Start with the house, not the finishes. If you’re planning a renovation or extension in Melbourne, the first real question is whether the existing home can carry the brief you actually want. Gidaya Group works on whole-home renovations and extensions from $500k across Melbourne and Victoria.

When is renovating the right call?

Renovate when the house is worth keeping and the location is right.

That sounds obvious. It stops being obvious once feelings and cost get involved. A renovation earns its place when the existing structure, layout and street presence still support where you want the home to go, and when the work solves a real problem rather than refreshing what’s tired. Some homes have good bones and a bad floor plan. Others have a lovely street face and a rear that never worked. Those are renovation candidates. The house is doing more for you than it’s holding you back.

Attachment to a suburb is real, and it isn’t a design brief. Loving the street, the school run and the neighbours doesn’t tell you whether the walls can carry what you want next. Separate the two questions before you spend on drawings. Would you still choose this house if it sat on a different, equally good block nearby? If yes, the house has value of its own. If no, the location is doing all the work, and that’s worth knowing before the first sketch.

The test is honest, and it happens before the mood boards. What is the home actually preventing? More light, a better connection to the yard, room for the family to change shape over the next ten years, a kitchen that isn’t the bottleneck of the house. Name the problem first. The scope follows from that, not from a wishlist of finishes.

What can the existing house actually carry?

Every renovation hits the same wall eventually: what the old house will and won’t allow.

Structure, services and layout decide most of it. A wall you want gone might be holding the roof up. The switchboard and plumbing in a home that’s decades old are often closer to end of life than they look, and a serious renovation is the moment they get dealt with. The roof, the stumps or slab, the framing, the drainage, all of it sets the real starting line. A good builder reads that early, so you’re not discovering it halfway through demolition when the budget has no give left.

Four things get tested first. What’s under the house, what’s holding the roof up, what the services can actually handle, and what the title or an overlay allows. Stumps or a slab that have moved change the sequencing before a single wall comes down. A roof frame built for the load it already carries won’t take a second storey without engineering to prove it can. Undersized stormwater lines and single stack plumbing are common in homes built decades ago, and a renovation is usually the only point where fixing them is worth the disruption. Where a site sits under a heritage overlay, as Project Neville does in Carnegie, the street-facing form and materials carry extra weight in what council will approve, and that shapes the design before a builder prices a thing.

This is the same retain, change or rebuild test we run on every project. Project Dunbar, a renovation in Sunshine, is a case of the existing home having enough value worth keeping to make renovation the cleaner path. Project Neville in Carnegie, Project Victoria in Preston and Project Kenmore in Hoppers Crossing sit in the same frame: what stays, what changes, and what the house can carry into its next chapter.

Renovate, extend, or rebuild?

Sometimes the honest answer isn’t a renovation at all.

If the layout, structure and services are all fighting the brief, working around them can quietly cost as much as a fresh start without the freedom of one. That’s when a knockdown rebuild deserves a real look, or a move toward a custom home. It doesn’t mean the renovation loses. It means you choose it with open eyes, because you tested the alternative and the existing home still came out ahead.

An extension sits in the middle. It keeps what works and adds what’s missing, a second storey, a rear addition, a reworked living zone. The catch is marrying the old and the new so the join doesn’t read as an afterthought, and the old part often needs upgrading to meet the standard of the new. That’s a design and a build problem at once.

A second storey changes the sums twice over. The existing footings and frame have to prove they can take new load, and the ground floor usually needs opening up anyway to carry the stairs and the structure above it. That doesn’t take a second storey off the table. It means the decision gets made with real numbers in front of you, not after the roof’s already off.

How do you stage a renovation while you’re still living there?

Most renovations happen around a family still living in the house.

That changes how the job gets staged more than most owners expect. Wet areas and structural work usually come first, because they’re the parts you can’t do without for long. Kitchens and living zones often get sequenced so one part of the house stays usable while another is stripped back to the frame. Access matters here too. Where the site fence sits, where trades park, how dust and noise get managed next to bedrooms still in use. It’s not glamorous work, but it’s the difference between a smooth build and a stressed household.

Some families move out for the heaviest phase and move back once services and structure are settled. Others stay through the whole build. Either can work. What doesn’t work is finding out halfway through that nobody planned where everyone would actually sleep.

What changes the cost of a renovation?

Cost lives in the parts you can’t see from the street.

Access comes first. Getting materials in and rubble out of an established block, often with the family living there or nearby, changes how the work is staged and priced. Then the existing structure: the more the old house needs brought up to standard, the more of the budget goes into things that never show, like framing, services and waterproofing, before a single finish is chosen. Then scope creep, the quiet killer of renovation budgets, where “while we’re here” turns a focused project into a whole-house rebuild by another name.

What’s behind the plaster is the other variable. Older homes can carry asbestos sheeting, timber affected by rot or termites, or wiring that no longer meets current standards. Finding it isn’t unusual, and it shouldn’t derail the project. It does mean a realistic budget carries a genuine contingency, not a token one, and a builder who’s upfront about where that contingency is likely to get spent.

None of that means a renovation can’t be priced well. It means the price is only as good as the information behind it. The more the drawings, the structural assumptions and the selections are still moving, the more the number is really a set of allowances. A builder worth your time separates what’s known from what’s still open, so you can see what could move before you commit.

What should you ask before you engage a renovation builder?

Ask what they’d want to see before pricing.

A builder who asks for structural drawings, service locations and a straight answer on your budget range is testing the project properly. One who prices from a floor plan and a conversation is guessing. Ask how variations get handled once walls open up and something unexpected turns up, because on a renovation something usually does. Ask what sits inside the number and what sits outside it: permits, consultant fees, temporary services, make-good work on the parts you’re not touching. And ask how they’d stage the build around your family, not just around the trades.

What does the first conversation cover?

Not finishes. The decision.

A useful first conversation works out what the renovation is really for, what the existing home can carry, and whether renovation, extension or rebuild gives the cleaner outcome. It tests access and staging, flags where the old house is likely to need upgrading, and stays honest about which parts of the budget are firm and which depend on what’s found once walls open up. You don’t need finished drawings for that. You need enough to test the house properly.

Bring whatever you already have on the house too: an old set of drawings, a building inspection, photos of the roof space or the subfloor. It saves the first conversation from guessing at what the walls are hiding.

How do you start with Gidaya?

Send what you have. The suburb, photos of the existing home, any drawings, a rough budget range, and the part of the house that frustrates you most. From there the first conversation sorts the next move, whether that’s a renovation, an extension, a rebuild comparison or a preconstruction step to test the scope before you spend on design.

You can browse Projects for renovation context, read About Gidaya Group, or send your details through Contact. If the honest answer turns out to be a rebuild rather than a renovation, better to know that early than three months into the wrong project.

Not sure which of those you need yet? Say that too. Working it out together is part of the first conversation, not something you’re expected to arrive already knowing.

Frequently asked questions

What does Gidaya Group renovate?

Whole-home renovations and extensions from $500k across Melbourne and Victoria.

Should I renovate or rebuild?

Compare what the existing home can carry against the brief you want. Renovate when the house supports it. Rebuild when it keeps forcing compromise.

Can Gidaya build a second storey or extension?

Yes, second-storey and rear extensions, where the existing structure and planning allow.

What makes renovation costs move?

Access and staging, the condition of the existing structure and services, and scope creep once walls are opened.

Can Gidaya help before I have drawings?

Yes. Early input tests the house, scope and budget before design goes too far.

Talk through your renovation with Gidaya Group.

Written by the Gidaya Group team. Checked for accuracy before publishing. Updated 2026-07-08.