UK Land Remediation Relief: Respond to Brownfield Reform Options Before 21 September

On 13 July 2026 HM Treasury published a consultation on reforming Land Remediation Relief (LRR) — the 150% Corporation Tax relief designed to encourage cleanup and reuse of contaminated or derelict brownfield land. The paper follows an earlier effectiveness review and a Summary of Responses at Tax Update 2026, which concluded that LRR helps some projects but is not fully achieving its regeneration objective.

As of 14 August you have just over five weeks until the consultation closes at 11:59pm on 21 September 2026. The government intends to set out its conclusion at Budget 2026 and, if reforms meet its cost-effectiveness tests, legislate through Finance Bill 2026 with changes taking effect as soon as practicable.

What LRR does today

LRR sits in Part 14 of the Corporation Tax Act 2009. Eligible revenue spend can attract an additional 50% deduction on top of the normal 100% deduction; eligible capital spend can attract a 150% deduction. Capital expenditure that qualifies for capital allowances is outside LRR. Loss-making companies may surrender qualifying losses for a 16% below-the-line cash credit.

Two limbs matter in practice: contaminated land (remedying relevant harm from industrial activity) and derelict land (structures that must be removed before productive use, continuously derelict since 1 April 1998). Relief is generally unavailable where expenditure is subsidised, where the company or a connected interest-holder caused the problem (the polluter-pays principle), or — for landlords — where a tenant caused the contamination.

Reform themes on the table

Aligning with planning processes: options include bringing contamination eligibility closer to definitions used by planners and environmental regulators, expanding the contaminant list for substances commonly found on brownfield sites, and relying more on local-authority discharge notices as primary evidence so developers need fewer bespoke expert reports for tax purposes.

Derelict land: the consultation asks how to redefine long-term dereliction so the relief better matches modern brownfield stock rather than a fixed 1998 start date that freezes many sites out.

Timing of the relief: a key cash-flow proposal would allow LRR to be claimed in the year expenditure is incurred rather than waiting until units are disposed of — reducing multi-year cost tracking while introducing safeguards against double relief when income is later recognised.

Package design: HM Treasury asks whether reforms should land as a combined package or as separable options, with transitional rules and anti-avoidance to keep the relief aimed at genuine remediation.

What developers and advisers should do before 21 September

Map live and pipeline brownfield projects against current LRR claims: which costs are revenue vs capital, which sites fail the derelict-land date test, and where relief cash flow arrives only on disposal.

If timing reform would change project viability models, prepare a short evidence response with cost examples — HM Treasury especially wants developer and local-authority input. Diary Budget 2026 for the policy decision; do not assume draft Finance Bill clauses yet.

Keep remediation invoices, planning conditions, and environmental reports exportable. Whether or not statute changes, organised packs speed adviser review of any LRR claim you already make under today’s rules.

How FinnAccountings helps with CT and project packs

Clean project and supplier categories make remediation spend easier to review beside Corporation Tax estimates. FinnAccountings helps Ireland and UK businesses prepare bookkeeping and tax packs with Chartered Accountant insight before you or your ICAEW/ACCA or Chartered Accountant (Ireland) adviser files. Start a free trial for review-ready drafts — we prepare records; we do not file Corporation Tax returns or claim LRR on your behalf.

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Related reading

For the full Legislation Day package that introduced this consultation alongside other draft measures, read the Finance Bill 2026-27 overview.

UK Finance Bill 2026-27 Legislation Day overview →

Employers watching the longer NIC recovery consultation have until 12 October 2026.

HMRC NICs recovery time limits: consultation to 12 October →

Use the dual-market tax calculator for high-level Corporation Tax planning estimates only — not an LRR computation.

Open free tax calculator (Ireland & UK) →