Our Data Sources
Tan Y Dderwen, Caernarfon has no records in the the Land Registry and a single entry in the EPC database dated July 2025.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 0 out of 5 and is considered of low accuracy.
Plot Size
According to data from HM Land Registry, Tan Y Dderwen, Caernarfon sits on a plot of 258 m2.
We have plot size data on 17 out of 23 other houses in the postcode and Tan Y Dderwen, Caernarfon sits on the 14th largest plot.
Energy Efficiency
Tan Y Dderwen, Caernarfon has an Energy Performance Rating (EPC) of G. This is based on the most recent assessment, dated 08 Jul 2025.
The property is not connected to mains gas and has some double glazing. It is heated using Portable electric heating assumed for most rooms.
Properties Sold Nearby
According to the Land Registry and our network of Estate Agents, there have been 654 property sales within 6.6 kilometres of Tan Y Dderwen, Caernarfon over the last 2 years.
The most recent example is Terfyn, Caernarfon, LL55 4UL, a freehold house which sold for £233,000 on the 26th April 2022.
Read more about house prices in LL55.
- Sold Apr 2022£233,000 | 3 Bed HouseTerfyn, Caernarfon, LL55 4ULTerfyn, Caernarfon, LL55 4UL
- Sold Jul 2010£127,000 | 3 Bed House4, Nant Ffynnon, Caernarfon, LL55 4UG4, Nant Ffynnon, Caernarfon, LL55 4UG
- Sold Nov 2008£117,500 | 3 Bed House3, Nant Ffynnon, Caernarfon, LL55 4UG3, Nant Ffynnon, Caernarfon, LL55 4UG
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Schools Nearby
Public Transport Nearby
- Roman Bridge|11.6 km away
- Dolwyddelan|13.5 km away
- Pont-y-Pant|14.4 km away
Risk of Flooding
According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.







