Land Remediation Relief: A Plain-English Guide for Developers and Investors (2026/27)

Land Remediation Relief is one of the most generous corporation tax reliefs available to UK property companies, and one of the most widely missed. If your company has spent money removing asbestos, cleaning up contaminated soil, dealing with Japanese knotweed, demolishing buried structures or bringing a long-abandoned site back into use, there is a strong chance some of that spend qualifies for a 150 per cent deduction. On a £400,000 cleanup that is a £600,000 deduction, worth £150,000 in corporation tax at the 25 per cent main rate, or £96,000 as a cash payment if your company is loss-making.

This guide is written for the developer, investor or business owner who has heard the term and wants a straight answer to a simple question: do I have a claim, and what is it worth? It covers who can claim, what counts as contamination and dereliction, how the relief is calculated, the polluter-pays rule that catches people out, how it stacks alongside capital allowances, whether it is being abolished, and how a claim is actually made. Where the statute gets technical, we summarise and point you to our companion page.

What Land Remediation Relief is, in one paragraph

Land Remediation Relief lets a UK company deduct 150 per cent of what it spends cleaning up contaminated or long-derelict land when working out its taxable profit. In plain terms, for every £100 of qualifying cleanup cost, the company gets to knock £150 off its profits. Because corporation tax on those profits is charged at up to 25 per cent, the relief turns a cost into a meaningful tax saving. And if the company is making a loss, it does not lose the benefit: it can hand the relief back to HMRC in exchange for a cash payment. The relief lives in Corporation Tax Act 2009 Part 14 and has been part of the tax system, in one form or another, since it was introduced by Finance Act 2001. HMRC's own guidance sits in the Corporate Intangibles Research and Development Manual from CIRD60000 onwards.

Who can claim Land Remediation Relief

This is the first and most important filter, and it stops a lot of otherwise good claims dead: the relief is for companies only. To claim, you have to be within the charge to corporation tax. In practice that means one of two things:

• A limited company developer carrying on a trade that involves the land, for example an SPV building out a brownfield residential or commercial scheme.
• A limited company property investor running a UK property business, for example a company acquiring a contaminated or derelict property to refurbish and let.

Everyone else is excluded. Sole traders, ordinary partnerships, LLPs and trusts cannot claim, no matter how contaminated the site or how large the cleanup bill. This is not an oversight, it is by design: the relief sits inside the corporation tax code and was calibrated for the corporate ownership structures that dominate brownfield regeneration.

The practical consequence is that ownership structure matters enormously. A developer who buys a contaminated site personally, cleans it up and then wonders about the relief has already lost it. Where a large cleanup is coming and the land is held personally, the standard planning move is to incorporate before the qualifying expenditure is incurred, so the spend falls inside a company. That decision carries its own tax consequences (stamp duty land tax, capital gains on incorporation, evidencing beneficial ownership) and needs to be made deliberately and early, not retrofitted after the diggers have left.

Within the corporate world, it does not matter whether the company holds the land as trading stock or as an investment. The developer route treats the company as carrying on a trade involving the land, so the remediation cost feeds into the trading computation. The investor route treats the company as running a UK property business, so the cost feeds into the property business computation. Both qualify. What matters is that the qualifying activity is a corporate one and that the company, rather than an individual behind it, actually incurs and bears the expenditure. A company that has cleanup work done and paid for by a connected individual, or reimbursed by a grant covering the same cost, will find the qualifying amount reduced or removed, so the contracting and payment trail needs to sit cleanly inside the claimant company.

What counts as contamination and dereliction

The relief has two routes in: land can qualify because it is contaminated, or because it is long-derelict. They are tested differently.

Contaminated land

Land is contaminated where something in, on or under it is causing harm, or where there is a serious possibility of harm, because of substances present. The harm can be to human health, to buildings, or to the wider environment such as watercourses and ecosystems. The contamination has to come from substances rather than from natural features of the geology. Common qualifying contaminants include:

• Asbestos in the ground or in the fabric of structures being remediated
• Hydrocarbons and fuel contamination, typical of former petrol stations, depots and industrial sites
• Heavy metals and chemical residues from former manufacturing use
• Buried tanks, foundations and other structures left by a previous occupier
• Japanese knotweed and certain other invasive plant contamination
• Landfill gas such as methane requiring active management

Derelict land

The derelict route is for land that is not in productive use and cannot be brought back into use without removing buildings or structures. Crucially, there is a date gateway: the land must have been derelict throughout the period starting from the earlier of 1 April 1998 or the date your company (or a connected person) first acquired an interest in it. So a site that has stood abandoned since the mid-1990s and was bought last year qualifies, but a site that only fell derelict in 2012 does not, because its dereliction does not reach back far enough. The gateway is there to channel the relief towards genuine long-term regeneration rather than recently vacated buildings. Evidencing the period of dereliction, through planning records, council tax exemptions, valuation entries and historical imagery, is a core part of a derelict-land claim.

It is worth being clear about the difference in feel between the two routes. The contamination route is substance-led: the question is whether harmful material is present and whether removing it qualifies, and there is no date gateway to satisfy. The derelict route is time-led: the substances may not matter at all, but the long, unbroken period of dereliction back to the gateway date is everything, and a single spell of interim use can break the chain and defeat the claim. Many real sites qualify on both routes at once (a long-abandoned former industrial site that is both derelict and contaminated), and where that is so, the contamination route is often the cleaner one to rely on because it sidesteps the date-history evidence burden entirely.

How much Land Remediation Relief is worth

The headline is a 150 per cent deduction. That figure is built from a standard deduction under section 1147 (which treats the cleanup cost as an ordinary deductible expense, the first 100 per cent) plus an additional 50 per cent deduction on top. Loss-making companies can instead surrender the relief for a payable cash credit worth 16 per cent of the qualifying land remediation loss, a rate fixed by section 1154. We keep the statutory derivation brief here on purpose. The section-by-section walk-through of how the standard deduction, the additional deduction and the payable credit fit together lives on our full mechanics page, linked below, so that this guide can stay readable.

The easiest way to see the value is with a worked example. Take a brownfield developer SPV that spends £400,000 removing asbestos and excavating hydrocarbon-contaminated soil on a site it bought from a previous industrial owner.

Scenario	Profit-making developer SPV	Loss-making investor company
Qualifying cleanup spend	£400,000	£400,000
Deduction at 150%	£600,000	£600,000
Benefit route	Reduces taxable profit	Surrendered for cash credit
Rate applied	25% corporation tax	16% payable credit
Benefit	£150,000 tax saved	£96,000 cash from HMRC

The profit-making SPV knocks £600,000 off its taxable profit and, at the 25 per cent main rate, saves £150,000 in corporation tax. The loss-making investor company cannot use a deduction it has no profit to set against, so instead it surrenders the £600,000 loss and receives 16 per cent of it, £96,000, as an actual cash payment. Either way, a £400,000 cost has generated a six-figure benefit. Note that these are deliberately round illustrative figures; a real claim depends on how much of the £400,000 is genuinely qualifying, which is exactly what a specialist survey establishes.

One subtlety on the profit-making side is worth flagging, because it can make the relief slightly more valuable than the headline suggests. In 2026/27 the 25 per cent main rate applies to companies with profits above £250,000, while profits below £50,000 are charged at the 19 per cent small profits rate. Between those two thresholds, marginal relief applies, and the effective rate on the slice of profit in that band is 26.5 per cent. If your remediation deduction reduces profit that would otherwise have sat in the marginal band, each pound of deduction can be worth 26.5 pence rather than 25 pence. It is a second-order point, but on a large claim it moves the number, and it is a reason to think about the timing of the deduction against the company's profit profile for the year.

The loss-making cash-credit route deserves emphasis because it is what makes the relief unusual. Most tax reliefs are only useful to a company that is already paying tax. A brand-new developer SPV in its first, loss-making phase of a scheme, or an investor company with heavy finance costs, may have no corporation tax bill to reduce. The 16 per cent payable credit converts the relief into working capital at exactly the point in a project when cash is tightest. For that reason, the loss-making route is often the more strategically important of the two, even though the headline saving looks smaller than the profit-making figure.

The polluter-pays exclusion, in plain terms

There is one rule that denies more claims than any other, and it is worth understanding before you get your hopes up. The relief is not available where the contamination or dereliction was caused, wholly or partly, by your company or by anyone connected with your company. This is the polluter-pays exclusion at section 1150, and the logic is simple: the state will help you clean up someone else's mess, but it will not subsidise you for cleaning up your own.

Two features make this rule sharper than it first appears. First, even partial responsibility is enough to lose the relief entirely. Second, "connected persons" is defined widely, covering group companies, subsidiaries, fellow group members, directors and their families, and controlling shareholders. So a company cannot sidestep the rule by having a sister company do the contaminating.

The upshot is that the typical successful claimant is a company that bought a site already contaminated or derelict by a previous, unconnected owner. Demonstrating that is a documentation exercise: the claim file should show the chain of ownership, a site investigation report attributing the contamination to a prior use, and declarations from directors and shareholders confirming that nobody connected with the company was responsible. Get this evidence contemporaneously; reconstructing it after HMRC opens an enquiry is much harder.

Qualifying versus non-qualifying expenditure

Not everything spent on a brownfield project qualifies. The relief attaches specifically to the cost of removing or treating the contamination or dereliction, not to the general cost of building. The line matters because a contractor's invoice for groundworks usually bundles both. A specialist separates them. The broad picture looks like this:

Typically qualifying	Typically not qualifying
Removing or treating asbestos	General construction of the new building
Excavating and disposing of contaminated soil	Ordinary landscaping and planting
Removing hydrocarbons, heavy metals and chemical residues	Costs relating to contamination you caused
Treating Japanese knotweed and invasive contamination	Land acquisition cost itself
Removing buried tanks, foundations and structures (derelict route)	Professional fees unrelated to the remediation
Gas management for landfill methane	Expenditure subsidised by a grant covering the same cost

A common error is treating a whole remediation-and-build contract as one qualifying figure, or conversely writing the claim off because the invoices do not separate the cleanup element. The right approach is an apportionment by someone who understands both the tax boundary and the construction detail, which is why these claims are usually surveyor-led.

One point that trips companies up is the interaction with grants and subsidies. Brownfield remediation often attracts public funding, and where a grant specifically covers the cost of the qualifying remediation, that cost is not also relievable, because the company has not truly borne it. The relief follows the net cost the company itself carries. This is not a reason to avoid grants, which are usually worth more than the tax relief on the same pound, but it is a reason to map which pounds are grant-funded and which are self-funded before the claim is prepared, so that the qualifying figure is right first time and does not unravel on enquiry.

Where LRR sits next to capital allowances and SBA on a brownfield scheme

Land Remediation Relief rarely stands alone. On a typical brownfield development it is one of three reliefs working on different slices of the same project spend, and claiming one does not stop you claiming the others. Understanding the stack is where the real value is unlocked.

• Land Remediation Relief applies to the cost of cleaning up the contamination or dereliction, at 150 per cent.
• Capital allowances apply to the plant, machinery and integral features installed in the finished building, once it is fitted out. These are the embedded fixtures inside the fabric of a commercial building, and a large second-hand or newly fitted building can carry a substantial unclaimed pool.
• The structures and buildings allowance applies to the cost of constructing the new non-residential structure itself, at 3 per cent a year straight-line.

The three reliefs run on separate expenditure streams and stack cleanly when the invoicing is properly apportioned. The same pound is never relieved twice, but a well-structured brownfield scheme claims the remediation relief on the soil cleanup, the capital allowances on the fixtures, and the structures and buildings allowance on the shell. To go deeper on the two capital-allowances streams, see our guides to embedded capital allowances on commercial property and the structures and buildings allowance. For the plant side, our capital allowances calculator gives a quick indicative figure by building type.

Is Land Remediation Relief being abolished?

This question comes up often enough that it deserves a direct answer: no, the relief is not being abolished, and it remains fully in force for 2026/27. There is no enacted legislation removing it.

The confusion has a source. Land Remediation Relief has been reviewed periodically as part of the government's broader look at property, environmental and capital tax reliefs, and various bodies have argued both for its expansion and, occasionally, for its reform or withdrawal on value-for-money grounds. Those reviews generate headlines suggesting the relief is under threat. But a review is not an abolition, and as things stand the 150 per cent deduction and the 16 per cent loss-maker credit both continue to apply exactly as described in this guide.

The sensible posture is this: the relief is live and claimable now, so if you have qualifying expenditure within the claim window, claim it. Reliefs can and do change at fiscal events, so for a very large scheme it is worth confirming the current position at the point you rely on it. But do not let the "is it being abolished" noise stop you from claiming a relief that is, today, available.

How a claim is made and evidenced

A Land Remediation Relief claim is made inside the company's corporation tax return (the CT600) for the accounting period in which the qualifying expenditure was incurred. It is not a separate application to a special unit; it is a computation and a set of supporting figures within the normal return. There are two timing points that matter:

• The claim window. The claim, or an amendment to include it, must generally be made within two years of the end of the accounting period to which it relates. That is tighter than many owners assume, and expenditure from three or four years ago may already be out of time. If you suspect a missed claim on a recent scheme, check the dates quickly.
• The loss-surrender election. Where a loss-making company wants the cash credit rather than carrying the loss forward, that surrender is elected for as part of the return.

The claim stands or falls on its evidence. A robust file typically contains five things: a site investigation report from a competent environmental consultant identifying and characterising the contamination or dereliction; a remediation specification with itemised costs, prepared by a quantity surveyor, separating the qualifying spend from the rest; connected-persons declarations from directors and shareholders to satisfy the polluter-pays rule; title and ownership history showing when the company acquired its interest; and, for derelict-land claims, historical evidence that the site was derelict back to the gateway date. Assembling this while the work is happening is far easier than reconstructing it later.

None of this needs to feel daunting. On most schemes the environmental report and the quantity surveyor's cost breakdown already exist for construction and lending reasons, so the claim reuses documents the project has produced anyway. The specialist's job is to reframe that existing evidence into the shape HMRC expects, add the connected-persons and ownership layer, and stand behind the figures if an enquiry follows. The single biggest determinant of a smooth claim is simply that the evidence was captured contemporaneously rather than assembled from memory after the fact.

For the full statutory anatomy of the claim, including the exact deduction stack, the payable-credit calculation and the enquiry-defence detail, see our companion page, Land Remediation Relief: the 150% corporation tax deduction mechanics. That page is the statute walk-through; this one is the plain-English hub.

When to bring in a specialist, and what a review costs you

Land Remediation Relief is a specialist relief and it is easy to get wrong in both directions: to miss a valid claim, or to overclaim non-qualifying expenditure and invite an enquiry. The people who do this work well are surveyor-led specialist firms who understand both the construction detail and the tax boundary. They are the same firms that handle embedded capital allowances claims, so a single specialist can often assess the remediation relief and the fixtures claim on the same building at once.

The economics are usually in your favour. Most specialist firms carry out an initial feasibility review at no cost and no obligation: they look at the site, the spend, the contamination or dereliction and the ownership structure, and tell you whether a viable claim exists and roughly what it is worth before you commit anything. Where a claim proceeds, fees are typically contingent, a percentage of the tax saved or cash credit received, so there is normally nothing to pay unless the claim succeeds. Always confirm the fee basis in writing before you instruct.

You should get a review looked at if any of the following apply: your company has spent money removing asbestos, contaminated soil, knotweed or buried structures; you have bought a former industrial, commercial or petrol-station site; you have brought a long-abandoned property back into use; or you are partway through a brownfield development and want to make sure the remediation, capital allowances and structures and buildings allowance are all being captured. Because the claim window is only two years, the cost of waiting is that the relief can quietly expire.

Land Remediation Relief remains one of the best-value corporation tax reliefs in UK property, and one of the most underclaimed, precisely because it is narrow, procedural and easy to overlook on a busy development. If your company has cleaned up a site it did not contaminate, the odds are good that a slice of that spend is worth 150 per cent to you, in tax saved or cash received. The only way to know is to have the expenditure looked at while the claim window is still open.