21 23, Flat 3, London Road, Portsmouth, PO2 0BQ

21 23 is a semi-detached house in Portsmouth (PO2 0BQ). It has a recorded floor area of 78 m² (around 840 sq ft) and construction records dating it to 1950-1966. At 78 m² this is the largest unit on EPC record across 21 23 (35–78 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (May 2022) shows a C (score 72). The rating has held steady at C across 2 certificates since July 2010. Between certificates, wall efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good.

Held since October 2001 — that's 25 years off the open market, well above the local norm. At 78 m² the property is well over the postcode median (51 m² across 14 EPCs), placing it in the larger end of the local stock. Across 1999–2001, sale prices on this property compounded at 22% per year. Today's modelled estimate of £293,000 sits 50.3% above the 2001 sale of £195,000.