13 The Post Office, West Sunniside, Sunderland, SR1 1BH

13 The Post Office is a one-bedroom semi-detached house in Sunderland (SR1 1BH). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1900-1929 and council tax band B. Tenure is freehold. The latest certificate (August 2018) shows an E (score 50), well below the UK norm with real room to improve. When first surveyed in December 2009 the rating was F, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor; while hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 84), a 3-band jump. Main heating runs on electricity. At 46 m² this is the 2nd smallest of 31 units on EPC record in the building, where floor areas span 34–122 m². The building's EPC ratings span E to B, with this unit at the bottom.

Held since March 2006 — that's 20 years off the open market, well above the local norm. At 46 m² it sits well below the postcode median (72 m² across 30 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). Today's modelled estimate of £115,000 is 15% above the 2006 sale price. On a £-per-square-foot basis, the last sale (£202/sq ft) was about 34.9% above the typical sold price in the postcode.