12a, Reddown Road, Coulsdon, CR5 1AX

12a is a three-bedroom end-of-terrace house in Coulsdon (CR5 1AX). It has a recorded floor area of 36 m² (around 388 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (October 2022) shows a D (score 55), a step below the typical UK home. When first surveyed in December 2010 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good and lighting went from Average to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 73). Main heating runs on electricity. At 36 m² this is the 6th smallest of 31 units on EPC record in the building, where floor areas span 29–192 m². The building's EPC ratings span F to B across 31 units on file. Other recorded features include a conservatory.

It hasn't traded since December 2000, a hold of 25 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £502,000 sits 223.9% above the 2000 sale of £155,000. On a £-per-square-foot basis, the last sale (£400/sq ft) was about 55.4% above the typical sold price in the postcode. At 36 m² it sits well below the postcode median (85 m² across 30 EPCs), making it one of the more compact homes locally.