Home / Granny flat designs
Granny flat designs
Seven layouts, all steel-framed, all within the 70 m² WA limit. Pick one as it is or ask us to adjust it.
Studio 27
- 27.43 m²
- 1 bed
- 1 bath
Fixed price after a free site visit
One 37
- 36.6 m²
- 1 bed
- 1 bath
Fixed price after a free site visit
One 40
- 40 m²
- 1 bed
- 1 bath
- 10 × 4 m
Fixed price after a free site visit
Two 40
- 40 m²
- 2 bed
- 2 bath
- 10 × 4 m
Fixed price after a free site visit
Two 45
- 45 m²
- 2 bed
- 1 bath
- 7.5 × 6 m
Fixed price after a free site visit
Two 60
- 60 m²
- 2 bed
- 2 bath
Fixed price after a free site visit
Two 64
- 64 m²
- 2 bed
- 2 bath
- 10 × 6.4 m
Fixed price after a free site visit
Compare the range
| Design | Size | Rooms | Best for |
|---|---|---|---|
| Studio 27 | 27.43 m² | 1 bed, 1 bath | A home office, guest suite, teenager's retreat or a single tenant. |
| One 37 | 36.6 m² | 1 bed, 1 bath | A single person or couple, a parent close by, or a strong one-bedroom rental. |
| One 40 | 40 m² | 1 bed, 1 bath | The most popular one-bedroom rental size. Also suits a parent who wants room for visitors. |
| Two 40 | 40 m² | 2 bed, 2 bath | Two housemates or a share-house rental: each bedroom has its own bathroom. |
| Two 45 | 45 m² | 2 bed, 1 bath | Wider, squarer blocks and backyards. A family-friendly two-bedroom rental. |
| Two 60 | 60 m² | 2 bed, 2 bath | The strongest rental layout for couples and small families, or for ageing parents with a carer. |
| Two 64 | 64 m² | 2 bed, 2 bath | The biggest flat in the range, close to the 70 m² WA limit. Built for long-term tenants or family. |
Included in every design
| Frame | Light-gauge steel, G550 grade with AZ150 coating to AS 1397. Termite-proof and won't warp or rot. |
| Roof | 0.5 mm Colorbond sheet roof on steel battens, with aluminium gutters and downpipes |
| Insulation | R2.5 glass wool in external walls and internal walls, plus ceiling insulation |
| Windows | Aluminium windows, double-glazed |
| Kitchen | Cabinets, benchtop, sink and mixer |
| Bathroom | 900 × 900 shower, vanity and WaterMark-certified toilet |
| Electrical | Wiring, switchboard and connections completed and certified by a licensed WA electrician |
| Plumbing | Connected to your water and sewer by a licensed WA plumber |
| Design wind rating | Engineered to an N3 wind classification baseline, confirmed for your site by engineering |
Final specification, finishes and colours are confirmed in your quote and drawings. Floor plans are indicative.
Things we check before you choose
- Crane and truck access. The module arrives on a truck and is lifted over the house or down the side. Most Perth blocks are fine; we check yours on the site visit.
- Setbacks and open space. The R-Codes decide how close to the boundary the flat can go and how much of your block stays open.
- Services. Where your sewer, water and power are and how far they are from the flat.
- Bushfire areas. If your lot is bushfire-prone, the design has to meet its BAL rating.
Common questions
Can you change a layout?
Yes. Most designs can be adjusted, for example mirroring the plan, changing window positions or finishes. Bigger changes are possible but can add time and cost, and we tell you before you commit.
Do patios and decks count towards the 70 m²?
Generally no. The WA limit applies to the granny flat's plot ratio area, which is roughly its internal floor area. Decks and verandahs are usually not counted.
See what fits in your backyard
Book a free site visit. A registered builder checks your block, access and services, then sends a fixed-price quote.