Builders in Seaford

Seaford has a large number of bungalows and post-war family houses, alongside Victorian and Edwardian homes closer to the town centre and the seafront. Homes in residential districts such as Chyngton, East Blatchington and Sutton range from detached bungalows to semi-detached houses. That combination means the common projects here are a little different from those in a terraced city street. Bungalow owners often look at the roof space first, while families in two storey houses tend to ask about rear extensions and garage conversions. Every house is different, so the right project depends on your plot, your roof and what you need the space for.

For houses outside designated land, the Planning Portal says a single storey rear extension can usually go up to three metres beyond the original rear wall, or four metres for a detached house, without a planning application. It must be no more than four metres high, and within two metres of a boundary the eaves cannot exceed three metres. Extensions and other buildings must not cover more than half the land around the original house. A larger single storey rear extension, up to six metres or eight metres for a detached house, is possible through a prior approval application, which GOV.UK lists at £249 from 1 April 2026. GOV.UK guidance says work cannot start until the council confirms prior approval is not needed, or 42 days pass without a decision.

Seaford is in Lewes district, so Lewes District Council is the first place to check planning questions. Parts of Lewes district lie within the South Downs National Park, where the South Downs National Park Authority is the planning authority, so if you live on the edge of town it is worth confirming which body covers your address. Building regulations are a separate matter, and GOV.UK explains that they cover the construction and extension of buildings. You can use the council or a private registered building control approver, and GOV.UK says a full plans application gets a decision within five weeks, or two months with your consent. Building control charges vary by council, so check your council's building control page for current figures.