Is a Loft Conversion VAT Free in 2026? (UK)
No — a standard loft conversion on a UK home is not VAT-free in 2026. Full 20% VAT applies on labour and materials. The reduced 5% VAT rate only applies in specific cases: converting a property to change the number of dwellings (e.g. house into flats), or renovating a home that has been empty for at least 2 years. A normal loft conversion that adds a bedroom and ensuite to your existing home is standard-rated.
When the standard 20% VAT rate applies
The default position from HMRC is that improvements and extensions to existing dwellings are standard-rated at 20% VAT. A typical Velux, dormer, hip-to-gable or mansard loft conversion that adds bedrooms or a bathroom to an occupied home falls into this category. The builder must add 20% on labour and materials (unless they are not VAT-registered — only relevant for smaller traders under the £90,000 threshold).
When the reduced 5% VAT rate applies
HMRC Notice 708 sets out the cases where reduced-rate 5% VAT can apply to a loft conversion:
- Changed-number-of-dwellings conversion — e.g. converting a single house into multiple flats, or a flat into a house, where the loft works are part of that scheme.
- Empty home conversion — if the property has been continuously empty for 2 years or more before work starts, all qualifying construction services are at 5%.
- Mobility adaptations for a disabled occupant — specific qualifying works can be zero-rated.
What does NOT qualify
Adding a bedroom to your own occupied home, even if it transforms a derelict loft, does not qualify on its own. Splitting bills between standard- and reduced-rate works on the same property (e.g. 5% on the empty-home portion, 20% on the post-occupation extras) is allowed but rare and needs an experienced builder.
How to check your VAT position
1. Check the property type
Single-house loft conversions to an occupied home: standard rate. Conversion that changes dwelling count: reduced rate.
2. Check the empty-home rule
If the home was unoccupied for 2 years before work begins, the 5% rate can apply — ask the council for written confirmation.
3. Get the builder's VAT position in writing
Before signing, ask the builder for written confirmation of the VAT rate they will charge with reference to HMRC Notice 708.
4. Ask an accountant if in doubt
For change-of-dwelling schemes or self-build, a qualified accountant can advise on reclaim and zero-rated supplies.
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