20 Challis Avenue, Chaddesden, Derby, DE21 6LG

20 Challis Avenue is a three-bedroom end-of-terrace house in Chaddesden, Derby, Derby (DE21 6LG). It has a recorded floor area of 92 m² (around 985 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (April 2009) shows an E (score 47), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 55). The latest certificate is from April 2009, so improvements made since then won't be reflected. Other recorded features include attached land beyond the plot.

Untraded for 17 years, with the last transfer in July 2009. Across the public record there are 4 sales, relatively high churn for a single property. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). Across 2002–2009, sale prices on this property compounded at 19.3% per year. Today's modelled estimate of £139,000 is 41.9% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£99/sq ft) was about 24.2% below the postcode norm. 2 planning records sit against the property, 1 approved, 1 refused.