OnTheMarket says Andrew Milsom Estate Agents, a six branch agency in Buckinghamshire and Berkshire, has joined the portal.
The website says the agency will list its properties for sale and to rent on OTM and Rightmove, after removing them from Zoopla.
In a statement this morning from OTM, agency director Andrew Milsom describes the challenger portal as “a refreshing change for the consumer” while Helen Whiteley, commercial director of OnTheMarket, says the agency “strengthens our market position in the Thames Valley and Chiltern Hills area.”
Earlier this year OTM announced Nottingham Estate Agency and Harrison Murray’s 37-branch network was going to list, as well as the eight branch firm Arnolds Keys, plus Jeffries, a seven branch firm in South East Hampshire and Goadsby, a 25-branch firm with offices across south England.
Earlier this week the portal announced that it now had more than 6,400 estate and letting agency offices listing on its site - a total reached after 12 successive months of growth.
The figure represents an increase of almost 1,000 offices year on year, the portal says. This is an increase of 17 per cent.