A property portal which allows both private sellers and agents to list says that it is being approached by vendors whose agents are using OnTheMarket.

It also claims to having had approaches from OTM agents themselves, and that the ‘one other portal’ rule does not apply to it.

However, yesterday evening OTM said that it does consider the House Shop to be a competing portal. It said it did not wish to comment further.

The House Shop changed its name from the Little House Company two weeks ago, rebranding itself as a platform for private sales and both online and high street agents.

Partner Nick Marr said: “In recent weeks we have been approached by vendors whose agent is purely advertising with OnTheMarket.

“These vendors want to be proactive and in most cases they are able to list with us to top up their marketing.

“OTM estate agents have approached us as they seek more places to generate both vendor and buyer leads.

“We are not part of the ‘one other portal’ rule and we welcome OnTheMarket agents to The House Shop.

“The ethos is pro-consumer, pro-choice and is probably the exact opposite to newbie portal OnTheMarket.

“Online estate agents are part of the future and we intend to offer their listings and services to home owners who visit TheHouseShop, along with private sales, high street agency and auction.”

Marr said: “We intend to be a gateway to all the ways an individual can sell or let a home.

“Our visitors choose how they want to market their homes. We see working with online estate agents as an essential part of consumer choice.

“We look forward to working with online estate agencies who will benefit from our advertisers referrals and from the buyer enquiries we will generate for them.”

The original Little House Company launched in 2000 as a DIY sales portal.

The House Shop now says on its front page that it lists property for sale and rent “by estate agent and by owner”.