12 Cowslips, Welwyn Garden City, AL7 2JJ

12 Cowslips is a one-bedroom semi-detached house in Welwyn Garden City (AL7 2JJ). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1983-1990 and council tax band B. The latest certificate (October 2025) shows a D (score 59), a step below the typical UK home. When first surveyed in January 2020 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Good, hot-water efficiency went from Very Poor to Poor and main heating went from Very Poor to Poor; while lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 76). Main heating runs on electricity. At 46 m² this is the 9th smallest of 13 units on EPC record in the building, where floor areas span 36–51 m². The building's EPC ratings span E to C across 13 units on file.

Held since August 2003 — that's 23 years off the open market, well above the local norm. Sale prices here have outpaced England HPI: 14.4% per year against 0% for the wider region. Today's modelled estimate of £202,000 sits 83.6% above the 2003 sale of £110,000. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count.