You may need planning permission if you are planning a larger extension. All extensions will need building regulations approval. An architect can assist with this and if planning permission is required. A reputable contractor will also be able to advise you if this is needed as well.
Merriott
Merriott is a town as well as civil parish in Somerset, England, near the community of Crewkerne and also 7 miles (11.3 km) west of Yeovil in the South Somerset area. The village has a population of 1,979. On Church Street, there is a well-preserved tax barn, which is used by local organisations consisting of the playgroup, badminton club as well as a Morris dancing side (Dr Turberville's Morris). The village is residence to Merriott Rovers F.C. who play in the Perry Street and District League, covering Somerset, Dorset and Devon. Also located in Merriott is a Co-op as well as all-purpose grocery store. It has 2 clubs: the 17th century King's Head and the 19th century Swan. The parish boundary includes the River Parrett which is crossed by the Bow Bridge. Next to it is Bow Mill House, with its attached watermill which dates from the 17th century. Tail Mill was made use of for sail towel manufacture.