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What is Enhancement expenditure?
Last verified 31 October 2026
Enhancement expenditure is spending that improves a property rather than just maintaining it, such as building an extension. It is not an expense against rent, but it can be deducted when you work out a capital gain.
Why it matters to landlords
GOV.UK does not use the phrase but says the costs of improvement works, such as an extension, can be deducted from a gain, while normal maintenance, such as decorating, does not count. For the rent side, HMRC says capital improvements or enhancements are not allowable, so the same invoice cannot do both jobs.
The line between repair and improvement matters. Replacing like with like is generally a repair deducted from rent. Adding something that was not there before is generally an improvement. Keep the invoices with the property file, because they may only be needed years later when you sell, and record them even though they do not reduce this year's profit.
Example
Hina bought a rental house for £150,000 and paid £18,000 for an extension. When she sells for £250,000 she can deduct the extension cost, so the gain before other costs is £82,000. The £18,000 never reduced her rental profit.
Allowable Expenses for Landlords (2026) →