Great Gaddesden is a large rural parish stretching from the north eastern boundary of Hemel Hempstead to the county boundary with Bedfordshire, a distance of some four miles. Widely dispersed within the parish, which is three miles in width and has a population of less than a thousand, are the villages of Great Gaddesden and Gaddesden Row and the hamlets of Bridens Camp, Water End and St Margarets.

Each of the settlements contains buildings of historic interest; Great Gaddesden has the fine 12c. church of St John the Baptist, a 15th c. cruck barn and early 17c. cottages.

At Gaddesden Row are to be found the Golden Parsonage dating from 1706 but built on the foundations of an earlier medieval structure, The Hoo and Stags End House, both of 17c. origins and Gaddesen Place built by Thomas Wyatt in 1768 although the present house was rebuilt in 1905 following a disastrous fire.

Nearby at Water End are the 13c. Gaddesden Hall and Noke Mill to which reference is made in the Domesday Book whilst within the hamlet the cottages date from 13th to 16th century.

Recently built at St Margarets where almost all the houses date from the early 17th c. is the Amavarati Buddhist Temple.

The parish is unique in that all of the land within the parish is devoted to either agriculture or forestry, much of the land being accessible for recreation by way of the many footpaths and bridleways, and under the Countryside Stewardship Scheme at Water End. The River Gade is an important feature of the parish, all of which lies within the Chiltern Area of Outstanding Natural Beauty.