20a, Alder Copse, Horsham, RH12 1LD

20a is a semi-detached house in Horsham (RH12 1LD). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (December 2025) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since July 2013. Between certificates, roof efficiency went from Good to Very Good and lighting went from Poor to Good; while window efficiency dropped from Average to Poor. This certificate was lodged in the last six months, so the rating reflects current condition.

Held since March 2005 — that's 21 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2005, sale prices on this property compounded at 3.3% per year. Today's modelled estimate of £346,000 sits 338% above the 2005 sale of £79,000. On a £-per-square-foot basis, the last sale (£90/sq ft) was about 64.9% below the postcode norm. One planning record on file: an extension approved in 2004. Past consents include an extension, meaningful when judging how the property has evolved.