Property Reliefs
Structures and Buildings Allowance
Structures and Buildings Allowance (SBA) is a UK capital allowance introduced by HM Revenue and Customs (HMRC) in 2018 to provide tax relief for qualifying construction and renovation costs incurred on non-residential structures and buildings. Specifically, SBA enables commercial property owners and tenants with a relevant interest in land to write off capital expenditure on structures and buildings that do not qualify for traditional Plant and Machinery Allowances. The relief is typically claimed on a straight-line basis at an annual rate of 3% (originally 2%, increased in April 2020) of the original qualifying expenditure over a period of approximately 33 and one-third years. Governed by the Capital Allowances Act 2001, SBA requires detailed chronological cost records and legal documentation to substantiate the base cost and ownership history throughout the entire relief period.
Why it matters
Structures and Buildings Allowance matters because it fills a long-standing historical tax gap where commercial buildings, such as retail outlets, offices, warehouses, and factories, received no tax relief for standard structural construction or conversion costs. Before the introduction of SBA, commercial property investors could only claim tax relief on embedded plant and machinery, leaving the core structural costs entirely out of tax computations unless industrial buildings allowances applied. According to HM Treasury policy papers, SBA encourages long-term capital investment in commercial infrastructure, stimulating regional regeneration and modernizing the UK's commercial property stock. However, claiming SBA requires meticulous record-keeping through an SBA statement, because any unadjusted disposal values or failure to factor allowances into capital gains tax computations can lead to clawbacks or restricted loss reliefs upon the sale of the asset. Property investors who overlook SBA routinely forfeit thousands of pounds in cumulative tax deductions over the multi-decade writing-down period.
The common misconception
Misconception: Structures and Buildings Allowance can be claimed on the purchase price of land. Reality: Land does not depreciate for tax purposes, so land acquisition costs and legal fees directly related to land purchase are explicitly excluded from qualifying SBA expenditure. Misconception: SBA writing-down allowances can be accelerated or pooled together with plant and machinery allowances. Reality: SBA operates as a distinct relief tracked via a mandatory standalone statement and cannot be pooled or accelerated through Full Expensing or the Annual Investment Allowance. Misconception: Selling a building extinguishes all prior SBA claims without tax consequences. Reality: Claiming SBA reduces the base cost of the property for Capital Gains Tax (CGT) purposes, meaning historical allowances claimed are added back to the disposal proceeds calculation.
A worked example
Consider a commercial logistics company that constructs a new distribution warehouse in the UK for a total structural construction cost of £2,000,000, excluding land value. The company incurs this expenditure after April 2020, qualifying for the enhanced 3% annual straight-line SBA rate. Each financial year, the business can claim 3% of the £2,000,000 base cost, resulting in an annual tax deduction of £60,000 against its corporation tax liability. Over the standard 33.3-year claim period, this delivers a total cumulative tax relief of £2,000,000. If the company sells the warehouse after 10 years for £2,500,000, having claimed £600,000 in cumulative SBA, the original base cost for Capital Gains Tax calculations is reduced by the £600,000 of allowances claimed. Consequently, proper tracking via the required SBA statement ensures compliance with HMRC guidelines while maximising cash flow during the operational lifespan of the commercial asset.
Source: www.gov.uk