18 Mardy Street Grangetown Cardiff CF11 6DA

1. 6 Aug 2025

   Received by Cardiff

2. 15 Aug 2025

   Validated

   Checked as complete and ready for consideration.

3. 2 Oct 2025

   Decision issued: Permission Granted

4. 22 Jul 2026

   Added to PlanIndex

Cardiff granted permission on 2 October 2025, 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.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 39 Clare Road Grangetown Cardiff CF11 6QP

  24/02123/FUL Submitted 4 Sep 2024 50 yards away

  Conversion of single dwelling into two separate flats. Rear dormer loft extension and single storey rear extension.

  Granted Full applications New dwelling Extension +1 18 docs
  Small domestic

• 30 Mardy Street Grangetown Cardiff CF11 6QU

  24/02403/FUL Submitted 9 Oct 2024 50 yards away

  Change of use of garage to grocery store with extension and alterations.

  Granted Full applications Extension 14 docs

• 30 Mardy Street Grangetown Cardiff CF11 6QU

  23/01526/FUL Submitted 3 Jul 2023 50 yards away

  Change of use of existing dwellinghouse (Use Class C3) to provide for religious education classes and short term guest accommodation, including extensions and alterations to ground floor, first and second floors.

  Granted Full applications Extension 25 docs
  Domestic

• 30 Clare Road Grangetown Cardiff CF11 6RS

  24/00378/FUL Submitted 16 Feb 2024 100 yards away

  Conversion/ Change of Use from existing shop to a studio flat with ground floor rear extension.

  Granted Full applications Extension 9 docs

• Builders Yard 12A Allerton Street Grangetown Cardiff CF11 6SJ

  20/02464/MNR Submitted 26 Nov 2020 100 yards away

  DEMOLITION OF EXISTING BUILDERS STORE / WORKSHOP AND ERECTION OF NEW DEVELOPMENT TO FORM 3 TERRACED DWELLINGS

  Withdrawn Full applications Demolition 30 docs

• 2 Dinas Street Grangetown Cardiff CF11 6QY

  24/02075/CLPUD Submitted 29 Aug 2024 100 yards away

  Rear dormer loft conversion.

  Granted Lawful development Loft or dormer 16 docs

• 26/02112/HSE Awaiting decision

  7 Penydarren Drive Whitchurch Cardiff CF14 2TT

  Proposed Single Storey Side/Rear Extension with Garage Conversion

  Received 7 Oct, published by the council 9 Oct 2026 Householder
• 26/02113/HSE Awaiting decision

  78 Mill Road Lisvane Cardiff CF14 0UG

  PROPOSED FIRST FLOOR EXTENSION AT SIDE OF HOUSE

  Received 7 Oct, published by the council 9 Oct 2026 Householder
• 26/01702/HSE Granted

  45 Gwern Rhuddi Road Cyncoed Cardiff CF23 6PS

  Two storey and single storey rear extensions (development similar to that as approved under 25/00533/HSE with additional first floor part).

  Received 10 Aug, published by the council 24 Aug 2026 Householder
• 26/02104/HSE Awaiting decision

  15 Brynteg Rhiwbina Cardiff CF14 6TS

  Proposed single storey rear extension to the existing semi-detached dwelling including minor internal and external modifications

  Received 6 Oct, published by the council 9 Oct 2026 Householder
• 26/02102/HSE Awaiting decision

  49 Kimberley Road Penylan Cardiff CF23 5DL

  Proposed ground floor rear side return extension

  Received 6 Oct, published by the council 9 Oct 2026 Householder