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Planning application

11 Windmore Avenue Potters Bar Hertfordshire EN6 3BE

Granted Hertsmere 21/1486/CLP Certificate Proposed Lawful Use/Dev

Works: Loft or dormer

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Conversion of loft to habitable room with rear dormer, change in roof shape from hipped to gable and 2 rooflights to front. Certificate of lawfulness (Proposed).

As published by the council, reference 21/1486/CLP

Application record

Reference
21/1486/CLP
Type
Certificate Proposed Lawful Use/Dev
Status
Decided
Decision
Grant Lawful Certificate (Proposed Dev)
Received
19 Jul 2021
Validated
19 Jul 2021
Decided
7 Sep 2021
Ward
Potters Bar Furzefield
Parish
No Parish
Decision by
Delegated Decision
Postcode
EN6 3BE

Timeline

Dates from the published record

  1. 19 Jul 2021

    Received by Hertsmere

  2. 7 Sep 2021

    Decision issued: Grant Lawful Certificate (Proposed Dev)

  3. 5 Sep 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

16 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

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

  • 13 Windmore Avenue Potters Bar EN6 3BE

    TP/13/1049 Submitted 1 May 2013 8m away

    Erection of new front porch and single storey side and rear extension following demolition of existing rear conservatory.

    Granted Householder Extension Demolition 9 docs
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  • 58 Wroxham Gardens Potters Bar Hertfordshire EN6 3DL

    26/0824/CLP Submitted 15 Jun 2026 59m away

    78% historically approved · decision due ~10 Aug

    Demolition of existing conservatory to facilitate constuction of single storey rear extension. Certificate of Lawful Development (Proposed).

    Decided Lawful development Extension Demolition 7 docs
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  • 82 Wroxham Gardens Potters Bar Hertfordshire EN6 3DL

    26/1083/CLE Submitted 3 Aug 2026 59m away

    78% historically approved · decision due ~28 Sep

    Existing use as an HMO (Class C4). Certificate of Lawful Development (Existing).

    Awaiting decision Lawful development 8 docs

  • 58 Wroxham Gardens Potters Bar Hertfordshire EN6 3DL

    26/0594/PD42 Submitted 1 May 2026 59m away

    84% historically approved · decision due ~26 Jun

    Demolition of existing conservatory and construction of single storey rear extension Depth: 4.00m, Height: 3.70m, Eaves: 2.60m.

    Decided Extension Demolition
    Small domestic

  • 31 Windmore Avenue Potters Bar Hertfordshire EN6 3BE

    21/0843/HSE Submitted 19 Apr 2021 85m away

    Erection of a new front porch with insertion of window to side elevation.

    Granted Householder Extension Windows or glazing 8 docs
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  • 95 Wroxham Gardens Potters Bar Hertfordshire EN6 3DN

    24/1331/PD42 Submitted 15 Oct 2024 108m away

    Single storey rear extension. Depth: 4.0m, Height: 3.0m, Eaves: 3.0m.

    Granted Prior approval Extension 4 docs
    Small domestic

In Hertsmere

  • 26/1247/CLP Awaiting decision

    314 Mutton Lane Potters Bar Hertfordshire EN6 2AX

    Conversion of loft to habitable space including hip to gable roof alterations, rear dormer and 2x front roof lights. Certificate of lawful development (Proposed).

    27 Aug 2026 Lawful development
  • 26/1222/CLP Awaiting decision

    37 Duncan Way Bushey Hertfordshire WD23 2BE

    Conversion of loft to habitable space with associated hip to gable roof alterations, rear dormer, insertion of 3x front rooflights and removal of 2x chimney stacks, with side window at loft level. Certificate of Lawful Development (Proposed).

    24 Aug 2026 Lawful development
  • 26/1220/CLP Awaiting decision

    The Farm House The Green Letchmore Heath Watford Hertfordshire WD25 8ES

    Removal of approximately 1.4m of private garden hedge and installation of an inward-opening pedestrian gate and posts, with a maximum overall height of 1.0 metre above existing ground level, wholly within the property boundary. Certificate of Lawful Development (Proposed).

    24 Aug 2026 Lawful development
  • 26/1171/CLP Awaiting decision

    15 Catsey Woods Bushey Hertfordshire WD23 4HS

    Conversion of loft to habitable space with rear dormer and Juliet balcony, 1x window at loft level to each side, and insertion of 1x rear and 3x front rooflights. Certificate of Lawful Development (Proposed).

    14 Aug 2026 Lawful development
  • 26/1156/CLP Awaiting decision

    30 Ladbrooke Drive Potters Bar Hertfordshire EN6 1QR

    Single storey rear extension. Conversion of loft to habitable space with hip-to-gable roof alterations to include rear dormer. Certificate of Lawful Development (Proposed).

    12 Aug 2026 Lawful development