Master Build Guarantee vs NZCB Halo — what's the difference?
Short answer
Master Build Guarantee is offered through Registered Master Builders; Halo is offered through New Zealand Certified Builders. Both are 10-year insurance products covering deposit, non-completion, defects, and structural failure. The structures are similar but the wording differs — deposit caps, defects windows, and exclusions vary policy by policy. Read both before signing rather than picking by brand.
Key facts
- Master Build — backed by Berkley Re; offered through Registered Master Builders
- Halo — offered through NZ Certified Builders; underwritten by Stamford Insurance
- Both are tied to membership of their respective association — you can't choose one with the other's builders
- Cost is usually borne by the builder and passed through in the contract price
Coverage comparison
Both cover the same four limbs (deposit, non-completion, defects, structural). Differences live in the sub-limits and exclusions.
Deposit cover: both cap at a percentage of contract price. The exact cap differs by policy year and contract value.
Defects: both run a short general-defects window and a longer structural window. Read the exact periods on the current schedule.
Exclusions: both exclude variations not properly documented, work outside consent, and damage from neglect. Look for any builder-specific exclusion noted on your certificate.
Which to pick
Most homeowners don't choose — they take whichever the builder offers, because the builder has to be a member of the association to issue it. So the real choice is: do you want a Registered Master Builder or an NZCB Certified Builder?
Both schemes have similar quality bars. The bigger predictor of how the warranty plays out is the builder's financial health, not the brand of the policy. A solid builder with either policy is better than a shaky builder with the 'better' one.
Knowing the rules is half the job. The other half is knowing who you're hiring — check any NZ builder's court action, insolvency history, director track record and AI risk score in minutes.
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Related questions
Sources: Registered Master Builders — masterbuilder.org.nz; NZ Certified Builders — nzcb.nz; Stamford Insurance. General information for NZ homeowners, not legal advice — building rules change and vary by council, so confirm critical details on the official source before acting. Last updated 2026-05.