Brockwell Park, in south London, and Whitstable Castle Park, in Kent, will split the cash with Castle Park and Hale Park, both in Cheshire.
Brockwell Park received £3.5m to restore historic landscaping and buildings, upgrading footpaths, entrances, furniture and signage.
Whitstable Castle Park will get £2m to allow the Rose Garden and Lower Terrace to be remodelled.
The 5ha Hale Park has received a grant of £643,000 to provide a community space for local people and visitors to the village.
Castle Park, in Frodsham, was designed by Edward Kemp and a £1.84m grant will restore the landscape back to his original design.