70 71, Princes Square, Westminster, London, W2 4NY

70 71 is a mid-terrace house in Westminster, London, London (W2 4NY). It has a recorded floor area of 61 m² (around 657 sq ft), construction records dating it to before 1900 and council tax band E. At 61 m² this is the 10th smallest of 14 units on EPC record in 70 71, where floor areas span 34–119 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (51 versus a best of 72). The latest certificate (June 2018) shows an E (score 51), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 65).

Across 1997–2018, sale prices on this property compounded at 10.7% per year. Today's modelled estimate of £800,000 is 41.2% below the 2018 sale of £1,360,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£2,071/sq ft) was about 75% above the typical sold price in the postcode. At 61 m² the property is well over the postcode median (46 m² across 40 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in April 2018 and unlisted since — roughly 8 years. Across the public record there are 5 sales, relatively high churn for a single property. 5 planning records sit against the property, 1 approved, 1 refused.