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Kotzmuth Williams Architects

An architecture practice. 18 planning applications on PlanIndex across 2 councils . On the register from 2010 to 2026.

17 granted and 1 refused of 18 decided applications in our index. A record of decisions already made, not a forecast of the next one.

Where they work

  1. 94% approved here, against 95% for the council

What they file

  1. Householder72%
  2. Lawful development17%
  3. Full applications6%
  4. Prior approval6%

Track record

The 10 most recent applications naming this firm

  • 26/00909/CLPUD Granted

    34 Kelston Road Whitchurch Cardiff CF14 2AJ

    Single storey side extension.

    Decided 29 May 2026 Lawful development
  • 25/02629/HSE Granted

    31 St Ina Road Heath Cardiff CF14 4LS

    Single storey rear extension

    Decided 7 Jan 2026 Householder
  • 25/02026/HSE Granted

    33 West Orchard Crescent Canton Cardiff CF5 1AR

    Single storey rear extension with a new roof and external alterations to the property.

    Decided 28 Oct 2025 Householder
  • 25/01402/HSE Granted

    14 St Fagans Drive St Fagans Cardiff CF5 6EF

    Demolition of existing conservatory. New windows and external doors. New external cladding. Removal of existing tree.

    Decided 10 Oct 2025 Householder
  • 24/01678/HSE Granted

    9 Berthwin Street Pontcanna Cardiff CF11 9JH

    Single storey pitch roof extension to rear of house. New window to rear of existing side return extension.

    Decided 16 Sep 2024 Householder
  • 24/01492/HSE Granted

    112 Severn Grove Riverside Cardiff CF11 9EQ

    New door and windows to front elevation. New bike store in front garden. Single storey extension to rear. New dormer window to rear. New oriel window to rear bedroom on first floor. New roof windows. New bathroom window.

    Decided 4 Oct 2024 Householder
  • 23/02638/HSE Granted

    14 Plasturton Avenue Pontcanna Cardiff CF11 9HH

    Single storey rear extension. New roof (including roof windows) over existing side return extension. New windows to back of house.

    Decided 20 Feb 2024 Householder
  • 23/00295/CLD Granted

    30 Greenwich Road Canton Cardiff CF5 1EU

    Pitched roof single storey rear and side extension to semi-detached house.

    Decided 30 Mar 2023 Lawful development
  • 22/01731/DCH Granted

    28 Melrose Avenue Penylan Cardiff CF23 9AR

    SINGLE STOREY REAR EXTENSION AND ALTERATIONS TO EXISTING SINGLE STOREY UTILITY ROOM TO REAR

    Decided 13 Mar 2023 Lawful development
  • 22/01320/DCH Granted

    116 Heol Isaf Radyr Cardiff CF15 8EA

    ALTERATION TO THE SOUTH WEST CORNER EXTENSION. GROUND FLOOR WINDOWS REPLACED WITH NEW GLAZED DOOR - PREVIOUSLY APPROVED UNDER 21/02125/DCH

    Decided 6 Jul 2022 Householder

8 more applications on record

Trade members see everything this firm has filed, filter it by council and outcome, and get an email the day it files again.

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From council registers and Companies House. Counts describe the records we hold, not a firm's complete history. Request a correction or removal.