Land Remediation Relief Explained: Tax Support for Cleaning Up Contaminated or Derelict Land

If your business is investing in the clean-up of contaminated or derelict land, you may be entitled to a Corporation Tax relief that many companies never realise exists.

Land Remediation Relief (LRR) is a statutory tax incentive introduced to encourage the regeneration of land that has been affected by past industrial use or left derelict for extended periods.

Yet, despite being clearly set out in the HMRC Corporate Intangibles Research and Development Manual (CIRD60000 onwards), it remains under-claimed, often because it’s unfamiliar to non-specialist advisers and not typically highlighted during routine tax filings.

What Is Land Remediation Relief?

LRR is available to UK companies subject to Corporation Tax that are incurring expenditure to clean up land acquired for commercial use.

If that land is contaminated or has been derelict for 10 years or more, the company may be eligible to claim an enhanced deduction of 150% of qualifying costs.

Where a company is loss-making, it may instead choose to surrender the loss for a payable tax credit at a rate of 16% of the qualifying expenditure (as outlined in CTA 2009, Part 14).

Who Is Eligible?

This relief is not limited to large developers. It applies to any UK company (including property developers, investors, and owner-occupiers) that has acquired land in a state requiring remediation and is using it for a qualifying commercial purpose.

To qualify, the company must not be responsible for the original contamination.

The land must either:

Be contaminated by harmful substances that could cause harm or pollution, such as asbestos, hydrocarbons, heavy metals, or invasive plants like Japanese knotweed

Or

Be long-term derelict, meaning it has remained unused for at least ten years and requires significant restoration, such as demolition of unsafe structures or reinstatement of utilities

It is important to note that residential dwellings developed for sale are excluded unless the property is being retained for rental or another commercial purpose.

What Expenditure Qualifies?

Per HMRC guidance (CIRD62000), qualifying costs typically include:

• Environmental site investigations and contamination surveys
• Removal or treatment of pollutants
• Demolition of redundant or unsafe structures
• Excavation and replacement of contaminated soil
• Reinstatement of utilities necessary for future use (on derelict land)

However, costs are not eligible if:

• The company (or a related party) caused the contamination
• The expenditure has been subsidised or reimbursed (e.g. by grants or insurance)
• The work relates to general building or construction outside of remediation

Why It’s Relevant

With development costs rising and growing environmental pressure to repurpose brownfield sites, this relief is more relevant than ever.

It can improve project viability, increase post-tax returns, and support cashflow in early-stage or speculative developments particularly through the cash credit mechanism.

Claiming the Relief

Land Remediation Relief is claimed through your Corporation Tax return (CT600), and HMRC expects clear evidence to support the claim.

This includes:

Documentation showing the condition of the land at acquisition

• Technical reports on the remediation process
• Detailed breakdowns of qualifying costs
• A timeline of when and why the work was carried out

Getting the claim right is important. While the relief is generous, it is narrowly defined and evidence-heavy.

Working with professionals who understand both the tax legislation and technical scope of remediation under the relief can make the difference between a successful claim and HMRC challenge.

At Signature Concierge, we assist clients by connecting them with specialist tax advisers experienced in preparing robust LRR claims in line with HMRC expectations.

We ensure the process is handled quietly, accurately, and in coordination with your existing professional team.

If you’re working on, or have recently completed, a project involving contaminated or derelict land, it’s worth checking whether a claim is possible, even retrospectively.

For more information or a no-obligation review, contact us.