1 Tanrallt Terrace, Llanllyfni, Caernarfon, LL54 6RR

1 Tanrallt Terrace is a three-bedroom end-of-terrace house in Llanllyfni, Caernarfon, Caernarfon (LL54 6RR). It has a recorded floor area of 76 m² (around 818 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (January 2015) shows a D (score 55), a step below the typical UK home. When first surveyed in September 2009 the rating was F, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Poor to Good and main heating went from Average to Good; while roof efficiency dropped from Average to Poor and lighting dropped from Good to Average. The recommended improvements would lift it to A (score 107), a 3-band jump. The latest certificate is from January 2015, so improvements made since then won't be reflected.

Held since July 2005 — that's 21 years off the open market, well above the local norm. Sale prices here have outpaced England HPI: 62.3% per year against 0% for the wider region. Today's modelled estimate of £164,000 is 36.7% above the 2005 sale price. One planning record on file: an extension approved in 2017. Past consents include an extension, meaningful when judging how the property has evolved. Its energy rating outperforms most of the postcode (better than 78% of similar EPCs).