Natural Hazards

Liquefaction & Lateral Spread

Implications for building consents

New knowledge regarding seismic risk for the Waimakariri District means that, as from 19 May 2011, foundations within an area where liquefaction and/or lateral spread could occur are now subject to specific engineering design by a chartered professional engineer except those of AS/NZS1170 importance level 1 (e.g. structures with a total floor area <30 m2, farm buildings, isolated structures, towers in rural situations, fences, masts, walls, in-ground swimming pools).

Further information regarding Natural Hazards such as Earthquakes, Floods and Tsunamis can be found on the Environment Canterbury Regional Council website

Natural Hazards Map 

Building on Land Subject to Natural Hazards

For Section 71 to 73 of the Building Act natural hazard means

  • Erosion (including coastal erosion, bank erosion and sheet erosion)
  • Falling debris (including soil, rock, snow and ice)
  • Subsidence
  • Inundation (including flooding, overland flow, storm surge, tidal effects and ponding)
  • Slippage

Procedure for Granting a Building Consent subject to Section 72 of the Building Act 2004

The applicant will be made aware that the application is being considered under Section 72 and the Hazard will be registered against their title.  They may also be required to apply for a waiver to part of E1.3.2. 

The owner’s confirmation is required to recognise the potential implications this may have on their insurance and any future sales.  The owner has the opportunity then to withdraw their application.

There will be a Fee for Notification to LINZ regarding Natural Hazard.