The House Was Gone. The Asbestos Wasn’t.

The House Was Gone. The Asbestos Wasn’t.

It looked like an empty section.

The house was gone, the land was vacant, and the owner wanted to place a tiny home on the property.

But when she approached the council about her plans, the property records raised a simple question.

There used to be an older house on this site. Where had it gone?

The answer was underground.

A House Lost After Cyclone Gabrielle

The property had belonged to the client’s father and had been affected by Cyclone Gabrielle.

Following the flooding, a contractor was brought in to demolish the old house. But instead of all the demolition material being removed from the property, the remains of the house had been buried onsite.

By the time I was contacted, there was no longer a house standing on the section.

To anyone looking at the property, it simply appeared to be vacant land.

But the history of the building had not disappeared with the house.

Council Records Raised the Question

Because council records showed that an older house had previously stood on the property, the owner was asked to investigate what had happened to it before progressing with plans for the tiny home.

That led to Asbestos Safe Consultancy being engaged to carry out asbestos testing of the soil.

The concern was straightforward.

If an older house had been demolished and the demolition waste buried onsite, asbestos-containing building materials may also have been buried with it.

The Evidence Was Visible in the Soil

During the soil investigation, I began finding fragments of fibre cement while digging into the ground.

This immediately increased the concern that demolition materials from the former house had been buried across the site.

Multiple soil samples were collected and sent to an accredited laboratory for asbestos analysis.

The results confirmed the concern.

The majority of the soil samples returned positive results for asbestos.

What had initially appeared to be an empty section was, in reality, land affected by asbestos-contaminated demolition material.

Demolishing a Building Does Not Make the Asbestos Disappear

This case highlights an important issue with the demolition of older buildings.

If asbestos-containing materials are not properly identified and managed before demolition, the problem does not disappear when the building comes down.

If demolition waste is crushed, spread or buried onsite, a building asbestos problem can become a contaminated-land problem.

Once asbestos-containing fragments become mixed through soil, the situation can become significantly more difficult and expensive to manage.

Instead of dealing with identifiable asbestos materials within a standing building, the contamination may now be distributed through the ground.

The Real Cost Came Later

The most difficult part of this job was not finding the asbestos.

It was what the discovery meant for the property owner.

The section was already heavily disturbed and the asbestos contamination was widespread. The realistic way forward involved removing and remediating the affected soil.

That came at a cost the owner could not afford.

As a result, she was unable to proceed with her plan to place a tiny home on the property.

A decision made during the demolition of the previous house had created a problem that remained long after the building itself was gone.

An Empty Section Does Not Always Have an Empty History

Vacant land can look clean.

A demolished building can look like it has completely disappeared.

But the history of a property can remain beneath the surface.

For older buildings, particularly those damaged by fire, flooding or natural disasters, proper asbestos identification before demolition is critical.

The cost of identifying and managing asbestos before demolition can be significant.

But the cost of dealing with asbestos after it has been demolished, broken up and buried through a property can be far greater.

The house was gone. The asbestos wasn’t.