One fixed price, in writing
A detailed fixed-price quote for the whole project before we start, with variations only on your written sign-off. The number we quote is the number you pay.
Extensions & Additions · Greater Sydney
Home extension builders in Sydney.
More space for the way your family lives now — added without the upheaval of moving house.
- Ground floor, first floor and upper-level additions — designed and built by one team
- A clean join between the original home and the new work
- Fixed-price quote, one project manager, guaranteed in writing
Free, no-obligation · same-day response · licensed & insured
Adding space to your home
Sydney’s home extension specialists.
Panadium designs, gains council approval for and builds home extensions across the city — we specialise in additions, not a referral service, so the project runs to a single fixed price and one schedule. From a ground floor extension that opens the home to the garden to an upper-level addition, we add space to homes end to end.
The Panadium standard
An extension built to match the original house.
Where new meets old, done cleanly. The difference between a good result and an obvious one is the join — so we treat the transition between the existing home and the new work as the most important detail on the job. Done well, it doesn’t just add a room — it reads as part of the original house.
- A seamless transition where new work meets the original house — rooflines, brick and render matched, not patched
- Structural engineering, council approval and construction managed under one roof
- The new rooms detailed to the same standard as the rest of the house
- Quality work that adds genuine value to your home, inside and out
Licensed & insured · fixed-price quote · guaranteed in writing
Why Panadium
One fixed-price contract, one project manager, no surprises.
A finish date you can hold us to
A staged program with a finish date, one project manager and trades coordinated in-house, so the build keeps moving and your home stays liveable as long as possible.
Structural engineering and council approval, in-house
The same expert team designs the structure, lodges the DA and builds it, so nothing waits on an outside engineer or a separate approvals consultant — a commitment to quality carried through to a smooth and stress-free build, delivered within budget under one fixed-price contract.
How it works
Design, approval and build — one fixed program, one finish date.
Free consultation
We visit, look at the house and how you want to use the new space, and talk through what’s possible on your site.
Design & fixed quote
A design for the new space, structural advice, material selections and one fixed-price quote for the whole project.
Approval & build
We prepare and manage the council approval, then build to a clear program.
Handover & guarantee documents
A full walkthrough, your compliance certificates and guarantee, and a new space that feels like it was always there.
What we add
Extension types: ground level to second storey.
Extend out, extend up, or do both at once.
Ground-level additions
Rear and side work that opens the home to the garden — a bigger kitchen, living and dining space with an easy indoor-outdoor flow.
First floor additions
Add a full upper level with bedrooms, bathrooms and living space without reducing your usable backyard.
Rear & side additions
Targeted work that solves a specific problem — a new main suite, a home office or a family room — built to read as part of the original house.
Renovation and extension in one
A new wing and a full remodel as one project — extend the footprint and bring the home up to the same standard, under one fixed-price contract.
Who builds it
One project manager, from first sketch to handover.
One Panadium project manager handles all project management in-house — you work closely with one point of contact, from first sketch to handover.
Our guarantees, in writing
- Quality guaranteed on every trade
- Waterproofing certified to AS 3740
- Fixed completion date in your contract
- Licensed builder · HBCF cover · fully insured
Our work
Extensions and additions we’ve built.
Real Panadium extensions across the city — photographed on site and published with our clients’ consent.
Castle Hill Extension on a Sloping Block
A steep, sloping block reworked into a home with cohesive indoor and outdoor living across its levels.
Darlington Terrace & Rear Studio
An inner-west terrace with a separate rear studio, opened up at the back onto a new deck.
Summer Hill Terrace, First-Floor Addition
A compact Summer Hill terrace gains a new upper level and a brighter, more open ground floor.
Bronte First-Floor Addition
A full upper level and a new balcony, added on the same footprint.
Cherrybrook Second-Storey Addition
A family home doubles its accommodation by going up, not out — the same block, a whole new upper level.
Lindfield Lower-Ground Addition
A sloping block gains a new lower-ground level, with a bathroom, an internal staircase and a paved patio built into the fall of the site.
Client reviews
What homeowners say about their build.
“They were punctual, experienced, fair, and the best at what they do. I was genuinely very satisfied with their work.”
“We chose Panadium Homes after speaking with a few builders, and it was the best decision we made. Everything was handled professionally, and there were no hidden costs or unexpected issues.”
“Great experience with Panadium Homes. Clear communication, no surprises, and a really high-quality finish.”
Credentials
Licence 270181C, $20M cover, USyd-prequalified.
Builder licence, insurance, HBCF cover and accreditation carried on every extension project.
NSW Licensed Builder
Licence No. 270181C — New South Wales Fair Trading
HBCF Cover · icare
Home Building Compensation cover on every insurable project
Tender-Prequalified
Prequalified on the USyd tendering panel
Master Builders
Member — Master Builders Association
HIA Member
Member — Housing Industry Association
$20M Public Liability
Fully insured — certificates of currency on request
Transparent pricing
What an extension costs in Sydney.
Every home and site is different, so we don’t publish a single figure. We publish the method and the three scopes that shape it.
Ground level
Extending the footprint at ground level — a bigger living area, kitchen or main suite opening to the garden.
Upper-level additions
Adding a level — bedrooms, bathrooms and living up top, with the structure and staircase engineered in.
Extension and renovation
A new extension plus a complete home renovation, delivered as one fixed-price project.
Fixed price before work begins · never an open-ended estimate.
Where we build
Extensions across Greater Sydney.
From North Shore and Inner West builds to the Eastern Suburbs, Hills District and the west.
North Shore
Lindfield · Willoughby · Lane Cove · Pymble · Wahroonga
Inner West
Summer Hill · Haberfield · Balmain · Five Dock · Marrickville
Eastern Suburbs
Bronte · Woollahra · Randwick · Paddington · Bondi
Hills District
Castle Hill · Cherrybrook · Baulkham Hills · Kellyville
Ryde & Hunters Hill
Ryde · Carlingford · Epping · Gladesville
Western Sydney
Parramatta · Penrith · Blacktown
Northern Beaches
Manly · Frenchs Forest · Dee Why · Avalon
Sutherland Shire
Cronulla · Caringbah · Sutherland · Kogarah
Good to know
Extension FAQs.
How much does a home extension cost in Sydney?
There’s no single honest figure — a ground-floor extension and a full upper-level addition are very different projects, and your site, access and structure all move the number. We give you a detailed fixed-price quote for your exact project before any work starts, so homeowners know the real cost, not a per-square-metre teaser.
Is it better to extend out or add an upper level?
It depends on your block, your budget and what you need. Going out at ground level is often simpler and keeps everything on one level; a first-floor or upper-level build adds space without losing garden. We assess your site in person and tell you which makes more sense for your place.
Can we live in the house during the build?
Usually, yes. We stage the build and keep the house weather-tight and liveable while the new level goes up — for example building up over a house you’re still living in. For larger projects we’ll tell you plainly when it’s simpler to move out for a period.
Do you handle the design, council approval and engineering?
Yes — design, structural engineering, council approval and construction all sit with one project manager, so you’re not coordinating a separate architect, engineer and trades yourself.
Will the new work match the house?
Yes. We match rooflines, brickwork, render and finishes so the new work reads as part of the original home, not an obvious add-on.
Do you extend and renovate at the same time?
Often, yes — building the extension and renovating the house as one project means one set of trades and one finish standard throughout.
Are you licensed and insured for structural building work?
Yes. Panadium holds Licence 270181C, $20M public liability cover and provides HBCF cover on every insurable project, guaranteed in writing.
Free fixed-price quote
Tell us about your home.
Send a few details and a Panadium project manager will call you today — a free on-site consultation and a fixed-price quote for your extension.
- Same-day response, seven days
- Fixed price before any work starts
- Free, no-obligation — keep the quote either way
Prefer to talk it through? (02) 9433 1212