Home Extensions · Sydney
Home extensions in Sydney, done properly.
Rear and side extensions across Sydney by a licensed builder. Most extensions run $70,000 to $300,000 depending on size and how much of the existing structure has to change, itemised quote, honest programme, one builder from concept to handover.
Start here
Tell us about your home.
No sales pitch, no obligation. Here is exactly what happens when you enquire:
- 1Answer a few quick questions. One at a time, takes about two minutes, so the first conversation is about your project rather than the basics.
- 2We call you within 24 to 48 business hours. A builder, not a salesperson. Then we walk your home and yard with you on site.
- 3You receive a written, itemised estimate. Real numbers for your home. If the project does not stack up, we tell you that too.
From our clients
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.”
Extending out, not up
More space, on the ground you already own.
Strava Group builds home extensions across Sydney: rear additions, side extensions and whole-of-back transformations that open the house to the yard. Extending out suits homes with land to spare, and it is usually the fastest way to get a bigger kitchen, open plan living and a real connection to outside.
We regularly deliver:
- Rear extensions and additions
- Side extensions on wider blocks
- Open plan kitchen, dining and living
- Alfresco and indoor-outdoor connections
- New master suites and family rooms
- Laundries, mudrooms and storage done properly
- Structural openings between old and new
- Exterior upgrades to tie old and new together
Thinking about going up instead? That is a different build with different engineering, and we do that too: see second storey additions.
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 extension we run:
Every new-to-existing junction properly detailed
This is where most extensions crack, leak and part company with the house. It is almost always a detailing shortcut, not settlement. Ours get a proper structural tie, flashing and movement detail.
The existing structure gets rectified, not covered
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 and future cracking is designed out, not painted over.
Footings matched to the ground, not the minimum
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.
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.
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 home extension actually costs in Sydney.
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.
Preliminaries are the costs that exist before a single wall moves: site fencing, temporary services, waste removal, insurances, engineering and supervision. They are real, they are unavoidable, and a quote that does not show them separately has either buried them or forgotten them.
The band is wide because extensions are wide: a modest rear addition sits at one end, a full-width open plan transformation with structural openings back into the house sits at the other. How much of the existing structure has to change is usually the largest single factor, followed by wet areas and site access.
Every project is quoted properly after a site inspection. These ranges are here so you can decide whether it is worth a conversation.
Stay or go
Cheaper than moving, better than settling.
Once you account for stamp duty, agent commission, legal fees and moving costs, changing suburbs in Sydney frequently costs more than the extension that would have solved the problem, and you keep the street, the neighbours and the school catchment you already have.
An extension can also be staged alongside a full renovation of the existing rooms, you pay the preliminaries once and open the walls once. And if the block will not carry an extension, we tell you before you spend money on design, and talk honestly about whether going up is the better path for your home.
Service areas
Home extensions across Sydney.
We build extensions across 46 Sydney suburbs, concentrated in the north west, the Hornsby shire, the Ryde district, the inner west and St George. Select your suburb for local council information, the property types we see there and what extensions in that area typically cost.
The Hills District
Hornsby and the Northern Suburbs
Ryde, Hunters Hill and the North Shore
Inner West
- Home Extensions Ashfield
- Home Extensions Burwood
- Home Extensions Croydon
- Home Extensions Haberfield
- Home Extensions Summer Hill
- Home Extensions Strathfield
- Home Extensions Homebush
- Home Extensions Concord
- Home Extensions Cabarita
- Home Extensions Marrickville
- Home Extensions Dulwich Hill
- Home Extensions Leichhardt
- Home Extensions Drummoyne
- Home Extensions Five Dock
Parramatta
Southern Sydney and St George
Looking for a different service in one of these suburbs? We also build second storey additions and complete home renovations across the same areas. Not listed? We cover most of the Sydney metropolitan area. Get in touch and we will tell you honestly whether your location works for us.
Good to know
Home extension questions.
How much does a home extension cost in Sydney?
Do I need council approval for a home extension?
How long does a home extension take to build?
Can I live at home during the extension?
Should I extend out or go up with a second storey?
Will the extension match the existing house?
How will I know what is happening during my extension?
Are you licensed and insured?
Extend your home properly.
Ready for more room?
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.
