3 Treherbert Street Cathays Cardiff CF24 4JN

1. 21 Dec 2022

   Received by Cardiff

2. 10 Jan 2023

   Validated

   Checked as complete and ready for consideration.

3. 15 May 2023

   Decision issued: Permission Granted

4. 22 Sep 2026

   Added to PlanIndex

Cardiff granted permission on 15 May 2023, subject to any conditions on the decision notice. Work must normally begin within five years or the permission lapses. More in our guide to what happens after a planning decision.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• 19 Treherbert Street Cathays Cardiff CF24 4JN

  26/01363/CLEUD Submitted 1 Jul 2026 50 yards away

  Use of the property as a Sui Generis House in Multiple Occupation (HMO).

  Granted Lawful development 5 docs

• 17 Treorky Street Cathays Cardiff CF24 4JP

  25/02997/HSE Submitted 29 Dec 2025 50 yards away

  Rear extension and dormer loft conversion.

  Granted Householder Extension Loft or dormer 7 docs
  Domestic

• 12 Merthyr Street Cathays Cardiff CF24 4JJ

  23/00046/CLD Submitted 9 Jan 2023 100 yards away

  GROUND FLOOR REAR EXTENSION AND DORMER LOFT CONVERSION TO EXISTING CLASS C4 HOUSE IN MULTIPLE OCCUPATION

  Granted Lawful development Extension Loft or dormer 7 docs

• 6B Merthyr Street Cathays Cardiff CF24 4JJ

  26/00978/CLEUD Submitted 11 May 2026 100 yards away

  Use of the property as two self-contained flats.

  Granted Lawful development New dwelling 10 docs

• 15 Hirwain Street Cathays Cardiff CF24 4JG

  20/01911/DCH Submitted 24 Sep 2020 100 yards away

  REAR SINGLE STOREY EXTENSION

  Granted Householder Extension 6 docs
  Small domestic

• 103 Cathays Terrace Cathays Cardiff CF24 4XQ

  20/00136/MNR Submitted 21 Jan 2020 100 yards away

  DISCHARGE OF CONDITIONS 5 (SOUND INSULATION) AND 8 (EXTRACTION DETAILS) OF 19/02219/MNR

  Withdrawn Conditions 7 docs

• 26/01337/FUL Granted

  37 Wyeverne Road Cathays Cardiff CF24 4BG

  Extensions and alterations and change of use from dwelling (C3) to House in Multiple Occupation (C4) (HMO).

  Received 26 Jun, published by the council 22 Jul 2026 Full applications
• 26/01728/FUL Granted

  Unit 7b Cardiff Industrial Park Pennine Close Llanishen Cardiff CF14 5DN

  Installation of 5 no. external air source heat pump units

  Received 13 Aug, published by the council 24 Aug 2026 Full applications
• 26/01729/FUL Granted

  Unit 7b Cardiff Industrial Park Pennine Close Llanishen Cardiff CF14 5DN

  Replacement roller shutter.

  Received 13 Aug, published by the council 24 Aug 2026 Full applications
• 26/01216/FUL Granted

  4 Callaghan Square Butetown Cardiff CF10 5BT

  Internal and external alterations to an existing office building at ground floor and part first floor

  Received 12 Jun, published by the council 22 Jul 2026 Full applications
• 26/02099/FUL Awaiting decision

  20 Janet Street Splott Cardiff CF24 2BD

  Proposed conversion of dwelling to form two flats

  Received 5 Oct, published by the council 9 Oct 2026 Full applications