Single Storey vs. Double Storey Homes

It's a trade-off, not a simple upgrade

Double storey isn't just "more house" — it's a different set of trade-offs against a single-storey design. Neither is universally better; the right choice depends on your block's shape and your household's needs.

Planning and property information is provided for general information only. Requirements can vary by property and should be verified with the relevant authority, builder or qualified professional.

Single storey — the practical case

• Needs a wider block relative to floor area, since everything sits on one level.
• No stairs — often preferred by households planning to stay long-term, or with young children or mobility considerations.
• Typically a lower per-square-metre build cost than an equivalent double-storey footprint.
• Roof and footing costs are spread across a larger single level rather than concentrated on a smaller footprint.

Double storey — the practical case

• Needs less block width for the same floor area, since living space is stacked rather than spread — often the better fit for a narrower block.
• Naturally separates zones — living areas downstairs, bedrooms upstairs — which some households strongly prefer for noise and privacy.
• Generally a higher build cost per square metre than single storey, due to the additional structure (upper floor, staircase, roof bracing).
• Upstairs rooms can capture views or breezes a single-storey design at the same address wouldn't reach.

A simple way to decide

• Wide block, want everything on one level? Single storey is usually the more cost-efficient fit.
• Narrower block, need more floor area than the width comfortably allows on one level? Double storey is usually the better fit.
• Household with mobility needs or young children? Weigh single storey's no-stairs practicality against double storey's other advantages.

Related reading

Browse route6one's single storey and double storey house plans to compare real examples of each.