If you own a home in the Campbelltown area and you are weighing up a second dwelling, you are in one of the better spots in Sydney for it. Granny flats in Campbelltown make a lot of sense because the blocks out here tend to be bigger, and bigger land usually means an easier approval and more room to place the build where you actually want it.
This guide walks through what a Campbelltown owner should know in 2026: the local council picture, typical block sizes, the costs to budget for, and how we get a finished home to you from our factory just up the road.
Campbelltown City Council covers a big chunk of the Macarthur region, from the established suburbs like Leumeah, Ingleburn and Minto through to the growth areas further out. A lot of the older residential streets here were carved up when land was cheap, so you will find generous blocks of 600 to 800 square metres and sometimes more.
That matters because the bigger your block, the more likely you sit comfortably inside the rules for a fast approval. Larger land also gives you choices: north-facing living, decent separation from the main house, and easy access down the side for delivery.
Most blocks of 450 square metres or more in a residential zone can have a granny flat 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 going through a full council DA.
Plenty of Campbelltown blocks clear that 450 square metre mark with room to spare, so the CDC route is common locally. If your site has something unusual going on, like an easement or a heritage flag, you may need a Development Application through council instead. We always recommend confirming the specifics with a certifier. You can read more about how granny flat approval works in NSW before you commit.
Pricing depends on your site and the finish you choose, so treat these as a guide rather than a quote. A complete, finished granny flat in Sydney usually lands somewhere 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 Campbelltown blocks are relatively flat with services close by, which helps keep things predictable. 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, which is a short run up the road from Campbelltown. Because we build the home in our factory over about 8 weeks and then transport it, your backyard is only really occupied for the couple of days it takes to install.
That is the big advantage of going factory-built and transportable. There are no months of trades coming and going, no long stretch of mud and noise, and far less disruption to the family in the main house. You can see how the whole thing runs on our our process page.
With the space most local owners have, the full-size 60 square metre two-bedroom homes are popular. Our two-bedroom Banksia 60 with its separate kitchen and deck works well for older parents or a rental, and the Snow Gum 60 with its island bench and separate laundry is a favourite for owners who want a bit more comfort. If you would rather a compact footprint, there are smaller options too. Browse the full range of designs to compare.
Macarthur has strong family-living demand. Many owners build to keep elderly parents close, give adult kids a stepping stone, or earn rental income. A second dwelling can suit all three over time, which is part of why the area has taken to them.
Under the NSW Housing SEPP the maximum internal floor area is 60 square metres. Covered patios, verandahs and carports sit outside that 60 square metres, so you can still add a deck or alfresco without eating into the floor area.
You generally need at least 450 square metres in a residential zone to use the CDC pathway. Many Campbelltown blocks comfortably exceed that, but it is worth confirming your exact size and zoning with a certifier.
The factory build takes about 8 weeks, then transport and install is about 2 days on site. Approval through CDC usually runs about 10 to 20 business days and can happen alongside the build.
If you are a Campbelltown owner ready to get moving, the easiest next step is a chat about your block. 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 been building modular and transportable homes in NSW for over 30 years, and we are happy to help you work out the right design and budget.
Accredited & Certified
NSW Builder LicenceNo. 282297C
HIA Member591826
