What Questions Should I Ask Before Signing A Building Contract

Friday 29 May 2026

Signing a building contract is one of the most important steps in the home building process. Once signed, the contract becomes legally binding, and making changes later can be difficult, costly or in some cases not possible at all.

For many buyers, the challenge is not just understanding the contract itself, but knowing what questions to ask before committing. A clear checklist can help you identify risks, confirm what is included, and avoid unexpected costs or misunderstandings once construction begins.

What is a Building Contract

A building contract outlines the agreement between you and your builder. It covers everything from the contract price and inclusions through to timelines, payments and legal protections.

Because these documents are detailed and often technical, it is easy to overlook important details. Many issues that arise during construction can be traced back to something that was not clearly understood or documented before signing.

Taking the time to ask the right questions upfront can make a significant difference to how smoothly your build progresses.

Why You Need A Checklist Before Signing

Building contracts are not simple documents. They bring together pricing, design, construction details and legal terms into one agreement.

Without a structured approach, it is easy to focus on the headline price or design and miss the finer details that can impact your budget and timeline. A checklist ensures you are reviewing each part of the contract properly, rather than relying on assumptions.

This step is about clarity. The more you understand before signing, the fewer surprises you are likely to face during the build.

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Building Contract Checklist: Questions To Ask Before You Sign

Contract Price & Costs

  • What exactly is included in the contract price?

  • Are there any costs not included in the contract price?

  • Is the price fixed, or can it change?

  • How are prime cost items calculated?

  • How are provisional sums calculated and what could cause them to increase?

Understanding the contract price is critical. Prime cost items and provisional sums are allowances, not fixed costs, which means your final price can change depending on selections or site conditions.

Plans & Specifications

  • Are detailed plans and specifications included in the contract?

  • Does the contract match everything agreed during the sales process?

  • Are all inclusions, materials and finishes clearly listed?

  • What happens if something discussed is not written in the contract?

If something is not documented, it may not be included. This is one of the most common causes of disputes during construction.

Progress Payments

  • What is the payment schedule?

  • When are progress payments due?

  • What construction stage triggers each payment?

  • Are payments tied to completed work?

Progress payments should align with actual construction progress, not just timeframes. This helps ensure you are paying for work that has been completed.

Timeline & Build Duration

  • When will construction start?

  • What is the estimated completion date?

  • What happens if there are delays?

  • What conditions allow the builder to extend the timeline?

Build timelines are often affected by weather, approvals and site conditions. Understanding how delays are handled in the contract will help set realistic expectations.

Permits & Approvals

  • Who is responsible for obtaining the building permit?

  • Are planning permits required for this project?

  • What approvals must be completed before construction begins?

Responsibility for permits should be clearly defined. Delays in approvals can impact your entire build timeline.

Changes & Variations

  • Can changes be made after signing the contract?

  • How are contract variations approved?

  • How are variations priced?

  • When are variation costs payable?

Variations are one of the most common sources of additional costs. Understanding the process upfront helps avoid surprises later.

Insurance & Warranties

  • What insurances are included in the contract?

  • Is domestic building insurance provided?

  • What warranties apply to the build?

  • What is covered after handover?

Insurance and warranties provide protection during and after the build, so it is important to understand exactly what is included.

Disputes & Legal Protections

  • What is the dispute resolution process?

  • Is there a cooling off period?

  • What protections do I have if something goes wrong?

  • Should I seek independent legal advice before signing?

Even with a well managed project, it is important to understand your rights and protections in case issues arise.

If you want more in depth look into the building industry terminology, please see our blog Home Building Jargon Explained

Download Checklist PDF

Building With Confidence From The Start

A building contract should provide clarity, not confusion.

By asking the right questions before signing, you can better understand what is included, how the process will unfold and what protections are in place. This reduces the risk of unexpected costs, delays or misunderstandings during construction.

Eight Homes focuses on providing clear and transparent contracts, so you can move forward with confidence knowing exactly what you are signing. Whether you're still doing your research or ready to sign, the Eight Homes team is here to help. Get in touch today.

Frequently Asked Questions