23 Bontuchaf, Carneddi, Bethesda, Bangor, LL57 3SN

23 Bontuchaf is a mid-terrace house in Bethesda, Bangor, Bangor (LL57 3SN). It has a recorded floor area of 53 m² (around 570 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (December 2025) shows an F (score 29), near the bottom of the EPC scale. Earlier certificates rated it D (August 2018); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Good to Very Poor and lighting dropped from Very Good to Good. The recommended improvements would lift it to C (score 79), a 3-band jump. Main heating runs on to be used only when there is no heating/hot. This certificate was lodged in the last six months, so the rating reflects current condition.

It hasn't traded since November 1996, a hold of 30 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 £112,000 sits 300.7% above the 1996 sale of £27,950. On a £-per-square-foot basis, the last sale (£49/sq ft) was about 68.9% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 89% of similar EPCs).