NSW landlord obligations, tenancy rules, and legal requirements for renting a granny flat or secondary dwelling.
Last updated: 14 July 2026 · 1,000 words
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As of 14 July 2026, 57,692 — Development applications indexed from the NSW Planning Portal public register (NSW Planning Portal)
As of 14 July 2026, 128 — Every NSW council's development applications, updated daily (NSW Planning Portal)
As of 14 July 2026, 18 — Construction material prices benchmarked against ABS producer price movements (ABS PPI 6427.0)
In NSW, you can legally rent a granny flat as a standard residential tenancy — but only if the dwelling was built with proper approval and holds a valid Occupation Certificate. Getting that foundation right determines everything that follows, from your insurance cover to your ability to enforce a lease.
Approval status comes first
Before you advertise a vacancy, confirm your secondary dwelling was approved either through a Development Application (DA) with council or a Complying Development Certificate (CDC) under the State Environmental Planning Policy (Housing). Both pathways require an Occupation Certificate (OC) to be issued before the dwelling is occupied.
Renting an unapproved secondary dwelling exposes you to council fines, orders to vacate the occupant, and — critically — potential refusal of an insurance claim if a tenant is injured or the structure is damaged. Your home insurer needs to know the flat is tenanted; failure to disclose can void your policy.
If you are unsure of your approval status, your local council's planning portal or the NSW Planning Portal can show the DA and OC history for your property. DesignBuildSource also surfaces DA data at a suburb level, which can help you understand how similar approvals were processed in your area.
NSW Residential Tenancies Act obligations
Renting a granny flat is governed by the Residential Tenancies Act 2010 (NSW) in exactly the same way as renting a house or apartment. There is no reduced standard for secondary dwellings. Your minimum obligations as a landlord include:
- Providing a written tenancy agreement (the standard NSW Fair Trading form is widely used and recommended)
- Lodging the tenant's bond with NSW Fair Trading within 10 business days of receipt — the maximum bond is four weeks' rent
- Giving the tenant a copy of the Renting Guide published by NSW Fair Trading at the start of the tenancy
- Completing a condition report with the tenant at the start of the tenancy and retaining a signed copy
- Meeting the fit for habitation standard: functioning smoke alarms (photoelectric type, hard-wired or with 10-year lithium battery), secure door and window locks, no uncontrolled water ingress, adequate natural light and ventilation
The fit-for-habitation standard also means the dwelling must have a working water supply and hot water system, weatherproof walls and roof, and reasonable structural integrity. These are not optional upgrades — they are legal minimums.
Ongoing maintenance and entry rights
You must keep the granny flat in a reasonable state of repair throughout the tenancy, regardless of the tenant's rent level or the age of the building. Essential services — water, hot water, electricity, gas where connected — must remain operational. It is unlawful to interrupt utility supply as a means of pressuring a tenant to leave; doing so can result in significant penalties under the Act.
You must give a minimum of 24 hours' written notice before entering the premises for non-urgent inspections or repairs. Emergency access (for example, a burst pipe) can be immediate. Routine inspections are limited to four per year.
Utilities: shared versus separate metering
Many granny flats share a single electricity or water meter with the main dwelling. This is common and lawful, provided you document the billing arrangement clearly in the tenancy agreement. You may charge the tenant a reasonable proportion of costs — typically calculated by sub-metering or an agreed formula — but you cannot profit from on-selling electricity above the rate you pay.
Installing a separate NMI (electricity) connection and individual water meter creates a cleaner billing relationship and removes ongoing disputes. Indicative costs for a separate electrical connection run from around $2,000 to $5,000 depending on the distance to the switchboard and whether trenching is required; a water sub-meter is generally less. These are one-off capital costs that may be deductible or depreciable — confirm the treatment with your accountant.
Strata and community title properties
If your property sits within a strata scheme, renting a secondary dwelling may require approval from the owners corporation, and some older by-laws restrict or prohibit secondary dwellings altogether. Check the current by-laws before proceeding; attempting to rent without the required approval can result in the owners corporation issuing a by-law breach notice.
Community title and company title schemes have their own rules. In all cases, obtain the relevant scheme documents and seek legal advice if the by-laws are ambiguous.
Tax and financial considerations
| Item | General treatment (confirm with your accountant) |
|---|---|
| Rental income | Assessable income in the year received |
| Mortgage interest (granny flat proportion) | Generally deductible against rental income |
| Repairs and maintenance | Generally deductible; capital improvements are depreciated |
| Depreciation (plant and equipment) | Claimable via a quantity surveyor's depreciation schedule |
| NSW land tax | May apply to the property once it is used for investment — threshold and principal place of residence exemption rules apply |
| Capital gains tax (CGT) | Renting part of your principal residence can reduce or remove the main residence CGT exemption for that portion — seek specific advice |
Land tax and CGT exposure are the two areas most commonly overlooked by owner-occupiers who add a tenanted granny flat. The NSW land tax threshold changes annually; check the current figure with Revenue NSW and model the impact with your accountant before your first lease is signed.
Practical steps before your first tenant moves in
- Confirm the OC is issued and on file
- Notify your home insurer and, if needed, take out a separate landlord insurance policy
- Test all smoke alarms, locks, and appliances
- Commission a building inspection if the flat is more than a few years old — identifying maintenance items now avoids disputes later
- Engage a licensed property manager or use the NSW Fair Trading standard lease if self-managing
- Obtain a quantity surveyor's depreciation schedule to maximise legitimate tax deductions
To benchmark the build quality and remaining capital value of your secondary dwelling — or to get indicative cost estimates if you are still in the planning stage — use the DesignBuildSource cost calculator, or search the professional directory to connect with a licensed builder or certifier in your council area.
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Design Build Source — Australia's construction intelligence platform. Data sourced from ABS, council DA registers, and verified professional quotes.
This guide is for general information only and does not constitute professional advice. Cost figures are indicative estimates based on the DBS Real Cost Database and ABS Producer Price Indexes. Always obtain independent advice from a licensed builder, quantity surveyor, or financial adviser before making construction or financial decisions. Build costs vary significantly by site, design, finish level, and location.
