Martin & Co, the lettings franchise chain which recently expanded into sales, is to offer an online property sales service.

It says it is the first high street agent to do so.

Notably, it has not launched an online lettings service, but sellers can now choose between Martin & Co’s traditional commission-based estate agency service or its new fixed fee online service where – says the firm – “the vendor handles their own sale”.

For an upfront fee of £499, vendors will be able to advertise on the UK’s largest property portals, including Rightmove and Zoopla.

As a high street agent, Martin & Co’s online vendors will receive the additional support of traditional shop window advertising in local branches and advertising to a database of registered buyers.

As part of its online service, Martin & Co will handle the initial stages of the sales process, including advising vendors on valuation and how to achieve the best price for their property, completing photography and particulars for the customer and relaying enquiries from potential buyers.

Martin & Co will not charge commission on sales through its online service.

If customers decide to switch within the first two weeks to Martin & Co’s traditional services, the upfront fee they have paid will be deducted from the commission payable on sale.

Martin & Co’s chief executive Ian Wilson said: “In a first for the UK estate agency industry, Martin & Co is providing choice and offering both traditional and online estate agency services to vendors.

“While we believe the traditional service will continue to be the norm, a growing number of people are choosing to personally manage the sale of their property through online platforms.

“Our new online offering will provide vendors with the highest quality service to market their property effectively and help them to achieve their desired valuation.”

Martin & Co went into property sales in 2012.

At the end of last year, the company floated on the AIM stock market.

While the move into online agency will not affect Martin & Co’s ability to list on Rightmove and Zoopla, it will affect any decision to list on the new Agents’ Mutual portal that launches in January.

Online agents will be banned from OnTheMarket – although full-service high street agents are eligible.

A spokesman for Martin & Co said: “It’s fair to say that Martin & Co is monitoring developments with Agents’ Mutual, but no firm decision has yet been taken.”