A Nailsea GP surgery could be sold off and replaced with houses.
Tyntesfield Medical Group is considering closing its surgery at Brockway and selling the land to a property developer.
The money raised would allow it to build a larger surgery to help Nailsea cope with the large number of houses which are set to be built over the next two decades.
Long-term housing plans indicate thousands of houses will be built on the edge of Nailsea, and practitioners feel there will be insufficient medical provision to cope if changes are not made.
Tyntesfield Medical Group has published a letter for patients outlining its plan to seek planning permission for homes to be built on the GP surgery site, opposite Scotch Horn Leisure Centre.
But it stresses no final decision has been made about Brockway's future.
Lawrie Lewis, the group's executive manager, said: "The residents of Nailsea will know that there is a large expansion of housing planned for the town over the next decade.
"We recognise that the current facilities of Tower House and Brockway Medical Centre, situated just a few hundred yards from each other, would not be able to meet the anticipated increase in demand and we are therefore exploring our options to expand our facilities in the town."
Planning permission has already been given for 183 homes at Engine Lane, while approximately 2,500 houses are also earmarked for Nailsea in North Somerset Council's long-term plans.
Mr Lewis added: "Brockway Medical Centre has, over the years, been redeveloped.
"It is in many ways a great building but it has just about reached its maximum potential as a health centre and could not support another meaningful extension.
"One of the options available to us would be to close Brockway in favour of a new facility in Nailsea that could cope with both the increased population and the prospect of delivering a greater range of healthcare services.
"(So) we are exploring whether Brockway, if it had planning permission for homes thereon, sufficiently increases the value and attractiveness of the site to developers to make the development of another health facility in the town financially viable to us."
Tyntesfield Medical Group also runs the medical centres in Backwell and Long Ashton.
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