Are double-storey homes slower to build?

Yes, generally. The upper-floor structure, scaffolding and staged trades add time over a single-storey build, and double-storey designs more often sit in established suburbs where a planning permit is required. Budget a longer program and confirm it in writing with your builder.

What rules affect double-storey designs in Victoria?

ResCode standards govern overlooking, overshadowing, setbacks and building height, which directly shape where windows and the upper floor can go. In overlay areas (heritage, neighbourhood character) a planning permit and design response are commonly required. A builder or designer experienced in infill work will navigate these.

How do I check a builder is registered and insured in Victoria?

Every residential builder in Victoria must be registered with the Victorian Building Authority (VBA) in the right class (e.g. Domestic Builder - Unlimited). You can verify a registration by name or number on the VBA's public 'Find a practitioner' register. On any domestic building contract over $16,000, the builder must also take out Domestic Building Insurance (DBI), issued through the VMIA, which covers you for incomplete or defective work if the builder dies, disappears or becomes insolvent (6 years structural, 2 years non-structural from completion). Ask for both the VBA registration number and the project-specific DBI certificate of currency before you sign.

Melbourne Builder Guide

Double Storey Builders Melbourne

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A double-storey (two-storey) home is often the smartest way to fit more living space onto a narrow or valuable Melbourne block - common in established and infill suburbs where land is tight. It carries a premium over a comparable single-storey home for structure, stairs and scaffolding, but it buys space, views and separation you can't get on a small footprint.

When does a double-storey home make sense?

Double-storey designs suit narrow or small blocks, sloping sites, and buyers who want more floor area without a bigger footprint. They separate living and sleeping zones, can capture views and light, and preserve backyard space - but they cost more per m² and take longer than a single-storey home of the same size.

Benefits

More floor area on a smaller footprint
Ideal for narrow and valuable Melbourne blocks
Separates living and sleeping zones
Can capture views and northern light upstairs
Preserves backyard and garden space
Strong appeal in established inner/middle suburbs

Considerations

15-20%+ premium over a comparable single storey
Longer build for structure, stairs and scaffolding
Engineering and site access add complexity
Overlooking/overshadowing rules affect design (ResCode)
Planning permits more likely in established areas
Heating/cooling two levels needs planning

Double-storey home costs in Melbourne (2026)

Volume double storey (~240m²)$470,000 - $700,000

Semi-custom (~280m²)$650,000 - $1,000,000

Custom / premium (320m²+)$1,000,000 - $2,000,000+

Double-storey designs typically carry a 15-20% premium over a comparable single storey. Build-only (ex land, GST and site costs).

The Process

Design

Plan the two-storey layout to suit the block and ResCode

Engineering

Structural design for the upper level and stairs

Permits

Planning permit (if needed) and building permit

Contract

Fixed-price contract with clear allowances

Construction

Ground floor, upper floor, lock-up, fit-out

Handover

Inspection, defects and keys

What to Look For in a Builder

A portfolio of completed double-storey homes

Experience with narrow-block and infill sites

Strong engineering and site-access planning

Familiarity with ResCode overlooking/overshadowing rules

Transparent fixed-price contract

Recent completions you can inspect

First Home Buyers - Top tips for building your first home

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First Home Buyers - Top tips for building your first home

This episode is for First Home Buyers. We begin with essential finance tips and a rundown of the current government grants available. Then, we explain how to balance location with budget, and also touch on builder discussions, deposit amounts, your needs vs wants list and much more. Don't miss out on this invaluable advice for a successful first home build!

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Common Questions

Expect roughly a 15-20% premium over a comparable single-storey home of the same floor area. The extra covers upper-floor structure, stairs, scaffolding, more complex services and longer build time. On a tight or valuable block, that premium is often worth it for the extra space.