23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

1. 21 May 2026

   Received by Hertsmere

2. 3 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

4. 2 Oct 2026

   Decision issued

5. 2 Oct 2026

   Status changed to Decided

   Previously Awaiting decision.

• 21/0874/FUL Granted

  21 & 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

  Two storey rear extension to No.21 and first floor rear extension to No.23.

  Decided 15 Jun 2021 Full applications

Hertsmere has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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.

• 21 & 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

  21/0874/FUL Submitted 21 Apr 2021 50 yards away

  Two storey rear extension to No.21 and first floor rear extension to No.23.

  Granted Full applications Extension 12 docs

• 5 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

  21/0722/CLP Submitted 1 Apr 2021 50 yards away

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

  Granted Lawful development 7 docs

• 72 Cardinal Avenue Borehamwood Hertfordshire WD6 1ES

  26/1196/FUL Submitted 18 Aug 2026 100 yards away

  Amendment to 25/1574/FUL to include conversion of loft to habitable space with hip-to-gable roof extension and rear dormer, with associated roof alterations.

  Granted Full applications Extension Loft or dormer +1 15 docs

• 9 Oakwood Avenue Borehamwood Hertfordshire WD6 1SP

  21/1633/PD42 Submitted 9 Aug 2021 100 yards away

  Single storey rear extension. Depth - 5.67m, Height - 3.9m, Eaves - 3m.

  Granted Prior approval Extension 5 docs
  Small domestic

• 92A Whitehouse Avenue Borehamwood Hertfordshire WD6 1HE

  22/2002/CLP Submitted 1 Dec 2022 100 yards away

  Conversion of loft to habitable room with hip to gable roof alterations, rear dormer, and 2 x front roof lights. Certificate of Lawful Development (Proposed).

  Refused Lawful development Loft or dormer Roofing 11 docs

• 92A Whitehouse Avenue Borehamwood Hertfordshire WD6 1HE

  23/0386/CLP Submitted 9 Mar 2023 100 yards away

  Conversion of loft to habitable room with hip to gable roof alterations to include rear dormer and insertion of 2 x front roof lights. Certificate of Lawful Development (Proposed) (Revised Application).

  Granted Lawful development Loft or dormer Roofing 11 docs

• 26/1319/HSE Granted

  54 The Shrublands Potters Bar Hertfordshire EN6 2BW

  Single storey side extension and front porch.

  Received 10 Sep, published by the council 23 Sep 2026 Householder
• 26/1324/HSE Granted

  12 Nightingale Close Radlett Hertfordshire WD7 8NT

  Partial conversion of garage to habitable space, construction of single storey rear extension and front porch extension, alterations to fenestration.

  Received 11 Sep, published by the council 21 Sep 2026 Householder
• 26/1263/HSE Granted

  11 Juniper Gardens Shenley Radlett Hertfordshire WD7 9LA

  Single storey rear extension.

  Received 1 Sep, published by the council 23 Sep 2026 Householder
• 26/1303/HSE Granted

  14 Hartfield Avenue Elstree Borehamwood Hertfordshire WD6 3JE

  Alterations to fenestration to include replacement of garage door with window and side elevation window changes.

  Received 8 Sep, published by the council 15 Sep 2026 Householder
• 26/1248/HSE Granted

  24 Farm Way Bushey Hertfordshire WD23 3SS

  Single storey rear extension; single storey front extension to include porch, conversion of garage to habitable space and replacement of garage door with window; first floor side extension.

  Received 28 Aug, published by the council 4 Sep 2026 Householder