Building height controls: Darwin city
This page has information for people who want to build large, multi-storey developments in the Darwin central business district (CBD).
Unless you plan to build within the locality covered by the Darwin City Waterfront Area Plan, on the Esplanade, or anywhere on the south-western side of Mitchell Street, there are no specific rules about how tall a building can be in the CBD under the Northern Territory (NT) Planning Scheme.
Read more about the NT Planning Scheme.
However, there are Australian laws around height limitations aimed at keeping civil and defence aircraft safe when flying in and out of Darwin Airport.
Defence restrictions for building
Building heights that may be hazardous for military aircraft within a 15km radius of an airfield, including the RAAF Base Darwin, are controlled by laws.
The Defence (Areas Control) Regulations 1989 state that the maximum height of a structure is 90m above ground level south-west of McMinn Street, or 45m above ground level to the north east of McMinn Street. Read the law.
To build or use a structure that is higher than the maximum height specified, you will need approval from the Department of Defence.
Contact the Department of Defence by emailing email@example.com or by calling (02) 6266 8191.
Protected airspace around airports
Federal laws control any development in an airport's protected airspace. The protected airspace is made up of two sets of invisible surfaces above ground level around the airport.
These two surfaces mean there are two separate height limits over the Darwin city centre.
Obstacle limitation surfaces
Obstacle limitation surfaces, also known as OLS, control the height you are legally allowed to build at to protect aircraft flying in and out of Darwin when the pilot is flying by sight.
Procedures for air navigation services - aircraft operations surfaces
Procedures for air navigation surfaces - aircraft operations surfaces, also known as PANS-OPS, stop you from constructing any building which could cause a collision with an aircraft when it is flying in poor visibility.
Get approval for controlled activities
Any building or works within these two surfaces are a controlled activity and you must get approval for them from the Darwin International Airport.
Use the following maps to determine the surface heights for protected airspace around airports:
Unless you have met the requirements for both surfaces you will not be approved to build in the city centre.
For more information contact Darwin International Airport by emailing firstname.lastname@example.org or calling (08) 8920 1811.
To read more about protected airspaces and how to get approval to carry out a controlled activity, go to the Australian Government's Department of Infrastructure and Regional Development website.
While the height of a proposed building may be below the limits described above, cranes used during the construction of a building may infringe these limitations.
Cranes that infringe on height limitations will need approval from the relevant authorities.
Building construction methods involving cranes should be considered as early as possible in the building design phase.
The use of hammerhead or flat-top cranes is encouraged in preference to luffing cranes.
Last updated: 21 June 2018