Wasps are often not a pest if left alone.
Depending on the location of the wasp nest it may not be necessary to destroy it. In spring the wasp will look for a nesting site such as a hole in the ground, a hollow tree or in spaces within the edges of a building roof, loft or garden shed. In June nest building will start and will usually reach full size in September. In autumn the young queens mate and leave the nest, the rest of the nest dies out and the nest is not used again.
If you decide to destroy the nest yourself you can buy insect sprays and powders from most hardware shops and garden centres, but care must be taken to follow the instructions on the label.
There are local and national companies that can also provide a similar service, try searching local telephone directories or the Internet for pest control.