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Planning application

6/2026/0597/HOUSE

125 Knella Road Welwyn Garden City AL7 3NA

Granted Welwyn Hatfield HOUSEHOLDER APPLICATION

Proposal

Erection of a single storey side extension

As published by the council, reference 6/2026/0597/HOUSE

Timeline

Dates from the published record

  1. 7 Apr 2026

    Received by Welwyn Hatfield

  2. 8 Jul 2026

    Decision issued: Granted

  3. 24 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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

  • 6/2026/0401/FULL Withdrawn

    Unit 1 Swallow Court Swallowfields Welwyn Garden City AL7 1SB

    Change of use to incorporate use classes E, F1 and F2

    4 Mar 2026 195m away Full applications
  • 6/2026/0717/COND Awaiting decision

    73 Bridge Road East Welwyn Garden City AL7 1UT

    Submission of details pursuant to Condition 16 (Hard & Soft Landscape Works), condition 18 (External lighting schemes) on planning permission 6/2020/2268/MAJ allowed under appeal APP/C1950/W/21/3284525

    23 Apr 2026 266m away Conditions
  • 6/2024/1793/PN8 Granted

    96 Salisbury Road Welwyn Garden City AL7 3SB

    Prior Approval for the erection of a single storey rear extension measuring 5m in depth, 3.20m in height and 2.82m to the eaves

    17 Sep 2024 326m away Prior approval
  • 30 Watchmead Welwyn Garden City AL7 1LT

    Erection of a rear extension, elevational alterations, amendments to service yard layout and car park, installation of a cycle shelter and smoking shelter, installation of external plant and refrigeration equipment and associated works

    23 Feb 2021 334m away Full applications
  • 6/2026/1053/EM Awaiting decision

    22 Ravenfield Road Welwyn Garden City AL7 3UE

    Front garden alterations

    17 Jun 2026 351m away
  • 56 Bridge Road East Welwyn Garden City AL7 1JU

    Submission of details pursuant to condition 1 on planning permission 6/2018/2871/PN11 for the change of use from offices (B1a) to residential (C3)

    26 Feb 2021 401m away Conditions

In Welwyn Hatfield

  • 9 Hill Rise Cuffley Potters Bar EN6 4ED

    Erection of a part single and part two storey rear extension, garage conversion to habitable use and alterations to fenestration

    24 Oct 2025 Householder
  • 7 Greenfield Hatfield AL9 5HW

    Erection of a single storey rear extension, conversion of double integral garage, covered porch, replacement front dormer and erection of new boundary wall following the removal of the existing hedge

    21 May 2026 Householder
  • 4 Northwood Welwyn Garden City AL7 2PX

    Erection of single storey rear extension and open pergola following demolition of conservatory

    3 Jun 2026 Householder
  • 41 Lemsford Lane Welwyn Garden City AL8 6YN

    Erection of a single storey side/rear extension following the demolition of existing outbuilding

    8 Jun 2026 Householder
  • 6/2026/1293/HOUSE Awaiting decision

    33 Claves Crescent Welwyn Garden City AL7 1WN

    Erection of a single storey rear conservatory

    22 Jul 2026 Householder