East Sussex · BN7
Structural Alterations in Lewes
A structural alteration, or knock-through, removes or alters a load-bearing wall — typically to join a kitchen and dining room — and requires structural calculations from an engineer, a supporting steel beam sized to the load, and Building Regulations approval before and after the work.
In Lewes, that covers Cliffe, Southover, Landport, Nevill, Malling, Wallands. Lewes is the historic county town of East Sussex, built on a steep hillside above the River Ouse within the South Downs National Park, with a dense concentration of listed and historic buildings in its centre.
Coverage
Areas we cover in Lewes for structural alterations
Property styles in Lewes
The town centre includes a significant number of listed timber-framed, Georgian and Victorian buildings, often on constrained, steeply sloping plots, while the surrounding residential areas include Victorian terraces and 20th-century housing on the town's edges.
Planning considerations
Lewes District Council is the local planning authority, and the town sits within the South Downs National Park, which has its own planning authority function for certain matters and places significant weight on landscape and heritage impact. Much of the town centre is a conservation area with numerous listed buildings.
How it works
Our structural alterations process
- 01
Structural survey
Assessing the wall, what it supports, and the loads involved, ahead of instructing an engineer.
- 02
Engineer's calculations
A structural engineer sizes the steel or other structural solution and produces calculations for Building Control.
- 03
Building Regulations and party wall
Submitting a Building Regulations application and serving party wall notice if the work affects a shared wall.
- 04
Construction
Temporary propping, forming the opening, installing the steel and making good, with a Building Control inspection before the work is covered up.
Also in this area
Other services we provide in Lewes
Nearby coverage
Structural Alterations in nearby areas
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FAQs
Structural Alterations in Lewes: FAQs
Do you provide structural alterations across all of Lewes?
Yes, we cover the BN7 postcode area in full, including Cliffe, Southover, Landport, Nevill, Malling, Wallands.
Do I need planning permission to remove an internal wall?
Usually no — removing an internal load-bearing wall is normally a Building Regulations matter rather than a planning one, provided the property isn't listed and the work doesn't affect the external appearance. We confirm the position for your property at survey.
How do I know if a wall is load-bearing?
Load-bearing walls typically run perpendicular to floor or roof joists, sit above a wall or support on the floor below, or align with the roof structure — but this isn't reliable to judge by eye, so we assess it on-site and confirm with a structural engineer before any work starts.
How does South Downs National Park status affect building work in Lewes?
Development within the National Park is assessed with particular regard to landscape character and setting, alongside normal planning policy. Combined with the town's conservation area and listed building status, this means early advice is particularly valuable in Lewes.
Get a quote for structural alterations in Lewes
Tell us about the property and what you have in mind, and we'll arrange a site visit.
Last reviewed 2026-07-28.