21 Chatburn Avenue, Burnley, BB10 4NX

21 Chatburn Avenue is a two-bedroom semi-detached house in Burnley (BB10 4NX). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (January 2016) shows a D (score 60), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2010); the latest reading is one band lower. Between certificates, roof efficiency dropped from Good to Poor and lighting dropped from Very Good to Very Poor. The recommended improvements would push it to C (score 70). The latest certificate is from January 2016, so improvements made since then won't be reflected. At 72 m² this is the 42nd smallest of 47 units on EPC record in the building, where floor areas span 43–77 m². The building's EPC ratings span E to C across 47 units on file.

Across 2006–2021, sale prices on this property compounded at -0.5% per year. Today's modelled estimate of £107,000 sits 63.4% above the 2021 sale of £65,500. On a £-per-square-foot basis, the last sale (£85/sq ft) was about 16.8% above the typical sold price in the postcode. It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs). Sold April 2021 for £65,500. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.