17d, High Green, Gainford, Darlington, DL2 3DL

17d is a semi-detached house in Gainford, Darlington, Darlington (DL2 3DL). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (April 2021) shows an E (score 41), well below the UK norm with real room to improve. When first surveyed in January 2019 the rating was F, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good; while hot-water efficiency dropped from Average to Very Poor and lighting dropped from Good to Average. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on electricity. At 43 m² this is the 3rd smallest of 19 units on EPC record in the building, where floor areas span 39–381 m². The building's EPC ratings span G to C across 19 units on file.

At 43 m² it sits well below the postcode median (108 m² across 18 EPCs), making it one of the more compact homes locally. Across 2021–2022, sale prices on this property compounded at 59.1% per year. Today's modelled estimate of £117,000 is 11.4% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£227/sq ft) was about 78.7% above the typical sold price in the postcode. Sold September 2022 for £105,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.