24/07/2026
New Zealand's construction sector is facing its biggest shake-up in over 20 years.
The Building Amendment Bill proposes the most significant overhaul of the Building Act since 2004 and the headline change is a shift from joint and several liability to proportionate liability. Each party would only be liable for the share of loss attributable to their own conduct, aligning NZ with a model Australia has used for three decades.
Other key changes:
• Home warranties for eligible new residential builds (one-year defect + 10-year structural cover)
• Mandatory PI insurance for design professionals on qualifying $100k+ projects
• Faster consenting, a 10-day fast-track for eligible sustainable builds
• New penalties, up to $150,000 for warranty non-compliance
The select committee reports by 30 December 2026, with changes potentially in force from early 2027.
Get your contracts, insurance and risk cover sorted before it lands. Full breakdown on our site: https://tradielaw.co.nz/tradie-law/resources/2026-07-23--building-amendment-bill.html