Jo Thompson's design, for Outdoor Creations, is for a garden which backs on to a newly renovated house, and is a garden suitable for socialising.
It has a limestone terrace, seating areas, a firepit and log store and planting space.
Materials for the garden included limestone, balau hardwood and stone chippings.
Jo Thompson has also been nominated by House & Garden magazine as one of the UK’s 10 rising stars of garden design for 2011.
Thompson - who's blog The Unexpected Gardener features on horticultureweek.co.uk said: "It has been a phenomenal start to the year and recognition for my work is coming as a totally pleasant surprise."
The winners will be announced at the APL awards on Thursday 10 February.