Home Extensions · Bossley Park NSW 2176
Home extensions in Bossley Park, done properly.
Home extensions in Bossley Park by a licensed builder with a renovation underway in the suburb right now. 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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Building out at ground level
Room to extend on a Bossley Park block.
Strava Group builds house extensions in Bossley Park: rear family rooms, side additions, master suites and alfresco roofs tied into the house. The suburb suits extending better than most. Residential lots are zoned R2 Low Density, about three quarters of them measure 550 to 750 square metres, and on that size a full width rear addition usually still leaves a proper yard behind it.
Extensions we build for Bossley Park homes:
- Rear family room and kitchen extensions
- Side extensions where the driveway allows
- Master suites with ensuite and robe
- Alfresco roofs tied into the existing roof
- Replacing old pergolas and patio roofs
- Structural openings in brick rear walls
- Laundries and mudrooms off the garage
- Exterior work so old and new read as one
Want the extra space upstairs instead? That is a different build with different engineering, and we do that too: see second storey additions. If the size is fine and the layout is the problem, our home renovations in Bossley Park page covers reworking what you already have.
The usual Bossley Park brief: a solid brick home with a tired patio roof out the back and a kitchen facing the wrong way. The patio comes down, the rear wall opens up, and the family room goes where the pergola stood, with lawn still left over.
Quick Answer
Most home extensions in Bossley Park 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. Replacing an old patio roof, opening the brick rear wall and adding a bathroom are the things that move the figure most here.
Local knowledge
What we know about extending in Bossley Park.
Bossley Park is one of the easier suburbs in the west to extend in, provided a few things are checked early. Here is what we look at.
Council and zoning
Bossley Park sits in the Fairfield City Council area under the Fairfield Local Environmental Plan 2013, with the residential streets zoned R2 Low Density. The Fairfield LEP has no heritage conservation areas, so most single storey rear and side extensions here can be certified privately as Complying Development. A lot with flood related or other site specific controls goes to a DA instead. Controls are published by Fairfield City Council and on the NSW Planning Portal.
Block sizes
Roughly 75% of Bossley Park lots fall between 550 and 750 square metres. On that size, an extension of 30 to 50 square metres usually fits within the setback and landscaped area rules. On the smaller lots, the landscaped area requirement tends to cap the footprint before the side setbacks do, so we measure it first.
Housing stock
Most streets are brick family homes, single and double storey, with tiled roofs. A lot of them carry an original pergola or patio roof that was never designed to be enclosed. We take those down and build the new room from its own footings up, which costs a little more than walling in a patio and lasts a great deal longer.
Getting machinery in
An extension needs an excavator, a concrete pump line and materials delivered to the back of the block. Where the driveway runs down one side, that is easy. Where both sides are tight, we plan for a smaller machine and more hand work, and it appears as a line in the quote from day one.
Footings and floor levels
Clay is common in this part of western Sydney and it moves as it wets and dries, so every extension gets a geotechnical site classification and footings engineered to it. The new slab is detailed against the old one so both halves move together, and the new floor is set to finish flush with the existing house.
Current work here
We have a renovation running in Bossley Park now, so the certifiers, inspection timing and drainage connections in this council area are current knowledge for us. When we price an extension here, the numbers come from live work in the same suburb.
Start here
Tell us about your Bossley Park 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 Bossley Park 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 Bossley Park.
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 Bossley Park the regular lots and workable access keep extensions efficient, so many projects land in the lower to middle part of the band. How much of the existing structure has to change is the biggest lever, then wet areas, the roof tie-in and how easily machinery reaches the back.
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
Bossley Park 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.
Aloona T.
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Nearby
Home extensions near Bossley Park.
We build extensions across the Fairfield area and the surrounding western suburbs. Select a suburb for local council information and what extensions there typically cost.
Fairfield and western Sydney
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 Bossley Park? We also build second storey additions and home renovations in Bossley Park.
Extend your Bossley Park 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 Bossley Park
Other Strava Group services in Bossley Park
Each page covers the local council, the homes we see in Bossley Park and what that kind of project typically costs.