Home Extensions · Cherrybrook NSW 2126
Home extensions in Cherrybrook, done properly.
Rear and side house extensions for Cherrybrook homes by a licensed extension builder. 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.
Start here
Tell us about your Cherrybrook 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 in Cherrybrook.
- 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
Cherrybrook blocks were made for extending.
Strava Group builds home extensions in Cherrybrook: rear additions, side extensions and whole-of-back transformations that open the house to the yard. Cherrybrook was built out mostly in the 1980s and 90s, which means substantial brick homes on generous, leafy blocks, many of them single storey at the rear with a backyard the original layout barely uses. The houses are younger than most we extend, but the brief is the same: the kitchen and living belong at the back, open to the garden, and the original plan rarely put them there.
In Cherrybrook 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.
Local knowledge
What we know about extending in Cherrybrook.
Every suburb builds a little differently. This is what matters when you are extending a Cherrybrook home.
Council
Cherrybrook sits in the Hornsby Shire Council area under the Hornsby Local Environmental Plan 2013 and the Hornsby Development Control Plan. Most detached homes on standard residential zoning can pursue a ground floor extension through Complying Development with a private certifier rather than a full DA, subject to setbacks, site coverage and landscaped area. Bushfire prone blocks backing the bushland reserves go to a DA. We confirm the pathway for your property before quoting. Current planning controls are published by Hornsby Shire Council and on the NSW Planning Portal.
Housing stock
Predominantly full brick and brick veneer homes from the 1980s and 90s, many of them substantial single and two storey houses on the original estate streets, with some earlier homes toward New Line Road. The typical plan has formal rooms at the front, a family room in the middle and a modest kitchen that never matched the size of the house. That is exactly the layout an extension is designed to fix.
Structure
Brick veneer homes of this era are straightforward to extend, with timber framed walls and trussed roofs that take a new structural opening well once the load path is engineered. Full brick homes need more care at the junction: we cut the openings cleanly, install engineered steel and tie the new frame into the existing brickwork properly. Split level homes, common on the sloping blocks, need the new floor levels planned carefully against the existing ones.
Yard and block
Blocks in Cherrybrook are typically 700 to 1,000 square metres, many of them sloping and backing onto reserves and bushland. The trees are protected under council controls and sometimes shape where the extension can go. The size of the block means a substantial rear extension is possible while keeping a real garden, and on the steeper blocks the extension often steps down the site.
Services and ground
Cherrybrook sits on shale derived clay soils that move with moisture, with sandstone near the gully lines. New footings on an extension have to be engineered for the site class, not copied from the original house, and detailed against the existing slab or strip footings so the two do not settle at different rates. Bushfire construction requirements apply on the blocks backing the reserves, and sewer lines often run along the rear boundary.
Value
Cherrybrook is one of the most tightly held family suburbs in the district, with the Metro, the school catchments and the block sizes protecting its value. A well built extension that gives a 1980s house the open plan rear it never had is one of the most reliable improvements you can make here, and it usually costs less than the stamp duty and agent fees involved in moving to a bigger house nearby.
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 Cherrybrook 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, and the clay soils across Cherrybrook make it more likely, not less.
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 house extension actually costs in Cherrybrook.
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.
In Cherrybrook the larger blocks and substantial houses tend to put projects in the middle and upper part of the band, with sloping sites and bushfire requirements on some blocks adding design and engineering work. How much of the existing structure has to change is usually the largest single factor, followed by wet areas and how far footings have to go to find good ground.
Every project is quoted properly after a site inspection. These ranges are here so you can decide whether it is worth a conversation.
Nearby We build extensions across The Hills and Hornsby and the surrounding suburbs. Select a suburb for local council information and what extensions there typically cost. Looking for a different service in Cherrybrook? We also build second storey additions and home renovations.
Home extensions near Cherrybrook.
The Hills and Hornsby
Good to know
Cherrybrook extension questions.
How much does a home extension cost in Cherrybrook?
Do I need council approval for an extension in Cherrybrook?
How long does a home extension take to build in Cherrybrook?
Can I live at home during the extension?
Should I extend out or add a second storey in Cherrybrook?
Will the extension match my existing brick house?
How will I know what is happening during my extension?
Are you licensed and insured?
Extend your Cherrybrook 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.
