Granny flats
that pay you back.
The Property Plug holds 8 granny flat designs for Perth, priced from $217,500 to build before siteworks. In WA an ancillary dwelling up to 70m2 can be rented to a private tenant, so a granny flat is a true dual income build on a block you already own or are buying.
Each design sits within or close to the WA 70m2 rentable limit. The builder is matched and revealed when you request private access. Open any design for its full specs and a per suburb price.
Every design priced from its base build cost, before siteworks. Most sit within the WA 70m2 rentable limit.
| Design | Floor area | Within 70m2 | Build from |
|---|---|---|---|
| Retreat | 70m2 | Yes | $232,100 |
| Haven | 68m2 | Yes | $217,500 |
| Tranquil | 70m2 | Yes | $225,700 |
| Generation | 70m2 | Yes | $263,000 |
| Cosy Corner | 77m2 | No, larger dwelling | $246,600 |
| Synergy | 100m2 | No, larger dwelling | $306,000 |
| Sunset | 75m2 | No, larger dwelling | $263,300 |
| Bayview | 100m2 | No, larger dwelling | $299,900 |
- Granny flat hubThe WA 70m2 rule, a yield worked example, all 8 designs and the downloadable price list.
- Granny flat investmentThe dual income thesis, depreciation and the numbers behind a Perth granny flat.
- Dual income propertiesOne block, two rents. How dual occupancy stacks against a single home.
- Granny flat costBuild price bands, siteworks and what a real all-in figure includes.
- Rental yieldHow granny flat yield is calculated and what Perth corridors return.
- WA ancillary dwelling rulesThe 70m2 rentable rule, setbacks, permits and the 2020 and recent changes.
Independent and on your side. We are paid by the builder, never by you.
What is a granny flat in Western Australia?
A granny flat is an ancillary dwelling, a self contained second home on the same lot as a main house. Under the WA R-Codes it can be up to 70m2 of floor area (80m2 if designed for accessibility) and, since the 2020 rule change, can be rented to anyone, not just family.
Can I rent out a granny flat in WA?
Yes. Since 2020 a WA ancillary dwelling can be let to a private tenant, not only a family member. That single rule is what makes a granny flat a genuine dual income asset on a block you already own or are buying.
How long does a granny flat take to build?
Plan on around 8 months from contract to handover for a granny flat through The Property Plug panel, plus design, approval and siteworks time before that. A building permit is needed even when planning approval is not.
How much does a granny flat cost to build in Perth?
Granny flat build prices on our panel start from $217,500 for the design, before siteworks. In a corridor suburb like Baldivis the home plus siteworks lands from $238,268. Land is separate. See the granny flat cost guide for the full breakdown.
See the granny flat price list
One request matches all 8 designs, full inclusions and your matched builder, with a real price for your block. Free to you.