Start with a clear job brief
The quality of your quotes depends on the quality of your brief. If you ask three builders to quote on three different versions of the same job, you’ll get three hard-to-compare prices.
Before you request quotes, put together a short written scope that explains:
- what you want built, repaired, removed or altered
- the address and access details
- whether the property is occupied
- any photos, plans, measurements or sketches you have
- the standard of finish you want, such as basic, mid-range or high-end
- any fixtures, fittings or materials you want included or excluded
- whether you already have council consents, engineering, architectural drawings or inspections
If your job is small — for example a deck repair, internal wall removal, bathroom alteration or recladding work — photos and rough dimensions may be enough for a first-look quote. For larger work, such as an extension, major renovation or new build, a proper site visit and plans are essential.
The more specific you are, the less likely you are to get quotes based on guesswork.
Know when your project may need consent or specialist trades
In New Zealand, not every job needs a building consent, but many alterations, additions and structural changes do. If a consent is needed, it can affect both the quote and the timing.
As a homeowner, check whether your builder has allowed for:
- building consent application fees
- council inspections
- engineering design or producer statements where required
- compliance documentation at the end of the job
- delays waiting for consent approval or inspection availability
Also remember that some work must be done by the right licensed tradespeople:
- plumbing, gasfitting and drainlaying are restricted work under the Plumbers, Gasfitters and Drainlayers Board (PGDB)
- electrical work is regulated by the Electrical Workers Registration Board (EWRB)
A builder may manage or coordinate these trades, but they should not be pricing specialist work as if anyone can legally do it. If your project includes these elements, make sure they are clearly identified in the quote.
How to request quotes from builders
For most jobs, aim to get at least three written quotes. That gives you a realistic picture of the market without creating too much admin for you or the builder.
When you contact builders, ask for:
- a site visit before quoting, if the job is more than very minor work
- a written quote rather than a rough verbal estimate
- confirmation of whether the price is fixed or charge-up
- a clear list of inclusions and exclusions
- the expected timeframe and start date
- details of any assumptions they are making
- confirmation they are available for your programme
Be upfront about your budget if you have one. A good builder can often suggest ways to adjust the scope, materials or sequencing to keep the job affordable without cutting corners.
If you’re comparing builders in a tight labour market, factor in availability as well as price. In NZ, good builders can be booked well ahead, particularly in peak building seasons and in busy centres where demand is high.
What a good builder quote should include
A proper quote should help you understand exactly what you’re paying for. At a minimum, it should include:
| Item | What to look for |
|---|---|
| Builder details | Business name, contact person, and NZ business number if provided |
| Scope of work | Clear description of the work included |
| Price type | Fixed price, estimate, or charge-up basis |
| Labour | What labour is included and whether subcontractors are included |
| Materials | What materials are included, and whether specific brands/products are named |
| GST | Whether the quoted amount is inclusive or exclusive of GST |
| Exclusions | What is not included, such as painting, rubbish removal or council fees |
| Prime cost items | Allowances for items you will select later, such as fittings or cabinetry |
| Provisional sums | Estimated allowances for work that cannot be fully priced yet |
| Timing | Estimated start date and programme |
| Payment schedule | Deposit, progress payments and final payment timing |
| Warranties | Any workmanship warranty or product warranties |
The more the builder spells out, the easier it is to compare one quote against another.
Fixed price vs charge-up: what’s the difference?
The pricing model matters just as much as the headline number.
A fixed price quote means the builder agrees to do the defined scope for a set amount, provided nothing significant changes. This gives you cost certainty, but only if the scope is tight and the quote is detailed.
A charge-up quote means you pay for actual time, labour, materials and sometimes subcontractors, usually at agreed hourly or daily rates plus margin on materials. This can suit jobs with unknowns, such as hidden damage, renovation work in older homes, or projects where the design is still evolving.
When fixed price can work well
- you have final plans and a clear scope
- the job is straightforward
- allowances and exclusions are well defined
- you want budget certainty
When charge-up can make sense
- the site has unknown conditions
- there may be concealed issues behind walls, floors or cladding
- the design is still changing
- the builder cannot reasonably price all risks upfront
If you choose charge-up, ask for:
- hourly or daily rates for each labour category
- whether travel time is charged
- what markup applies to materials and subcontractors
- how often you’ll receive cost updates
- a spending cap or approval threshold for variations
Compare quotes on the same basis
The cheapest quote is not necessarily the best value. The trick is to compare quotes line by line, not just at the bottom of the page.
Look for whether each builder has priced the same scope, using the same assumptions. A quote may appear cheaper because it leaves out items another builder has included.
When comparing, ask yourself:
- Are the plans and specifications identical?
- Have all builders seen the same site information?
- Are council fees, consent costs or engineering included or excluded?
- Are materials and fittings specified to the same level?
- Is rubbish removal included?
- Has one builder allowed for higher-quality finishes than the others?
- Are provisional sums or PC items hiding costs that will be added later?
If one quote is much lower, don’t assume the builder is simply more efficient. It could mean they have missed something, excluded major work, or are planning to recover costs later through variations.
Watch out for prime cost items and provisional sums
These are common in NZ building quotes, especially for renovations and new builds.
A prime cost item is an allowance for something you haven’t selected yet, such as taps, tiles, appliances or door hardware. The builder includes a budget figure, but the final cost changes once you choose the actual product.
A provisional sum is an estimate for work that cannot be accurately priced at quoting stage, such as excavation, hidden structural repairs or drainage adjustments.
These allowances are not necessarily bad, but they need to be realistic. If the allowance is too low, the quote can look cheaper than it really is.
Ask the builder:
- how the allowance was calculated
- what happens if the actual cost is higher or lower
- whether the builder’s margin applies to the final amount
- whether you can choose items within the allowance before the contract is signed
Spotting a quote that is too cheap
A low quote can be attractive, especially if you are trying to keep a renovation affordable. But a quote that is unusually cheap compared with the others should be treated carefully.
Common warning signs include:
- vague wording like “as required” or “allowance to be confirmed”
- lots of exclusions with little detail
- no site visit before pricing a complicated job
- unrealistically short timeframes
- very low provisional sums or prime cost allowances
- no mention of consent, inspection or compliance responsibilities
- reluctance to put anything in writing
- pressure to sign quickly with a “special price”
A very cheap quote may also indicate the builder is underpricing labour, planning to cut corners, or trying to win the job and renegotiate later. That can lead to delays, arguments and extra charges.
Check credentials before you sign
Price matters, but so does who you are hiring.
Before accepting a quote, check:
- whether the builder has relevant experience for your type of project
- references or recent completed projects you can view
- whether they carry appropriate insurance, including public liability
- whether they are a Licensed Building Practitioner if the work involves Restricted Building Work
- whether they use written contracts and variation processes
If the work includes Restricted Building Work, only licensed people can carry out or supervise that work. You should also get the appropriate records at the end of the job.
For larger jobs, ask what contract they use and how they handle variations, delays, defects and dispute resolution. A good contract protects both sides.
Make sure the payment schedule is sensible
A quote should ideally show how and when payments will be made. In NZ, builders often use progress payments for larger jobs, but the schedule should match actual stages of work.
Be cautious if:
- the deposit is unusually high
- payment is demanded before work has started with no clear reason
- milestones are vague, such as “when complete enough”
- the final payment is too large compared with the rest
A sensible payment schedule helps protect cash flow for both you and the builder. It also creates a natural check-in point for quality and progress.
Ask the right questions before choosing
Once you have quotes in hand, don’t just compare numbers. Talk to each builder and clarify anything unclear.
Useful questions include:
- What exactly is excluded from this quote?
- What assumptions have you made about the existing structure or site conditions?
- What happens if we find hidden damage during demolition?
- Are council fees, inspections and compliance documents included?
- Who is managing subcontractors and specialist trades?
- How do you handle variations and cost overruns?
- When can you realistically start, and how long will the job take?
The best builder for your job is not always the cheapest or the busiest. It’s the one who has priced the work clearly, understands the scope, communicates well and can deliver it properly.
The best way to compare builder quotes
If you want a fair comparison, use this simple process:
- Give every builder the same brief, plans and photos.
- Ask for written quotes, not estimates unless the job is too uncertain.
- Check that GST is shown clearly.
- Compare inclusions, exclusions, allowances and assumptions.
- Confirm whether the price is fixed or charge-up.
- Check licences, insurance and relevant experience.
- Choose on overall value, not just the lowest number.
Taking the time to do this properly can save you thousands of dollars and a lot of stress later. A well-prepared quote is usually a sign of a well-run building job.
Registered Master Builder
Licensed Building Practitioner (LBP)
