129b, London Road, Portsmouth, PO2 9AA

129b is an end-of-terrace house in Portsmouth (PO2 9AA). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (February 2018) shows an E (score 51), well below the UK norm with real room to improve. When first surveyed in January 2014 the rating was F, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, roof efficiency went from Average to Very Good and lighting went from Very Poor to Very Good. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on electricity. At 38 m² this is the 5th smallest of 19 units on EPC record in the building, where floor areas span 30–122 m². The building's EPC ratings span E to C, with this unit at the bottom.

Across 2001–2014, sale prices on this property compounded at 4.1% per year. Today's modelled estimate of £119,000 sits 83.1% above the 2014 sale of £65,000. Last sold in June 2014, so it's been off the market for around 12 years. Across the public record there are 5 sales, relatively high churn for a single property. At 38 m² it's 29.7% smaller than the typical home in the postcode (54 m² median across 18 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs).