Hi,
If you are renovating a property which has not been lived in for 10 or more years then you can complete a DIY application to recover VAT which you have been charged. You can see the guidance here:
Claim a VAT refund for a conversion if you're a DIY housebuilder
It is important that the builders completing the work charge you the correct level of VAT as the DIY Team will only repay the VAT which has been charged correctly. Please see the guidance below:
Reduced rating the renovation or alteration of empty residential premises
If a company just supply you with materials then they will need to charge you VAT at 20% and you can then use the above form to recover the 20% VAT.
If a contractor is providing work for you then they would need to charge you at the 5% rate of VAT based on the evidence which you can show them regarding the property being empty.
You will then use the above form to recover the 5% VAT charged.
Thank you.