Kwanto is recognized as one of New Zealand's leading authorities on leaky building costs, we specialise in providing accurate cost information. Our technical knowledge and skills can be utilised in mediations, adjudications and High Court proceedings.

We are able to provide justified rates and industry data to support our figures, as well as real time estimates during the process to reflect discussion and debate.

Kwanto is routinely instructed by building surveyors, private clients, plaintiffs, defendants and lawyers to provide quantum evidence including cost estimates and forensic assessment of the project costs for mediation, adjudication and High Court proceedings.

Kwanto sits on the panel of preferred suppliers for the Department of Building and Housing - Weathertight Service Group and has completed more 4,000 leaky building estimates.

Kwanto is able to assist throughout the dispute resolution process including:

  • Preparation of a quantum report including an assessment of the fair and reasonable claim cost
  • Estimating like-with-like repair options
  • Assessing betterment and excessive costs
  • Assessing construction processes, for example tendering process


NZIQSAuckland CouncilNZGBCProperty CouncilEco WarrantyMinistry of Business, Innovation and Employment