23/07/2026
5 Mistakes Landowners Make When Dealing With Compulsory Acquisition
If a government agency has told you your land is needed for a public work - a road, a pipeline, a flood protection scheme - it can feel like the decision has already been made and there is nothing you can do.
That is not true. The Public Works Act 1981 gives landowners real rights. But in my experience working alongside affected landowners, I see the same mistakes made again and again. These mistakes cost people money, time, and peace of mind.
Here are the five most common ones.
1. Accepting the first offer without getting independent advice
The acquiring authority will commission its own registered valuer. That valuer is a professional acting in good faith - but they are instructed by the Crown, not by you.
In one case I worked on, the Crown's initial valuation was $255,000 below the landowner's own registered valuer's assessment. That is not a rounding error. It is a structural gap that only emerged because the landowner sought independent advice.
You are entitled to get your own valuation. You are entitled to have your reasonable costs paid by the acquiring authority which includes an independent valuation and professional advice.
Why would you attempt to do your own negotiation when you can have a paid professional do it for you.
Do not sign anything until you have done this.
2. Treating the land value as the only claim
The land value is just one part of what you may be entitled to. The Public Works Act also provides for:
Disturbance payments - costs of moving, relocating a business, or disruption to your life
Business loss - if your business is damaged or destroyed by the acquisition
Associated land - if only part of your land is taken but the rest is also affected
In the case I mentioned above, the landowners ran a market gardening business. The land being acquired was only part of their operation - but the designation forced them to over-crop their remaining block for years, causing soil degradation and a significant drop in revenue. That is a real, compensable loss. But it only gets recognised if you claim it.
Do not leave money on the table by focusing only on the headline land price, there are many moving parts to any land acquisition – we know where to look and find them.
3. Assuming the valuation methodology is correct
Registered valuers typically use the comparable sales method - they look at what similar properties have sold for and apply that to yours. This works well when there are genuinely comparable sales.
But what if there are none?
Specialised land - market gardens, orchards, unique productive soils - is rarely sold. Owners hold it, work it, and pass it on. When valuers are forced to use lifestyle block or rural residential sales as comparables, the result can significantly undervalue what your land is actually worth in productive use.
In those situations, an income capitalisation approach - valuing the land by what it earns - may be far more appropriate. The Turner Principle, which both Crown and private valuers are bound by, requires land to be valued at its highest and best use. If the comparable sales method cannot do that, a different methodology should be used.
This can include having your land assessed for a high value subdivision and have that included in the valuation if it values more than it is currently used for.
Challenge the methodology, not just the number.
4. Not documenting the impact from day one
The moment you receive formal notice that your land may be required, the clock starts. Every decision you make from that point -what you invest, what you don't invest, how you manage your property - is shaped by the designation.
In the case I worked on, the landowners made a completely rational decision not to reinvest $60,000 into a block the Crown had flagged for acquisition. That decision had consequences for their remaining land over the following years. But because they did not document it carefully at the time, connecting the dots years later required detailed financial records, soil science evidence, and expert analysis.
Keep records of everything: what you spent, what you chose not to spend, and why. If your business or farming operation changes because of the designation, document that too. Your future claim may depend on it.
We have specialists in just every field of land use and can source other specialist advice as it is required.
5. Feeling pressured to sign before you are ready
Acquiring authorities sometimes move quickly. Proclamation - the Crown's power to compulsorily acquire your land -can feel like a threat hanging over the process. In some cases, landowners receive notice that a Proclamation recommendation is being prepared at the same time they are being asked to sign a settlement agreement.
You have the right to negotiate. You have the right to take legal and valuation advice. You have the right to refer unresolved disputes to mediation and if that fails then the Land Valuation Tribunal.
Signing under pressure - before your claims are properly assessed and reserved - can close off rights you did not know you had. Make sure any agreement you sign expressly reserves your right to pursue outstanding claims, including business loss, before you put pen to paper.
The bottom line
Compulsory acquisition is one of the most significant things that can happen to a landowner. The Public Works Act is designed to ensure you are no worse off after the process than before it. But that outcome does not happen automatically - it requires you to understand your rights, get the right advice, and advocate for a fair result.
If you are facing a compulsory acquisition and want to understand your options, feel free to reach out.
Richard Laurenson is a Senior Property Consultant at Land Matters, based in Ōtaki. He has represented landowners in Public Works Act negotiations and mediations across New Zealand.
Understand your rights under the Public Works Act compensation for property impacts. Learn how to navigate this process.
