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Planning application

55 Rhymney Street Cathays Cardiff CF24 4DH

Granted Cardiff 26/00836/FUL Full Planning Permission

Works: Extension Loft or dormer

Permission granted. Work must normally begin within five years of the decision or the permission lapses.

Proposal

Change of Use to Class C4 House in Multiple Occupation with rear and side extensions and a rear dormer roof extension.

As published by the council, reference 26/00836/FUL

Application record

Reference
26/00836/FUL
Type
Full Planning Permission
Status
Decided
Decision
Permission Granted
Received
28 Apr 2026
Validated
28 Apr 2026
Decided
18 Aug 2026
Ward
CATHAYS
Decision by
Chair (1- 5 Reps)
Postcode
CF24 4DH

Timeline

Dates from the published record

  1. 28 Apr 2026

    Received by Cardiff

  2. 22 Jul 2026

    Added to PlanIndex

  3. 6 Aug 2026

    Status changed to Awaiting decision

    Previously Registered.

  4. 18 Aug 2026

    Decision issued: Permission Granted

Who's behind it

Company information only, from the register and Companies House

DTB DESIGN Agent, a design practice

25 applications on PlanIndex · across 3 councils · 59% granted

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Documents

Plans, drawings, consultee responses and the officer's report

8 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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What this grant of permission means

Cardiff granted permission on 18 August 2026, 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.

About full applications

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.

Nearby applications

Within 500 metres

  • 57 Rhymney Street Cathays Cardiff CF24 4DH

    26/00959/FUL Submitted 12 May 2026 4m away

    Change of use to class C4 House in Multiple Occupation (HMO) with rear extensions and dormer loft conversion.

    Withdrawn Full applications Extension Loft or dormer 7 docs

  • 51 Rhymney Street Cathays Cardiff CF24 4DH

    25/01660/FUL Submitted 16 Jul 2025 10m away

    Ground floor rear extension plus rear dormer loft extension and conversion to class C4 House in Multiple Occupation.

    Granted Full applications Extension Loft or dormer 9 docs

  • 28 Coburn Street Cathays Cardiff CF24 4BS

    21/01175/DCH Submitted 10 May 2021 32m away

    SMALL INCREASE TO WIDTH TO EXISTING 2 STOREY REAR PROJECTION, 2 VELUX ROOFLIGHTS, WIDEN EXISTING REAR PATIO DOOR AND REMOVAL OF EXISTING CHIMNEY

    Granted Householder Loft or dormer 9 docs
    Domestic

  • 42 Rhymney Street Cathays Cardiff CF24 4DG

    26/00898/FUL Submitted 6 May 2026 57m away

    Demolition and partial reduction of rear extension; erection of rear dormer roof extension; and internal alterations to facilitate the change of use from a dwellinghouse (C3) to a 6-bedroom House in Multiple Occupation (C4)

    Granted Full applications Extension Loft or dormer +1 8 docs
    Domestic

  • 81 Rhymney Street Cathays Cardiff CF24 4DH

    23/00354/CLU Submitted 15 Feb 2023 58m away

    Existing Use as a 6 bed House in Multiple Occupation (HMO)

    Granted Lawful development 8 docs

  • 11 Coburn Street Cathays Cardiff CF24 4BQ

    26/00313/CLPUD Submitted 13 Feb 2026 66m away

    Erection of ground floor rear extension, rear dormer roof extension and addition of rooflight to the front roof elevation

    Granted Lawful development Extension Loft or dormer 7 docs

In Cardiff

  • 26/01908/FUL Awaiting decision

    9 St Peter's Street Roath Cardiff CF24 3BA

    Demolition of existing two storey side extension and replacement with new remodelled two storey extension

    10 Sep 2026 Full applications
  • 26/01395/FUL Granted

    190 Aberporth Road Llandaff North Cardiff CF14 2PS

    Change of use from c3 dwelling house to c4 6 bed HMO.

    6 Jul 2026 Full applications
  • 26/01033/FUL Granted

    Llanmaes Estate Office Michaelston Road St Fagans Cardiff CF5 6DU

    Change of use to a physiotherapy clinic

    19 May 2026 Full applications
  • 26/01706/FUL Granted

    Second Floor 2 Kingsway Cathays Cardiff CF10 3FD

    Install 4 grilles to the rear of the building

    11 Aug 2026 Full applications
  • 26/01708/FUL Granted

    Ground Floor 37 Whitchurch Road Gabalfa Cardiff CF14 3JN

    CHANGE OF USE FROM TANNING SALON TO PROFFESIONAL ADVICE/SOLICITOR SERIVCES

    11 Aug 2026 Full applications