MPs have expressed uncertainty over the value of the Help to Buy scheme in both its current and soon-to-be reformed version.

A report by the House of Commons committee of public accounts warns that while the scheme has helped buyers on to the property ladder, a “large proportion” did not require financial help.

The report said: “While Help to Buy has helped many people to buy properties who otherwise would not have been able to, a large proportion of those who took part did not need its help.

“By December 2018, the scheme had supported some 211,000 households to buy properties, through loans totalling £11.7bn.

“Some 37% of buyers said they could not have bought a property at all without the support of the scheme.

“This implies that around three-fifths of buyers did not need the support of the scheme to buy a property, although some research suggests that even those who could afford to buy were not doing so because of wider economic uncertainty.

“Around 20% of people who have used the scheme were not first-time buyers.”

The committee warns that the Government has allowed the scheme to be a “semi-permanent feature” of the housing market since its launch in 2013, highlighting that there are no plans to address a fall in supply when the scheme is due to end in 2023.

The report also questions reforms to the scheme. From 2021, the ministry will restrict the scheme to first-time buyers, and is introducing lower regional price caps that will reduce the number of purchases through the scheme and should better focus the scheme on those who most need help.

The report said: “Regional price caps could mean that the scheme may not work well in some areas within the regions.

“While the [ministry] has committed to monitoring the situation, having already set the caps, it seems unwilling to change them, creating a risk they may not work in the way intended.

“Despite this, the [ministry] has not assessed the likely impact of the changes to the scheme from 2021.”

There are also warnings that borrowers may be unaware of the extra interest charged on the equity loan after five years.

The Ministry of Housing, Communities and Local Government is urged to report back on the value and workings of the new scheme before it is launched.

Meg Hillier, chair of the committee, said: “Help to Buy has certainly increased the supply of new homes and boosted the bottom line of house builders.

“But it has also tied up a large sum of money, forecast to be nearly £29bn in cash terms by the time it concludes in 2023, making the value of what has been achieved uncertain.

“While many people have been helped to buy properties who would have not otherwise been able to, an even larger group of buyers did not need its financial support.

“Help to Buy, as the department acknowledged, only benefits those in a position to buy their own house in the first place. It does not help make homes more affordable nor address other pressing housing problems in the sector such as the planning system or homelessness”.

“The scheme exposes both the Government and consumers to significant financial risks were house prices or interest rates to change.

“Better consumer protection needs to be built into similar schemes in the future.”