Home Extensions · Penshurst NSW 2222
Home extensions in Penshurst, done properly.
Rear and side house extensions for Penshurst 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 Penshurst 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 Penshurst.
- 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 room at the back of a Penshurst home.
Strava Group builds home extensions in Penshurst: rear additions, side extensions and whole-of-back transformations that open the house to the yard. Penshurst is classic St George: interwar brick bungalows and Federation cottages on the older streets, a big stock of post-war full brick built by the families who settled here, and blocks that are deeper than they look. The front halves of these houses are worth keeping. The back halves, where the kitchens were squeezed in, are where the extension earns its money.
In Penshurst 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 Penshurst.
Every suburb builds a little differently. This is what matters when you are extending a Penshurst home.
Council
Penshurst sits in the Georges River Council area under the Georges River Local Environmental Plan 2021 and the Georges River 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, with heritage items going to a DA. We confirm the pathway for your property before quoting. Current planning controls are published by Georges River Council and on the NSW Planning Portal.
Housing stock
Interwar brick bungalows and Federation cottages on the older streets near the station, a large stock of 1950s and 60s full brick and brick veneer homes, and some later two storey houses. Many carry a lean-to, sunroom or enclosed verandah from decades ago that was never built to last. Those earlier additions usually come off and are replaced with something engineered.
Structure
Mid-century brick veneer homes are straightforward to extend once the load path is engineered. The older full brick and interwar houses need more care at the junction: we cut the openings cleanly, install engineered steel and tie the new frame into the existing brickwork properly, and the new floor has to meet an old suspended floor exactly.
Yard and block
Standard Penshurst blocks are typically 450 to 700 square metres, often deeper than they are wide. That leaves room for a full width rear extension while keeping a real backyard. Side access is usually workable, and where it is tight materials come through the house and the programme changes.
Services and ground
Penshurst sits on shale derived clay soils that move with moisture, with sandstone toward the ridge 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 footings so the two do not settle at different rates. Sewer lines often run along the rear of the block and are located before design starts.
Value
Penshurst is a well connected St George suburb with the station, the schools and the village strip holding demand, at a friendlier entry point than the waterfront suburbs nearby. A well built extension that converts a dated rear layout into open plan living with a genuine yard connection 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.
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 Penshurst 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 Penshurst 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 Penshurst.
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 Penshurst the block sizes support a proper open plan rear rather than a single room, which tends to put projects in the lower and middle part of the band, with older full brick houses adding to it. How much of the existing structure has to change is usually the largest single factor, followed by wet areas and access.
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 St George and the surrounding suburbs. Select a suburb for local council information and what extensions there typically cost. Looking for a different service in Penshurst? We also build second storey additions and home renovations.
Home extensions near Penshurst.
St George
Good to know
Penshurst extension questions.
How much does a home extension cost in Penshurst?
Do I need council approval for an extension in Penshurst?
How long does a home extension take to build in Penshurst?
Can I live at home during the extension?
Should I extend out or add a second storey in Penshurst?
Will the extension match my interwar brick house?
How will I know what is happening during my extension?
Are you licensed and insured?
Extend your Penshurst 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.
