Building consent requirements for swimming pool fencing 

This Codewords 131 article goes into detail about Building Code Clause F9 – Restricting Access to Residential Pools and a builders’ obligations under the clause.

Residential pool safety in New Zealand is regulated through the Building Act 2004, as amended by the Building (Pools) Amendment Act 2016, which introduced Building Code Clause F9 – Restricting access to residential pools. These provisions are designed to prevent unsupervised access by children under 5, requiring most pools to be enclosed by a compliant barrier

A key threshold is that any residential pool capable of holding 400mm or more of water must have a physical barrier, regardless of whether the pool is permanent, temporary, or inflatable. 

When a building consent is required 

Ministry of Business, Innovation and Employment (MBIE) guidance is clear that pool barriers will generally require a building consent, reflecting their importance as a life-safety system. This applies even where the installation of the pool itself may be exempt under Schedule 1. 

Generally, a building consent is required for: 

• New pool barriers enclosing a qualifying pool, for example a fence, wall or other type of barrier. 

• Alterations that affect barrier performance, including height, openings or gate systems. 

• Building elements used as barriers, where doors, windows or walls of a dwelling form part of the enclosure. 

• Upgrades or retrofits that go beyond like-for-like replacement. 

Whether a building consent is required depends on Schedule 1 exemptions. Work affecting barrier performance or compliance is unlikely to be exempt. 

Limited exemptions 

While Schedule 1 of the Building Act provides for some exempt building work, pool barriers are generally not exempt. Even where a pool is exempt from requiring a building consent, a consent is typically still required for the barrier. This includes the installation of new barriers and the full replacement of existing ones, reflecting their critical life-safety function. 

– See Building Performance guidance for further detail on building work involving residential pools.  

Crucially, all work – whether consented or exempt – must still comply with the Building Code. In practice, if work affects the performance of the barrier, a building consent is likely required. 

Clause F9 performance requirements 

Clause F9 requires barriers to restrict access by unsupervised young children at all times when the pool contains water. 

Using Acceptable Solution F9/AS1, typical design requirements include but are not limited to: 

• A minimum barrier height of 1.2m. 

• Openings that prevent passage of a 100mm sphere. 

• A maximum gap of 100mm at ground level. 

• Gates that are self-closing, self-latching and open away from the pool. 

A non-climbable zone (typically 1200mm) must be maintained adjacent to the barrier, depending on the design. 

Where a building forms part of the barrier, doors and windows must also comply with F9, often requiring careful design or an alternative solution. 

Pool fences on boundaries need special consideration, including but not limited to additional height requirements and limits on climbability. 

Inspection and ongoing compliance 

All residential pool barriers must be inspected at least every three years by the territorial authority or an independently qualified pool inspector. 

Owners are responsible for maintaining ongoing compliance. Councils have enforcement powers, including issuing notices to fix and infringement notices where barriers do not meet requirements. 

Remember 

For LBPs, the key message is that pool fencing is rarely exempt from building consent requirements. Given the safety implications, barriers must be carefully designed, consented where required and constructed in compliance with Clause F9. Early engagement with the local council and robust documentation will help ensure smooth consenting and safe outcomes. 

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This article is an excerpt from Codewords Issue 131 and has been published verbatim. As such, neither PlaceMakers nor Under Construction magazine’s publishers take responsibility for the accuracy of the article or its corresponding questions.     

Reading Codewords articles that are relevant to your licence class is a mandatory requirement for Licensed Building Practitioners. These questions can be answered through the LBP portal, online on the Under Construction website or recorded on the magazine, then provided at the time of renewal.