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The 2013 edition made cost fluctuations opt-in, and most contracts left them switched off. NZS 3910:2023 reverses that: a fluctuation adjustment applies unless the parties exclude it in Schedule 1. Here is how the mechanism works, how the adjustment is calculated off Stats NZ indices, and why it changes what you should be doing at tender.

How to price a construction tender in NZ from first principles, surface the hidden ~25% risk loading most subbies bury in their rates, and win on a defensible price.

NZS 3915 vs 3910 explained: 3910 has an independent certifier, 3915 has none — the principal certifies its own job. What that means for NZ contractors.

Form 1 of the Construction Contracts Regulations must accompany every payment claim on post-2015 contracts. Here is what section 20 of the CCA requires a valid payment claim to contain, and how the responding payment schedule works.

Where construction tenders in Auckland are actually published — GETS, Auckland Council and its CCOs, Kāinga Ora and the private main-contractor pipeline — and how to win them in NZ's most crowded tender market.

Where Christchurch and Canterbury construction tenders are actually published — GETS, council portals, head-contractor lists — and how to win them with prequalification and pricing discipline.

A QS report is a written, itemised assessment of construction cost that a bank, insurer, tribunal or client can rely on. This NZ guide covers the six types of QS report, who is allowed to prepare them, what a good one contains, and realistic 2026 cost ranges.

Owed money on a NZ construction job? The Construction Contracts Act gives subcontractors and contractors a recovery ladder — valid payment claims, debt due when no payment schedule arrives, suspension rights, retentions on trust, and fast, binding adjudication. Here is each rung in order.

Worried your builder's progress claim is too high? Here is how to spot over-claiming in NZ, what a fair claim looks like, and how to respond on time.

Retentions not released on a commercial NZ job? Since 5 Oct 2023 retention money is held on trust in a separate account — the head contractor cannot use it as working capital. Here is how to get yours back.

Unforeseen ground conditions who pays in NZ depends on how the risk was allocated at tender. Here is how rock, soft ground and extra piling costs are decided.

Getting back-charged for work you never priced? Here is how the subcontract scope gap in NZ creates back-charges, and the pre-tender checks that stop it.

Special conditions quietly rewrite an NZS 3910 building contract and shift risk onto you. Here are the clauses to watch in NZ and how to read the schedule.

If the Principal causes the delay and the completion date is never validly extended to cover it, the fixed date can fall away entirely — time goes 'at large.' Here is how the prevention principle works under NZS 3910:2023, why it can wipe out a liquidated damages claim, and what protects each side.

Picking up another company's half-built job looks like easy work at a good price. It rarely is. Here's the independent analysis that reprices the remaining scope and puts numbers on the inherited risk before you commit.

Notes from the Hubexo Construction League panel at BuildNZ 2026, Auckland Showgrounds: the heads of Naylor Love, Hawkins and Dominion Constructors on why building got slower, where the pipeline actually is, and the one warning about risk every subcontractor should have heard.

You won the extension of time, but who pays for the extra weeks on site? Under NZS 3910:2023 an extension of time protects you from liquidated damages — it does not automatically pay your prolongation costs. Here is when the time-related cost is recoverable, and how it is valued.

You hit rock, contaminated fill or a buried obstruction the drawings never showed. Under NZS 3910:2023 clause 9.5.4 that is treated as a Variation — but only if it passes the experienced-contractor test and you notified in time. Here is how the entitlement actually works.

Every legitimate place to find construction tenders in NZ — government sites, private platforms, council channels, and subcontractor registers.

NZ estimating services cost low-hundreds to low-thousands per tender — against a six-figure in-house estimator salary. What to buy, and when.