Alltwen, Harlech has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 10 Jul 2020.

The property is not connected to mains gas and has partial double glazing. It is heated using electric storage heaters.

The most recent sale of Alltwen, Harlech completed on 29th July 2025 at £242,500 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have dropped by 25.2% over the period since July 2025.

• Sold Jul 2025£242,500
• Sold Mar 2021£145,000

Since 2007 84 properties similar to Alltwen, Harlech have sold within a radius of 5.8 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 8th April 2026, was Moelfre, Ystad Y Wenallt, Llanbedr, LL45 2PD, a freehold house which sold for £140,000.

Read more about house prices in LL46.

• Sold Apr 2026£140,000 | 2 Bed HouseMoelfre, Ystad Y Wenallt, Llanbedr, LL45 2PDMoelfre, Ystad Y Wenallt, Llanbedr, LL45 2PD
• Sold Mar 2026£220,000 | 3 Bed House5, Llwyn Y Gadair, Harlech, LL46 2RS5, Llwyn Y Gadair, Harlech, LL46 2RS
• Sold Dec 2025£238,000 | 3 Bed House7, Ystad Castell Morfa, Harlech, LL46 2GA7, Ystad Castell Morfa, Harlech, LL46 2GA
• Sold May 2025£212,700 | 3 Bed HouseBodelen, Llanbedr, LL45 2LEBodelen, Llanbedr, LL45 2LE
• Sold Mar 2025£220,000 | 3 Bed House2 Maes Y Llan, Llanbedr, LL45 2HL2 Maes Y Llan, Llanbedr, LL45 2HL
• Sold Aug 2024£220,000 | 3 Bed HouseAfallon, Llanbedr, LL45 2LEAfallon, Llanbedr, LL45 2LE
• Sold May 2024£225,000 | 2 Bed HouseNyth Bran, Harlech, LL46 2YTNyth Bran, Harlech, LL46 2YT
• Sold Feb 2024£250,000 | 3 Bed House1 Castle View, High Street, Harlech, LL46 2YE1 Castle View, High Street, Harlech, LL46 2YE
• Sold Feb 2024£265,000 | 3 Bed House32, Ystad Castell Morfa, Harlech, LL46 2GA32, Ystad Castell Morfa, Harlech, LL46 2GA
• Sold Jun 2023£202,750 | 3 Bed HouseFron Hyfryd, Harlech, LL46 2SGFron Hyfryd, Harlech, LL46 2SG
• Sold Jun 2023£180,000 | 3 Bed HouseAnnedd Bach, Harlech, LL46 2SGAnnedd Bach, Harlech, LL46 2SG
• Sold Feb 2022£305,000 | 3 Bed HouseSwyn Y Don, Harlech, LL46 2SBSwyn Y Don, Harlech, LL46 2SB
• Sold Feb 2022£235,000 | 2 Bed House1 Tan Rhiw, Harlech, LL46 2RR1 Tan Rhiw, Harlech, LL46 2RR
• Sold Oct 2021£220,000 | 3 Bed HouseWest Ridge, Fron Hill Estate, Harlech, LL46 2TDWest Ridge, Fron Hill Estate, Harlech, LL46 2TD
• Sold Nov 2020£155,000 | 3 Bed HouseIsfryn, Llanbedr, LL45 2LEIsfryn, Llanbedr, LL45 2LE
• Sold Feb 2018£145,000 | 3 Bed House1 Pant Golau, Llanbedr, LL45 2HS1 Pant Golau, Llanbedr, LL45 2HS
• Sold Apr 2017£175,000 | 3 Bed HouseBryn Aber, Bronfair Estate, Harlech, LL46 2RPBryn Aber, Bronfair Estate, Harlech, LL46 2RP
• Sold Feb 2012£137,500 | 3 Bed House11, Llwyn Y Gadair, Harlech, LL46 2RS11, Llwyn Y Gadair, Harlech, LL46 2RS
• Sold Jul 2011£170,000 | 3 Bed House12, Llwyn Y Gadair, Harlech, LL46 2RS12, Llwyn Y Gadair, Harlech, LL46 2RS
• Sold Jul 2007£100,000 | 3 Bed HouseTrem Artro, Bronfair Estate, Harlech, LL46 2RPTrem Artro, Bronfair Estate, Harlech, LL46 2RP

Of the 75 addresses on Llanfair, Harlech, LL46, Alltwen, Harlech comes out as the 64th largest and the 68th most expensive in our analysis of the public data.

It is also £17k less expensive than the average property across the LL46 district.

• Llandanwg

  |

  800 m away
• Pensarn (Gwynedd)

  |

  1.0 km away
• Llanbedr

  |

  2.1 km away

The flood risk here is rated Very Low, based on Environment Agency data.