There's a call in St Ives for a review of the policy that restricts newly-built homes to people living in them full-time.
Eighteen months since being introduced, one estate agent says it's "pushing up prices" and no new affordable homes have been built.
It comes as Mevagissey has become the fifth place in Cornwall to adopt the clause as part of a local housing plan. It held a referendum on Thursday in which 90% of those who voted were in support.
Steve Cross, from Cross Estate Agents in St Ives, says a "comprehensive review" needs to take place.
But supporters of the second homes plan like St Ives town councillor, Rita Lait, says it's too early to judge...