Sash windows in Lewes: check planning first, then choose the frame
Most of central Lewes is a conservation area under an Article 4 direction, and the parish has more than five hundred listed buildings. So in this town the first question about new windows is not which frame, but whether you need permission and from whom. This site starts there.
Check your house first Call 01273 115145
Three questions settle most Lewes window jobs
The planning checker walks through them. In short:
- Is the building listed? Lewes has nine Grade I, twenty-two Grade II* and 499 Grade II listed buildings. If yours is one of them, any change to the windows that affects its character needs listed building consent, and timber made to the old pattern is usually where that ends up. Listed buildings in Lewes.
- Is it inside the Lewes conservation area? The area was first designated in 1970 and runs from the Cliffe to Southover and out through the Wallands. An Article 4 direction confirmed in 1996 removes permitted development rights for alterations on the sides of houses that face a road, a waterway or open space. What the Article 4 direction means for windows.
- Is it a house or a flat? Flats have no householder permitted development rights, so a change in the look of the windows needs planning permission wherever the flat is.
Since 1 April 2026 all of these decisions in Lewes are made by the South Downs National Park Authority's own planning team, based at County Hall. Ringmer, Barcombe and most of Cooksbridge sit outside the Park and go to Lewes District Council. Who decides, and where to apply.
Then the frame
The order below follows what most Lewes houses can actually have.
uPVC sash windows. For houses outside the conservation area, rear elevations inside it that face only a garden, and front elevations where the Authority has given permission. Woodgrain and heritage colours, horns, two-over-two or six-over-six bars to match the house.
Timber box sash windows. For listed buildings and for fronts covered by the Article 4 direction where the planners expect timber. From £2,650 installed per window.
Flush casement windows. For flint cottages in Kingston, Glynde and Rodmell, older buildings in the town that were built with casements, and the 1920s to 1960s houses in the villages.
Front doors. For terraces and cottages, with the same Article 4 question applying to a door on a street-facing wall as to a window.
What jobs cost here
There are no price lists on this site. Instead the example jobs page sets out eight typical jobs in and around Lewes, from one rear sash to a whole house, each with a total range, and puts a uPVC front and a timber front side by side for the same type of terrace so you can see what the Article 4 choice costs.
Where this covers
Lewes itself, from the Pells and the Wallands to Malling, the Cliffe and Southover, and six villages around it: Ringmer, Kingston, Barcombe, Glynde, Cooksbridge and Rodmell. Each village page says which authority handles planning there and whether there is a conservation area.
Enquiries go to a FENSA-registered installer who surveys and quotes in its own name. How enquiries work.