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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

22 applications on PlanIndex · across 3 councils · 70% 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

  • 26 Ty-Mawr Avenue Rumney Cardiff CF3 3AF

    PD/09/00675/E Submitted 3 Sep 2009 50 yards away

    SIDE EXTENSION

    Refused Prior approval Extension

  • 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

  • 35 New Road Rumney Cardiff CF3 3DB

    PD/09/00654/E Submitted 2 Sep 2009 100 yards away

    PORCH

    Refused Prior approval Extension
    Small domestic

In Cardiff

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    Received 28 Jul, published by the council 6 Oct 2026 Lawful development
  • 26/02084/CLPUD Awaiting decision

    24 Bassetts Field Rhiwbina Cardiff CF14 9UG

    Proposed single storey flat roof extension to rear

    Received 2 Oct, published by the council 6 Oct 2026 Lawful development
  • 26/02050/CLPUD Awaiting decision

    First And Second Floor 85 Romilly Crescent Pontcanna Cardiff CF11 9NQ

    Change of use from Residential to C6 short-term let.

    Received 25 Sep, published by the council 6 Oct 2026 Lawful development
  • 26/02053/CLPUD Awaiting decision

    32 Homelands Road Heath Cardiff CF14 1UJ

    Single storey rear extension.

    Received 24 Sep, published by the council 6 Oct 2026 Lawful development
  • 26/01863/CLPUD Granted

    6 Llandennis Green Cyncoed Cardiff CF23 6JX

    Proposed conversion of existing integral garage to ancillary domestic accommodation, including minor internal alterations

    Received 4 Sep, published by the council 22 Sep 2026 Lawful development