The short answer is yes. You can rent out a granny flat in NSW to anyone you want. Family, a young couple, a retiree, a student. There are no restrictions on who your tenant can be, as long as the granny flat was built and approved the right way.
That old idea about granny flats only being for Grandma? It has not been true for years. But plenty of people still believe it, which is why this question comes up so often from granny flat Sydney homeowners looking at their backyard and wondering whether the numbers stack up.
They do. And here is how it all works.
The Law Is on Your Side
NSW planning law is pretty supportive when it comes to granny flats. The State Environmental Planning Policy (Housing) 2021 is the piece of legislation that covers secondary dwellings, and it allows homeowners to build a self-contained granny flat on their property and rent it to whoever they like.
You do not need special permission to take on a tenant. You do not need to notify the council that someone is living there. The same tenancy laws that apply to a house or apartment in NSW apply to a granny flat. Nothing unusual about the process at all.
The one thing that matters is that the granny flat has proper approval. Without that, you cannot rent it, you cannot insure it, and you open yourself up to all sorts of problems with the council.
Does Your Block Qualify?
Before anything else, your property needs to tick a few boxes.
How Big Is It?
You need at least 450 square metres of land to build a granny flat through the quick approval pathway. If your block is a bit smaller, there is still a chance you could get it done through a full council application, but the outcome is less certain and the process takes longer.
Is It Zoned Residential?
The property has to sit in a residential zone, which covers most of suburban Sydney. R1, R2, R3, R4 and R5 are all fine. A few other zones might work too, but that depends on your local council. If you are unsure, most granny flat builders can check this for you in a couple of minutes.
Is There Already a House on the Block?
There has to be. A granny flat is a secondary dwelling, so by definition it needs a primary dwelling to go alongside. You cannot put one on empty land.
How Many Can You Build?
Just one. One granny flat per lot. And you cannot subdivide the land to separate the two dwellings. They stay on the same title.
The 60 Square Metre Limit
NSW caps the internal living area of a granny flat at 60 square metres. That might not sound like much, but a good floor plan makes 60 square metres surprisingly liveable. Two bedrooms, a bathroom, a kitchen and a living area all fit within that space if the layout is done well.
Here is something a lot of people do not realise. Covered outdoor areas like a verandah or an alfresco usually do not count toward that 60 square metre number. Neither do some types of storage. So the space your tenant actually uses day to day can feel a lot more generous than the number on paper. This is one of those areas where experienced granny flat builders really earn their money, because they know exactly how to squeeze the most out of every square metre without breaking any rules.
Two Ways to Get Approval
The Quick Way
A Complying Development Certificate, or CDC, lets you skip council altogether. A private certifier checks that your property and your plans meet the state planning rules, and if everything lines up, you can have approval in as little as 10 days. This is how most granny flat Sydney builds get done because it saves weeks of waiting and a lot of paperwork.
The Council Route
If your property does not meet the CDC criteria, maybe the lot is too small, or there is a heritage overlay, or the site is flood prone, then you need to lodge a Development Application with council. It takes months rather than days, costs more, and neighbours get notified. But it does open the door to a bit more flexibility in some cases.
Whichever route you take, do not skip this step. We have heard plenty of stories about people who built something in the backyard without any approval and then found out the hard way that they could not rent it, could not insure it, and in some cases were told to pull it down.
What Kind of Rent Can You Expect?
Sydney’s rental market has been kind to granny flat owners in recent years. Vacancy rates are low and demand for small, private, affordable housing is strong.
One Bedroom
Rents tend to land between $250 and $400 a week across Greater Sydney. Closer to the city or the coast and you are at the top of that range. Western Sydney and the Central Coast sit a bit lower, though even those areas have seen solid growth.
Two Bedroom
This is where the returns get interesting. A two bedroom granny flat in a well connected suburb can bring in $400 to $600 a week. Near a train station or a major shopping centre, the higher end of that range is realistic. In the Inner West or Eastern Suburbs, some granny flats are pulling in $550 or more.
What That Looks Like Over a Year
At $450 a week, you are looking at about $23,000 a year in gross rental income. If the granny flat cost $180,000 to build, that means it roughly pays for itself within 8 years. Everything after that is income with very little ongoing expense. And that is before you factor in the property value boost, which most estimates put at somewhere between 10 and 30 percent.
Tax Is Part of the Picture
Rental income from a granny flat is taxable. There is no way around that. But the deductions can take a decent chunk out of the tax bill.
You can claim depreciation on both the building itself and the fittings inside. Maintenance costs, insurance, council rates, property management fees, and loan interest are all deductible too. In the early years especially, the depreciation alone can make a noticeable difference.
One thing to be aware of is capital gains tax. If you rent out a portion of your property, you may lose part of your main residence CGT exemption when you eventually sell. It does not mean you should not rent the granny flat out. It just means you should sit down with an accountant before your first tenant moves in and make sure you understand how it affects your position.
Being a Landlord
Once someone is paying you rent, you are a landlord. No different to owning an investment property anywhere else in NSW.
You need a written tenancy agreement. Even if the tenant is family. Especially if the tenant is family, because informal arrangements have a habit of going sideways when something goes wrong.
Bond is capped at four weeks rent and has to be lodged with NSW Fair Trading. You are on the hook for keeping the property in good repair, covering things like plumbing, hot water, electrical, and anything structural. Smoke alarms need to be installed and working at all times, and whatever fire safety conditions were part of your building approval need to stay in place.
None of this is complicated. It is the same stuff any landlord in NSW has to do. Just make sure you treat it like a proper rental from day one and you will avoid problems down the track.
Getting the Build Right
If you have not built the granny flat yet, the decisions you make now will affect your rental returns for years to come.
Pick a Builder Who Knows Granny Flats
This is a niche. The approval rules, the design constraints, the 60 square metre limit, the setback requirements, the site costs. Granny flat builders who do this every day understand all of it and can steer you around problems before they happen. A general builder who has never done one before will get there eventually, but it will cost you more time and probably more money.
Make Sure the Quote Covers Everything
Turnkey is the word you are looking for. That means design, approvals, construction, connections, landscaping, and handover. Some quotes look cheap because they leave out site costs, council fees, or utility connections, and those extras can add tens of thousands to the final bill. Always ask for an itemised breakdown and compare quotes on a like for like basis.
Tell Your Builder It Is for Rental
This matters more than people think. A granny flat designed with tenants in mind will have a separate entrance, decent natural light, a bathroom that does not feel cramped, built in wardrobes, and an outdoor area with some privacy from the main house. These are the details that attract better tenants and higher rent. If you do not mention it upfront, the builder might design something that works fine for a family member but falls short as a rental.
Mistakes That Come Up Again and Again
No approval
We keep coming back to this because it is the biggest one. No CDC or DA means the dwelling is not legal. You cannot rent it. You cannot insure it. And if the council catches up with you, the consequences can be ugly.
No separate meters
If your granny flat does not have its own electricity and water meters, you end up paying your tenant’s bills or arguing about who used what. Get meters installed during the build. Doing it later is harder and more expensive.
Privacy as an afterthought
On a lot of granny flat Sydney blocks, the secondary dwelling ends up fairly close to the main house. If nobody thought about where the windows and doors go, both households end up feeling like they are living on top of each other. Good design handles this from the start with smart placement, fencing, and landscaping.
Wrong insurance
Your home insurance probably does not cover a rental granny flat. Contact your insurer and add landlord cover that includes the secondary dwelling and any tenant related liability. Find this out before someone moves in, not after something goes wrong.
The Bottom Line
For most homeowners in Sydney with a qualifying block, building a granny flat and renting it out is one of the smartest property moves available right now. The rental market is hungry for small, well built, self-contained homes. Tenants are there. The income is real. The property value goes up.
You just need to do the basics properly. Get the approvals. Work with granny flat builders who know what they are doing. Set up a formal tenancy. Sort your insurance. Talk to an accountant.
When those pieces are in place, you end up with an income producing asset in your backyard that earns money year after year with very little effort. And in a city as expensive as Sydney, that is a pretty valuable thing to have.