Home Extensions · Bella Vista NSW 2153
Home extensions in Bella Vista, done properly.
Home extensions in Bella Vista by a licensed builder, for late nineties and two thousands homes that need more living space at ground level. 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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More room on a modern lot
Adding space to a Bella Vista home.
Strava Group builds house extensions in Bella Vista: family rooms pushed out into the yard, ground floor guest suites, bigger kitchens and covered outdoor rooms built as part of the house. Most homes here went up in the late 1990s and 2000s, many of them large two storey houses on estate lots. The structure is young and sound, so an extension comes down to how much of the lot the planning rules leave you, and how cleanly the new roof meets the old.
Extensions we build for Bella Vista homes:
- Rear family room extensions
- Ground floor guest suites with ensuite
- Kitchen and meals area extensions
- Alfresco areas rebuilt as real rooms
- Home offices off the main living area
- Butler’s pantries and storage
- Wider openings to the outdoor area
- Brick, tile and render matched to the original
Enough room already, with a kitchen and bathrooms that look their age? That is covered on our home renovations in Bella Vista page. On single storey homes where the garden must stay intact, second storey additions give you the space upstairs.
The common Bella Vista request: the alfresco gets used every day, so make it a real room. That means its own footings, a roof tied properly into the house and insulated walls that hold the warmth in winter.
Quick Answer
Most home extensions in Bella Vista 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. Tying into a two storey rear wall, adding an ensuite and rebuilding an alfresco on new footings push the figure up most in Bella Vista.
Local knowledge
What we know about extending in Bella Vista.
Bella Vista homes are young, so an extension here is mostly planning and matching. This is what we check.
Council and approval
Bella Vista sits entirely in The Hills Shire Council area under The Hills Local Environmental Plan 2019. Across the residential estates, a rear or side addition that fits the code limits commonly gets a Complying Development Certificate from a private certifier. Heritage, bushfire or other site specific controls on a lot send it to a DA. Controls are published by The Hills Shire Council and on the NSW Planning Portal.
Around the Metro and Norwest
The Metro station and part of the Norwest business precinct sit inside the suburb, with the housing around them, and the station precinct is adding apartments. For owners of a detached house, that makes keeping the land and adding to the home worth pricing before any decision to sell.
Housing stock
Most homes date from the late 1990s and 2000s, typically brick veneer on concrete slabs, and many are two storey with the kitchen and family room across the back. A slab makes level matching simple, and brick veneer opens up cleanly once the engineer has sized the beam over the new opening.
Site coverage and setbacks
Large homes on estate lots often cover much of the land already. The landscaped area and private open space rules are usually what cap an extension here, ahead of the boundary setbacks, so we measure your lot against them on the first visit and tell you how much room is really available.
Restrictions on title
Newer estates often carry restrictions on the title, recorded in an 88B instrument, covering things like external materials, fencing and building lines. We read the title before design, because a covenant can rule out a layout that council would otherwise approve.
Roof tie-in on two storey homes
On a two storey house, the new single storey roof runs into a brick or rendered wall at the back. That junction needs a stepped flashing let into the mortar joints, and it is where cheaply built extensions leak first. We detail it, then photograph it before anything covers it.
Start here
Tell us about your Bella Vista 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 Bella Vista 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 Bella Vista.
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 Bella Vista the young structure keeps hidden costs low, so most projects land near the centre of the range. A two storey roof junction and an ensuite in the new wing add the most. How much of the existing structure has to change decides the rest, starting with how wide the opening into the house needs to be.
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
Bella Vista 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.
Google review
Orom Gabriel
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Jonathan
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Clara Shabow
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Jonathan Jajo
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Eli Kosso
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Nearby
Home extensions near Bella Vista.
We build extensions across The Hills and the surrounding suburbs. Select a suburb for local council information and what extensions there typically cost.
The Hills
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 Bella Vista? We also build second storey additions and home renovations in Bella Vista.
Extend your Bella Vista 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.
More in Bella Vista
Other Strava Group services in Bella Vista
Each page covers the local council, the homes we see in Bella Vista and what that kind of project typically costs.