VAT on home renovation work is one of the most misunderstood areas of UK construction finance. Many homeowners assume all building work carries 20% VAT — but the reality is more nuanced, and knowing the rules can save you thousands of pounds on a larger project.
There are three rates that can apply to building and renovation work: 20% (standard), 5% (reduced), and 0% (zero rated). Which applies depends on the type of work, the current use of the property, and how long it has been empty. Self-builders also have access to the HMRC DIY Housebuilder Scheme, which allows VAT paid on materials to be reclaimed after completion.
The Three VAT Rates for Building Work
20% Standard Rate
The standard 20% VAT rate applies to most renovation, repair, and improvement work on existing residential properties. This includes:
- Loft conversions on occupied homes
- Extensions to occupied homes
- Kitchen and bathroom renovations
- Rewiring and re-plumbing of occupied properties
- Decorating, plastering, and general maintenance
- Landscaping and external works
If your builder is VAT-registered (required if turnover exceeds £90,000 in 2026), they will add 20% VAT to their labour and materials. Sole traders or small contractors below the threshold do not charge VAT — this can be an advantage on smaller jobs, though it limits recourse if things go wrong.
5% Reduced Rate
The 5% reduced rate is a significant saving and applies to:
Residential conversions: changing the number of dwelling units in a building — for example, converting a house into flats, or a commercial building into residential. This applies to both the construction and professional services directly related to the conversion.
Empty property renovation: if a property has been empty for two or more years, renovation work can qualify for 5% VAT. The property must have been previously lived in (not a new-build), and the contractor must obtain evidence of the period of vacancy before applying the reduced rate. This typically means a Council Tax exemption letter, electoral roll history, or a utility disconnection certificate.
Properties empty for 10+ years: renovation of a property empty for a decade or more can qualify for the zero rate (0% VAT) on materials and labour for the first renovation that brings it back into use.
Mobility aids: installation of certain goods for disabled people (grab rails, stairlifts, wet rooms) is zero rated in some circumstances — see HMRC Notice 701/7.
| Work Type | VAT Rate |
|---|---|
| Renovation of occupied home | 20% |
| Extension on occupied home | 20% |
| Conversion (changing dwelling count) | 5% |
| Renovation of property empty 2+ years | 5% |
| Renovation of property empty 10+ years | 0% |
| New-build residential (to first occupier) | 0% |
| Energy-saving materials installation | 0% (from Feb 2024) |
Zero Rate (0%)
Zero-rated construction work means VAT is charged at 0% — the builder still shows VAT on the invoice, but at nil. You don’t pay it, but the builder can reclaim their input VAT on materials. Zero-rated scenarios include:
- New-build residential properties (from foundations to handover)
- The first renovation of a property empty for 10 years or more
- Certain extensions that create a new dwelling
Zero rate does not apply to extensions, loft conversions, or renovations of occupied homes — a common misconception.
Energy-Saving Materials: A Significant Change
From February 2024, HMRC extended the 0% VAT relief for energy-saving materials (ESM) to a wider range of installations, and removed the previous requirement for the home to meet an income threshold. The zero rate now applies to:
- Solar panels (PV and thermal)
- Wind turbines
- Ground and air source heat pumps
- Insulation (wall, floor, loft, roof)
- Double and triple glazing (where it’s the primary installation, not a repair)
- Battery storage connected to eligible ESMs
This is a meaningful saving — a £8,000 heat pump installation saves £1,600 in VAT, and an insulation project costing £3,000 saves £600.
The DIY Housebuilder VAT Reclaim Scheme
Self-builders and converters who are not VAT-registered can reclaim VAT paid on materials through the HMRC DIY Housebuilder Scheme. This is one of the most valuable but under-used reliefs available to UK homeowners.
Who qualifies:
- People building a new home for their own use (not for sale)
- People converting a non-residential building into a dwelling
- People converting a building that previously contained more dwellings than it does now (e.g., an HMO back to a single house)
What you can reclaim:
You can reclaim VAT on eligible building materials — goods that are “ordinarily incorporated” into the building (bricks, timber, insulation, windows, doors, kitchen units fixed to the wall, bathroom suites). You cannot reclaim VAT on:
- Professional fees (architects, structural engineers, surveyors)
- Plant hire
- Consumables (sandpaper, fixings, adhesives)
- Fitted furniture that is not incorporated into the fabric of the building
How to claim:
You submit VAT431NB (new build) or VAT431C (conversion) to HMRC, attaching:
- All VAT receipts and invoices
- The Completion Certificate issued by Building Control
- Evidence of planning permission and any other relevant consents
The claim must be submitted within three months of the Completion Certificate date. HMRC typically processes claims within 30 working days.
How much can you reclaim?
On a typical self-build, materials represent 40–60% of the total project cost. On a £300,000 build where £150,000 is materials, the VAT reclaim could be up to £30,000. Even on smaller conversions, it is common to reclaim £5,000–£15,000.
Keeping Records for a VAT Reclaim
Good record-keeping from day one is essential. You cannot reconstruct receipts later if suppliers have gone out of business or closed accounts. HMRC tips:
- Keep all original VAT receipts — photocopies and PDFs are acceptable, but originals are preferred
- Ensure each receipt shows the supplier’s VAT registration number, a description of goods, the amount of VAT charged, and the date
- Create a spreadsheet tracking date, supplier, description, net amount, VAT amount, and receipt number
- Store digitally as well as physically in case of loss
Common Pitfalls
Assuming your contractor knows the correct rate. Contractors sometimes charge 20% when 5% applies (for example, on a long-vacant property). You are entitled to question this — the contractor must assess the rate correctly and the burden of proof lies with them. Ask them to confirm which rate they are applying and why.
Missing the three-month window. HMRC is strict about the DIY reclaim deadline. Do not wait until the Completion Certificate arrives to start organising receipts.
Including ineligible items. HMRC audits DIY claims. Including professional fees, furniture, or consumables will not simply be rejected — it can result in HMRC questioning the whole claim. Be conservative and check HMRC Notice 708 for the definitive list of eligible materials.
Builder below VAT threshold. If you use an unregistered contractor, they cannot supply a VAT invoice for labour, and there is no VAT to reclaim on labour in any case. However, you can still reclaim VAT on materials you purchase directly.
Getting Advice
For projects where VAT savings are material — conversions, new builds, long-vacant properties — a one-hour consultation with a VAT specialist (typically £150–£300) is almost always worthwhile. HMRC’s own helpline (0300 200 3700) can also provide written guidance on specific project scenarios, which provides a useful paper trail if the rate is later questioned.
