OnTheMarket has enlisted the 25-branch south of England agency Goadsby and says this takes its total of sales and lettings offices to over 6,500 - if ‘letters of intent’ are included, according to Estate Agency Today.
In the report OTM chief executive Ian Springett says the company is extremely pleased to be welcoming a firm of the size and quality of Goadsby.
"This latest multi-branch firm to join us is another terrific example of how our momentum is building,” Springett says.
Goadby will continue advertising on Rightmove; it was not on Zoopla.
Earlier this year OTM claimed its 'overall support' had reached over 6,500 offices and has asserted this figure remains valid if those signing letters of intent are included.
However it is not known if the figure also includes agents who believe they have disengaged from the portal and are now caught up in various stages of legal action involving OTM parent company Agents’ Mutual.
Meanwhile fall out continues from the open letter to agents and portals last week from the UK's competition watchdog the Competition and Markets Authority (CMA), warning against collusion in their choice of portals to use or ‘drop'.
The letter stated that the authority had "became aware that some estate agents may be making joint decisions to join the OnTheMarket portal and to remove their business from competing portals, rather than reaching these decisions independently of each other."
It also said "The CMA has contacted some agents that it suspects may have been directly involved in such activity and warned "Agreeing with your competitors to restrict which suppliers you will deal with is likely to be unlawful."
The CMA letter said "The decision as to whether an estate agent will or will not use the services of a particular property portal must be determined by that estate agent alone (or by its parent company), and must not be determined jointly between competitors."
Estate agents found to have breached competition law can be fined up to 10 per cent of their annual worldwide turnover, and directors of infringing companies can be disqualified from UK company directorships for up to 15 years.
However a CMA spokesperson has told Property Portal Watch it cannot reveal whether any individual or company is under investigation by the authority.
But it did confirm for Estate Agent Today that its warning and potential action would apply to those agents eventually becoming full members of OTM via letters of intent.
Ian Springett has consistently maintained OTM and Agents' Mutual support the CMA warning that agents must act independently and avoid collusion.
“We welcome that stance and have consistently given agents precisely the same advice to make any portal selection decisions independently,” he told business newspaper City AM.