20 Armstrong Close, Borehamwood, WD6 1RR

20 Armstrong Close is a one-bedroom mid-terrace house in Borehamwood (WD6 1RR). It has a recorded floor area of 44 m² (around 474 sq ft), construction records dating it to 1996-2002 and council tax band C. At 44 m² this is the 8th smallest of 29 units on EPC record in the building, where floor areas span 32–120 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (57 versus a best of 81). The latest certificate (September 2018) shows a D (score 57), a step below the typical UK home. Earlier certificates rated it C (April 2018); the latest reading is one band lower. Between certificates, main heating dropped from Average to Very Poor. The recommended improvements would push it to C (score 77). Main heating runs on electricity.

Sold September 2019 for £225,000. Across the public record there are 4 sales, relatively high churn for a single property. At 44 m² it's 24.8% smaller than the typical home in the postcode (59 m² median across 28 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs). Across 2001–2019, sale prices on this property compounded at 4.4% per year. Today's modelled estimate of £249,000 is 10.7% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£475/sq ft) was about 78.9% above the typical sold price in the postcode.