If you bought into one of the newer estates around here in the last few years, a granny flat is probably already on your mind. Granny flats in Edmondson Park and Carnes Hill have become a sensible second move for plenty of owners, whether the plan is extra rental income, a place for parents, or somewhere for an adult kid to land while they save.
This is a fresh-growth pocket of Liverpool, so the picture out here is a bit different to the older suburbs. Below is a practical look at what a local owner should know in 2026: the council picture, the kind of blocks you are working with, costs to budget for, and how we get a finished home to your backyard from just up the road.
Both suburbs sit inside Liverpool City Council. Edmondson Park is one of the newest release areas in the city, built up around the train station and the town centre, with Carnes Hill a little to the west and slightly more established. The streets here are the tidy, planned kind you get in modern estates, with footpaths, services already in the ground, and a mix of two-storey family homes.
The catch with newer estates is the blocks tend to be smaller and more uniform than the older parts of Sydney. A lot of land out here sits in the 300 to 500 square metre range, which makes your exact lot size the first thing to check before you get excited about a build.
Most blocks of 450 square metres or more in a residential zone can be approved through the Complying Development Certificate (CDC) pathway. A private certifier signs that off and it typically takes about 10 to 20 business days, which avoids a full council DA.
Because Edmondson Park and Carnes Hill blocks vary, some will clear the 450 square metre mark for CDC and some will not. If yours sits under it, or has an easement or drainage line running through, you may need a Development Application with Liverpool council instead. It is worth confirming your size and zoning early. You can read more about how granny flat approval works in NSW before you commit to anything.
Costs depend on your site and finish, so treat these as a guide rather than a quote. A complete, finished granny flat in Sydney usually lands between about $120,000 and $300,000. A base one or two-bedroom build is roughly $110,000 to $150,000, and per square metre you are looking at about $2,200 to $3,300 depending on spec.
On top of the build, budget for the usual extras:
One quiet advantage of a newer estate is that services are usually close and the ground is rarely full of sandstone, so the two big Sydney cost multipliers tend to behave themselves out here. For a fuller breakdown, see our notes on granny flat cost in NSW for 2026.
Our head office and display centre is at 1355 The Northern Road, Bringelly, which is a short hop from both suburbs. We build the home in our factory over about 8 weeks, then transport and install it on site in about 2 days, so your backyard is only really occupied for a couple of days.
That speed matters in a new estate, where you may have neighbours close on both sides and shared driveways. Less time with trades coming and going means less disruption for everyone. You can see how the whole thing runs on our our process page.
Because lots here can be tighter, the compact designs often work best. The two-bedroom Willow 55 with its pantry and optional carport fits neatly while still giving young families room to move, and the compact two-bedroom Black Wattle 50 is a good pick where space is tight. If your block clears the size for a full 60 square metre home, browse the wider range of designs to compare options.
Edmondson Park draws a lot of young families and first-home buyers, partly thanks to the train line into the city. That same crowd often wants either extra income to help with the mortgage or a flexible space for parents helping with childcare. Investor demand is steady too, which keeps rental interest healthy.
Often yes, but it depends on your exact lot size and setbacks. Smaller designs like a 50 square metre two-bedroom can suit estate blocks well. Confirm your block size and zoning with a certifier first.
Under the NSW Housing SEPP the maximum internal floor area is 60 square metres. Covered patios, verandahs and carports sit outside that figure, so a deck does not eat into your floor area.
Indicative Sydney granny flat rent in 2026 is roughly $450 to $650 per week depending on size, finish and location. Treat that as an estimate. There is more on the numbers in our guide to granny flat rental income in NSW.
If you own in Edmondson Park or Carnes Hill and want to know what fits, the best next step is a quick chat about your lot. Have a look at our granny flats and studios page to see what is possible, then contact us for a fixed quote based on your site. We are local, we have built modular and transportable homes in NSW for over 30 years, and we are happy to help you sort the right design and budget. Owners in nearby Fairfield and Campbelltown have gone the same way.
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