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Code for building in transport noise corridors

A residential building approved after 1 September 2010 that is in a designated transport noise corridor must comply with the QDC MP 4.4 – Buildings in a transport noise corridor (PDF, 661KB).

Under this code, residential buildings must achieve certain levels of noise reduction for occupants by incorporating appropriate building materials into the building's external envelope (e.g. windows, walls, roof, floors and entry doors).

MP 4.4:

  • provides a consistent building standard across Queensland
  • reduces the time and cost of building approval
  • minimises the effects of transport noise from major transport corridors on people's health and amenity.

Where the code applies

MP 4.4 applies to residential building development applications on properties in transport noise corridors.

It applies to new and pre-fabricated buildings, including houses, townhouses, units, hotels and motels (Class 1–4 buildings).

All building work must comply with MP 4.4. Building certifiers are responsible for monitoring and certifying this compliance.

Properties on multiple noise categories

A single property may be partially within a transport noise category or lie across multiple noise categories.

In this case, the requirements depend on where the building sits on the property. If the building sits wholly within a single noise category, that category's requirements apply even if other parts of the property are in a higher or lower noise category.

A building that sits across multiple noise category areas must meet the requirements of the category that applies to each part of the building.

There is a difference in decibel (dBA) noise levels in the comparative noise category between road corridors and railway corridors. However, only the relevant noise category applies to the building for design and construction compliance (not the category's noise level).

Property owners and building designers may either:

  • adopt the code's acceptable solution for the relevant noise category from the mapping tool search result (the deemed-to-satisfy assessment method to meet the performance requirement)
  • have an on-site noise assessment completed to find another solution to meet the requirements.

An on-site noise assessment can identify:

  • where a lower noise category might apply to the property
  • features that may affect noise levels, such as other buildings, noise barriers or topography.

Renovating existing dwellings and relocatable homes

Existing residential buildings

If a major renovation (alteration, addition, relocation) is proposed for an existing residential building in a designated transport noise corridor, the building:

  • doesn't need to comply with MP 4.4 if it was approved before 1 September 2010 (though the building owner may voluntarily include noise mitigation measures)
  • must comply with MP 4.4 in the area covered by the renovation if it was approved after 1 September 2010.

Relocatable homes

A relocatable home is usually a traditional Queenslander-style home that has been already built and moved from one property to another.

QDC 4.4 doesn't apply to an existing relocatable home (removal building) if its new location is in a designated transport noise corridor (as relocatable homes can be difficult and costly to retrofit with acoustic treatments).

Other dwellings

QDC 4.4 applies to new residential dwellings, including pre-fabricated and modular homes yet to be built, as noise mitigation measures can be incorporated with their overall design and construction.


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