Home Extensions · Toongabbie NSW 2146
Home extensions in Toongabbie, done properly.
Home extensions in Toongabbie by a licensed builder who confirms the council and the creek flood level before design. Most extensions run $70,000 to $300,000 depending on size and how much of the existing house has to change, itemised quote, honest programme, one builder from concept to handover.
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Three councils, one suburb
Extending a Toongabbie home.
Strava Group builds house extensions in Toongabbie: bigger family rooms, bedroom and bathroom wings, suites for extended family and covered outdoor areas. Toongabbie is split between three councils, with the railway line marking part of the boundary, and lots near Toongabbie Creek can carry flood planning controls. Both change what an extension can be, so we confirm them before any design work.
Extensions we build for Toongabbie homes:
- Rear family room and kitchen extensions
- Extra bedrooms and bathrooms
- Extensions designed to flood floor levels
- Replacing old rear additions
- Ground floor suites for extended family
- Covered outdoor rooms
- Structural openings in the rear wall
- Exterior work to tie old and new together
If the house is big enough and the inside is what needs work, see home renovations in Toongabbie. If the yard has to stay, see second storey additions.
The first question on a Toongabbie extension is which council you are in. The second is how close the creek is. Get those answered properly and the rest of the design follows easily.
Quick Answer
Most home extensions in Toongabbie run $70,000 to $300,000 depending on size and how much of the existing structure has to change, at roughly $2,500 to $4,500 per square metre for ground floor work, with around $30,000 in preliminaries (design, engineering and council approvals, plus site set-up) on top. Meeting a flood floor level, building near the sewer main and removing old additions are the main cost drivers here.
Local knowledge
What we know about extending in Toongabbie.
Toongabbie needs more checking before design than most suburbs. This is what we look at.
Three councils
Toongabbie is shared by the City of Parramatta Council, with about 8,000 residents, Blacktown City Council, with about 5,200, and Cumberland City Council, with about 4,000. Each has its own LEP and development controls, so setbacks, site coverage and approval steps depend on which side of the boundary you are on. See City of Parramatta Council, Blacktown City Council, Cumberland City Council and the NSW Planning Portal.
Toongabbie Creek
Some lots near Toongabbie Creek and its tributaries carry flood planning controls. These come through each council’s LEP flood clauses, flood studies and DCP, and the planning certificate shows whether they apply. Where they do, the new habitable floor is set at or above the flood planning level.
A mix of homes
Older cottages, post-war homes and later brick houses sit side by side in Toongabbie, many with earlier additions at the back. We inspect what the existing rear wall and any old additions stand on before deciding what stays and what is replaced.
Raised floors near the creek
If the flood level is higher than the existing floor, the new rooms sit above the old ones. Treated well, that becomes a feature: two or three steps up into a family room or bedroom wing with its own ceiling height. We model the levels on a cross section early so the change is planned.
Below the yard
Before we draw anything, we order a sewer service diagram from Sydney Water and trace the line on site. If the extension footprint crosses the main, the design either steps around it or the footings are built to Sydney Water’s requirements, which affects both cost and approval time.
Extended families
Ground floor suites at the back of the house are a frequent request, giving an older parent or a grown up child their own bedroom and bathroom while sharing the kitchen. Placing the suite near the existing plumbing keeps the cost down.
Start here
Tell us about your Toongabbie home.
No sales pitch, no obligation. Here is exactly what happens when you enquire:
One at a time, takes about two minutes, so the first conversation is about your project rather than the basics.
The Strava standard
How we build differently.
An extension lives or dies at the junction between old and new. We build for longevity, and on every Toongabbie extension we run:
Every new-to-existing junction properly detailed
This is where most extensions crack, leak and part company with the house, and the cause is almost always a detailing shortcut. Ours get a proper structural tie, flashing and movement detail.
The existing structure gets rectified first
Where the extension meets the house, we screw off and re-brace the adjoining structure, tying new and old together so the whole building moves as one. Future cracking gets designed out at frame stage instead of patched at the paint stage.
Footings engineered for the ground they sit on
New footings are engineered for your soil and detailed against the existing ones, because differential movement between old and new slabs is the classic extension failure, and it matters more on an older house whose original footings were never engineered to modern standards.
Furring channels for a dead flat finish
Where new ceilings and walls run through to existing rooms, furring channels give one level plane across both, so you cannot see where the house ends and the extension begins.
Waterproofing is a documented hold point
New wet areas are inspected and photographed before a single tile goes on, to AS 3740, and new roof-to-old-roof junctions get the same treatment.
Everything photographed before it is covered
You receive the record at handover, so in ten years you know exactly what is behind your walls and under your floor. Want more than photos? We can also capture a full 3D virtual model of the frame, plumbing, wiring and waterproofing before the plasterboard goes on, available as an optional add-on.
Before starting Strava Group, I spent seven years on the tools as a carpenter and five years running sites. The failures I kept seeing in extensions were always at the join: cracked cornices along the old wall line, roofs that leaked where new met old, floors that stepped as slabs settled differently. None of it was illegal. All of it was avoidable. None of this shows up in a finished-room photo. All of it shows up in year seven.
Honest numbers
What a house extension actually costs in Toongabbie.
Most builders will not put numbers on a website. We will, because the alternative is wasting your time and ours across three meetings before anyone mentions a figure.
| Item | Typical range |
|---|---|
| Home extension, depending on size and scope | $70k–$300k |
| Ground floor extension work | $2,500–$4,500 /m² |
| Preliminaries, on top of build cost | approx. $30,000 |
Preliminaries are the costs that exist before a single wall moves: design, engineering and council approvals, plus site set-up such as site fencing, temporary services, waste removal, insurances and supervision. They are real, they are unavoidable, and a quote that does not show them separately has either buried them or forgotten them.
In Toongabbie, flood floor levels, removing earlier additions and the sewer location tend to put projects in the middle of the band. The balance depends on how much of the existing structure has to change, plus any bathrooms or laundries you add.
Every project is quoted properly after a site inspection. These ranges are here so you can decide whether it is worth a conversation.
Good to know
Toongabbie extension questions.
Rated 5.0 on Google.
We had Strava Group complete major renovation works on our property and were blown away with the quality. The attention to detail and overall finish were amazing.
Great communication, honest work, easy to work with, highly recommend to work with for any new build/renovations. If you are looking to get work done without worrying about shortcuts Strava Group is builder to use.
I highly recommend Strava Group to everyone great workmanship, reliable service, and I couldn’t be happier with the result.
I couldn't be happier with the work from Strava Group. From the beginning, Stav and the team was friendly, honest, and super easy to deal with.
We engaged Strava Group for a home extension and renovation. We are incredibly happy with the service and the results we achieved. From day one Stav and team where always willing to help with any issues we had and we loved that the main focus was as quality and longevity. Highly recommended
Had a great experience with Strava Group. The team was easy to deal with, super professional, and kept me in the loop the whole way through. They really listened to what I wanted and made the whole process feel smooth and stress-free.
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Nearby
Home extensions near Toongabbie.
We build extensions across Parramatta, Blacktown and the surrounding suburbs. Select a suburb for local council information and what extensions there typically cost.
Parramatta and Blacktown
The Hills District
Hornsby and the Northern Suburbs
Ryde, Hunters Hill and the North Shore
Inner West
Parramatta
Western Sydney
Southern Sydney and St George
Looking for a different service in Toongabbie? We also build second storey additions and home renovations in Toongabbie.
Extend your Toongabbie home properly.
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Tell us about your property and what you want to add. We respond within 24 to 48 business hours with honest advice and real numbers, no cost, no obligation.
More in Toongabbie
Other Strava Group services in Toongabbie
Each page covers the local council, the homes we see in Toongabbie and what that kind of project typically costs.