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Planning application

57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

Granted Cardiff 25/02767/HSE Householder Planning Permission

Works: Extension Loft or dormer Small domestic

Read from the description, not a valuation. How we read the register

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

Proposal

Single storey rear extension, front porch extension, front and rear dormer roof extension, provision of additional driveway space and associated external alterations.

As published by the council, reference 25/02767/HSE

Application record

Reference
25/02767/HSE
Type
Householder Planning Permission
Status
Decided
Decision
Granted As published: Permission Granted
Received
25 Nov 2025
Validated
25 Nov 2025
Decided
22 May 2026
Ward
CYNCOED
Decision by
Chair (1- 5 Reps)
Postcode
CF23 6EJ

Site history

Applications at this address on the Cardiff register

This site has had 3 applications since 2025: 3 approved, 0 refused.

  • 26/01769/NMA Granted

    57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE - To reduce rear extension size and install new doors/windows and alter proposed window sizes

    Decided 9 Sep 2026 Amendments
  • 26/01229/NMA Granted

    57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE- minor alterations including a rooflight to the front roof slope and addition of a small window to the front elevation

    Decided 2 Jul 2026 Amendments

Timeline

Dates from the published record

  1. 25 Nov 2025

    Received by Cardiff

  2. 22 May 2026

    Decision issued: Permission Granted

  3. 22 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

2 later applications on the register refer to this one:

  • 26/01769/NMA Granted

    57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE - To reduce rear extension size and install new doors/windows and alter proposed window sizes

    Decided 9 Sep 2026 Amendments
  • 26/01229/NMA Granted

    57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE- minor alterations including a rooflight to the front roof slope and addition of a small window to the front elevation

    Decided 2 Jul 2026 Amendments

Who's behind it

Company information only, from the register and Companies House

KnK Design Studio Ltd Agent, a design practice registered in Cardiff

Active · incorporated 2024 · Cardiff

41 applications on PlanIndex · across 3 councils · 91% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

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Documents

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

15 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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Open the documents

What this grant of permission means

Cardiff granted permission on 22 May 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 householder applications

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.

Nearby applications

Within 0.3 miles

  • 57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    26/01229/NMA Submitted 15 Jun 2026 50 yards away

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE- minor alterations including a rooflight to the front roof slope and addition of a small window to the front elevation

    Granted Amendments Loft or dormer Windows or glazing 10 docs

  • 57 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    26/01769/NMA Submitted 19 Aug 2026 50 yards away

    Proposed Non-Material Amendment to Planning Permission 25/02767/HSE - To reduce rear extension size and install new doors/windows and alter proposed window sizes

    Granted Amendments Extension Windows or glazing 10 docs

  • 50 Celyn Avenue Cyncoed Cardiff CF23 6EP

    25/00930/HSE Submitted 22 Apr 2025 50 yards away

    Proposed part single, part two storey rear and side extension and rear dormer loft conversion.

    Granted Householder Extension Loft or dormer 10 docs
    Domestic

  • 1 Duffryn Avenue Lakeside Cardiff CF23 6LE

    22/01561/DCH Submitted 21 Jul 2022 50 yards away

    PROPOSED FRONT AND REAR SINGLE STOREY EXTENSIONS

    Granted Householder Extension 13 docs
    Small domestic

  • 49 Celyn Avenue Cyncoed Cardiff CF23 6EJ

    26/00916/HSE Submitted 4 May 2026 50 yards away

    Single storey rear, side and front porch extensions and demolition of garage/ storage.

    Refused Householder Extension Demolition 6 docs
    Small domestic

  • 13 Gwynant Crescent Cyncoed Cardiff CF23 6LT

    25/01849/NMA Submitted 7 Aug 2025 100 yards away

    Proposed Non-Material Amendment to Planning Permission 23/02834/HSE - 1) The installation of a different Air Source Heat Pump (ASHP). 2) A slight change in positioning of the ASHP.

    Granted Amendments 6 docs

In Cardiff

  • 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