Buying a House to Demolish? The Hidden Asbestos That Could Cost Developers Thousands

Buying a House to Demolish? Don’t Assume You Know What’s Hidden

Recently, Asbestos Safe Consultancy was engaged by a property developer to complete a pre-purchase asbestos inspection on a residential property that was intended for demolition.

The developer wanted to understand exactly what asbestos-containing materials were present before committing to the purchase and budgeting for demolition works.

What we discovered reinforced why every older property should be inspected before redevelopment.

Asbestos Exterior Cladding Throughout the Property

The inspection identified asbestos-containing fibre cement cladding across the exterior of the home.

Although bonded asbestos products can often remain in place if left undisturbed, demolition changes everything. Before the structure can be demolished, these materials generally require appropriate management and removal in accordance with New Zealand regulations.

Identifying these materials before purchase allows developers to accurately budget for asbestos removal rather than discovering unexpected costs after settlement.

Friable Textured Ceilings Throughout the Home

Inside the property, textured ceiling coatings were identified throughout multiple rooms.

Textured ceiling coatings are significant because they may be friable asbestos-containing materials , meaning they can release fibres more readily if disturbed.

For demolition projects, these materials can substantially change both the removal methodology and project costs.

Hidden Asbestos Beneath New Flooring

One of the most significant discoveries wasn’t visible at all.

A recently installed vinyl floor concealed an older layer of paper-backed vinyl sheet flooring underneath.

The older flooring was identified as asbestos-containing material.

Without lifting sections of flooring during the inspection, this asbestos would likely have remained hidden until demolition commenced, resulting in unexpected delays and additional costs.

Other Asbestos Risks Identified

The inspection also identified several additional asbestos-containing or presumed asbestos-containing materials, including:

• Exterior fibre cement cladding.

• Friable textured ceiling coatings.

• Paper-backed asbestos vinyl flooring beneath newer flooring.

• Presumed asbestos soffits.

• Asbestos cement electrical switchboard backing inside the dwelling.

• Asbestos cement switchboard backing within the detached shed.

Finding multiple asbestos products in a single property is not uncommon in homes built before asbestos was phased out.

Why Developers Should Never Skip a Pre-Purchase Asbestos Inspection

Many developers budget for demolition but overlook the potential cost of asbestos removal.

A pre-purchase asbestos inspection provides valuable information before contracts become unconditional, helping developers understand:

• Likely asbestos removal costs.

• Potential demolition delays.

• Health and safety obligations.

• Areas requiring licensed asbestos removal.

• Hidden asbestos materials that are not immediately visible.

Knowing this information before purchase can prevent significant financial surprises later.

Planning to Buy an Older Property?

If you’re purchasing an older property for demolition, renovation or redevelopment, an independent asbestos inspection is one of the smartest investments you can make.

At Asbestos Safe Consultancy, we provide independent asbestos inspections across Hawke’s Bay, Gisborne, Taupō and the lower North Island, helping property developers, builders and homeowners make informed decisions before work begins.