Home Extensions in Melbourne
More space without leaving the street you love. Build One designs and builds ground-floor and second-storey extensions across Melbourne, from Kew and Toorak to Brighton and the Mornington Peninsula. Our own carpenters build it, our own joinery workshop fits it out, and one team runs it from first meeting to handover.
What we build
- Second-storey extensions: new bedrooms, retreats and ensuites added above your existing home.
- Ground-floor extensions: open-plan kitchen, living and dining spaces that open onto the garden.
- Rear and side additions: making the most of the block without overcapitalising.
- Period home extensions: contemporary additions to heritage homes, done to council requirements.
Why Build One
- Our own carpenters. Your extension is framed and finished by tradespeople we employ, not subcontractors we met last week.
- In-house joinery. Kitchens, wardrobes and built-ins come from our sister company, ARKO Joinery, keeping quality and timing under one roof.
- Early involvement. We work with your architect or designer from the start, picking up cost issues before they're locked into the drawings.
- Fixed-price or cost-plus — your choice. We'll walk you through both and recommend the contract that suits your project, your budget certainty and how involved you want to be in selections.
- Proven track record. Builders on The Block (3 awards) and Dream Home.
How it works
- Initial meeting and site visit
- Design and early cost planning with your architect
- Contract (fixed-price or cost-plus) and permits
- Construction
- Handover and defects period
Where we build
Toorak, Brighton, South Yarra, Malvern, Armadale, Kew, Hawthorn, Camberwell, Balwyn, Canterbury, Surrey Hills, Glen Iris, Caulfield, Elsternwick, Elwood, St Kilda, Sandringham, Black Rock, Red Hill, Portsea and the Mornington Peninsula.