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Get started20 St Helens Street is a two-bedroom mid-terrace house in Caernarfon (LL55 2HU). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1900-1929 and council tax band A. Tenure is freehold. The latest certificate (April 2025) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since January 2013. Between certificates, roof efficiency went from Very Poor to Good and window efficiency went from Average to Good. The recommended improvements would lift it to B (score 91), a 2-band jump. Our model identifies extension potential, subject to local planning policy.
Sale prices here have outpaced England HPI: 4.7% per year against 0% for the wider region. Today's modelled estimate of £104,000 sits 57.6% above the 2015 sale of £66,000. On a £-per-square-foot basis, the last sale (£109/sq ft) was about 19.2% below the postcode norm. 11 years since the last transfer (October 2015).
Recommended upgrades on file would lift this property by multiple EPC bands.
Sale price has at least doubled since 1996.
£104,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.7% per year over 19 years.
£66,000
Growth on file: 4.7% per year over 19 years.
Price per m² for 20 St Helens Street lags the street by a wide margin.
Price per m²
£1,179
Street avg £1,736
Floor Area
56 m²
Street avg 58 m²
Habitable Rooms
3 rooms
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Roman Fort — bus stop.
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
Loft insulation installed or upgraded to 250mm+
Are we missing something? Tell us about home improvements to help adjust your valuation.
7 October 2015Most recent
£66,000
+1.0%over 7 years11 October 2007
£65,350
+138.5%over 11 years3 September 1996
£27,400
Median price across the last 5 sales in LL55 2HU: £129,995 (2024–2022).
Street avg 4 rooms
CO₂ Emissions
2.6 t/year
Street avg 3.4 t/year
LL55 2SS
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