Owners of the Marshall Tavern late last week filed a lawsuit against the California Coastal Commission, claiming the agency has imposed unduly restrictive conditions on their attempt to restore a property whose vacancy stretches back more than two decades.

The lawsuit, filed in Marin County Superior Court on Friday, challenges what East Bay owners Daniel Altman and Avi Atid contend are “unconstitutional” conditions placed on a building permit issued two months ago by the state…