17a, Basement Flat, Heene Terrace, Worthing, BN11 3NR

17a is a two-bedroom mid-terrace house in Worthing (BN11 3NR). It has a recorded floor area of 76 m² (around 818 sq ft) and construction records dating it to before 1900. Tenure is freehold. At 76 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 31–115 m². The building's EPC ratings span F to C, with this unit at the top. On EPC score it ranks first in the building (73 versus a worst of 32). Other recorded features include a basement. Period features are noted in the property record. The latest certificate (May 2022) shows a C (score 73).

One historical planning record sits against the property in 2004. The record references listed-building consent, which constrain future alterations. Most recent transfer: March 2023 at £272,500. Across the public record there are 5 sales, relatively high churn for a single property. Across 2002–2023, sale prices on this property compounded at 6% per year. On a £-per-square-foot basis, the last sale (£333/sq ft) was about 50.6% above the typical sold price in the postcode.