RICS Level 2 Survey in BN23

The bulk of BN23's residential stock dates from the post-war expansion of Eastbourne eastwards into Langney. Local authority and private estates were laid out through the 1950s, 60s and 70s, producing a mix of semi-detached houses, terraces and purpose-built flats that now account for the majority of transactions in the postcode. These properties were built to the standards of their era - cavity walls filled with early glass mineral wool or left empty, flat and low-pitch roofs with asphalt or felt coverings now well beyond their design life, and electrical systems that have often never been upgraded.

Our inspectors regularly find the following defects across BN23 properties:

• Penetrating damp through failed render or pebbledash on 1960s and 1970s cavity-wall houses
• Flat roof deterioration on rear extensions and integrated garages - felt blistering, ponding water and failed upstands
• Blown cavities from early urea-formaldehyde foam insulation, causing localised damp patches on internal walls
• Corroded or scaled copper pipework in properties not re-plumbed since original construction
• Dated fuse-wire consumer units and unprotected circuits without RCD protection
• Timber window frame rot, particularly on south and west elevations exposed to coastal wind-driven rain
• Salt crystallisation damage to external brick and rendered surfaces within half a mile of the seafront

Older properties closer to the Langney village core and along Seaside Road include some inter-war and Victorian stock where solid wall construction, original single-glazed timber sashes and cast iron drainage are still in place. These require different inspection priorities and often carry higher repair costs when defects emerge.

Parts of Eastbourne and the BN23 district are underlain by Gault Clay, a marine clay deposit that expands when wet and shrinks during dry periods. Properties founded on this geology are susceptible to differential settlement - movement that is rarely uniform across the full footprint of a building and can produce stepped or diagonal cracking in brickwork, sticking doors and windows, and distortion of door frames and internal finishes.

Our surveyors assess crack patterns against BRE Digest 251 criteria, categorising damage from Category 0 (hairline, no action) through to Category 5 (very severe, structural engineer required). During prolonged dry summers of the kind increasingly experienced in the south-east, shrink-swell movement is more pronounced and more likely to be visible at inspection. We document crack positions, widths, step patterns and associated distortion to give you the full picture.

Properties on chalk geology towards the South Downs fringe - the BN26 boundary area - present different ground conditions, but within the main BN23 postcode the Gault Clay risk is the dominant ground concern. We always advise buyers on clay soils to confirm the insurance excess position with their insurer before exchange, as some policies carry elevated excesses for subsidence on reactive soils.

Langney, which forms the core of BN23, was developed primarily between 1950 and 1975 as Eastbourne expanded eastwards. The first phases used traditional construction - cavity brick walls with tile-hung or rendered upper elevations, pitched roofs with interlocking concrete tiles, and timber floors throughout. By the late 1960s and into the 1970s, construction methods shifted towards larger concrete block cavities, flat and monopitch roofs over rear extensions, and the introduction of UPVC windows that replaced original timber sashes and casements.

Properties from the first Langney phase (late 1940s to early 1960s) may still have original rafters and joists in good condition, but roof felt will be at or beyond the end of its serviceable life. Gutters and fascias on these properties are frequently original cast iron or timber, requiring maintenance that has often been deferred. Our inspectors probe fascias and soffits for softness and check internal evidence of long-term water ingress at roof-to-wall junctions.

Princes Park, a more varied area towards the southern edge of BN23, has a higher proportion of flats and converted properties. Purpose-built blocks from the 1970s often have flat roofs that have been recovered once or twice - our inspection checks for signs of ponding, failed upstand flashings, and internal ceiling staining consistent with historical or active leaks through the roof deck.