10, Isgraig, LL49 9PT

10 Isgraig is a 84 m² / 904 sq ft terraced home in Porthmadog. It sold for £135,000 in January 2025. Indexed forward to today's value, that sale is roughly £140k. Recent local prices imply a broad valuation context of £144k to £259k based on its internal area. The Land Registry and EPC data was last updated 2 July 2026.

Property data
Sale history
£135,000 on Jan 2025

*This price paid record has been flagged by Land Registry as a 'Category B: Additional Price Paid entry'. This could be due to a variety of reasons, such as the sale being a buy-to-let purchase, a repossession or a transfer to a limited company. When Land Registry suspects that a sale does not reflect full market value (e.g. part-ownership or right to buy), these transactions can be flagged as well. For this reason, we exclude them from our area statistics.

Internal area
84 square metres (904 square feet) according to latest EPC inspection
Price per internal area

This property sold for £1,607 per square metre (£149 per square foot) in Jan 2025. Indexed forward to today's value, this is roughly £1,664 per square metre (£155 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Jan 2025 £135,000 £1,607 £139,785 £1,664

Calculated using the latest EPC internal area of 84 m². Earlier sale dates may not have had the same measured area available.

Valuation
The most recent sale price indexed forward to today's value is £139,785. This is one data point to inform the valuation. Another method is the valuation implied by what comparable homes are selling for. Homes in Porthmadog are now selling for between £1,710 and £3,080 per square metre (£158 and £286 per square foot). Based on an internal area of 84 m², this implies a valuation between £144,000 and £259,000. Treat this as context only. For a valuation using hand-picked comparable sales, use the Advanced search tool — create a shortlist of similar condition homes, then export a valuation report.
Bedrooms
3
Type
Terrace
Council tax band
B
Plot size
106 square metres (1,141 square feet) - map showing freehold boundary lines
Company ownership
Title number
WA210450
Tenure
Freehold
Title address
10 Isgraig, Tremadog, Porthmadog
Owner
CYNGOR GWYNEDD
Proprietor address: Council Offices, Caernarfon, Gwynedd LL55 1SH
Price paid on title: £135,000
Ownership record added to Land Registry's corporate ownership dataset 24 Jan 2025
EPC Inspections
Summary:
18 December 2025 - energy performance certificate grade C
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Rental
Tenure:
Social rental
Property type:
Mid-Terrace House , has 4 habitable rooms. Estimated year built 1950 to 1966
Area:
83 sqm (893 square foot) total internal area
Comments:
Walls: Cavity wall, filled cavity. Roof: Pitched, 200 mm loft insulation. Heating: Boiler and radiators, mains gas.
Summary:
10 March 2020 - energy performance certificate grade C
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Rental
Tenure:
Owner-occupied
Property type:
Mid-Terrace House , has 5 habitable rooms. Estimated year built 1950 to 1966
Area:
84 sqm (904 square foot) total internal area
Comments:
Walls: Cavity wall, filled cavity. Roof: Pitched, 250 mm loft insulation. Heating: Boiler and radiators, mains gas.
Summary:
25 May 2010 - energy performance certificate grade C
Reason for EPC:
None
Tenure:
Owner-occupied
Property type:
None , has 4 habitable rooms. Estimated year built 1950 to 1966
Area:
84 sqm (904 square foot) total internal area
Comments:
Summary:
19 April 2010 - energy performance certificate grade F
Reason for EPC:
None
Tenure:
Owner-occupied
Property type:
None , has 4 habitable rooms. Estimated year built 1950 to 1966
Area:
84 sqm (904 square foot) total internal area
Comments:
Frequently asked questions

10 Isgraig is worth whatever price a willing buyer and seller agree upon. However, the following can provide useful context.

  • HouseMetric estimates the most recent sale price indexed forward to today's value is £139,785.
  • Based on an internal area of 84 m² and recent prices in Porthmadog, this implies a lower and upper quartile range from £144,000 to £259,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, 10 Isgraig last sold for £135,000 in January 2025.

HouseMetric shows 10 Isgraig as 84 m² (904 sq ft), based on the latest internal area data available for this property. The bedroom count is shown as 3 bedrooms. Bedroom numbers can come from a previous estate agency listing, an EPC record, or an estimate based on the size of the property.

The latest EPC rating shown by HouseMetric is C, from an inspection dated 18 December 2025. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, 10 Isgraig was in council tax band B. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

10 Isgraig is in postcode LL49 9PT, in Porthmadog. You can also view HouseMetric's sold-price page for Isgraig, LL49 9PT or analysis of the Porthmadog property market.

HouseMetric combines HM Land Registry price paid data, Energy Performance Certificate data and Ordnance Survey/open data. The data were last updated 2 July 2026. Figures such as indexed values and local valuation ranges are calculated estimates for context, while official records can change as public datasets are updated.

For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.