NT & ACT Land & Water Rules, by Council
Darwin and Palmerston have their own storm surge overlay considerations on top of the state-wide NT framework (see the state-wide NT & ACT article), and the ACT's rural lease shed exemption is precisely defined at 216m² — larger than most people realise.
City of Darwin
Darwin sits within the NT's cyclonic wind region, and coastal parts of the LGA fall within the NT Government's mapped Land Subject to Storm Surge overlay — split into Primary Storm Surge Areas (a 1% annual chance of severe inundation during a cyclone) and Secondary Storm Surge Areas (lower risk, but still mapped). Building within these overlays needs a planning permit regardless of whether the structure would otherwise be exempt, with finished floor levels required to sit above established storm-tide heights. Building approval more generally is only required within a declared building control area — outside one, a Class 10 structure may not need building approval or occupancy certification at all, subject to the Director of Building Control's criteria.
Source: NT Government — Planning and Building Rules for Land Affected by Natural Hazards; Building Act 1993 (NT)
City of Palmerston
Palmerston, adjoining Darwin, shares the same storm surge overlay consideration for its coastal and low-lying areas, and the same declared-building-control-area system for building approval more broadly. Given Palmerston's own land-ratio dam and livestock approach covered on our livestock page, confirming both your property's storm surge overlay status and whether it sits within a declared building control area is worth doing before any dam or shed project.
Source: NT Government — Planning and Building Rules for Land Affected by Natural Hazards; Building Act 1993 (NT)
The ACT: no local councils, but a precise rural lease exemption
The ACT has no local government councils — it's governed directly by the ACT Government, which is why this page doesn't list individual ACT councils the way every other state does. What's worth knowing at the territory level: under the Planning (Exempt Development) Regulation 2023, an ordinary Class 10a shed on a block under 500m² is exempt up to just 10m². But on a genuine rural lease specifically, section 1.85 of the same Regulation allows a much larger exemption — up to 216m² of plan area — without a Development Application, subject to native vegetation, land management agreement, and other conditions. This is a large jump, and reflects the ACT's broader pattern (covered in our state article) where meaningful land and water rights only attach to rural leases specifically, not standard residential Crown leases.
Source: Planning (Exempt Development) Regulation 2023 (ACT), Schedule 1
Frequently Asked Questions
What is the storm surge overlay in Darwin and Palmerston?
A mapped NT Government planning overlay covering coastal and low-lying parts of Greater Darwin, Palmerston, and the Cox Peninsula, split into Primary and Secondary Storm Surge Areas based on cyclone-driven inundation risk. Building within these areas needs a planning permit regardless of whether the structure would otherwise be exempt.
How big a shed can I build on a rural lease in the ACT?
Up to 216 square metres of plan area without a Development Application, under section 1.85 of the Planning (Exempt Development) Regulation 2023 - much larger than the standard 10 square metre exemption for ordinary blocks under 500 square metres.
Why doesn't this page list individual ACT councils?
Because the ACT has none - it's governed directly by the ACT Government rather than separate local government areas, so territory-wide rules are the only level that applies.