21 York Apartments, Martinet Road, Thornaby, Stockton On Tees, TS17 0AS

21 York Apartments is a mid-terrace house in Thornaby, Stockton-On-Tees, Stockton On Tees (TS17 0AS). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 2003-2006 and council tax band B. The latest certificate (August 2023) shows a C (score 75), near the top of the C band. Earlier certificates rated it B (May 2012); the latest reading is one band lower. Between certificates, wall efficiency dropped from Very Good to Good and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to B (score 86). Main heating runs on electricity. At 64 m² this is the 6th smallest of 26 units on EPC record in the building, where floor areas span 60–94 m². The building's EPC ratings span D to B across 26 units on file.

Today's modelled estimate of £110,000 sits 120% above the 2022 sale of £50,000. On a £-per-square-foot basis, the last sale (£73/sq ft) was about 26.4% below the postcode norm. Sold March 2022 for £50,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.