9 St Marys Terrace, Arthog, LL39 1BQ
About 9 St Marys Terrace
9 St Marys Terrace is an end-of-terrace house in Arthog (LL39 1BQ). It has a recorded floor area of 140 m² (around 1507 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (March 2025) shows an F (score 30), near the bottom of the EPC scale. The rating has held steady at F across 2 certificates since October 2014. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would lift it to D (score 63), a 2-band jump. Main heating runs on oil.
A recent sale: £170,000 in April 2025. At 140 m² it's 21.4% larger than the typical home in the postcode (115 m² median across 7 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Today's modelled estimate of £215,000 is 26.5% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£113/sq ft) was about 21.1% below the postcode norm. One historical planning record sits against the property in 2025.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
9 St Marys Terrace's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Planning history
- May 2025MixedFullIn report
Dymchwel y lolfa haul presennol, newidiadau i'r estyniad ochr presennol i greu to fflat gyda ffenestr yn y to, tynnu ffenestr llawr cyntaf ar yr edrychiad ochr, gosod ffenestr newydd ar yr edrychiad ochr ar lefel y llawr atig, ffenestr gromen newydd i'r edrychiad blaen, newidiadau i ffenestr yr edrychiad cefn ar y llawr cyntaf i ffurfio balconi juliet gyda drysau dwbl a newidiadau i wal ffin y blaen ac ochr i greu un lle parcio oddi ar y stryd. Demolition of existing conservatory, alteration of existing side extension to create flat roof with rooflight, removal of existing first floor window to the side elevation, insertion of a new window to the side elevation at attic floor level, new dormer window to front elevation, alteration of the existing first floor rear elevation window to form a juliet balcony with double doors and alterations to the front and side boundary wall to form one off street parking space.
- Reference
- C25/0393/01/DT
What's in 9 St Marys Terrace, Arthog, LL39 1BQ's planning history?
Refusals, disputes and full decisions on this property and nearby, in the report.
Sales history & valuation
9 St Marys Terrace's sale-price growth has lagged the wider UK trajectory across its history on file.
£215,000
Modelled from EPC, postcode comparables and a sale-price growth of -0.1% per year over 18 years.
£170,000
Growth on file: -0.1% per year over 18 years.
Sales timeline
10 April 2025Most recent
£170,000
-1.4%over 18 years1 December 2006
£172,500
Median price across the last 5 sales in LL39 1BQ: £245,000 (2024–2021).
Everything we know about 9 St Marys Terrace, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus the street
9 St Marys Terrace is notably below the street on price per m².
Price per m²
£1,214
Street avg £2,623
Floor Area
140 m²
Street avg 115 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
14.0 t/year
Street avg 11.2 t/year
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Morfa Mawddach Rail Station — railway station.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.