State Environmental Planning Policy No 4

Development Without Consent and Miscellaneous Exempt and Complying Development 16 - When rainwater tanks are exempt development

(1) For a rainwater tank to be exempt development, it must comply with the following requirements:

  • (a) the capacity of the tank, or the combined capacity of tanks, on a lot must not exceed 10,000 litres,

  • (b) the tank must be designed to capture and store roof water from gutters or downpipes on a building,

  • (c) the tank must not collect water from a source other than gutters or downpipes on a building or a water supply service pipe,

  • (d) the tank must be fitted with a first-flush device, being a device that causes the initial run-off of any rain to bypass the tank to reduce pollutants entering the tank,

  • (e) the tank must be structurally sound,

  • (f) the tank must be prefabricated, or be constructed from prefabricated elements that were designed and manufactured for the purpose of the construction of a rainwater tank,

  • (g) the tank must be assembled and installed in accordance with the instructions of the manufacturer or designer of the tank,

  • (h) the tank, and any stand for the tank, must be installed and maintained in accordance with any requirements of the public authority that has responsibility for the supply of water to the premises on which the tank is installed,

  • (i) the installation of the tank must not involve the excavation of more than 1 metre from the existing ground level, or the filling of more than 1 metre above the existing ground level,

  • (j) the tank must not be installed over or immediately adjacent to a water main or a sewer main, unless it is installed in accordance with any requirements of the public authority that has responsibility for the main,

  • (k) the tank must not be installed over any structure or fittings used by a public authority to maintain a water or sewer main,

  • (l) no part of the tank or any stand for the tank may rest on a footing of any building or other structure, including a retaining wall,

  • (m) the tank must be located behind the front alignment to the street of the building to which the tank is connected (or, in the case of a building on a corner block, the tank must be located behind both the street front and street side alignments of the building),

  • (n) the tank must not exceed 2.4 metres in height above ground level, including any stand for the tank,

  • (o) the tank must be located at least 450 millimetres from any property boundary,

  • (p) a sign must be affixed to the tank clearly stating that the water in the tank is rainwater, Note. If water in rainwater tanks is intended for human consumption, the tank should maintained to ensure that the water is fit for human consumption-see the Rainwater Tanks brochure produced by NSW Health and the publication titled Guidance on the use of rainwater tanks, Water Series No 3, 1998, published by the National Environmental Health Forum.

  • (q) any overflow from the tank must be directed into an existing stormwater system,

  • (r) the tank must be enclosed, and any inlet to the tank must be screened or filtered, to prevent the entry of foreign matter or creatures,

  • (s) the tank must be maintained at all times so as not to cause a nuisance with respect to mosquito breeding or overland flow of water,

  • (t) any plumbing work undertaken on or for the tank that affects a water supply service pipe or a water main must be undertaken: (i) with the consent of the public authority that has responsibility for the water supply service pipe or water main, and (ii) in accordance with any requirements by the public authority for the plumbing work, and (iii) by a licensed plumber in accordance with the New South Wales Code of Practice-Plumbing and Drainage produced by the Committee on Uniformity of Plumbing and Drainage Regulations in New South Wales,

  • (u) any motorised or electric pump used to draw water from the tank or to transfer water between tanks: (i) must not create an offensive noise, and (ii) in the case of a permanent electric pump, must be installed by a licensed electrician. (2) Despite subclause (1) (a), a rainwater tank with a capacity exceeding 10,000 litres may be exempt development if another environmental planning instrument applying to the land concerned provides for such a rainwater tank to be exempt development. (3) This clause does not apply to land that is a lot within the meaning of the Strata Schemes (Freehold Development) Act 1973 or the Strata Schemes (Leasehold Development) Act 1986.

Source: NSW Government Legislation Website

http://www.legislation.nsw.gov.au