A major protest to defend the green belt is being held this weekend ahead of a public inquiry into the plan.
Sutton Coldfield MP Andrew Mitchell will join campaigners on a walk around the green belt site earmarked for development by council planning chiefs.
Council bosses claim the site, off the A38 near Walmley, is needed to meet
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Members of the 'Project Fields' campaign to save the green belt are calling on supporters to join them for the protest at 10am on October 11, starting in Laburnum Drive.
They are also protesting against proposals for a major factory on a neighbouring green belt site at Peddimore.
Organiser Suzanne Webb said: "It is important we work as one community, draw on the strengths of those around us and on the resolve of local residents who strongly believe that to build 6,000 homes and an employment zone the size of the Jaguar Land Rover site is not sustainable.
"Birmingham only has 15 per cent open space remaining, once we built on that what little open space we have, where do we go next? At some point the city has to say it is full."
Coun Ken Wood (Con Sutton New Hall) added: "This walk will raise awareness of the scale of the development we are facing. I urge everyone concerned about the future of our green belt to join us."
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The protest comes ahead of a four week public inquiry into the Development Plan starting on October 21 at Aston University and chaired by Government inspector Roger Clews.
The plan outlines proposals for the development of Birmingham over the next 20 years - including the need to find space for up to 80,000 extra homes.
With space only available for 43,000 in the existing built up area, the council has earmarked the Sutton Coldfield site, plus further expansion on green belt in north Worcestershire and available sites in neighbouring districts like Sandwell.
The green belt issue will be looked at in detail on October 28 and 29, with MP Mr Mitchell among those set to speak.
He said: "None of us disputes that more housing needs to be built to support and further this expansion.
"However, it does not serve the general interests of anyone in the wider Birmingham area to build on Sutton Coldfield's Green Belt.
"Throughout Sutton, we are resolutely opposed to the scale of development outlined in the Plan, and our arguments are cogent and well thought through in pointing to other alternatives."
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Others giving evidence at the inquiry include developers, planning consultants, campaigners and public organisations like the Highways Agency and city council.
Last month, campaigners held a protest at a council meeting, criticising development bosses for ignoring more than 5,000 letters and comments from residents and organisations opposing the green belt development when drawing up the plan.