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Planning application

26/01621/LDCP

21 Danesbury Park Road Welwyn Hertfordshire AL6 9SH

Granted North Hertfordshire Lawful Development Certificate Proposed

Proposal

Two storey rear extension following removal of existing single storey rear elements

As published by the council, reference 26/01621/LDCP

Timeline

Dates from the published record

  1. 8 Jul 2026

    Received by North Hertfordshire

  2. 24 Jul 2026

    Added to PlanIndex

  3. 28 Jul 2026

    Decision issued: Granted

  4. 30 Jul 2026

    Status changed to Awaiting decision

    Previously Registered.

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 lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 26/01038/LDCP Refused

    21 Danesbury Park Road Welwyn Hertfordshire AL6 9SH

    Two storey rear extension following demolition of existing rear elements.

    5 May 2026 0m away Lawful development
  • 26/01131/PIP Granted

    Land At The Rear Of 25 Danesbury Park Road Welwyn Hertfordshire AL6 9SH

    Erection of up to 2 dwellings and associated infrastructure

    30 Apr 2026 133m away Outline
  • 26/00115/FP Awaiting decision

    Land Adjacent 21 Danesbury Park Road Pottersheath Hertfordshire AL6 9SH

    Erection of two detached dwellings with detached garages including parking and hard and soft landscaping.

    25 Feb 2026 193m away Full applications
  • 33 The Avenue Welwyn AL6 0PW

    Prior approval for the construction of an additional storey to facilitate the enlargement of the dwellinghouse to a maximum of approximately 9.02m in height.

    11 Jun 2021 201m away Prior approval
  • 3 The Crest Welwyn AL6 0EF

    Installation of electric sliding gate

    12 Sep 2024 235m away Householder
  • 3 The Crest Welwyn AL6 0EF

    Certificate of lawfulness for conversion of garage into playroom and alterations to fenestration

    12 Sep 2024 235m away Lawful development

In North Hertfordshire

  • 26/01501/LDCP Granted

    56 Grays Lane Hitchin Hertfordshire SG5 2HJ

    Erection of detached single storey rear garden room

    24 Jun 2026 Lawful development
  • 26/01293/LDCP Refused

    35 Dacre Road Hitchin Hertfordshire SG5 1QJ

    Insertion of rear dormer window with Juliet barrier and two front rooflights

    22 Jun 2026 Lawful development
  • 26/01557/LDCP Granted

    11 Matthew Gate Hitchin Hertfordshire SG4 9EQ

    Insertion of rear box dormer with Juliet balcony and 2 no. front rooflights to facilitate loft conversion to habitable space

    16 Jun 2026 Lawful development
  • 26/01672/LDCP Refused

    3 Westfield Lane Hitchin Hertfordshire SG5 2HE

    Alterations to existing roof to include hip to gable roof extension and insertion of rear dormer window and second floor side window to facilitate loft conversion into habitable accommodation.

    2 Jul 2026 Lawful development
  • 26/01554/LDCP Granted

    76 Pondcroft Road Knebworth Hertfordshire SG3 6DE

    Insertion of L shaped rear dormer with Juliet balcony and 3 no. front roof lights to facilitate loft conversion to habitable space

    16 Jun 2026 Lawful development