A firm that aims to provide funds to would-be borrowers in exchange for a stake in any house price appreciation is set to launch in the UK.

Already a popular method of purchasing a house in parts of the United States, the model would see the firm, Boost Your Deposit, double any deposit saved (capped to 15 per cent of the purchase price) and take some of the resell value instead of interest payments.

Boost Your Deposit gives an example of providing a further 10 per cent on top of 10 per cent saved in exchange for 25 per cent of any gain.

Therefore, somebody who has saved £20,000 for a £200,000 house would borrow a further £20,000 to make a 20 per cent deposit and, if the house sold for £240,000 later on down the line, the homeowner would owe Boost your Deposit £20,000 plus 25 per cent of the £40,000 appreciation – £30,000 in total.

It says that this is a dynamic calculation – houses that are anticipated to rise in value more quickly may, for example, require the firm taking 23 per cent the gain instead.

The firm says that borrowers would be able to buy our its interest in the house at any time, using a valuation to work out any gains or losses.

It is currently seeking regulatory approval.