Skip to content
PlanIndex Get alerts
Menu

Planning application

37 Ton-yr-ywen Avenue Heath Cardiff CF14 4NZ

Granted Cardiff 25/01297/HSE Householder Planning Permission

Works: Extension Demolition 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

Demolition of existing rear utility / wc room & out house. Proposed side and rear single storey extension.

As published by the council, reference 25/01297/HSE

Application record

Reference
25/01297/HSE
Type
Householder Planning Permission
Status
Decided
Decision
Granted As published: Permission Granted
Received
5 Jun 2025
Validated
25 Jun 2025
Decided
14 Aug 2025
Ward
HEATH
Decision by
Delegated to Group Leader
Postcode
CF14 4NZ

Timeline

Dates from the published record

  1. 5 Jun 2025

    Received by Cardiff

  2. 25 Jun 2025

    Validated

    Checked as complete and ready for consideration.

  3. 14 Aug 2025

    Decision issued: Permission Granted

  4. 13 Sep 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Duffryn Design Agent, a design practice

11 applications on PlanIndex · across 2 councils · 100% granted

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

See their track record

Documents

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

4 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Cardiff granted permission on 14 August 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.

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

  • 68 Ton-yr-ywen Avenue Heath Cardiff CF14 4PB

    25/02162/HSE Submitted 22 Sep 2025 100 yards away

    Demolition of existing store and rear single storey structure. Proposed single storey side and rear extension. Hip to gable and rear dormer roof extension.

    Granted Householder Extension Loft or dormer +1 11 docs
    Small domestic

  • 27 St Edwen Gardens Heath Cardiff CF14 4JZ

    24/02646/CLPUD Submitted 8 Nov 2024 100 yards away

    Single storey rear extension to create downstairs WC and Utility Room

    Granted Lawful development Extension 11 docs
    Small domestic

  • 23 St Edwen Gardens Heath Cardiff CF14 4JZ

    21/00924/DCH Submitted 14 Apr 2021 100 yards away

    SINGLE STOREY SIDE AND REAR EXTENSION

    Granted Householder Extension 10 docs
    Small domestic

  • 25 St Edwen Gardens Heath Cardiff CF14 4JZ

    26/01450/HSE Submitted 13 Jul 2026 100 yards away

    93% historically approved · decision due ~7 Sep

    Demolition of Garage and Proposed rear extension.

    Awaiting decision Householder Extension Demolition 12 docs
    Domestic

  • 29 St Edwen Gardens Heath Cardiff CF14 4JZ

    23/00810/HSE Submitted 11 Apr 2023 100 yards away

    Single storey rear extension

    Granted Householder Extension 5 docs
    Small domestic

  • 21 St Edwen Gardens Heath Cardiff CF14 4JZ

    26/00178/CLPUD Submitted 29 Jan 2026 100 yards away

    Hip to gable and rear dormer roof extension. Demolition of existing lean to rear extension and construction of new single storey rear extension. External alterations to the property including installation of rooflights and PV Panels.

    Granted Lawful development Extension Loft or dormer +1 18 docs
    Small domestic

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