Quick answer
What homeowners need to know
Choose a contractor using relevant work, references, licence or insurance checks, communication, documentation, capacity and a clear commercial proposal.
Ask who will manage the site daily and how quality, safety and variations are recorded.
Key takeaways
- Verify credentials yourself rather than relying on a logo.
- Ask references how problems were handled, not just how the finished job looks.
- Find out who will actually be on site.
- A useful quote explains scope, assumptions, allowances, exclusions, programme and responsibilities.
Quotes, contracts & delivery
Checks to make when you choose a renovation contractor
Verify credentials yourself rather than relying on a logo. Licensed Building Practitioners can be checked on the public LBP register run by MBIE, which shows licence class and status. Ask which LBP will carry out or supervise any restricted building work, and confirm the business holds suitable contract works and public liability insurance. Request certificates rather than accepting verbal assurances.
Ask references how problems were handled, not just how the finished job looks. Find out whether the programme changed, how variations were priced and approved, and how promptly defects were fixed. Where possible, visit a completed job of similar scope. A contractor who readily connects you with recent clients is giving you useful evidence about how they manage working relationships.
Find out who will actually be on site. The person who prices the job is not always the one who manages it day to day. Ask to meet the site lead, understand how often they will be present, and learn how you will receive updates. Clear answers about communication, health and safety and record keeping are a strong indicator of how the project will run.
Scope before solutions
Decisions to make before committing
Settle these points before an idea becomes an order, contract or construction instruction.
Ask who will manage the site daily and how quality, safety and variations are recorded.
completeness of design and scope information
number and size of provisional allowances
decision speed, variations and access constraints
Practical sequence
A step-by-step planning process
- 01
Define the exact outcome you need and how success will be checked.
- 02
Issue the same scope and information to every contractor being compared.
- 03
Align inclusions, exclusions, allowances, GST, programme and payment terms.
- 04
Record selections, approvals and variations through one agreed communication process.
- 05
Complete inspections, defects, certificates, warranties and maintenance information at handover.
Cost and time
How to build a more reliable budget and programme
A fixed price or completion date needs a measured scope and a site visit. For residential building work, check the current contract and disclosure requirements and obtain legal advice where the agreement or risk warrants it.
Use the calculator, then request a site-specific assessment.
Risk control
Common mistakes to avoid
- A polished sales meeting does not replace evidence of delivery systems and relevant experience.
- accepting a total without reading its assumptions
- authorising changes without written cost and programme effects
Accuracy and compliance
Use current official information
Primary sources used for this guide
- Why contracts are valuableBuilding Performance (MBIE)
- Home renovation and repairConsumer Protection New Zealand
- Planning a successful buildBuilding Performance (MBIE)
Common questions
Frequently asked questions
How do I check if a builder is licensed in New Zealand?
Search the Licensed Building Practitioners register on the MBIE website using the builder's name or licence number. It shows whether the licence is current and which classes the person holds. Restricted building work must be carried out or supervised by an LBP with the right licence class, so confirm who that person is on your project.
What questions should I ask a renovation builder before hiring?
Ask who will manage the site, which LBP will supervise restricted work, what insurance they hold and how variations are priced and approved. Request recent references for similar projects and an example of their progress reporting. Also ask what is excluded from their price and how they handle unexpected discoveries once walls or floors are opened.
Is it a red flag if a builder asks for a large deposit?
It is worth questioning. A deposit may be reasonable for ordering specific materials, but payments should generally reflect work completed or materials secured. Ask what the deposit covers, how it is protected and how it appears in the payment schedule. For significant contracts, get independent legal advice before committing funds.