21 Warkton Lane, Barton Seagrave, Kettering, NN15 5AB

21 Warkton Lane is a five-bedroom semi-detached house in Barton Seagrave, Kettering, Kettering (NN15 5AB). It has a recorded floor area of 234 m² (around 2519 sq ft), construction records dating it to 1930-1949 and council tax band E. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. Other recorded features include a self-contained annexe and attached land beyond the plot. The latest certificate (July 2026) shows a D (score 65), on the cusp of jumping into the C band. Earlier certificates rated it C (July 2014); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Good and lighting went from Average to Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 71). This certificate was lodged in the last six months, so the rating reflects current condition.

Held since October 2002 — that's 24 years off the open market, well above the local norm. Across 2001–2002, sale prices on this property compounded at 10.8% per year. Today's modelled estimate of £552,000 sits 176% above the 2002 sale of £200,000. On a £-per-square-foot basis, the last sale (£79/sq ft) was about 48.1% below the postcode norm. One planning record on file: an extension approved in 2018. Past consents include an extension, meaningful when judging how the property has evolved.