East Sussex · BN7
Conversions in Lewes
A property conversion changes the use of existing space — such as a loft, garage, barn or outbuilding — into new habitable accommodation, and typically involves structural alterations, insulation upgrades, new services, and Building Regulations approval, with planning permission or listed building consent needed in some cases.
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 conversions
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 conversions process
- 01
Feasibility survey
Checking head height, structural capacity, access and services for the proposed conversion.
- 02
Design and approvals
Preparing drawings and securing planning permission (where required) and Building Regulations approval.
- 03
Structural works
Strengthening floors, forming stairs or openings, and altering roof structure where needed.
- 04
Insulation and services
Upgrading insulation, and installing or extending electrics, heating and (for loft conversions) fire escape provisions.
- 05
Fit-out
Plastering, flooring, joinery and decoration.
- 06
Completion
Building Control sign-off and handover.
Also in this area
Other services we provide in Lewes
Nearby coverage
Conversions in nearby areas
FAQs
Conversions in Lewes: FAQs
Do you provide conversions 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 for a loft conversion?
Many loft conversions fall under permitted development if they stay within volume limits and do not extend beyond the roof plane at the front. Dormers, roof terraces, and conversions on designated land or flats usually need planning permission. We confirm this at feasibility stage.
What head height do I need for a loft conversion?
As a general guide, a minimum ridge height of around 2.2 to 2.3 metres is usually needed for a workable staircase and standing space, though this varies with roof pitch and layout. We measure this on survey before advising on feasibility.
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 conversions in Lewes
Tell us about the property and what you have in mind, and we'll arrange a site visit.
Last reviewed 2026-07-19.