Signed and sealed? Not so fast – why legal advice on your Master Build Contract matters

Commercial Law
Property Law
May 29 2025

When embarking on a residential building project in New Zealand, many homeowners choose to engage a Registered Master Builder. One of the key documents involved in such projects is the Master Build Contract — a standardised building contract provided by the Registered Master Builders Association, which provides access to the well-known Master Build 10-Year Guarantee. While this contract offers protections for both parties and a structured framework for the build process, obtaining independent legal advice before signing is crucial. Here’s why:

1. Understanding the legal implications

A Master Build Contract is a legally binding agreement. Legal jargon and standard clauses can sometimes obscure obligations or risks. A lawyer can clarify key clauses, such as:

  • Payment terms and what happens in case of delays or cost overruns
  • Liability clauses that may shift risk to the homeowner
  • Termination provisions and how you can (or cannot) exit the contract

This understanding helps you make informed decisions and avoids unpleasant surprises during the project.

2. Identifying potential risks

Although the Master Build Contract aims to protect both the homeowner and the builder, it may not always cover every scenario relevant to your specific project. Legal advice can help identify risks such as:

  • Ambiguous clauses that could be interpreted in multiple ways
  • Inadequate provisions for project delays or cost overruns
  • Unfavourable terms that could leave you financially exposed

A lawyer may recommend amendments or additional clauses to better protect your interests.

3. Customising the contract for your project

Every building project is unique, and a standard form contract may not cater to your specific needs. Legal professionals can help tailor the contract to:

  • Reflect agreed variations to the build
  • Include milestone-based payment terms
  • Address site-specific issues (e.g. land covenants, access, or zoning conditions)
  • Tie in with a contemporaneous land purchase

Customisation ensures the contract aligns with the realities of your build.

4. Protecting your financial investment

Building a home is often one of the largest financial investments a person will make. The Master Build Contract includes provisions around pricing, deposits, and progress payments — all of which can have major financial implications if misunderstood or mishandled. A lawyer can:

  • Review payment terms to prevent overpayment or under-delivery
  • Ensure retention money is handled correctly in accordance with the Construction Contracts Act 2002
  • Advise on guarantees and insurance coverage provided under the Master Build 10-Year Guarantee
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