12 Grantham Green Borehamwood Hertfordshire WD6 2JJ

1. 2 Mar 2026

   Received by Hertsmere

2. 12 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 11 Jun 2026

   Decision issued: Grant Permission

4. 9 Aug 2026

   Added to PlanIndex

Hertsmere granted permission on 11 June 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 20 Grantham Green Borehamwood Hertfordshire WD6 2JJ

  21/0837/CLP Submitted 19 Apr 2021 50 yards away

  Conversion of loft to habitable room with rear dormer and 1 rooflight to front. Certificate of lawfulness (Proposed).

  Granted Lawful development Loft or dormer 7 docs

• 54 Dacre Gardens Borehamwood Hertfordshire WD6 2JW

  24/1127/CLP Submitted 3 Sep 2024 50 yards away

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

  Granted Lawful development Extension Loft or dormer +1 11 docs
  Small domestic

• 16 Burghley Avenue Borehamwood Hertfordshire WD6 2JF

  26/0734/HSE Submitted 28 May 2026 100 yards away

  Single story rear extension.

  Decided Householder Extension 3 docs
  Domestic

• 24 Burghley Avenue Borehamwood Hertfordshire WD6 2JF

  26/1423/HSE Submitted 2 Oct 2026 100 yards away

  92% historically approved · decision due ~27 Nov

  Retention of existing outbuilding. (Retrospective application.)

  Awaiting decision Householder
  Small domestic

• 57 Grantham Green Borehamwood Hertfordshire WD6 2JQ

  26/0772/CLP Submitted 4 Jun 2026 100 yards away

  Conversion of loft to habitable space including rear dormer and 3x front roof lights. Certificate of lawful development (Proposed).

  Decided Lawful development Loft or dormer 8 docs

• 24 Burghley Avenue Borehamwood Hertfordshire WD6 2JF

  23/0063/HSE Submitted 13 Jan 2023 100 yards away

  Insertion of dormer window to rear elevation.

  Withdrawn Householder Loft or dormer Windows or glazing 5 docs
  Domestic

• 26/0805/HSE Granted

  Rydal Mount Lodge Baker Street Potters Bar Hertfordshire EN6 2BP

  Demolition of existing conservatory to facilitate construction of single storey rear extension and front porch extension.

  Received 10 Jun, published by the council 24 Jul 2026 Householder
• 26/1218/HSE Refused

  22 The Grove Radlett Hertfordshire WD7 7NF

  Conversion of garage to habitable space with window to replace garage door and new pitched roof, construction of first floor side extension and part single, part two storey rear extension with insertion of 1x side rooflight, alterations to fenestration and front hard landscaping.

  Received 24 Aug, published by the council 1 Sep 2026 Householder
• 26/1253/HSE Granted

  159 Arundel Drive Borehamwood Hertfordshire WD6 2LZ

  Construction of single storey rear extension with pitched roof and 3x rooflights, and alterations to fenestration.

  Received 28 Aug, published by the council 4 Sep 2026 Householder
• 26/1250/HSE Granted

  3 The Walk Potters Bar Hertfordshire EN6 1QL

  Single storey side extension following demolition of existing detached garage and shed.

  Received 28 Aug, published by the council 4 Sep 2026 Householder
• 26/1075/HSE Granted

  7 Belmor Elstree Borehamwood Hertfordshire WD6 3JX

  Proposed boundary treatments to the rear of the property including replacement fence.

  Received 31 Jul, published by the council 12 Aug 2026 Householder