Homeowners can often be encouraged to pay cash and be left exposed without a receipt. Although it isn’t a crime to pay a builder in cash, homeowners are acting illegally if they know this is to avoid VAT. There is also a huge risk in not getting a receipt, as they have no proof that a builder, carpenter or electrician has done the work, and therefore no guarantee that if things go wrong they will come back to put things right.

Housebuilding companies do not pay any VAT when they build new homes and only a reduced rate of 5% for converting buildings into new dwellings. The Government justifies this on the grounds that we need to encourage housebuilding to overcome the housing shortage. We believe that building work done by homeowners that increases the living space of a home, for instance by converting the loft, should be treated the same as building a new home.

Although homeowners are eligible to pay reduced VAT for some improvements (eg energy efficiency or necessary adaptions for someone with mobility issues) the way the system is administered is overly complicated and confusing. This results in people not claiming their rightful reductions. For example, homeowners can pay 5% VAT on installing controls for heating systems and insulation, but not for installing the system itself (unless you are over 60 or on a low income). The scheme is so complicated that we hear of many builders not offering it to their customers because they fear they will be liable for the tax if they get it wrong.

Cutting VAT on home improvements to 5% could give at least a £15 billion boost to our economy, creating thousands of jobs, according to the Federation of Master Builders. This would boost the demand for renovations, which would benefit the construction industry.

Alex Depledge, CEO of Resi.co.uk, says:

"Buying a home is the largest purchase most people will make and renovations are often their second largest lifetime spend. And if you’re spending £100,000, which is an extraordinary amount of money to save up – or take out on top of your mortgage – and then have VAT slapped on top of it, it can become impossible.

"But VAT on building work doesn’t just affect consumers. Builders are also affected. For smaller operations, working below the VAT threshold, it can become extremely difficult not to succumb to the temptation to take some aspects of a project off the books."