Southampton as well as Basingstoke & Deane are both expected to see a 37% increase in second homeowners in 2020 and 2021, Swinton Insurance has predicted.
Other strong areas are expected to be Brentwood (35%), Newcastle-under-Lyme (27%) and Warwick (25%).
Between 2010 and 2018 Croydon in London has seen the biggest increase (6,529%) in second homes in the UK, followed by Cannock Chase (1,650%).
There are far more second homes in Greater Manchester, with Rochdale (1,048%) were Manchester (917%), Salford (550%) and Bolton (419%) all seeing a big rise.
West Dunbartonshire in Scotland has seen the biggest drop in second homes, with a decrease of -98%.