66a, Catharine Street, Cambridge, CB1 3AR

66a is a semi-detached house in Cambridge (CB1 3AR). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 2012-2021 and council tax band B. The latest certificate (October 2025) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in February 2010 the rating was E, the property has climbed 1 band since. Between certificates, main heating went from Very Poor to Poor. The recommended improvements would push it to C (score 76). Main heating runs on electricity. At 55 m² this is the 9th smallest of 54 units on EPC record in the building, where floor areas span 24–171 m². The building's EPC ratings span E to C across 54 units on file.

Today's modelled estimate of £280,000 is 19.1% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£397/sq ft) was about 30.3% above the typical sold price in the postcode. Last sold in May 2016, so it's been off the market for around 10 years. At 55 m² it's 26.7% smaller than the typical home in the postcode (75 m² median across 53 EPCs). One historical planning record sits against the property in 2014.