TŶ GWYN Ffordd Cwmorthin, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3SN Data via plota.co.uk

C26/0377/03/DT - Householder Planning In Progress

Proposal

Estyniad Cefn arfaethedig ac addasiadau cysylltiedig Proposed rear extension and associated alterations Data via plota.co.uk

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View original council record ↗Last checked 7 Oct 2026, 10:44

Application progress

✓

Received

24 Jun 2026

Decision

Expected by 20 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 9 Oct 2026, from Gwynedd's recent extensions.

The consultation period closed on 6 Oct 2026.

Documents 16

Site constraints 6

World heritage site: World Heritage Site

Nationally designated heritage. Its significance and setting carry great weight.

Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.

Agricultural land, grade 5

Very poor quality farmland, not best and most versatile. Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. A site survey can differ.

Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.

Scheduled monument about 58 m away: Cwmorthin slate quarry, mine, railway and ancillary features

Its setting is a consideration for work nearby.

Nationally important archaeology protected by the Secretary of State. Work that affects the monument or its setting is rarely permitted.

Also on the record

National park about 186 m away: Snowdonia; Radon affected area, class 4; SSSI about 336 m away: Tan y Grisiau.

Not affected

Outside flood zones 2 and 3

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Important details

Council: Gwynedd
Application type: Householder Planning
Postcode: LL41 3SN
Received: 24 Jun 2026
Validated: 24 Jun 2026
Ward: Bowydd & Rhiw
Parish: Ffestiniog
Case officer: Show
Target decision: 20 Oct 2026
Decision level: Dirprwyedig / Delegated
Applicant: Show
Agent: Ty Architecture Cyf

Decision outlook

Day 107, past the statutory target. 54% of extensions in Gwynedd are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 7 Oct 2026.

target

predicted

Day 10751 days past the 56-day target

28%decided within 8 weeks

94%approved

248decided in the last year

Plota live figures for extensions decided by Gwynedd in the last twelve months, from validation. Gwynedd decision record →