Demolition, Asbestos and Boundary Risks

Renovations, extensions and knock-down rebuilds begin with an existing site, not a blank sheet. Demolition, hazardous materials, neighbouring property and uncertain boundaries can introduce risks before the new work even starts.

Define the demolition scope

Identify exactly what is to be removed and what must remain. Include structures, paving, vegetation, services, footings, tanks, fences and debris. Ambiguous demolition scope can produce early variations.

Asbestos requires specialist management

Older buildings may contain asbestos-containing materials. Identification, removal, transport and disposal are regulated activities. Do not treat suspected asbestos as an ordinary demolition item.

Unexpected hazardous material can affect cost and time

Understand whether the contract price includes investigation or removal, what happens if concealed hazardous material is found and who must give notices or obtain specialist advice.

Boundaries should not be guessed

Fences are not always on the legal boundary. New buildings, retaining walls and setbacks should be based on reliable survey information where required.

Neighbouring property needs protection

Demolition and excavation can affect adjoining structures, fences, retaining walls and services. Pre-construction photographs and condition records can be valuable if later damage is alleged.

Services must be identified

Existing electricity, gas, water, sewer and communications services may require disconnection, protection or relocation. Determine whether these works are included and who coordinates them.

Heritage and approval constraints may apply

Depending on the property and locality, demolition or alteration may be constrained by approvals or heritage considerations. Ensure the proposed scope is capable of being lawfully carried out.

Questions to ask

What exactly is included in demolition? Has asbestos or other hazardous material been assessed? Is a survey required? Who deals with service disconnections? What protection or records are needed for adjoining property?

The key lesson

The risks in an existing site can be as important as the risks in the new building. Resolve as much of the unknown scope as practicable before fixing the price.

Before You Sign

This guide provides general educational information for South Australian homeowners. It is not personalised legal advice. The effect of any issue depends on the wording of your own contract, schedules, Special Conditions, plans, specifications and the facts of the project. A good builder and a well-understood contract should work together. Before committing to one of the largest financial transactions you may ever undertake, consider having the actual contract reviewed so you understand the obligations, notice requirements and consequences before they are tested on site.

Before You Build. One Signature. One Chance.