Business Law Library & Tracker
Construction & Trades
Construction contracts, payment claims, project risk, building work and trade regulation.
Sources last reviewed 7 Sept 2026
Main law guides
158
Acts, regulations and codes worth reading first
Topics
60
Plain-English clusters
Published case explainers
98
Selected cases with a business lesson
Tracked updates
13
New, amended & reviewed
Plain-English explainers, not legal advice. Use the linked official source for section-level detail, and get advice for your situation.
Get legal helpMain laws
Building Act 2004
2004 No 72
Construction Contracts Act 2002
2002 No 46
Plumbers, Gasfitters, and Drainlayers Act 2006
2006 No 74
Registered Architects Act 2005
2005 No 38
Building Research Levy Act 1969
1969 No 23
Cases
Yan v Mainzeal Property and Construction Ltd (in liquidation)
Directors of a group company need evidence that promised support is real, sufficient and available when required. Comfort from a shareholder or related company is...
Commerce Commission v Steel & Tube Holdings Limited
A standards claim must be supported by the actual testing method, sample selection and certification chain. Repeating a supplier or laboratory statement is not...