12 Rock Road, Cambridge, CB1 7UF

12 Rock Road is a four-bedroom detached house in Cambridge (CB1 7UF). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 2012-2021 and council tax band F. At 45 m² this is the smallest unit on EPC record across the building (45–207 m²). The building's EPC ratings span F to B across 29 units on file. The latest certificate (November 2025) shows a C (score 77), near the top of the C band. When first surveyed in December 2011 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Poor to Average and lighting went from Poor to Very Good; while hot-water efficiency dropped from Good to Average. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.

At 45 m² it sits well below the postcode median (134 m² across 28 EPCs), making it one of the more compact homes locally. Last changed hands 14 years ago, in April 2012. Across the public record there are 4 sales, relatively high churn for a single property. One planning record on file: an extension approved in 2018. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. Across 1997–2012, sale prices on this property compounded at 10.3% per year. Today's modelled estimate of £927,000 is 41.5% above the 2012 sale price. On a £-per-square-foot basis, the last sale (£1,352/sq ft) was about 410.6% above the typical sold price in the postcode.