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Planning application

20 Ty-mawr Avenue Rumney Cardiff CF3 3AF

Granted Cardiff 26/00270/CLPUD Cert of Lawfulness Proposed (s192)

Works: Extension

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

Proposal

Side extension

As published by the council, reference 26/00270/CLPUD

Application record

Reference
26/00270/CLPUD
Type
Cert of Lawfulness Proposed (s192)
Status
Decided
Decision
Granted As published: Permission Granted
Received
9 Feb 2026
Validated
9 Feb 2026
Decided
23 Feb 2026
Ward
RUMNEY
Decision by
Delegated to Group Leader
Postcode
CF3 3AF

Timeline

Dates from the published record

  1. 9 Feb 2026

    Received by Cardiff

  2. 23 Feb 2026

    Decision issued: Permission Granted

  3. 22 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Cytech Design Ltd Agent, a design practice registered in Cardiff

Active · incorporated 2013 · Cardiff

19 applications on PlanIndex · across 3 councils · 72% 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 23 February 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 lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 40 Ty-mawr Avenue Rumney Cardiff CF3 3AF

    23/00218/HSE Submitted 31 Jan 2023 100 yards away

    Single Storey Side Extension, Single and Double Storey Rear Extension, Front Porch and Car Port

    Granted Householder Extension 7 docs
    Small domestic

  • 13 New Road Rumney Cardiff CF3 3AA

    26/00026/CLPUD Submitted 7 Jan 2026 100 yards away

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

    Granted Lawful development Extension Loft or dormer 10 docs

  • 31 Ty-mawr Avenue Rumney Cardiff CF3 3AF

    23/00362/HSE Submitted 15 Feb 2023 100 yards away

    Single Storey Side and Rear Extension, and Hip to Gable Roof Extension with Rear Dormer

    Granted Householder Extension Loft or dormer 13 docs
    Small domestic

  • 614 Newport Road Rumney Cardiff CF3 4FE

    22/02643/HSE Submitted 7 Nov 2022 100 yards away

    Two Storey Rear Extension

    Refused Householder Extension 8 docs
    Domestic

  • 25 Uplands Road Rumney Cardiff CF3 3AN

    25/02655/HSE Submitted 14 Nov 2025 150 yards away

    Proposed hip to gable roof extension with rear dormer

    Granted Householder Extension Loft or dormer 10 docs
    Domestic

  • 15 Tredelerch Road Rumney Cardiff CF3 3AJ

    24/00608/HSE Submitted 13 Mar 2024 150 yards away

    Two storey side extension, single storey rear extension and rear dormer loft extension. Addition of boundary fence along Ty Mawr Avenue boundary.

    Granted Householder Extension Loft or dormer 13 docs
    Small domestic

In Cardiff

  • 26/01775/CLEUD Granted

    62 Cottrell Road Roath Cardiff CF24 3EZ

    Use of the property as 2 residential care flats (Class C2).

    Received 20 Aug, published by the council 29 Aug 2026 Lawful development
  • 26/01773/CLEUD Granted

    32 Connaught Road Roath Cardiff

    Use of the property as 5 residential care flats (Class C2).

    Received 20 Aug, published by the council 29 Aug 2026 Lawful development
  • 26/01774/CLEUD Granted

    57 Connaught Road Roath Cardiff CF24 3PW

    Use of the property as 4 residential care flats (Class C2).

    Received 20 Aug, published by the council 29 Aug 2026 Lawful development
  • 26/01883/CLPUD Awaiting decision

    Heathfield 135 Pantbach Road Heath Cardiff CF14 1TY

    Proposed enlargement of the existing single-storey rear extension and removal of the existing flat roof and construction of a pitched roof over the enlarged extension with associtated works

    Received 8 Sep, published by the council 13 Sep 2026 Lawful development
  • 26/01990/CLEUD Awaiting decision

    5 Talworth Street Roath Cardiff CF24 3EH

    Use of the property as a C4 House in Multiple Occupation (HMO).

    Received 8 Sep, published by the council 13 Sep 2026 Lawful development