19 St Margarets Avenue, Barnet, London, N20 9LL

19 St Margarets Avenue is a four-bedroom semi-detached house in Barnet, London, London (N20 9LL). It has a recorded floor area of 144 m² (around 1550 sq ft), construction records dating it to 1930-1949 and council tax band F. The property has underfloor heating on record, all of which lower running costs and tend to lift resale appeal. The latest certificate (July 2025) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since November 2008. Between certificates, window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 75).

Held since February 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 144 m² the property is well over the postcode median (104 m² across 22 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £1,053,000 sits 156.8% above the 2009 sale of £410,000. On a £-per-square-foot basis, the last sale (£265/sq ft) was about 29.1% below the postcode norm. One planning record on file: an extension approved in 2014. Past consents include an extension, meaningful when judging how the property has evolved.