TRESDDOLEN, 23 Ffordd Cadfan, Tywyn, Gwynedd, LL36 9EE

1. 1 Jun 2026

   Received by Gwynedd

2. 6 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 27 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

The published feed does not show a live status for this application, which usually means the council register holds more recent detail than the copy PlanIndex receives.

The council portal linked on this page carries the authoritative version, including the documents, any consultation deadline and the decision once made. PlanIndex refreshes its copy of the register on a daily cycle.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• Site Off: Assembly Terrace, North Of Corbet Lodge, Brook Street, Tywyn, LL36 9DP

  C26/0120/09/AC Submitted 24 Feb 2026 155m away

  Decision due ~21 Apr

  Cais i ddiwygio amod 2(cynlluniau cymeradwy) o ganiatâd cynllunio(C24/0355/09/LL) / Application to amend condition 2(approved plans) of planning permission(C24/0355/09/LL)

  Status unknown Amendments

• Cyngor Gwynedd, PENYBRYN SCHOOL Ffordd Cadfan, Tywyn, Gwynedd, LL36 9EF

  C26/0355/09/LL Submitted 15 Jun 2026 190m away

  Decision due ~10 Aug

  Cais i waredu y rheiliau metel du presennol a gostwng y pileri brics presennol i lefel y wal derfyn garreg. Gosod ffens ddiogelwch weldmesh newydd 6 troedfedd (tua 1.8m) o uchder ar ben y wal is sy’n weddill er mwyn gwella diogelwch ffin. Application for removal of existing black metal railings and reduction of existing brick pillars down to the level of the lower stone boundary wall. Installation of a new 6-foot (approx. 1.8m) weldmesh security fence mounted on top of the remaining lower wall to enhance boundary security.

  Status unknown Full applications
  Small domestic

• 4, PENDRE GARDENS Brook Street, Tywyn, Gwynedd, LL36 9DS

  C25/0593/09/LL Submitted 19 Aug 2025 218m away

  Adeiladu annedd sengl (dosbarth defnydd C3) Erection of single dwelling (C3 use class)

  Granted Full applications
  Domestic

• 1 Bryn Y Paderau Estate, Tywyn, Gwynedd, LL36 9LA

  C26/0273/09/DT Submitted 1 May 2026 222m away

  Decision due ~26 Jun

  Estyniad un llawr i gefn yr eiddo. Single storey extension to rear of property.

  Status unknown Householder Extension
  Small domestic

• HEDDWCH, 3 Bryn Y Paderau Estate, Tywyn, Gwynedd, LL36 9LA

  C26/0242/09/DT Submitted 17 Apr 2026 222m away

  Decision due ~12 Jun

  CAIS I GREU ESTYNIADAU AR GEFN AC OCHR YR EIDDO. GOSTWNG UCHDER Y SILIAU I DRI O'R FFENESTRI LLOFFT. YCHWANEGU DWY FFENEST GROMEN I DDRYCHIAD BLAEN YR EIDDO. CODI YSTAFELL ARDD YN NGHORNEL GOGLEDD DDEHEUOL YR ARDD / APPLICATION FOR SIDE AND REAR EXTENSIONS. LOWER THE HEIGHT OF THE WINDOW SILLS TO THREE OF THE BEDROOMS. INSTALLATION OF TWO DORMER WINDOWS TO THE PRINCIPAL ELEVATION. ERECTION OF A GARDEN ROOM IN THE NORTH EASTERN CORNER OF THE GARDEN

  Status unknown Householder Extension Loft or dormer +1
  Small domestic

• OLD BAKERY COTTAGE High Street, Tywyn, Gwynedd, LL36 9AE

  C26/0250/09/TC Submitted 20 Apr 2026 317m away

  Decision due ~15 Jun

  Cais am Dystysgrif Datblygiad Cyfreithlon ar gyfer Defnydd presennol cyn Fecws yn dy annedd (Dosbarth Defnydd C3) Application for a Lawful Development Certificate for the existing use of a former Bakery as a dwelling house (C3 Use Class)

  Status unknown Lawful development
  Domestic

• C26/0377/03/DT Status unknown

  TŶ GWYN Ffordd Cwmorthin, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3SN

  Estyniad Cefn arfaethedig ac addasiadau cysylltiedig Proposed rear extension and associated alterations

  24 Jun 2026 Householder
• C26/0373/39/DT Status unknown

  Tawelfa, Llwyn Onn Estate, Abersoch , LL53 7EP

  Cais am addasiadau ac estyniadau i ailfodelu'r annedd bresennol drwy:- estyniad ochr a chefn, addasiadau i'r to i greu llety ar y llawr cyntaf a gwelliannau effeithlonrwydd ynni i'r rhannau o'r tŷ sy'n cael eu cadw. Application for alterations and extensions to remodel the existing dwelling through:- side and rear extension, roof alterations to create first floor accommodation and energy efficiency upgrades to the parts of the house being retained.

  23 Jun 2026 Householder
• C26/0365/09/DT Status unknown

  11 Corbett Close, Tywyn, Gwynedd, LL36 0BL

  Cais am estyniad llawr daear a llawr cyntaf i gynnwys balconi / Application for a ground and first floor extension to dwelling including balcony

  19 Jun 2026 Householder
• C26/0364/42/DT Status unknown

  HAFAN WEN Lôn Golff, Morfa Nefyn, Pwllheli, Gwynedd, LL53 6DA

  Estyniad ochr llawr cyntaf ac estyniad llawr isaf unllawr. First floor side extension and ground floor single storey extension.

  18 Jun 2026 Householder
• C26/0354/14/DT Status unknown

  BRYN MÔR England Road North, Caernarfon, Gwynedd, LL55 1HS

  New first floor balcony to front of property along with new glazed doors. Balconi newydd ar y llawr cyntaf ar flaen yr eiddo ynghyd â drysau gwydr newydd.

  15 Jun 2026 Householder