Northern Territory · Planning guide
Granny flat rules in the NT
In the Northern Territory a granny flat is a dwelling-independent, defined in the NT Planning Scheme 2020 as an ancillary dwelling built on the same site as a dwelling-single. Clause 5.4.13 allows no more than one per site, caps the floor area at 75m2 in most zones and 100m2 in Zones H, A, RL and R, and requires both dwellings to share a single water connection or bore, a single power connection and normally a single vehicle access. In Zone LR a dwelling-independent is a Permitted use, so no development permit is needed if it meets every relevant Part 5 requirement and no overlay requires consent. If it departs from a requirement it becomes Merit Assessable and needs consent.
Sources read on 9 September 2026. Provisions are quoted word for word from the instrument.
What a dwelling-independent is
The NT Planning Scheme 2020 applies across the whole Territory except where a specific planning scheme has been made under the Planning Act 1999. Its Schedule 2 defines the residential uses, and the term for a granny flat is dwelling-independent: an ancillary dwelling constructed on the same site as a dwelling-single. A dwelling is a building or part of a building designed, constructed or adapted as a self-contained residence, and a dwelling-single is a building containing one dwelling only.
The definition ties the granny flat to a dwelling-single. It is not the same as a dwelling-group, which is two or more dwellings side by side on a site, or a dwelling-multiple, which is one dwelling over another. Those are assessed as density under clause 5.4.1 rather than as an ancillary dwelling.
dwelling-independent means an ancillary dwelling that is constructed on the same site as a dwelling-single; dwelling-single means a building containing one dwelling only; dwelling means a building, or part of a building, designed, constructed or adapted as a self-contained residence;
Read the source · retrieved 9 September 2026
This Planning Scheme applies to the whole of the Northern Territory with the exception of an area subject of a specific planning scheme made under section 8 of the Planning Act 1999.
Read the source · retrieved 9 September 2026
The clause 5.4.13 requirements
Clause 5.4.13 of Part 5 sets the development requirements. There will be no more than one dwelling-independent on a site. The maximum floor area is 100m2 in Zones H, A, RL and R and 75m2 in every other zone. There is only one shared vehicle access to the road unless the relevant authority has approved a second. Both dwellings must be served by a single bore or a single reticulated water connection, and by a single reticulated power connection.
The administration clauses set how strict each requirement is. The consent authority must not consent to a dwelling-independent that breaches the one per site rule, the single water service rule or the single power service rule. It may consent to a larger floor area only if satisfied the proposal is consistent with the purpose of the clause and the zone, and appropriate to the site.
The purpose clause explains the design intent: increased housing choice while the unit remains ancillary to the dwelling-single, without significant impact on neighbours' amenity, the natural environment or the local road network.
3. There will be no more than one dwelling-independent on a site. 4. The maximum floor area of the dwelling-independent in: (a) Zones H, A, RL and R shall not exceed 100m2; and (b) in all other zones shall not exceed 75m2. 5. There is only one shared vehicle access point to the road, unless the relevant authority has approved a second access. 6. Both dwellings will be serviced by either a single bore or a single connection to a reticulated water supply. 7. Both dwellings will be serviced by a single connection to a reticulated power supply.
Read the source · retrieved 9 September 2026
1. The consent authority must not consent to a dwelling-independent that is not in accordance with sub-clauses 3, 6 and 7. 2. The consent authority may consent to a dwelling-independent that is not in accordance with sub-clause 4 only if it is satisfied it is consistent with the purpose of this clause and the zone purpose and outcomes, and it is appropriate to the site having regard to such matters as its location, scale and impact on surrounding amenity.
Read the source · retrieved 9 September 2026
Ensure a dwelling-independent provides for increased housing choice while remaining ancillary to the dwelling-single on a site, and is developed in a manner that: (a) avoids significant impact on the amenity of adjoining and nearby property; (b) does not detrimentally impact on the natural environment; and (c) does not adversely impact the local road network.
Read the source · retrieved 9 September 2026
Density, setbacks and open space also apply
A dwelling-independent is counted within the zone's dwelling density. Table A to clause 5.4.1 allows one dwelling-single per lot and may include a dwelling-independent in Zones LR, RR, RL, R and CV, and the same base allowance in LMR, CL, T, H and A. The granny flat therefore does not use up a second dwelling entitlement, but it is only allowed alongside a dwelling-single.
The unit must meet the residential setbacks in clause 5.4.3, which in urban zones other than the rural zones require 1.5m to side and rear boundaries for one and two storey residential buildings, with a 1m side or rear setback allowed for a wall with limited openings, no more than 3.5m high and no more than 9m long. It also needs its own private open space under clause 5.4.6, in addition to the open space of the main house.
LR, RR, RL, R and CV 1 dwelling-single per lot and may include a dwelling-independent
Read the source · retrieved 9 September 2026
1.5m for residential buildings and ancillary structures or 1m, provided that the subject wall: • only includes openings that are either glazed in an opaque material and cannot be opened, or have a sill height of 1.6m or greater; • does not extend beyond a maximum height of 3.5m; and • does not extend beyond a maximum length of 9m
Read the source · retrieved 9 September 2026
Dwelling-group Dwelling-single on a lot less than 450m2 Dwelling-independent in addition to the private open space requirement for the dwelling - single A. 45m2, open vertically to the sky, with no dimension less than 1.5m; and B. 24m2, all or partly covered, with no dimension less than 4m.
Read the source · retrieved 9 September 2026
Do you need a development permit?
The Zone LR assessment table lists Dwelling-Independent as Permitted, with the setback, private open space and dwelling-independent clauses as its development requirements. Part 1 clause 1.8 explains what Permitted means: the use is allowed without consent when it is shown as Permitted in the assessment table, no overlay in Part 3 requires consent, and it complies with all relevant Part 5 requirements.
A Permitted use that does not comply with a Part 5 requirement, or that sits in an overlay requiring consent, becomes Merit Assessable and needs a development permit from the consent authority. So a granny flat over 75m2 in Zone LR, or one with its own power meter, needs consent, and for the services rule the consent authority must refuse.
Whatever the planning answer, building work needs a building permit under the Building Act 1993, which is a separate approval issued by a building certifier.
Permitted – use and development that is compatible with the purpose of the zone provided it is established and operated to comply with all relevant development requirements. Use and development of land is Permitted without consent when the following apply: i. it is shown as Permitted on the relevant assessment table in Part 4; and ii. it does not require consent by virtue of an overlay in Part 3; and iii. it complies with all relevant development requirements set out in Part 5; or iv. a provision of the Planning Scheme expressly sets out that it is Permitted.
Read the source · retrieved 9 September 2026
Use and development of land requires consent and is Merit Assessable when any of the following apply: i. it is shown as Merit Assessable on the relevant assessment table in Part 4; ii. it is shown as Permitted on the relevant assessment table in Part 4 but: (1) requires consent by virtue of an Overlay as set out in Part 3; or (2) does not comply with the relevant development requirements set out in Part 5;
Read the source · retrieved 9 September 2026
Dwellings-single and associated dwellings-independent predominantly two storeys or less, on individual lots on a range of lot sizes that respond to changing community needs. Dwelling-Independent Permitted 5.4.3 Building Setbacks of Residential Buildings and Ancillary Structures 5.4.6 Private Open Space 5.4.13 Dwelling-Independent
Read the source · retrieved 9 September 2026
A person must not carry out building work unless a building permit in respect of the work has been granted and is in force under this Act and the work is carried out in accordance with the permit.
Read the source · retrieved 9 September 2026
What changes council by council in Northern Territory
The state instruments set the frame. These points are set by each council's own instrument or mapping, so the answer for an address depends on which council it sits in.
- NT councils do not make planning schemes. The zone at a site is set by the NT Planning Scheme 2020 zone maps, and each zone's assessment table sets whether a dwelling-independent is Permitted, Merit Assessable, Impact Assessable or Prohibited.
- Overlays in Part 3, such as land subject to flooding, storm surge, land adjacent to a designated road and airport-related overlays, can require consent for an otherwise Permitted dwelling-independent and prevail over other Parts.
- The floor area cap differs by zone: 100m2 in Zones H, A, RL and R and 75m2 in all other zones.
- A building setback plan in Schedule 9 can replace the Table A setbacks for particular land.
- Area plans in the Strategic Framework prevail over zone purposes and outcomes but not over the assessment category.
Council pages in Northern Territory
For your address
How the $150 report settles this for one site
A Casa preliminary planning report reads the NT Planning Scheme zone and the Part 3 overlays mapped at your parcel, confirms whether a dwelling-independent is Permitted in that zone's assessment table, and sets out the clause 5.4.13 floor area and service requirements, the clause 5.4.3 setbacks and the clause 5.4.6 open space that apply at that address. It tells you whether the proposal can proceed without consent or needs a development permit, and it does not replace the building permit.
Common questions
How big can a granny flat be in the NT?
Clause 5.4.13 caps the floor area at 75m2 in most zones and 100m2 in Zones H, A, RL and R. The consent authority can approve a larger unit only if satisfied it is consistent with the clause and zone purpose and appropriate to the site.
Do I need a development permit for a granny flat in Darwin?
Not if the site is in a zone where dwelling-independent is Permitted, such as Zone LR, no overlay requires consent, and the unit meets every relevant Part 5 requirement. Any departure makes it Merit Assessable and a development permit is needed. A building permit is required in all cases.
Can the granny flat have its own power and water?
No. Clause 5.4.13 requires both dwellings to share a single bore or reticulated water connection and a single reticulated power connection, and the consent authority must not consent to a proposal that breaches those requirements.
Can I have two granny flats on one block?
No. Clause 5.4.13 says there will be no more than one dwelling-independent on a site, and the consent authority must not consent to more.
Can I build a granny flat next to a duplex or unit?
The definition ties a dwelling-independent to a dwelling-single on the same site, and the density table allows it with one dwelling-single per lot. A dwelling-group or dwelling-multiple site is assessed under the density rules instead.
Does a granny flat need its own yard?
Yes. The private open space table in clause 5.4.6.1 requires a dwelling-independent to have, in addition to the main house's open space, 45m2 open to the sky with no dimension under 1.5m and 24m2 of covered or open dimensioned space with no dimension under 4m.
Sources read for this guide
- NT Planning Scheme 2020, Parts 1, 4 and 5 and Schedule 2, Northern Territory Governmentread 9 September 2026
- Building Act 1993 (NT), as in force at 10 February 2026read 9 September 2026
Not covered here
- Parts 4, 5 and Schedule 2 quotes were taken from Casa's cached copies of the nt.gov.au PDFs (fetched 2026-09-08, file dates June 2026 and March 2026, no version number stated in the text) and re-read 2026-09-09. Part 1 and the Building Act were fetched live on 2026-09-09.
- The Zone LR assessment table is a multi-column layout, so the Dwelling-Independent row is quoted as its cells read in order and the overlay column is not reproduced.
- Zones other than LR were not checked for the assessment category of a dwelling-independent, so the guide says only that each zone's table sets it.
- The Zone LR Table A primary and secondary street setbacks are stated in prose from the table and quoted in the height and setback guide rather than here.
More NT guides
- Dual occupancy rules in the NT
- Subdivision rules in the NT
- Fast-track approvals in the NT
- Height and setback rules in the NT
- Do I need a DA in the NT?
Granny flat rules in other states
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