tiling to floor, skirting and full height tiling to shower

  • Towel rail, toilet roll holder and mirror. Extractor heat lamp combo

  • Electrical in accordance to floor plan selected with smoke detectors, RCD’s and connected to main power supply

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