Home renovations on the Central Coast: a homeowner’s guide

A home renovation on the Central Coast can be the best decision you make for your family, or the most stressful. The difference is almost always in the choices you make before the first tool comes out. This guide walks through what a Central Coast home renovation actually costs, how long it takes, when you need council approval, and how to choose the specialist who will do it properly.

At Ace Building Co, renovating existing homes is not a service we offer alongside other work. It is our specialism. Every principle in this guide comes from projects we have delivered from Wamberal to New Lambton.

What counts as a home renovation?

Renovation is a broad word. On the Central Coast, we typically see homeowners considering one of four scopes:

• Single-room renewal. A kitchen or bathroom refreshed with new joinery, tapware, tiles and appliances, without moving structural walls.
• Multi-room reconfiguration. Rework of a kitchen, living and dining area to open up the space and improve the way it lives, often with new flooring and joinery throughout.
• Whole-home renovation. A complete refresh of the existing footprint including bathrooms, laundry, kitchen, living, bedrooms and finishes, sometimes with minor structural changes.
• Renovation plus extension. A whole-home renovation combined with a ground-floor or first-floor addition. See our home extensions guide for more on the extension side.

Central Coast renovation cost bands (2026)

Every project is different, but these are the honest ranges we see for renovations delivered by a licensed Central Coast specialist in 2026:

• Kitchen refresh: $40,000 to $85,000.
• Bathroom renovation: $30,000 to $75,000. See our bathroom cost guide for a full breakdown.
• Kitchen, living and dining reconfiguration: $120,000 to $250,000.
• Whole-home renovation: $250,000 to $600,000, depending on size, structural change and finish level.
• Renovation plus extension: $400,000 and up, depending on the extension footprint.

How long does a Central Coast renovation take?

Timeline anxiety is the second-biggest concern homeowners bring to us, after cost. Realistic timelines for renovations on the Central Coast look like this:

• Design and documentation: 4 to 12 weeks. Longer for whole-home renovations with structural change.
• Approvals (CDC or DA where required): 4 to 16 weeks depending on council and scope. Complying Development is faster.
• Selections (tiles, tapware, joinery finishes): 4 to 8 weeks, ideally in parallel with approvals.
• Trade lead time (custom joinery, imported fixtures): 8 to 16 weeks. This can be the bottleneck if not started early.
• On-site construction: 6 to 12 weeks for a kitchen or bathroom; 4 to 6 months for a whole-home renovation.

Our best advice: start conversations 6 to 9 months before you want the work to begin. That gives everything room to breathe, and protects you from the compressed programs that cost more and land worse.

Do you need council approval for a Central Coast renovation?

Not always. NSW has three tiers of approval:

• Exempt Development. Small internal works (swapping a vanity, retiling within the existing footprint) may not need any formal approval at all.
• Complying Development (CDC). Many bathrooms, kitchens and internal renovations that stay within the existing footprint qualify as Complying Development under the NSW Codes SEPP. A private certifier can approve these in 20 business days.
• Development Application (DA). Larger renovations, anything that moves external walls or windows, or work on heritage or environmentally-sensitive sites usually requires a DA through Central Coast Council.

A specialist builder should assess this at your first site visit and give you a clear recommendation. If you are unsure, the right questions to ask flush out builders who are not on top of this. Ask about their NSW builder licence, their HBCF cover, and their approach to certifier engagement before you sign anything.

Fixed-price vs cost-plus contracts

Every renovation we deliver at Ace is on a fixed-price contract. Cost-plus is more common with new home builds and less protective for the homeowner in a renovation, because the scope is easier to underestimate without the pricing pressure a fixed quote creates. Fixed-price forces us to think carefully about every inclusion and assumption before we sign. That protects both sides.

What separates a specialist from a generalist builder

The Central Coast has plenty of good general builders. There are fewer specialists who focus their business on renovating existing homes. Here is what to look for:

• A portfolio of renovations, not new builds. Ask to see the last five projects. If four of them are new homes on vacant blocks, you are hiring a new-home builder.
• An approach to living in the home during works. Specialists have systems for dust screens, floor protection, staged work and daily clean-downs. Generalists often do not.
• Trades who work with existing structures. Renovation carpenters, plumbers and electricians who are comfortable working around what is already there, not just building new.
• Fixed-price contracts, as above.
• References from renovation clients. Not just from new-home clients.

The Ace Building Co approach

Our whole business is centred on transforming existing homes into exceptional places to live. It is what we care about, and what we have built our reputation around across the Central Coast.

Every Ace renovation is fixed-price, run on a weekly-update cadence, and delivered with surface protection as standard. The team is small enough that Corey is on your site every week, and Laura runs the client-facing side so nothing falls through the cracks.

Ready to start the conversation?

The best renovations start with an honest first conversation. Tell us about your home, what you want to change, and roughly when you would like to start. We will come to site, listen, and give you a clear read on cost, timeline and approval path before anyone signs anything.