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Planning application

26/01344/LDCP

21 Highfield Letchworth Garden City Hertfordshire SG6 3QD

Granted North Hertfordshire Lawful Development Certificate Proposed

Proposal

Insertion of rear dormer window, front and rear roof lights and second floor side window to facilitate loft conversion

As published by the council, reference 26/01344/LDCP

Timeline

Dates from the published record

  1. 3 Jun 2026

    Received by North Hertfordshire

  2. 25 Jun 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 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

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  • 24/02123/FPH Decided

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  • 26/01842/TCA Awaiting decision

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    23 Jul 2026 251m away Trees

In North Hertfordshire

  • 26/01621/LDCP Granted

    21 Danesbury Park Road Welwyn Hertfordshire AL6 9SH

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

    8 Jul 2026 Lawful development
  • 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