19c, Borough Road, Sunderland, SR1 1EQ

19c is a one-bedroom end-of-terrace house in Sunderland (SR1 1EQ). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (October 2019) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2009. Between certificates, roof efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 75). At 49 m² this is the 6th smallest of 9 units on EPC record in the building, where floor areas span 32–93 m². The building's EPC ratings span E to C across 9 units on file.

It hasn't traded since January 2007, a hold of 20 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 49 m² it's 28.9% larger than the typical home in the postcode (38 m² median across 8 EPCs). Today's modelled estimate of £117,000 is 11.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£199/sq ft) was about 27% above the typical sold price in the postcode.