Walsall Council could be hit with compensation claims over Stonegate and Trent Park estates determination.
Land was suspected as contaminated after redevelopment of a former gasworks site for housing, and designated as contaminated by the local authority in 2012.
This designation was overturned in 2017 by the secretary of state for environment following a public enquiry. The local authority took further advice and has
now concluded that the land is not contaminated. Compensation is now demanded by residents.