Concerned home owners, whose properties were apparently built by the States of Guernsey above German war tunnels, are calling a public meeting.
The Clos de Mont Arrive residents committee has been pressing the island's government for help over subsidence for more than 10 years.
The public are invited to attend the meeting at Beau Sejour on 14 June.
Treasury Minister Lyndon Trott says he has been advised by law officers the States have no legal responsibility.
But residents committee chair Robert Le Bargy, said legal action was possible if the newly-elected States did not respond.
He said: "We have had various meetings with the States, but we came up against a brick wall.
"We are going to re-open the case with the new States and hopefully avoid having to go down the legal route."
German forces, which occupied Guernsey and other Channel Islands from 1940 to1945, used slave labour to construct a mass of tunnels linking concrete fortifications on the islands.