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Home extension design in Melbourne

Rework the home you love with practical layouts, careful connections between old and new, and a clear plan for the build.

Geelong - Alteration Additions - design visualisation

Your project, clearly planned

A home that grows with you.

An extension needs to work with the home you already have. We consider existing structure and levels, circulation, daylight and connections to the garden, alongside the practical challenges of joining new work to old.

How we can help

  • Rear extensions and larger living spaces
  • Second storey addition concepts
  • Existing-layout assessment and internal alterations
  • Indoor–outdoor connections and sustainability improvements

Your free quote identifies the design stages, survey or measurement needs and consultant reports. Engineering and the condition of the existing building inform the final details.

Geelong - Alteration Additions - design visualisation

From our portfolio

Geelong - Alterations and Additions

This Geelong design uses broad glazing to open living space to the outdoors. It shows how an addition can change the way a home meets its garden.

See more project designs

A good place to start

Plan the changes before you price the build.

Share your address, existing floor plans or photographs, and what no longer works in your home. We will discuss the options and quote the design services.

Get a free quote
Should I extend out or add a second storey?

That depends on your block, the current building and the space you need. A site review helps compare the options.

Will my extension need permits?

Check planning needs with the local council and building permit needs with a building surveyor. The rules depend on the work and site.

Can you help me plan before I get builder quotes?

Yes. An agreed design and clear drawings help a house extension builder understand the work. Share your budget goals early.

Planning information is general. Check the rules for your site.

Read the Victorian Government guidance

Connected services

Keep your next step in view.

Building and Plumbing Commission
CUSTOVIC GROUP PTY LTD
Registration CDB-U 48909
Victorian BPC registration

Start with a clearer plan

Plan well.
Build with confidence.

Talk to an experienced design and building team about your site. Start with a free quote for the services you need.

Get a free quote

YOUR FREE QUOTE

Request a free quote.

An address and a rough idea are a good place to start.

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Prefer a conversation? (03) 9364 6336