18 Llwyn Gwalch, Morfa Nefyn, Pwllheli, Gwynedd, LL53 6DE Data via plota.co.uk

C26/0026/42/DT - Householder Planning Approved

Proposal

Estyniad unllawr cefn Single storey rear extension Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
16 Jan 2026
✓
Approved
14 Apr 2026

Approved on 14 Apr 2026 · Dirprwyedig / Delegated · Last checked 1 Oct 2026

Site constraints 4

Special area of conservation about 204 m away: Clogwyni Pen Llyn / Seacliffs of Lleyn
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
SSSI about 204 m away: Porth Dinllaen i Borth Pistyll
Natural England may need consulting, depending on what is proposed.
Sites of special scientific interest are the best wildlife and geological sites in the country. Development likely to harm one is rarely permitted.
Also on the record
Radon affected area, class 4; National landscape about 398 m away: Llyn.
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site

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.

Building

Floor area85 m² (915 sq ft)
Energy ratingD (63 out of 100), could reach C
PropertySemi-detached bungalow, 4 habitable rooms
Built1976 to 1982
HeatingElectric storage heaters
WallsCavity wall, filled cavity

From the energy performance certificate lodged in October 2025, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Gwynedd
Application type
Householder Planning
Postcode
LL53 6DE
Received
16 Jan 2026
Validated
16 Jan 2026
Ward
Morfa Nefyn a Thudweiliog
Parish
Nefyn
Case officer
Show
Target decision
3 Apr 2026
Decision
Approved with Conditions
Decision date
14 Apr 2026
Decision level
Dirprwyedig / Delegated
Applicant
Show
Agent
Cynad Ltd

How this decision compares

Decided in 88 days from validation, about the council's usual 85 days. Approved, as 94% of extensions here are.

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 →

Consultation & key dates

Comments by
17 Feb 2026
Statutory expiry
3 Apr 2026

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.