Skip to content
PlanIndex Get alerts
Menu

Planning application

24/1253/CLP

21 Barham Avenue Elstree Borehamwood Hertfordshire WD6 3PW

Granted Hertsmere Certificate Proposed Lawful Use/Dev

Proposal

Construction of outbuilding to rear garden. Certificate of Lawful Development (Proposed).

As published by the council, reference 24/1253/CLP

Timeline

Dates from the published record

  1. 1 Oct 2024

    Received by Hertsmere

  2. 22 Nov 2024

    Decision issued: Grant Lawful Certificate (Proposed Dev)

  3. 1 Aug 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

  • DOC/10/2319 Decided

    3 Orchard Close Elstree Borehamwood WD6 3PR

    Application for approval of details reserved by condition 2 of planning permission reference TP/09/1844.

    18 Nov 2010 112m away Conditions
  • 26/0797/HSE Awaiting decision

    6 Barham Avenue Elstree Borehamwood Hertfordshire WD6 3PN

    Construction of first floor rear enclosed terrace with 1.7m privacy screen following levelling of existing elevated flat roof section above ground floor.

    9 Jun 2026 147m away Householder
  • 24/1293/MA Granted

    4 Barham Avenue Elstree Borehamwood Hertfordshire WD6 3PN

    Application for a non-material amendment to allow for removal of chimney to north west elevation following the grant of planning permission reference 24/0588/HSE.

    8 Oct 2024 175m away Amendments
  • 26/0765/FUL Awaiting decision

    47 Park Crescent Elstree Borehamwood Hertfordshire WD6 3PT

    Demolition of existing dwelling and construction of replacement two storey 5x bedroom detached dwelling with accommodation at loft level. (ADDITIONAL INFO RECEIVED: 15/07/2026 & 24/07/2026 - response letter to Highways and PRA).

    4 Jun 2026 271m away Full applications
  • 26/0890/HSE Awaiting decision

    33 Park Crescent Elstree Borehamwood Hertfordshire WD6 3PT

    Demolition of existing detached garage and construction of part single, part two storey side and rear extension with new entrance porch and associated roof alterations to include additional front dormer, and removal of front rooflight and chimney stack.

    26 Jun 2026 272m away Householder
  • 24/1037/HSE Granted

    10 Blattner Close Elstree Borehamwood Hertfordshire WD6 3PD

    Part single part two storey rear extension following removal of conservatory, front porch canopy, conversion of loft to habitable space including rear dormer, roof extension and side and rear roof lights. Construction of a basement including land level alterations. Alterations to fenestration.

    9 Aug 2024 278m away Householder

In Hertsmere

  • 26/0872/CLP Granted

    118 Theobald Street Borehamwood Hertfordshire WD6 4PA

    Conversion of loft to habitable space with associated hip to gable roof alterations, to include rear dormer, insertion of 3x front rooflights and removal of chimney stack. Certificate of Lawful Development (Proposed).

    24 Jun 2026 Lawful development
  • 26/0681/CLP Granted

    40 Carrington Avenue Borehamwood Hertfordshire WD6 2HA

    Conversion of loft to habitable space to include rear dormer, 3x front rooflights and removal of chimney stack Certificate of Lawful Development (Proposed).

    19 May 2026 Lawful development
  • 26/1014/CLP Awaiting decision

    24 Mount Grace Road Potters Bar Hertfordshire EN6 1RD

    Construction of a single-storey outbuilding within the rear garden. Certificate of Lawful Development (Proposed).

    22 Jul 2026 Lawful development
  • 26/1015/CLP Awaiting decision

    24 Mount Grace Road Potters Bar Hertfordshire EN6 1RD

    Construction of a single-storey BBQ within the garden. Certificate of Lawful Development (Proposed).

    22 Jul 2026 Lawful development
  • 26/1011/CLE Awaiting decision

    6 Brickfield Cottages Theobald Street Borehamwood Hertfordshire WD6 4SD

    Construction of a single-storey detached outbuilding within the rear garden of the existing dwellinghouse for use as a private gym incidental to the enjoyment of the main dwelling (Use Class C3). Certificate of Lawful Development (Existing).

    21 Jul 2026 Lawful development