36 Windermere Avenue Cyncoed Cardiff CF23 5PR

1. 7 Aug 2026

   Received by Cardiff

2. 13 Aug 2026

   Decision issued: Permission Granted

3. 13 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within five years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 113 Lake Road West Cyncoed Cardiff CF23 5PJ

  22/02900/HSE Submitted 2 Dec 2022 31m away

  Ground floor rear extension and conversion of roof space including construction of dormer roof extensions

  Granted Householder Extension Loft or dormer 13 docs
  Domestic

• 67 Windermere Avenue Cyncoed Cardiff CF23 5PS

  26/01131/HSE Submitted 2 Jun 2026 94m away

  Rear dormer and hip to gable roof.

  Refused Householder Loft or dormer 10 docs
  Domestic

• 89 Lake Road West Cyncoed Cardiff CF23 5PJ

  25/01612/CLPUD Submitted 10 Jul 2025 116m away

  New flat roof and external alterations to the rear elevation.

  Granted Lawful development 13 docs

• 44 Heath Mead Heath Cardiff CF14 3PJ

  22/02303/HSE Submitted 3 Oct 2022 139m away

  Demolition of Existing Single Storey Side/Rear Extension and the Erection of a Single Storey Side and Rear Extension. Insertion of Proposed Rooflights within the Front Elevation.

  Granted Householder Extension Loft or dormer +1 11 docs
  Small domestic

• 66 Windermere Avenue Cyncoed Cardiff CF23 5PS

  26/01833/HSE Submitted 28 Aug 2026 143m away

  92% historically approved · decision due ~23 Oct

  Proposed single-storey rear extension. Conversion of the roof space. Associated internal alterations and a new patio to the rear garden.

  Awaiting decision Householder Extension 20 docs
  Small domestic

• 2 Windermere Avenue Cyncoed Cardiff CF23 5PQ

  26/00694/CLPUD Submitted 7 Apr 2026 151m away

  Hip to gable Loft conversion with flat roof rear Dormer.

  Refused Lawful development Loft or dormer 10 docs

• 26/01705/CLPUD Granted

  390 Cyncoed Road Cyncoed Cardiff CF23 6SA

  Use of 390 Cyncoed Road as residential accommodation for up to six adults with mental health conditions, living together as a single household, with care and support provided by non-resident staff

  11 Aug 2026 Lawful development
• 26/01807/CLPUD Awaiting decision

  33 Blossom Drive Lisvane Cardiff CF14 0BE

  Proposed single storey rear extension and conversion of integral garage

  25 Aug 2026 Lawful development
• 26/01476/CLPUD Granted

  71 Llandennis Avenue Cyncoed Cardiff CF23 6JF

  Single storey extension to side and rear.

  16 Jul 2026 Lawful development
• 26/01662/CLEUD Granted

  2 Llantwit Street Cathays Cardiff CF24 4AJ

  Use of the property as four self-contained flats.

  5 Aug 2026 Lawful development
• 26/01775/CLEUD Awaiting decision

  62 Cottrell Road Roath Cardiff CF24 3EZ

  Use of the property as 2 residential care flats (Class C2).

  20 Aug 2026 Lawful development