15a Heene Court Mansions, Heene Terrace, Worthing, BN11 3NW

15a Heene Court Mansions is a mid-terrace house in Worthing (BN11 3NW). It has a recorded floor area of 17 m² (around 183 sq ft), construction records dating it to before 1900 and council tax band A. At 17 m² this is the smallest unit on EPC record across the building (17–161 m²). The building's EPC ratings span E to C across 28 units on file. The latest certificate (September 2019) shows a D (score 56), a step below the typical UK home. When first surveyed in July 2009 the rating was F, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Good, lighting went from Very Poor to Very Good and main heating went from Very Poor to Good.

At 17 m² it sits well below the postcode median (65 m² across 27 EPCs), making it one of the more compact homes locally. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include subdivision, meaningful when judging how the property has evolved. On a £-per-square-foot basis, the last sale (£628/sq ft) was about 141.3% above the typical sold price in the postcode. Last sold in November 2017, so it's been off the market for around 9 years.