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More than 10,000 Christchurch homes closer to repair or rebuild

EQC’s geotechnical investigations into green zone Technical Category 3 (TC3) land have been completed – meaning approximately 10,500 Christchurch homes with foundation damage are a major step closer to being able to be repaired or replaced.

The geotechnical programme began in March 2012 in the city’s eastern suburbs. It was expected to be completed by March next year – but has been completed early.

The geotechnical investigations were required in order to get adequate information for foundation design. They aimed to identify or confirm soil characteristics for homes with foundation damage that are under the $100,000 (+ GST) EQC cap.

  • The drilling was done in 50-metre grids and involved drilling bore holes to take soil samples, as well as cone penetrometer testing (CPT).
  • Investigations were undertaken on 3,500 private properties, as well as roadside berms and reserves.
  • Testing was not needed on every TC3 property – just those with foundation damage.

Drilling results have been progressively loaded onto the Canterbury Geotechnical Database, which engineers are using to help them design foundations in accordance with the Ministry of Building, Innovation and Enterprise’s requirements. The database can also be used by private insurers and others undertaking foundation design and repairs.

Access examples of drilling data


  • The worst damaged homes are expected to be repaired by the end of 2013.
  • All other homes will be repaired by the end of 2015.

Additional drilling

Additional drilling for land damage assessment is currently underway and will be completed in March 2013.



  • Use the online form to contact EQC, or
  • Phone 0800 DAMAGE (0800 326 243).


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