A licensed Melbourne renovation builder, built on trust
5J Building Group is a licensed home renovation builder serving homes across greater Melbourne. For over 20 years, we’ve helped homeowners transform tired properties into spaces that actually work for how they live — through home renovations, extensions, subdivisions and knockdown rebuilds.
We know renovation can feel daunting: the decisions, the trades, the budget uncertainty. Our approach is built around removing that stress. Every project is run by an experienced, well-organised team who manage the day-to-day so you don’t have to — from council approvals through to the final coat of paint.
Our approach
Fixed-price, no surprises. Before any work begins, you receive a clear, itemised quote. The price we agree at the outset is the price you pay — no hidden costs, no scope creep billed back to you later.
Experience across the full renovation spectrum. Whether it’s a single-room refresh, a full home renovation, a home extension, or a targeted kitchen or bathroom renovation, our tradespeople bring the same standard of workmanship and project oversight to every job.
On time, on budget. Our team actively monitors each project from start to finish, coordinating trades and timelines so your renovation stays on track.
Recognition. 5J Building Group is a registered building practitioner and holds an unlimited Domestic Builder licence (CDB‑U 73492), meaning we’re qualified to take on projects of any scale. We’re proud of the 5-star reviews we’ve earned on Google from homeowners we’ve worked with across Melbourne, a reflection of the quality and care we bring to every project.
Where we work
We work with homeowners right across Melbourne metro — from bayside suburbs like Brighton to inner and eastern pockets like Toorak, and everywhere in between. No two suburbs renovate the same way. Bayside properties often call for extensions that work with tight blocks and heritage overlays, while homes further inland tend to focus on opening up living spaces or adding a second storey to capture more room without expanding the footprint.
That local knowledge shapes how we scope every project. We understand council requirements can vary suburb to suburb, what character features are worth preserving in a period home, and how to plan a renovation that adds genuine value in your specific pocket of Melbourne — not just a generic finish.
View our recent renovation projects to see this approach in practice, from first quote to final handover.
Company
Contact
Brighton
Level 1, Suite 9/214 Bay Street, Brighton, VIC 3186
Toorak
Level 1, 459 Toorak Road, Toorak VIC 3142
info@5jbuilding.com.au
Domestic Builder (Unlimited) & CDB-U 73492
