21 Borrowdale Avenue, Sunderland, SR6 8LJ

21 Borrowdale Avenue is a three-bedroom mid-terrace house in Sunderland (SR6 8LJ). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (January 2026) shows a C (score 73). When first surveyed in November 2013 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good; while roof efficiency dropped from Very Good to Good and window efficiency dropped from Average to Poor. Period features are noted in the property record. Records show the property has been extended at some point in its history. The home occupies a cul-de-sac position.

At 92 m² the property is well over the postcode median (70 m² across 20 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 75% of similar EPCs). One planning record on file: an extension approved in 2017. Past consents include an extension, meaningful when judging how the property has evolved. Across 2014–2022, sale prices on this property compounded at 8.2% per year. Today's modelled estimate of £265,000 is 10.4% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£242/sq ft) was about 33.4% above the typical sold price in the postcode. Most recent transfer: July 2022 at £239,950. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.