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 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

• 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

• 3 Allerton Street Grangetown Cardiff CF11 6SJ

  25/01303/FUL Submitted 5 Jun 2025 100 yards away

  91% historically approved · decision due ~15 Aug

  Commercial to residential accommodation use. Rebuild the existing outbuilding to the rear for use as amenity space to the existing domestic dwelling.

  Awaiting decision Full applications 14 docs
  Small domestic

• Tramshed Pendyris Street Grangetown Cardiff CF11 6QP

  22/02170/REM Submitted 14 Sep 2022 100 yards away

  Removal of Condition 1 of 21/01813/MJR to enable permanent permission for late night events

  Granted Amendments 5 docs

• 4 Dinas Street, Grangetown, Cardiff

  02/02545/R Submitted 18 Nov 2002 150 yards away

  REAR DORMER WINDOW

  Granted Householder Loft or dormer Windows or glazing
  Domestic

• 26/00786/HSE Granted

  1 Dogo Street Pontcanna Cardiff CF11 9JJ

  Replacement of existing garage roof, enlargement of garage door opening, and rebuilding of traditional stone rear garden wall.

  Received 20 Apr, published by the council 22 Jul 2026 Householder
• 26/01619/HSE Granted

  8 St Ina Road Heath Cardiff CF14 4LS

  Garage demolition, replaced with single storey extension linked to house

  Received 31 Jul, published by the council 6 Aug 2026 Householder
• 26/01492/HSE Granted

  24 Heol Stradling Whitchurch Cardiff CF14 1PW

  Demolish existing rear extension and construct new single storey extension

  Received 20 Jul, published by the council 6 Aug 2026 Householder
• 26/01755/HSE Granted

  70 Heol Nant Glandulas Lisvane Cardiff CF14 0AB

  Rear conservatory extension.

  Received 18 Aug, published by the council 24 Aug 2026 Householder
• 26/01410/HSE Granted

  85 Newfoundland Road Gabalfa Cardiff CF14 3LB

  Installation of a Air Source Heat Pump.

  Received 7 Jul, published by the council 22 Jul 2026 Householder