31 Theobald Road Canton Cardiff CF5 1LP

1. 5 May 2021

   Received by Cardiff

2. 6 May 2021

   Validated

   Checked as complete and ready for consideration.

3. 14 Jun 2021

   Decision issued: Permission Granted

4. 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

• 31 Theobald Road Canton Cardiff CF5 1LP

  21/01141/DCH Submitted 5 May 2021 0m away

  SINGLE STOREY REAR EXTENSION

  Granted Householder Extension 11 docs
  Small domestic

• 30 Hanover Street Canton Cardiff CF5 1LS

  21/00373/MNR Submitted 15 Feb 2021 72m away

  CONVERSION OF 3 BEDROOM HOUSE INTO 2NO. FLATS

  Granted Full applications New dwelling 18 docs
  Several homes

• 32 Alexandra Road Canton Cardiff CF5 1NU

  21/01409/DCH Submitted 2 Jun 2021 130m away

  DEMOLITION OF EXISTING REAR EXTENSION AND ERECTION OF A SINGLE STOREY EXTENSION

  Granted Householder Extension Demolition 6 docs
  Small domestic

• 39 Northumberland Street, Canton, Cardiff

  03/01037/R Submitted 7 May 2003 136m away

  SINGLE STOREY EXTENSION TO REAR OF PROPERTY COMPRISING OF SHOWER ROOM AND UTILITY ROOM

  Granted Householder Extension
  Small domestic

• 2 Alexandra Road Canton Cardiff CF5 1NS

  26/00531/HSE Submitted 17 Mar 2026 181m away

  Ground floor side return extension and rear dormer roof extension with external works.

  Granted Householder Extension Loft or dormer 7 docs
  Domestic

• 321 Cowbridge Road East Canton Cardiff CF5 1JD

  21/01512/MNR Submitted 16 Jun 2021 188m away

  CHANGE OF USE TO D1 - (PODIATRY CLINIC)

  Granted Full applications 5 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