15 Allandale Crescent Potters Bar Hertfordshire EN6 2JY

1. 9 Oct 2026

   Received by Hertsmere

2. 14 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 4 December 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Hertsmere took a median of 57 days over the applications it decided in the last year.

This application is with Hertsmere for determination, against a statutory target of eight weeks. Over the last year Hertsmere decided lawful development applications in a median of 55 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 14 Allandale Crescent Potters Bar Hertfordshire EN6 2JY

  26/0253/HSE Submitted 26 Feb 2026 50 yards away

  Construction of replacement front porch, addition of external wall insulation, and alterations to fenestration (Retrospective)

  Granted Householder Extension Windows or glazing 11 docs
  Small domestic

• 10 Allandale Crescent Potters Bar Hertfordshire EN6 2JY

  26/0288/CLP Submitted 4 Mar 2026 50 yards away

  Conversion of loft to habitable space with hip-to-gable roof alterations to include rear dormer and insertion of 3x front roof lights. Certificate of Lawful Development (Proposed).

  Granted Lawful development Loft or dormer Roofing 8 docs

• 3 Allandale Crescent Potters Bar EN6 2JY

  TP/09/1437 Submitted 21 Aug 2009 50 yards away

  *Electronic documents only, no paper fileSingle storey side extension, single storey rear extension. New skylight to flat roof at rear (amended description).

  Granted Full applications Extension 20 docs
  Small domestic

• 1 Allandale Crescent Potters Bar Hertfordshire EN6 2JY

  19/1677/CLP Submitted 18 Oct 2019 100 yards away

  Erection of detached outbuilding to rear of property. Certificate of Lawful Development (Proposed).

  Refused Lawful development 20 docs

• 37 Allandale Crescent Potters Bar Hertfordshire EN6 2JZ

  21/0910/CLP Submitted 26 Apr 2021 100 yards away

  Conversion of loft to habitable room with rear dormer, 3 roof lights to front and change in roof shape from hipped to gable. Certificate of lawfulness (Proposed).

  Granted Lawful development Loft or dormer 5 docs

• 314 Mutton Lane Potters Bar Hertfordshire EN6 2AX

  26/1247/CLP Submitted 27 Aug 2026 100 yards away

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

  Decided Lawful development Loft or dormer Roofing 3 docs

• 26/1156/CLP Decided

  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).

  Received 12 Aug, published by the council 25 Aug 2026 Lawful development
• 26/1494/CLP Awaiting decision

  32 Billy Lows Lane Potters Bar Hertfordshire EN6 1XN

  Demolition of existing garage and temporary shed to facilitate construction of single storey side extension, conversion of loft to habitable space to include hip to gable roof alterations, rear dormer and 4x front rooflights Certificate of Lawful Development (Proposed).

  Received 16 Oct, published by the council 21 Oct 2026 Lawful development
• 26/1489/CLP Awaiting decision

  6 Minorca Close Bentley Heath Barnet Hertfordshire EN5 4FA

  Erection of detached outbuilding in the rear garden for uses ancillary to the main dwelling. Certificate of Lawful Development (Proposed).

  Received 15 Oct, published by the council 20 Oct 2026 Lawful development
• 26/1258/CLP Granted

  106 Whitehouse Avenue Borehamwood Hertfordshire WD6 1HE

  Construction of single storey rear extension. Certificate of Lawful Development (Proposed).

  Received 1 Sep, published by the council 8 Sep 2026 Lawful development
• 26/1247/CLP Decided

  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).

  Received 27 Aug, published by the council 4 Sep 2026 Lawful development