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Self BuildersConversion VATWhat Can I Claim on VAT431C?
Conversion VAT — HMRC Notice 708

What Can I Claim on VAT431C?

On a VAT431C claim you can reclaim: the 5% VAT on contractor building services, and the 20% VAT on building materials you purchased directly and incorporated into the structure. You cannot reclaim VAT on professional fees (architect, surveyor, engineer), fitted carpets, white goods, furniture, tools, or any materials not fixed to the building. The distinction between 'building materials' and 'fittings or furnishings' is where most VAT431C claims lose money.

£3,000–£8,000

Why this matters

That is a typical amount lost by VAT431C claimants who either over-claim (including ineligible items, risking HMRC rejection) or under-claim (missing eligible material purchases that were not carefully tracked).

The key distinctions

Claimable — contractor building services at 5%

All contractor services on the conversion: groundworks, structural, roofing, glazing, plumbing, electrical, plastering, joinery, decoration. The 5% VAT on these is reclaimable.

Claimable — building materials purchased directly

Bricks, blocks, timber, insulation, roofing materials, pipework, cable, plasterboard, tiles (floor and wall), sanitaryware, doors, windows — materials incorporated into the fabric of the building. The 20% VAT on these is reclaimable.

Not claimable — professional fees

Architect fees, structural engineer fees, planning consultant fees, quantity surveyor fees, party wall surveyor fees. These are standard-rated services that are not within the scope of the VAT431C scheme.

Not claimable — fitted carpets and floor coverings

HMRC specifically excludes fitted carpets and most floor coverings from the DIY scheme, even though they are 'fitted'. Hard floor tiles are claimable — carpets are not.

Practical checklist

  • Separate every invoice into 'contractor services', 'direct materials', 'professional fees' and 'fittings'
  • Check that all claimed materials are 'incorporated into the building' — not free-standing or removable
  • Do not include architect, surveyor or planning fees in your claim
  • Do not include fitted carpets — but do include hard floor tiles
  • Include sanitaryware (toilets, basins, baths) — these are claimable
  • Include light fittings and switches, but not the light bulbs or portable lamps
  • Keep all merchant receipts showing VAT amounts separately stated
  • Where a contractor invoice mixes claimable and non-claimable items, include only the claimable portion

HMRC notice references

HMRC Notice 708 Section 7Eligible goods and services
HMRC Notice 708 Appendix BBuilding materials — definition

VATBuild is not affiliated with HMRC. References to HMRC publications are for informational purposes. Always consult a qualified tax adviser before submitting a reclaim.

How VATBuild helps

What VATBuild checks for this situation

VATBuild applies HMRC's full definition of eligible items when reviewing your invoices. It separates claimable line items from excluded ones on every invoice — flagging professional fees, carpets, white goods and furniture for exclusion, and identifying which material purchases are eligible for inclusion in your VAT431C claim.