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Planning application

20 Ruperra Close Old St Mellons Cardiff CF3 6HX

Granted Cardiff 25/02789/HSE Householder Planning Permission

Works: Extension 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

FIrst floor side extensions, ground floor side and rear extension, and relocation of carport, including associated external alterations.

As published by the council, reference 25/02789/HSE

Application record

Reference
25/02789/HSE
Type
Householder Planning Permission
Status
Decided
Decision
Permission Granted
Received
26 Nov 2025
Validated
26 Nov 2025
Decided
10 Feb 2026
Ward
PONTPRENNAU AND OLD ST MELLONS
Decision by
Delegated to Group Leader
Postcode
CF3 6HX

Site history

Applications at this address on the Cardiff register

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

  • 26/01452/NMA Granted

    20 Ruperra Close Old St Mellons Cardiff CF3 6HX

    Proposed Non-Material Amendment to Planning Permission 26/00673/HSE- Relocation of windows and doors and small infill between the main house and side extension.

    Decided 28 Jul 2026 Amendments
  • 26/00673/HSE Granted

    20 Ruperra Close Old St Mellons Cardiff CF3 6HX

    New front porch, ground and first floor side extensions, proposed car port and other associated works.

    Decided 2 Jun 2026 Householder

Timeline

Dates from the published record

  1. 26 Nov 2025

    Received by Cardiff

  2. 10 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

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

Active · incorporated 2024 · Cardiff

37 applications on PlanIndex · across 3 councils · 88% 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

7 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 this grant of permission means

Cardiff granted permission on 10 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 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 500 metres

  • 20 Ruperra Close Old St Mellons Cardiff CF3 6HX

    26/00673/HSE Submitted 1 Apr 2026 0m away

    New front porch, ground and first floor side extensions, proposed car port and other associated works.

    Granted Householder Extension 10 docs
    Small domestic

  • 20 Ruperra Close Old St Mellons Cardiff CF3 6HX

    26/01452/NMA Submitted 13 Jul 2026 0m away

    Proposed Non-Material Amendment to Planning Permission 26/00673/HSE- Relocation of windows and doors and small infill between the main house and side extension.

    Granted Amendments Extension Windows or glazing 6 docs

  • 6 Ruperra Close Old St Mellons Cardiff CF3 6HX

    24/02402/VAR Submitted 9 Oct 2024 125m away

    First floor side extension, external alterations to ground floor front elevation, single storey side and rear extension. (24/00861/HSE - Approved 09 September 2024 - Subsequently Varied Under 24/01679/NMA):- Variation of Condition 2 (Approved Plans) of Planning Permission 24/00861/HSE to amend the approved scheme as follows: 1) Additional single storey side extension.

    Granted Amendments Extension 10 docs
    Small domestic

  • 6 Ruperra Close Old St Mellons Cardiff CF3 6HX

    24/01679/NMA Submitted 17 Jul 2024 125m away

    Proposed Non-Material Amendment to Planning Permission 24/00861/HSE - Depth of proposed rear extension increased and sloped roof replaced with balcony area. Minor alterations to the internal layout.

    Granted Amendments Extension 18 docs

  • Land To The North Of Bridge Road Old St Mellons Cardiff

    23/02681/OUT Submitted 13 Nov 2023 186m away

    Construction of 3no. residential dwellings

    Withdrawn Outline 16 docs

  • Wayside Bridge Road Old St Mellons Cardiff CF3 6UY

    24/01574/HSE Submitted 4 Jul 2024 271m away

    Two storey side and rear extension

    Refused Householder Extension 6 docs
    Domestic

In Cardiff

  • 26/01907/HSE Awaiting decision

    46 Oakley Place Grangetown Cardiff CF11 7EW

    Rear dormer roof extension.

    10 Sep 2026 Householder
  • 26/01013/HSE Granted

    74 Beulah Road Rhiwbina Cardiff CF14 6LY

    Rear, side and front extensions, raised roof ridge height, front and rear dormers and minor internal and external works.

    18 May 2026 Householder
  • 26/01611/HSE Granted

    6 Dewi Court 47 Cardiff Road Llandaff Cardiff CF5 2ET

    Replacement of existing sliding patio doors with french doors, increase height of existing garden boundary walls on 2 sides with trellis and installation of stand alone garden room.

    30 Jul 2026 Householder
  • 26/01592/HSE Granted

    20 Meadow Street Pontcanna Cardiff CF11 9PY

    Construction of single storey rear wrap around extension.

    29 Jul 2026 Householder
  • 26/01905/HSE Awaiting decision

    9 Clos William Rhiwbina Cardiff CF14 6QJ

    Single Storey Side/Rear Extension with Internal Alterations. Loft Reconfiguration with Dormers. Detached Garage Enlargement.

    9 Sep 2026 Householder