Throgmorton House, Flat 6, 27 Elphinstone Road, Southsea, PO5 3HP

Throgmorton House is a semi-detached house in Southsea (PO5 3HP). It has a recorded floor area of 33 m² (around 355 sq ft) and construction records dating it to 1900-1929. At 33 m² this is the smallest unit on EPC record across Throgmorton House (33–122 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (August 2021) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (March 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 74).

A recent sale: £148,000 in May 2025. At 33 m² it sits well below the postcode median (55 m² across 39 EPCs), making it one of the more compact homes locally. Across 2006–2025, sale prices on this property compounded at 2.1% per year. Today's modelled estimate of £164,000 is 10.8% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£417/sq ft) was about 149.5% above the typical sold price in the postcode.