Buying a Service Station: Contaminated Land Considerations

Service stations, whether currently operating or long since closed, are consistently identified by environmental regulators as one of the property types most likely to carry soil or groundwater contamination. Decades of underground fuel storage, historical tank leaks and on-site vehicle servicing mean a former or current service station site needs a fundamentally different due diligence approach to a standard commercial purchase. Skipping this step, or relying only on the vendor's assurances, exposes a buyer to remediation obligations that can attach to the land itself rather than to whoever caused the contamination.

Why Service Stations Carry Elevated Risk

Underground petroleum storage systems, the tanks and pipework that hold fuel below ground, are prone to slow leaks that can go undetected for years, gradually contaminating surrounding soil and, in some cases, groundwater. Even where a site has operated responsibly and tanks have been well maintained, historical practices from decades past, before current tank standards existed, can leave a legacy of contamination that only shows up when soil is properly tested. This is true whether the property is a currently trading service station, a site that has been converted to another retail use, or vacant land where a service station once stood.

Preliminary and Detailed Site Investigations

Before making an unconditional offer, arrange a preliminary site investigation from a suitably qualified environmental consultant. This is largely a desktop review of the site's history, including historical aerial photographs, past land titles, council records and any prior environmental reports, used to build a picture of what has occurred on the site and where contamination is most likely to be found. If the preliminary investigation flags a credible risk, a detailed site investigation follows, involving soil and groundwater sampling at specific locations to determine the type and extent of any contamination present. Your contract should be made conditional on satisfactory results from these investigations, with a clear right to withdraw or renegotiate if contamination beyond an agreed threshold is found.

Regulatory Notification and Site Registers

Every state maintains some form of public register or notification scheme for known or suspected contaminated sites, and a search of these registers should form part of your due diligence regardless of what the vendor tells you about the site's history. The NSW EPA's contaminated land program, for example, maintains a public list of notified sites and tracks underground petroleum storage systems specifically because of how frequently they are associated with contamination. Even if a site does not currently appear on a register, that is not the same as a clean bill of health, since many contaminated sites are only identified once someone actually tests the soil.

Remediation Costs and Who Bears Them

If contamination is confirmed, remediation obligations can be complex to allocate. In some cases, a current owner can be required to remediate contamination they did not cause, particularly once they take title to the land, which is why identifying contamination before settlement rather than after is so important. Special conditions in the contract can require the vendor to complete remediation before settlement, adjust the price to reflect known contamination, or provide warranties and indemnities covering future remediation costs. None of these protections are automatic, they need to be negotiated and drafted into the contract deliberately.

Where a site auditor or accredited environmental consultant has already assessed the land, obtain a copy of the full report rather than relying on a summary letter or verbal assurance from the agent. A short-form summary can omit qualifications and recommended further work that materially change the risk picture. If remediation has previously occurred, ask for validation reports confirming the work met the applicable standard for the intended future use, since a site remediated for industrial use may not meet the standard required if you intend to redevelop for retail or residential purposes later.

Tank Removal, Decommissioning and Ongoing Monitoring

Where underground tanks are being decommissioned or removed as part of a redevelopment, this work is typically subject to its own approval and inspection process, and improperly decommissioned tanks are a common source of later contamination claims. If you are buying land where tanks have already been removed by a previous owner, request the decommissioning records and any validation testing carried out at the time, since informal or undocumented tank removal is a red flag rather than a reassurance.

Insurance, Warranties and Ongoing Licensing

If you intend to continue operating the site as a service station, confirm what licences and registrations, including fuel retailing and underground storage system registrations, need to be transferred or reapplied for in your name, and whether any conditions attach to those approvals because of the site's contamination history. Environmental liability insurance is worth discussing with your broker for sites with any known or suspected contamination history, since standard property insurance rarely covers remediation of pre-existing soil or groundwater issues.

Finance can also be affected. Lenders are often cautious about security over land with any contamination history, and some will require their own environmental report or a higher level of comfort before approving finance secured against a former or current service station. Factoring this into your finance timeline early avoids a late surprise where a lender's own due diligence takes longer than expected and puts pressure on your settlement date.

Working With the Right Advisers

A service station purchase benefits from a coordinated team: an environmental consultant to assess physical risk, a conveyancer to build the right conditions and protections into the contract, and where the contamination picture is complicated, a lawyer experienced in environmental liability. Bringing these advisers in during due diligence, rather than after exchange, gives you the ability to walk away or renegotiate if the site does not stack up. A general due diligence checklist for commercial property purchase is a reasonable starting point, but it needs a contamination-specific layer added for any site with a fuel retailing history.

If the deal also involves selling an existing property to fund the purchase, tell your conveyancer early so a commercial sale and this purchase can be coordinated on a realistic timeline. For general questions about how the process works before you commit to a contract, our FAQ page or a direct call through our contact page are both a good starting point.