Stop leaving VAT
on the table

VATBuild automatically classifies your invoices, flags incorrect VAT charges, and builds a submission-ready HMRC claim — for new builds, conversions, and empty properties.

Free to get started · No card required

VAT431NB

Building a new home from scratch

Reclaim VAT on materials under the HMRC DIY Housebuilders scheme (VAT431NB). Typical savings of £15,000–£40,000.

VAT431C

Turning a non-residential building into a home

Barn, office, pub, or shop — convert to residential and reclaim VAT on your construction costs (VAT431C).

Reduced Rate

Bringing a vacant dwelling back to life

Properties empty for 2+ years may qualify for reduced-rate VAT on renovation work — saving up to 15% on eligible costs.

Your VAT health, at a glance

The VATBuild dashboard gives you a live picture of your claim — so nothing gets missed before you submit.

Example dashboard — your numbers will vary

£11,502

Potential Saving Identified

76%

VAT Review Readiness

Problems to Fix

142

Days Remaining

See exactly what to fix before you submit — missing documents, incorrect VAT invoices, and pending reviews all surfaced in one place.

Built around your project lifecycle

VATBuild guides you through every stage — from setting up before work begins to generating your HMRC report at the end.

Pre-Start

Know your position before you begin

Answer a short setup questionnaire
VATBuild assesses your VAT pathway against HMRC Notice 708
Get a list of claimable categories and rates upfront
Send contractors a VAT guidance letter before work starts

During Works

Process invoices as they arrive

Upload PDFs, photos, or scanned receipts
VATBuild extracts and classifies every line item instantly
Flag incorrect VAT charges before you pay
Draft supplier correction emails with one click

Project Completion

Submit with confidence

Live Claim Readiness score tells you what's missing
Generate a PDF, Excel, or CSV report for your accountant
Compliance audit checks for overclaiming risks
HMRC form fields pre-filled from your project data

Everything in one place

Every tool you need to build, check, and submit a defensible HMRC VAT reclaim — without the spreadsheet headache.

Invoice analysis

Upload PDFs, photos, Word docs, or Excel files. VATBuild reads every document, extracts each line item, and checks it against HMRC Notice 708 — automatically.

Supplier correction emails

When a contractor charges the wrong VAT rate, VATBuild flags it and drafts a professional correction request email pre-filled with the invoice details and the correct rate.

Claim Readiness score

A live score out of 100 tracks invoice quality, document completeness, photo evidence, and HMRC deadline — so you know exactly what to fix before submitting.

HMRC form pre-fill

VAT431NB and VAT431C form fields populated from your project data. Copy them straight to the HMRC form — no re-keying, no errors.

Compliance audit

Before you submit, VATBuild reviews every line item in your claim for overclaiming risks — with specific HMRC rule references for anything flagged.

Works on any device

Fully responsive — photograph and upload an invoice onsite from your phone, then review and generate reports from your desktop. No separate apps needed.

Built for the industry around every self-build

VATBuild works with the professionals and organisations that support self-build and conversion clients — not just the clients themselves.

Mortgage Lenders & Brokers

Support borrowers with a practical VAT control layer throughout staged drawdowns — from first advance to final HMRC reclaim.

Pre-Construction Professionals

Give clients a structured answer to their VAT questions — without taking on tax advice responsibilities yourself.

Planning Portals & Partners

Extend the post-permission journey into construction VAT control, with referral pathways for self-build and conversion applicants.

Learn more about industry partnerships

Simple, honest pricing

Start free. Upgrade when you're ready to export your claim.

Free

£0

Try it with one project

1 project
Invoice analysis
VAT Advisor chatbot

Self-Build

£350one-off

One project, full capability

1 project
Full claim reports (PDF, Excel, CSV)
Compliance audit
Supplier corrections

Ready to build your claim?

HMRC only allows one VAT431NB or VAT431C submission per project. VATBuild helps you get it right the first time.