The tender, issued by Circle Housing Merton Priory, spans stakeholder engagement, public affairs and media relations.
Judith Hewitt, interim head of regeneration comms, said: "When it comes to engagement, residents are the first priority, then it’ll be a case of local businesses and developing relationships with others, such as community groups.
"There are a lot of vulnerable and elderly people on the estates and hard-to-reach groups, so I see a lot of it being face to face, whether by exhibitions or another way."
Redevelopment would impact on Eastfield, Highpath and Ravensbury and plans are currently being drawn up, with wider consultation taking place next year ahead of a final decision on whether to go ahead.
Were the scheme to be given planning permission it could take up to 12 years to complete.
Hewitt said that the initial 18-month brief could be extended depending on how plans progress.
Hewitt added: "We will be getting consultants on board to look at the design of the neighbourhood. As we start consultation in spring and decide whether we want to press ahead, it is crucial that we take the residents with us and make sure they feel they’re part of the process.
"This is a major undertaking and we’ll need a breadth [of PR service] when it comes to agency support."
Circle Housing provides 66,000 homes across the country for more than 200,000 residents.