Mixed-Use vs Residential SDLT Comparison
A property with both residential and non-residential elements (e.g., flat above a shop, farm with farmhouse) may qualify as mixed-use, attracting the lower non-residential SDLT rates instead of residential rates plus the 3% surcharge.
Frequently Asked Questions
What is a mixed-use property for SDLT?
A mixed-use property has both residential and non-residential elements — for example, a flat above a shop, a farm with a farmhouse, or a property with a separately let commercial unit. SDLT is charged at non-residential rates on the whole price.
Why are mixed-use SDLT rates lower?
Non-residential SDLT rates (0%/2%/5%) are lower than residential rates (0%/2%/5%/10%/12%) and do not include the 3% additional dwelling surcharge. For high-value properties, the saving can be tens of thousands of pounds.
Has HMRC challenged mixed-use SDLT claims?
Yes, extensively. HMRC disputes many mixed-use SDLT claims and has won several tribunal cases. Key issues include: whether the non-residential part is genuinely functional, whether a paddock or land counts as non-residential, and whether agricultural land attached to a house is incidental.
Does a garden or paddock make a property mixed-use?
Not automatically. HMRC generally views gardens and paddocks as residential land unless they are actively used for non-residential commercial purposes (e.g., grazing livestock as part of a farming business). A purely ornamental paddock would not qualify.
What is the SDLT non-residential rate structure in 2025/26?
Non-residential SDLT: 0% on the first £150,000; 2% on £150,001–£250,000; 5% on amounts over £250,000. These rates apply to the whole purchase price regardless of the residential/commercial split.
Is there a time limit to amend an SDLT return for mixed-use?
SDLT returns can be amended within 12 months of the filing date (14 days after completion). However, HMRC has 4 years to enquire into returns, and can recover tax if a mixed-use claim was incorrect.
Does the 3% SDLT surcharge apply to mixed-use?
No. The 3% additional dwelling surcharge only applies to purely residential purchases. Mixed-use properties do not attract the 3% surcharge, which is a major reason why the mixed-use classification can save significant money for buy-to-let investors.
What evidence supports a genuine mixed-use claim?
Planning permission showing commercial use, active commercial letting income, business rates being paid on the non-residential part, and a valuer's confirmation of the commercial element's functional independence all strengthen a mixed-use claim.
Does a home office count as mixed-use?
No. HMRC's position is that a room used as a home office within a residential property does not make it mixed-use for SDLT. The non-residential use must be distinct and structural — not incidental to residential occupation.
Can a new-build property be mixed-use?
Yes, if it is genuinely designed and used for both residential and commercial purposes. Purpose-built mixed-use developments (e.g., apartments above retail units) clearly qualify. Developer sales of mixed-use units are common in urban regeneration schemes.
How does mixed-use affect CGT and income tax?
Owning a mixed-use property can affect principal private residence relief (only the residential proportion qualifies), capital allowances (available on the commercial portion), and income tax on rental income. Each element is treated separately for these taxes.
What SDLT applies to a farm purchase?
A working farm (land and farmhouse together) is typically treated as mixed-use (agricultural land is non-residential). The farmhouse alone would be residential. HMRC's guidance confirms farms with working agricultural land qualify as mixed-use for SDLT.