The Macarthur region has quietly become one of the best parts of Sydney to build a second dwelling. Granny flats in Macarthur stack up because the land is more affordable than the inner suburbs, the blocks are often generous, and the area is growing fast with families who want flexible living arrangements close by.
If you own in Campbelltown, Camden or Wollondilly and you are weighing up a granny flat, this 2026 guide covers the council picture across the region, the kind of blocks you are working with, the costs to budget for, and how we deliver a finished home from our factory just down the road at Bringelly.
Macarthur takes in three local government areas in Sydney's south west: Campbelltown City Council, Camden Council and Wollondilly Shire Council. Each has its own flavour. Campbelltown holds the established suburbs and a chunk of the growth corridor, Camden mixes older town pockets with brand new estates around the south west growth area, and Wollondilly is the leafier, semi-rural end with larger landholdings.
The common thread is space. Compared to most of Sydney, land out here is more generous, and that has a lot to do with why granny flats have taken off across the whole region.
In the older Campbelltown suburbs you will often find blocks of 600 to 800 square metres or more. Wollondilly can run much larger again, with semi-rural lots that give you plenty of placement choice. The newer Camden estates are the exception, with tidier blocks closer to 300 to 500 square metres, so on those it pays to check your exact size.
Bigger land usually means an easier approval, more room to position the build for north-facing living, and simple side access for delivery. That is a real advantage out here.
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, rather than a full council DA.
Plenty of Macarthur blocks clear that 450 square metre mark comfortably, so the CDC route is common across all three council areas. Larger semi-rural Wollondilly lots can carry their own quirks, like bushfire mapping or different zoning, so those are worth a closer look. We always recommend confirming the specifics with a certifier. There is more in our guide to how granny flat approval works in NSW.
Pricing depends 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:
The two things that move the number most in Sydney are sandstone or rock in the ground, and how far your services have to run to reach the sewer. Many flatter Macarthur blocks behave well on both counts, though larger rural lots can have longer service runs. For a fuller breakdown, see our notes on granny flat cost in NSW for 2026.
Our head office and display centre sits at 1355 The Northern Road, Bringelly, right on the doorstep of the Macarthur region. 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 is the big advantage of going factory-built and transportable. No months of trades, no long stretch of mud and noise, and far less disruption to the family in the main house. You can see how it all runs on our our process page.
With the space most Macarthur owners have, the full 60 square metre two-bedroom homes are popular. The Snow Gum 60 with its island bench and separate laundry is a comfortable choice for parents or a quality rental, and the open-plan Jacaranda 60 with its verandah suits owners who want a light, airy feel. On the tidier Camden estate blocks, a compact design fits better. Browse the full range of designs to compare.
Macarthur has both family-living and investor demand, which is part of why it has grown so fast. Owners build to keep elderly parents close, to give adult kids a stepping stone, or to earn rental income in a growth area. A second dwelling can serve all three over the years.
All of them. Campbelltown, Camden and Wollondilly sit under the same NSW Housing SEPP, so the 60 square metre limit and the CDC pathway apply across the region, subject to your block meeting the criteria.
Generally land in Macarthur is more affordable than inner Sydney, and blocks are often larger, which is one reason the area is popular for second dwellings and investors.
The factory build is about 8 weeks, then transport and install is about 2 days on site. CDC approval usually runs about 10 to 20 business days and can happen alongside the build.
If you own in Campbelltown, Camden or Wollondilly and you want to know what fits your block, the easiest next step is a chat. Visit 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 owners in Campbelltown and nearby Edmondson Park have already gone this way.
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