4 Park Street, Aylesbury, HP20 1BX

4 Park Street is a two-bedroom detached house in Aylesbury (HP20 1BX). It has a recorded floor area of 62 m² (around 667 sq ft), construction records dating it to 1967-1975 and council tax band B. At 62 m² this is the 8th smallest of 25 units on EPC record in the building, where floor areas span 52–88 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (January 2019) shows an E (score 42), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since October 2008. Between certificates, lighting went from Very Poor to Good; while hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to D (score 61). Main heating runs on electricity.

Held since September 2003 — that's 23 years off the open market, well above the local norm. Across 1999–2003, sale prices on this property compounded at 19.7% per year. Today's modelled estimate of £186,000 sits 80.6% above the 2003 sale of £103,000. On a £-per-square-foot basis, the last sale (£154/sq ft) was about 20.3% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs).