31 Mardy Street Grangetown Cardiff CF11 6QU

1. 19 Jul 2021

   Received by Cardiff

2. 17 Sep 2021

   Decision issued: Permission Granted

3. 22 Sep 2026

   Added to PlanIndex

Cardiff granted permission on 17 September 2021, 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.

• 47 Mardy Street Grangetown Cardiff CF11 6QU

  22/01547/MNR Submitted 19 Jul 2022 50 yards away

  CONVERSION OF PROPERTY USE FROM C3 TO 7 BEDROOM HOUSE IN MULTIPLE OCCUPATION

  Granted Full applications 16 docs

• 91 Clare Road Grangetown Cardiff CF11 6QQ

  25/01204/FUL Submitted 28 May 2025 100 yards away

  Change of use from C3 to five person HMO (C4).

  Granted Full applications 11 docs

• 39 Dinas Street Grangetown Cardiff CF11 6QZ

  21/01918/DCH Submitted 29 Jul 2021 100 yards away

  REAR DORMER ROOF EXTENSION

  Granted Householder Extension Loft or dormer 13 docs
  Domestic

• 82 Mardy Street Grangetown Cardiff CF11 6QW

  22/02573/HSE Submitted 31 Oct 2022 100 yards away

  Proposed ground floor single storey rear and side extension, and proposed dormer roof extension and porch

  Refused Householder Extension Loft or dormer 15 docs
  Small domestic

• 82 Mardy Street Grangetown Cardiff CF11 6QW

  25/02439/HSE Submitted 21 Oct 2025 100 yards away

  93% historically approved · decision due ~25 Mar

  Proposed ground floor single storey rear and side extension.

  Awaiting decision Householder Extension 14 docs
  Small domestic

• Lyndon Social Club & Institute 109-111 Clare Road Grangetown Cardiff CF11 6QR

  21/00925/MNR Submitted 14 Apr 2021 100 yards away

  SIDE DORMER ROOF EXTENSION AND REAR FLAT ROOF EXTENSION

  Granted Full applications Extension Loft or dormer 20 docs

• 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