An online agent has mounted a robust defence of the payment-upfront model.

It comes at a time when a number of online firms are turning to no sale, no fee, amid criticisms that a fee paid up-front means they need do no further work after taking the listing.

House Network has however said that the payment up-front model works best – for vendors.

House Network itself offers sellers a choice of a one-off payment upfront, a deferred payment model, and no sale, no fee.

The first two cost £795, with no sale, no fee costing from £995.

So far this year, most of House Network’s sellers (40.4%) have chosen no sale, no fee; almost 31% have opted for an upfront fee – which EYE found was actually on offer in our area for £700; and 29% have gone for deferred payment.

However, founder and CEO Mark Readings yesterday made clear his preference for being paid a fixed fee upfront.

He said: “We like to sell houses based on a one-off fee.

“There are many reasons for this.

“Over the last 15 years our research has shown that the first three weeks are the most important in selling a property.

“The one-off fee allows us to maximise the marketing of a house when it matters.

“If we do not sell within the first month then we keep marketing until the sale is achieved, so it is always in our interest to sell the property to the agreed price as quickly as we can. For the seller it is a win-win situation.”

Readings said that consumers should think carefully about signing a long-term contract with an agent, whether online or high street.

He said: “We know that most properties sell within the first three weeks, so it makes no-sense to sign-up with a single agent for six months and potentially have your property sitting with them unsold and un-viewed for over five months.”

Readings, who claims his own agency sells properties at an average of 98% of their original asking price, added: “For some sellers a high street estate agent may be the best option, but for many people the online service we provide gives them the service and the savings they are looking for.

“For us it is about getting the right valuation and getting the best exposure for the property.

“If we can sell your house you can move on, and if at any point we fail to meet our 20-point customer service promise, we will sell the house for free.”

House Network claims to be the UK’s longest established online agent, and was set up in 2004.

Its 20-point customer service promise includes vetting every single viewer, returning phone calls within an hour, and taking off shoes when going into homes.