Online agent Doorsteps has hinted that it could expand into America, and that it could float on the stock market.

The business, founded by Akshay Ruparelia when he was still a teenager, is currently fund-raising on Crowdcube.

Answering questions on the site, Ruparelia says: “We have been approached by several international bodies for international expansion, though we see the best opportunity here in the UK – by focusing on what we are doing best.

“Though, having said that, should we raise enough funds in this round (or following rounds, if applicable) – we have lined up trustworthy family members and experienced partners in California, to assist with foreign expansion.”

Ruparelia, still only 20, justifies the current £18m valuation of his 18-month-old business by saying that it is now listing 2,100 properties and that it is a business “due to grow exponentially in the next three years”.

It plans to “significantly” increase revenues next year and onwards from the sales of services such as mortgages, conveyancing and surveying.

Of the possibility of an IPO, he says: “We have discussed the prospects of listing with some AIM brokers also – and see this as a possibility.”

By yesterday evening Doorsteps had raised £657,130 from almost 400 investors – way over its target of £400,000.

It still has 19 days left on its fundraising campaign.