Architectural & Design
Single Storey vs Double Storey: A Cost and Lifestyle Breakdown
Single or double storey is one of the first design decisions. Here is the trade-off honestly.
Cost comparison (4 bedroom home equivalent)
- Single storey 200 sqm: $440,000 to $530,000
- Double storey 240 sqm (same number of rooms but bigger): $570,000 to $720,000
- Cost per square metre: Single ~$2,200-2,650, Double ~$2,375-3,000
Block size requirements
- Single storey 4-bed: 550 sqm minimum
- Double storey 4-bed: works on 350+ sqm
Lifestyle differences
- Single: one level, no stairs, easier ageing in place, more outdoor space typical, garage and bedrooms compete for space.
- Double: bedroom separation, more wow factor, vertical site presence, more storage upstairs, harder to age in place.
Not sure which to choose?
Book a design consult and we will mock both options for your block.
Frequently Asked Questions
Quick Answers
On a per-dwelling basis, yes. On a per-square-metre basis, double storey can be cheaper because the slab is smaller. The total dollar amount is usually higher for double storey because you typically build more square metres.
Double storey if you want bedroom separation (parents downstairs or upstairs, kids on the other level). Single storey if you want everyone on one level and you have block size to accommodate it.
Yes. No stairs, easier external maintenance (gutters, roof access). Ageing in place easier. Single storey homes typically outlast double storey for the same family.
550 sqm or larger for a comfortable 4-bedroom single storey. Smaller blocks force double storey for adequate bedroom count.
Marginally. Smaller roof and slab per liveable area. But heat rises so cooling load on upstairs is greater. Net difference small in Western Sydney.
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