8 Celyn Avenue Cyncoed Cardiff CF23 6EN

1. 22 Sep 2026

   Received by Cardiff

2. 6 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 17 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Cardiff took a median of 56 days over the applications it decided in the last year.

This application is with Cardiff for determination, against a statutory target of eight weeks. Over the last year Cardiff decided lawful development applications in a median of 22 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 6 Celyn Avenue Cyncoed Cardiff CF23 6EN

  25/00681/HSE Submitted 19 Mar 2025 50 yards away

  Two storey side and rear extensions, with rear dormer roof extension.

  Granted Householder Extension Loft or dormer 9 docs
  Domestic

• 7 Celyn Avenue Cyncoed Cardiff CF23 6EH

  23/02280/HSE Submitted 29 Sep 2023 50 yards away

  Part single, part double story side and rear extension with rear dormer loft conversion and demolition of existing garage.

  Granted Householder Extension Loft or dormer +1 10 docs
  Domestic

• 11 Celyn Avenue Cyncoed Cardiff CF23 6EH

  25/02809/HSE Submitted 27 Nov 2025 50 yards away

  Ground and first floor rear extension, rear dormer loft conversion and new entrance porch with external alterations.

  Granted Householder Extension Loft or dormer 16 docs
  Small domestic

• 8 Lakeside Drive Cyncoed Cardiff CF23 6DD

  26/01740/HSE Submitted 17 Aug 2026 100 yards away

  93% historically approved · decision due ~12 Oct

  Demolition of garage. Double storey side extension, single storey side extension, rear first floor balcony. External chimney and chimney breast to be demolished.

  Awaiting decision Householder Extension Demolition 34 docs
  Small domestic

• 12 Lakeside Drive Cyncoed Cardiff CF23 6DD

  26/00024/HSE Submitted 7 Jan 2026 100 yards away

  Part single-storey and part double-storey side and rear extension, including external works.

  Granted Householder Extension 9 docs
  Small domestic

• 1 Leven Close Lakeside Cardiff CF23 6DN

  21/01958/DCH Submitted 4 Aug 2021 150 yards away

  TWO STOREY SIDE EXTENSION

  Granted Householder Extension 6 docs
  Domestic

• 26/01578/CLPUD Granted

  207 Fidlas Road Llanishen Cardiff CF14 5NA

  Proposed ancillary garden building

  Received 28 Jul, published by the council 6 Oct 2026 Lawful development
• 26/02084/CLPUD Awaiting decision

  24 Bassetts Field Rhiwbina Cardiff CF14 9UG

  Proposed single storey flat roof extension to rear

  Received 2 Oct, published by the council 6 Oct 2026 Lawful development
• 26/02050/CLPUD Awaiting decision

  First And Second Floor 85 Romilly Crescent Pontcanna Cardiff CF11 9NQ

  Change of use from Residential to C6 short-term let.

  Received 25 Sep, published by the council 6 Oct 2026 Lawful development
• 26/02053/CLPUD Awaiting decision

  32 Homelands Road Heath Cardiff CF14 1UJ

  Single storey rear extension.

  Received 24 Sep, published by the council 6 Oct 2026 Lawful development
• 26/01863/CLPUD Granted

  6 Llandennis Green Cyncoed Cardiff CF23 6JX

  Proposed conversion of existing integral garage to ancillary domestic accommodation, including minor internal alterations

  Received 4 Sep, published by the council 22 Sep 2026 Lawful development