12a, Lower Market Street, Penryn, TR10 8BG

12a is a one-bedroom detached house in Penryn (TR10 8BG). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (August 2019) shows an E (score 51), well below the UK norm with real room to improve. When first surveyed in October 2008 the rating was F, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor. The recommended improvements would lift it to C (score 76), a 2-band jump. Main heating runs on electricity. At 51 m² this is the 12th smallest of 33 units on EPC record in the building, where floor areas span 31–170 m². The building's EPC ratings span F to C across 33 units on file.

It hasn't traded since June 1995, a hold of 31 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 £169,000 sits 281.5% above the 1995 sale of £44,300. On a £-per-square-foot basis, the last sale (£81/sq ft) was about 50.5% below the postcode norm.