York House, Flat 11, 39 Upper Montagu Street, Westminster, London, W1H 1FR

York House is a three-bedroom mid-terrace house in Westminster, London, London (W1H 1FR). It has a recorded floor area of 175 m² (around 1884 sq ft) and construction records dating it to 1967-1975. The latest certificate (August 2023) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in September 2009 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Good, hot-water efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good. The recommended improvements would lift it to B (score 81), a 2-band jump. Main heating runs on electricity. At 175 m² this is the 22nd smallest of 28 units on EPC record in York House, where floor areas span 55–264 m². The building's EPC ratings span F to C across 28 units on file.

It hasn't traded since December 2009, a hold of 16 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 175 m² the property is well over the postcode median (110 m² across 27 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £1,847,000 sits 122.5% above the 2009 sale of £830,000. On a £-per-square-foot basis, the last sale (£441/sq ft) was about 43% below the postcode norm.