Gibbons Rent, south London, Salisbury Quaker Meeting House Courtyard Garden, Montpelier Community Nursery Garden, north London and Wenceling Garden in Lancing, West Sussex were chosen as the best four after being nominated by members of the public.
In this category judges look at the range of factors and circumstances surrounding each design and how it has affected the community that uses it.
The gardens add to 35 previous projects shortlisted for the awards, all designed by members of the SGD.
The winners of all the awards will be revealed at a ceremony on 24 January.
More details here.