What a quantity surveyor should and shouldn’t do A quantity surveyor (QS) helps estimate, measure, and manage the cost of a building project. In New Zealand, homeowners often hire a QS for renovations, new builds, insurance claims, feasibility studies, or tender pricing checks. A good QS should give you clear, evidence-based cost advice, help compare quotes, and reduce the risk of budget blow-outs.
A QS is not the same as a builder, project manager, architect, or engineer. They should not be “selling” you the cheapest possible quote by cutting corners, and they should not pressure you into using a particular contractor unless they have disclosed any relationship clearly. If the person you hire seems more interested in steering the job to one builder than in helping you understand the costs, that’s a red flag.
Common quantity surveyor scams and rip-offs in NZ Most QS problems are not dramatic “scams” in the movie sense. More often, they involve inflated invoices, vague scope, poor conflict-of-interest disclosure, or reports that look professional but contain little usable detail.
Here are the most common issues NZ homeowners run into:
| Red flag | What it can look like | Why it’s a problem | |---|---|---| | Vague fee structure | “We’ll sort the numbers later” or no written scope | Easy for costs to blow out without warning | | Inflated or padded reports | Extra hours, duplicated measurements, or generic allowances | You pay for work that adds little value | | Conflict of interest | The QS pushes one builder or supplier | Advice may be biased | | Unrealistically low estimate | Quote looks much cheaper than others, then grows later | Can lead to false confidence and budget stress | | Payment pressure | Upfront payment demands or urgency tactics | Makes it harder to compare or walk away | | No credentials or experience | No relevant membership, references, or NZ project experience | Higher risk of poor advice |
1. The “cheap quote” that isn’t cheap A common rip-off is a QS quote that looks very low at first, but excludes important work. You might later be billed extra for site visits, measuring, revisions, tender analysis, or variations that should have been discussed upfront.
To protect yourself: - Ask exactly what is included in the fee. - Get the scope in writing, including site visits, revisions, and meetings. - Ask whether the fee is fixed, hourly, or a percentage of the project cost. - Check whether GST is included. - Ask what triggers extra charges.
2. Inflated hourly billing or duplicated tasks Some homeowners are caught out by invoices that include time for tasks they never authorised, or repeated charges for the same document. You may also see broad descriptions such as “project management support” without any detail.
Protect yourself by asking for: - itemised invoices; - timesheets or a breakdown of hours if billed hourly; - a copy of the deliverable, such as the estimate, bill of quantities, or report; - written approval before any work beyond the agreed scope.
3. Conflicts of interest and kickbacks A QS should be independent. If they are receiving referral fees, rebates, or discounts from a builder, supplier, or subcontractor, that relationship must be disclosed. Otherwise, you may not be getting impartial advice.
This matters in NZ because many homeowners rely on a QS to compare tenders fairly, especially during renovation or rebuild work when costs are changing fast due to labour shortages, material price swings, and seasonal demand.
Be cautious if the QS: - only recommends one contractor; - discourages you from getting multiple quotes; - has close links to a builder but does not disclose them; - seems to overstate one quote’s problems while praising another.
4. “Insurance claim specialists” who overpromise After storms, floods, leaks, or fire damage, some operators market themselves as insurance claim experts and promise a bigger payout. A legitimate QS can help assess reinstatement costs, but no one can guarantee what an insurer will accept.
Watch out for: - promises of a “sure win” or “maximum payout”; - pressure to sign immediately after a disaster; - fees based on a percentage of the claim without clear explanation; - poor explanation of what is excluded, especially depreciation, upgrades, or council-related costs.
If your property is damaged, get clear advice in writing and keep your own records of photos, receipts, temporary accommodation costs, and communications with the insurer.
5. Underquoting to win the job, then upselling later Another common problem is a QS estimate that is unrealistically low because it omits likely costs such as demolition, consent fees, scaffolding, rubbish removal, or site-specific issues. Later, you are told the estimate “didn’t include” things that any proper pre-build assessment should have flagged.
In NZ, this is especially risky if your project involves older homes, hillside sections, weather-tightness issues, damp subfloors, asbestos, or unplanned council requirements. A good QS should identify assumptions clearly and explain what could move the price.
How to check a quantity surveyor before you hire them You do not need to be an expert to do basic checks. A few minutes upfront can save a lot of money later.
Ask for these details - Full legal business name and NZ contact details - Relevant experience with projects like yours - Fee structure and what is excluded - Whether they carry professional indemnity insurance - References from recent NZ clients - Any memberships or professional affiliations
Do your own verification There is no single government licensing regime for quantity surveyors in NZ like there is for electricians or many plumbing and gasfitting trades. That means you need to check reputation and competence carefully yourself.
Useful checks include: - searching for the business name online and reading recent reviews critically; - asking for examples of similar work, with sensitive details removed; - checking whether they belong to a recognised professional body; - making sure the person doing the work is the person you spoke to; - confirming they understand local council requirements, tendering, and NZ building practice.
If the QS is also acting as a project manager, cost adviser, or claims consultant, ask how those roles are separated and where their duty to you begins and ends.
Questions to ask before you sign anything Use these questions before agreeing to any work:
- What exactly will you deliver? - How many site visits are included? - Is this a fixed fee, hourly rate, or percentage? - What extra costs could apply? - Will you explain all assumptions and exclusions? - Have you worked on similar NZ homes or renovations? - Do you have any relationship with builders, suppliers, or insurers involved? - Can I have the quote and scope in writing before I commit?
If the answers are vague, defensive, or rushed, take that seriously.
Protecting yourself during the job Even a reputable QS can become expensive if the scope keeps changing. Good process matters.
Best practice for homeowners - Keep all quotes, emails, reports, and invoices in one place. - Ask for progress updates if the job is complex. - Confirm any change to scope, fee, or timing in writing. - Don’t rely on verbal promises made at the kitchen table. - Compare at least two or three quotes for bigger jobs. - If your renovation needs building consent, make sure the builder and designer are handling the consent process correctly with the local council.
Remember that some parts of a renovation are restricted or regulated work in NZ. Plumbing, gasfitting, and drainlaying are restricted work under the PGDB, and electrical work must be carried out by appropriately authorised people under the EWRB framework. A QS may cost those elements, but they should not be presenting themselves as the practitioner doing regulated work unless they are properly authorised.
What to do if you think you’ve been ripped off If you suspect a quantity surveyor has overcharged you, misled you, or failed to disclose a conflict of interest, act quickly but calmly.
Step 1: Gather your evidence Collect: - the signed quote or agreement; - emails and text messages; - invoices and payment records; - the report or estimate provided; - notes of any verbal promises, with dates and times; - photos or documents showing the work done, if relevant.
Step 2: Raise the issue in writing Contact the business and explain what you believe is wrong. Be specific: - which invoice or report is disputed; - why you think the charge or advice is incorrect; - what outcome you want, such as a revised invoice, refund, or correction.
Keep the tone firm and factual.
Step 3: Ask for a formal review If the business does not resolve it, ask for their complaints process. A reputable provider should have one. If they belong to a professional body, you may also be able to make a complaint through that organisation.
Step 4: Escalate if needed Depending on the situation, you may consider: - contacting your bank or card provider if you paid by card and the payment was taken in error; - getting independent advice from a Citizens Advice Bureau or community law centre; - seeking legal advice for larger losses; - reporting suspected fraud to Police if you believe you have been deliberately deceived.
If the issue involves broader consumer rights, the Fair Trading Act and the Contract and Commercial Law Act may be relevant, especially where misleading statements or unfair billing are involved.
How to reduce your risk on future projects The best defence is a clear paper trail and a bit of scepticism.
For any renovation, extension, or insurance repair: - get multiple written quotes; - compare exactly what is included, not just the total price; - ask for assumptions and exclusions to be stated plainly; - use staged payments tied to milestones, not large upfront sums; - avoid pressure to sign on the spot; - choose people who can explain costs in plain English.
In the NZ market, where labour can be tight and material prices can shift quickly, a good QS can be extremely valuable. The key is to make sure you are paying for honest, transparent advice — not marketing, hidden commissions, or padded invoices.
A careful check at the start is much cheaper than trying to fix a bad decision later.