23 Dolphin House, Sutton Wharf, Plymouth, PL4 0BL

23 Dolphin House is a one-bedroom mid-terrace house in Plymouth (PL4 0BL). It has a recorded floor area of 49 m² (around 527 sq ft) and construction records dating it to 1976-1982. The latest certificate (November 2024) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2009); the latest reading is one band lower. Between certificates, lighting went from Poor to Very Good; while wall efficiency dropped from Good to Average and main heating dropped from Poor to Very Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity. At 49 m² this is the 4th smallest of 24 units on EPC record in the building, where floor areas span 33–213 m². The building's EPC ratings span E to B across 24 units on file. Other recorded features include a balcony and notable views.

Across 1999–2014, sale prices on this property compounded at 7.8% per year. On a £-per-square-foot basis, the last sale (£228/sq ft) was about 32.7% above the typical sold price in the postcode. Last changed hands 12 years ago, in March 2014. At 49 m² it's 29% smaller than the typical home in the postcode (69 m² median across 23 EPCs).