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Planning application

66 Windermere Avenue Cyncoed Cardiff CF23 5PS

Awaiting decision Cardiff 26/01833/HSE Householder Planning Permission

Works: Extension Small domestic

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

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Proposed single-storey rear extension. Conversion of the roof space. Associated internal alterations and a new patio to the rear garden.

As published by the council, reference 26/01833/HSE

Application record

Reference
26/01833/HSE
Type
Householder Planning Permission
Status
Registered
Received
28 Aug 2026
Validated
28 Aug 2026
Ward
CYNCOED
Postcode
CF23 5PS

Comment by 24 September 2026

The council is taking comments on this application until then. Have your say on Cardiff's portal.

Timeline

Dates from the published record

  1. 28 Aug 2026

    Received by Cardiff

  2. 4 Sep 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 23 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Cardiff took a median of 55 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Agent on file

8 applications on PlanIndex · across 2 councils

Trade members see who it is, their full track record, and every application they have filed.

See who's behind it

Documents

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

20 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.

Trade members open them from here.

Open the documents

What happens while it is decided

The process from here

This application is with Cardiff for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

About householder applications

How this application type works

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

Nearby applications

Within 500 metres

  • 67 Windermere Avenue Cyncoed Cardiff CF23 5PS

    26/01131/HSE Submitted 2 Jun 2026 87m away

    Rear dormer and hip to gable roof.

    Refused Householder Loft or dormer 10 docs
    Domestic

  • 113 Lake Road West Cyncoed Cardiff CF23 5PJ

    22/02900/HSE Submitted 2 Dec 2022 136m away

    Ground floor rear extension and conversion of roof space including construction of dormer roof extensions

    Granted Householder Extension Loft or dormer 13 docs
    Domestic

  • 36 Windermere Avenue Cyncoed Cardiff CF23 5PR

    26/01688/CLPUD Submitted 7 Aug 2026 143m away

    Hip-to-gable roof extension, rear dormer roof extension and addition of front rooflights

    Granted Lawful development Extension Loft or dormer 6 docs

  • 44 Heath Mead Heath Cardiff CF14 3PJ

    22/02303/HSE Submitted 3 Oct 2022 150m away

    Demolition of Existing Single Storey Side/Rear Extension and the Erection of a Single Storey Side and Rear Extension. Insertion of Proposed Rooflights within the Front Elevation.

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

  • 171 Lake Road West Cyncoed Cardiff CF23 5PL

    22/02296/HSE Submitted 30 Sep 2022 207m away

    22/02296Rear single storey extension, rear dormer roof extension including material alterations

    Granted Householder Extension Loft or dormer 30 docs
    Small domestic

  • 89 Lake Road West Cyncoed Cardiff CF23 5PJ

    25/01612/CLPUD Submitted 10 Jul 2025 254m away

    New flat roof and external alterations to the rear elevation.

    Granted Lawful development 13 docs

In Cardiff

  • 25/01805/HSE Refused

    12 Hamilton Street Pontcanna Cardiff CF11 9BP

    Replacement of the existing ground and first floor front bay windows with sliding sash uPVC windows.

    1 Aug 2025 Householder
  • 26/01543/HSE Refused

    2 Camelot Way Thornhill Cardiff CF14 9AN

    Proposed open sided car port, drainage to one side and into a gravel soakaway.

    24 Jul 2026 Householder
  • 26/01841/HSE Awaiting decision

    160 Heol Llanishen Fach Rhiwbina Cardiff CF14 6RG

    Two storey side extension and loft conversion with front and rear dormers

    1 Sep 2026 Householder
  • 26/01505/HSE Granted

    100 Caer Wenallt Rhiwbina Cardiff CF14 7HQ

    Front & rear dormers, porch & internal alterations.

    20 Jul 2026 Householder
  • 26/01835/HSE Awaiting decision

    35 Chamberlain Road Llandaff North Cardiff CF14 2LW

    Demolition of existing garage and erection of 2 storey side extension and alterations.

    31 Aug 2026 Householder