Do I need a planning permit for a double-storey in Melbourne?

Almost always. Double-storey homes trigger Rescode standards B17 (side + rear setbacks), B18 (walls on boundaries), B19 (daylight to windows), B20 (north-facing windows), B21 (overshadowing) and B22 (overlooking) more frequently than single-storey. Even Rescode-compliant designs on residential zoning often still need a planning permit if the block sits inside a Neighbourhood Character Overlay.

Is single-storey cheaper per square metre?

Yes, typically 20-30% cheaper per m² than double-storey. Single-storey delivers around $2,200-$2,900/m² in metro Melbourne 2026; double-storey runs $2,800-$3,600/m². The premium reflects structural upgrades (beam-frame first floor), stairs, upper-level plumbing runs and more complex roof structure.

Which has better resale value in Melbourne?

Depends on the streetscape. On character streets where all homes are single-storey (many Bayside, Boroondara, Camberwell streets) a double-storey can actually reduce value because it sticks out. On streets where double-storey is common (inner + eastern middle-ring), double-storey adds significant value. Match the streetscape, it's the single best signal.

Decision Guide

Single vs Double-Storey Homes in Melbourne

Which storey configuration wins on your block?

Double-storey delivers more house on the same land but triggers extra Rescode overshadowing rules and adds 20-35% to build cost. Single-storey is faster, simpler and more accessible, but consumes more land. Melbourne's site coverage limits often force the decision.

Single-Storey Home

Pros

$420,000-$720,000 typical Melbourne 3-4 bed metro
Faster to build (12-16 months typical)
Full accessibility on one level (aged-in-place friendly)
Lower structural cost, no beam-frame roof
Rarely triggers overlooking / overshadowing planning objections
Easier maintenance (accessible gutters, roof, exterior)
Simpler design decisions, one master plan

Cons

Consumes more site coverage, hits Rescode limit fast on tight lots
Less usable garden on small blocks
Rooms typically smaller for same total m²
Limited views (no upper-level outlook)
Locks in a specific footprint, harder to expand later
Less impressive resale-photo appeal on premium blocks

Best For

• Growth corridors with big blocks (Wyndham, Casey, Melton, Whittlesea)
• Older buyers planning aged-in-place
• Character streets where double-storey feels out of place
• Families wanting garden + play space
• Budget-conscious builds (20-35% cheaper than double)

Double-Storey Home

Pros

More house on the same block, 40-70% extra floor area
Frees up garden / entertaining area at ground level
Better views from upper level (especially Bayside, Boroondara)
Higher resale value uplift on premium Melbourne blocks
Fits Rescode site-coverage limits on smaller inner + middle blocks
Separation of sleeping + living zones
Presence + curb appeal on established streets

Cons

$620,000-$1,050,000 typical Melbourne 4-5 bed
16-22 months typical build time
Almost always needs a planning permit (overshadowing, overlooking)
20-35% higher cost per m² than single
Stairs limit accessibility for aged / mobility-limited
More expensive maintenance (upper gutters, roof, exterior)
Neighbour objections during planning are common

Best For

• Inner + middle-ring Melbourne with limited block size
• Families with older children wanting separated bedrooms
• Blocks with views to preserve
• Premium suburbs where double-storey is standard streetscape
• Investors maximising rentable area on tight lots

Melbourne 4-Bed Home Cost Comparison (2026)

Common Questions

Depends on Rescode. Most Melbourne residential zones cap site coverage at 60% and garden area at 25-35% (depending on lot size). If your block is under 350m², a single-storey home almost always maxes out the footprint, forcing double-storey to add more area. Check your local council planning-scheme + Rescode calc on VicPlan first.

Sources

Last verified June 2026

ABS Building Activity, Australia (June 2026 quarter). National average floor area and build-cost context used to compare single vs double-storey cost per m². link
National Construction Code (NCC), ABCB (2022). Energy-efficiency (7-star NatHERS), stair and fire-separation requirements that affect two-storey design. link
Housing Industry Association (HIA) (2026). New-home build-cost commentary and the premium for upper-floor framing, stairs and access. link

Cost ranges are planning estimates cross-checked against the sources above, not quotes. Prices move with materials, labour, site conditions and council rules. Always confirm against a written, fixed-price quote for your own block.