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Get started3 Trewen is a three-bedroom mid-terrace house in Groeslon, Caernarfon, Caernarfon (LL54 7SY). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (August 2024) shows a C (score 70). When first surveyed in April 2019 the rating was F, the property has climbed 3 bands since. Between certificates, hot-water efficiency went from Average to Good and main heating went from Very Poor to Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to B (score 83). Other recorded features include a conservatory and outbuildings.
Sale prices here have outpaced England HPI: 6.8% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£198/sq ft) was about 97.5% above the typical sold price in the postcode. Most recent transfer was May 2025 at £175,000 — fresh data.
3 Trewen valuation sits well clear of the typical sold price in this postcode.
£184,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.8% per year over 6 years.
£175,000
Growth on file: 6.8% per year over 6 years.
3 Trewen outperforms the street on price per m² by a wide margin.
Price per m²
£2,134
Street avg £1,327
Floor Area
82 m²
Street avg 84 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Bryn Neaudd — bus stop.
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Are we missing something? Tell us about home improvements to help adjust your valuation.
9 May 2025Most recent
£175,000
+45.8%over 5 years19 August 2019
£120,000
Median price across the last 5 sales in LL54 7SY: £107,000 (2021–2002).
CO₂ Emissions
3.0 t/year
Street avg 3.2 t/year
LL54 7ET
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