Do I Need a Building Permit?

Under the Building Act 2011, a Building Permit is required before commencement of most building work that involves the development of new structures, alterations or extensions and changes in ground levels.

This page shows a summary on what structures are exempt from obtaining a Building Permit as prescribed in the Building Regulations 2012

Some building works may require Planning Approval. Please contact Planning Services on 9290 6740 to discuss your proposed works.

Building work where a building permit is not required

Sheds and Patios (Class 10a building) 

Any free standing (not attached to a dwelling) shed or patio which is:

  • Less than 10 m²; and
  • Less than 2.4m in total height from the ground level.

Where there is more than one (1) free standing Class 10a building on the property, the area of 10m2 is calculated as the gross area of all Class 10a buildings and not for each individual building.

Renovations or Alterations 

Improvements, repair or maintenance of a building or incidental structure if the building work:

  • Will not adversely affect the structural soundness of the building or incidental structure and does not include:
    • An increase or decrease in the floor area or height of the building or incidental structure; or
    • Underpinning or replacement of footings; or
    • The removal or alteration of any element of the building or incidental structure that is contributing to the support of any other element of the building or incidental structure; and
  • Is done using materials commonly used for the same purpose as the material being replaced; and
  • Will not change the use or classification of the building or incidental structure; and
  • Will not adversely affect the safety and health of the occupants or other users of the building or incidental structure or of the public; and
  • Will not affect the way in which the building or incidental structure complies with each building standard that applies to the building or incidental structure; and
  • Is not work of a kind to which section 76, 77, 78 or 79 relates; and 
  • Is not subject to an order, agreement or permit under the Heritage Act.

Masts, Antenna or Similar Structures 

Construction, erection, assembly or placement of a mast, antenna or similar structure that:

  • If attached to a building:
    • Is no more than 2m in height above the highest point of attachment to the building; and
    • Will not affect the way in which the building complies with each building standard that applies to the building;
  •  If not attached to a building, is no more than 3m in height.

Retaining Walls

Construction, erection, assembly or placement of a retaining wall that:

  • Retains ground no more than 0.5 m in height; and
  • Is not associated with other building work or with the protection of land adjoining the land on which the retaining wall is located.

Pergolas

The placement of a pergola providing that:

  • The total height is less than 2.4 metres;
  • The total area is less than 20m².

Where there is more than one (1) pergola on the property the area of 20m² is calculated as the gross area of all pergolas and not for each pergola.

Note: a pergola is a structure which has a pervious roof cover.

Rainwater Tanks 

Rainwater tanks with a capacity of 5,000lts or less. 5,000lts is 1m deep x 2.0m high x 2.5m wide, (ie under eaves water tank).

Installation of Photovoltaic Panels and Solar Hot Water Systems 

Attachment of photovoltaic panels or solar hot water systems to a roof of a Class 1 building (house, dwelling) or Class 10 (shed, patio).

Roof Mounted Evaporative Coolers 

The installation of a roof mounted evaporative cooling unit on a building or incidental structure if:

  • The building or incidental structure is not located in a bushfire prone area; or
  • The building is a Class 4 to Class 9 building; or
  • The building or incidental structure is located in a bush fire prone area and the BAL for the building site is BAL-Low; or
  • The building or incidental structure —
    • Is located in a bush fire prone area; and
    • The BAL for the building site is BAL-12.5, BAL-19 or BAL-29; and
    • The installation of the evaporative cooling unit complies with the requirements for roof penetration in respect of the building or incidental structure set out in AS 3959.

Fences

Construction, erection, assembly or placement of a fence, screen or similar structure, other than a fence forming part of a barrier to a private swimming pool, if:

  • The fence, screen or similar structure is constructed in accordance with a local law made under the Local Government Act 1995 section 9.60                that applies to the construction of the fence, screen or similar structure in the district in which the fence, screen or similar structure is, or is to be, located; or
  • The fence, screen or similar structure is, or is to be, located in a district in which there is no local law of a type referred to in paragraph (a) and              the fence, screen or similar structure:
    • If constructed of masonry, is no more than 0.75m in height; and
    • If constructed of a material other than masonry, is no more than 1.8m in height.

Buildings used by Builders 

Construction, erection, assembly or placement of a temporary office, shed or sanitary facility to be used by a builder undertaking work on the same site.

Detailed information on requirements for each of the following types of building works is available on this website. For other types of building works, please contact Building Services on 9290 6660 or email shire@mundaring.wa.gov.au 

See also: