Islip House Mildred Avenue Borehamwood Hertfordshire WD6 2DH

1. 23 Apr 2026

   Received by Hertsmere

2. 16 Jun 2026

   Decision issued: Grant Permission

3. 9 Aug 2026

   Added to PlanIndex

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.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• Homeleigh Mildred Avenue Borehamwood Hertfordshire WD6 2DH

  23/0359/HSE Submitted 6 Mar 2023 66m away

  Conversion of loft to habitable room with rear dormer, insertion of roof lights to side elevations and removal of chimney stacks. Part single, part two storey side and rear extensions, rear raised patio and front dormer. Alterations to fenestration to include insertion of first floor rear Juliet balcony. (Revised application)

  Granted Householder Extension Loft or dormer +1 6 docs
  Domestic

• Islip House Mildred Avenue Borehamwood Hertfordshire WD6 2DH

  26/1055/FUL Submitted 28 Jul 2026 67m away

  84% historically approved · decision due ~22 Sep

  Change of use of existing incidental outbuilding to Pilates studio.

  Awaiting decision Full applications 8 docs

• Furze Lodge Mildred Avenue Borehamwood Hertfordshire WD6 2DH

  23/0119/TPO Submitted 25 Jan 2023 67m away

  T1 LONDON PLANE. Height to previous pollard point is c.11'.11'' Height of the previous 2/3 years growth from the previous pollard point, to be removed 11'.1''.

  Granted Trees 4 docs

• Islip House Mildred Avenue Borehamwood Hertfordshire WD6 2DH

  24/1218/TPO Submitted 24 Sep 2024 67m away

  T25,T26 and T27 3no. LIMES. Reduce the overall height of all trees from 5m to 3.5m and spread approx 3.5m to 2.5m. Crown thin up to 15%. Crown lift raise the lower branches to a height of 3-4m from ground level. Removal of Deadwood: Remove any dead, diseased, or broken branches from the trees to ensure safety and reduce the risk of falling debris. General Maintenance Pruning: Ensure all cuts are clean and in accordance with best arboricultural practices, keeping the trees healthy while reducing the risk of overgrowth in the future. Additional Information in Support of Application: The two trees in question have grown significantly over time and are now causing multiple issues that impact the safety, accessibility, and quality of life at the property: Overgrown Structure: The trees have outgrown the available space, extending branches and roots beyond reasonable limits, which is not only unsightly but also creates an overbearing presence. Obstruction of Light: The canopy of the trees is obstructing a significant amount of natural light from entering the property, particularly affecting rooms facing the trees. This lack of light reduces the livability and comfort inside the house. Access and Safety Concerns: The overgrowth is hindering safe access in and out of the driveway. The branches and roots are encroaching onto the driveway area, making it difficult to manoeuvre vehicles safely. There?s a risk of the branches or falling debris causing injury or property damage. ...

  Refused Trees 23 docs

• Oakleigh Mildred Avenue Borehamwood Hertfordshire WD6 2DH

  TPO/2009/968 Submitted 16 Apr 2009 67m away

  LIMES x 3 - Pollard to previous pollard points.

  Granted Trees

• 44 Cardinal Avenue Borehamwood Hertfordshire WD6 1ER

  26/0891/MA Submitted 26 Jun 2026 141m away

  84% historically approved · decision due ~21 Aug

  Application for a non-material amendment to allow for the removal of the proposed front projection from the approved outbuilding following the grant of planning permission ref. 26/0096/HSE.

  Awaiting decision 3 docs

• 26/1262/HSE Awaiting decision

  Roundbush House Round Bush Lane Aldenham Watford Hertfordshire WD25 8BG

  Construction of attached double garage with pitched roof.

  1 Sep 2026 Householder
• 26/1255/HSE Awaiting decision

  33 Coldharbour Lane Bushey Hertfordshire WD23 4NU

  Demolition of rear conservatory and existing two storey side extension; construction of part single, part two storey side and rear extension and two storey front extension with relocation of front entrance; conversion of loft to habitable space with associated hip to gable roof extensions, rear dormer with 2x Juliette balconies and insertion of 2x front and 4x side rooflights; 3x rear Juliette balconies at first floor level, alterations to side bay extension, alterations to fenestration and removal of 2x chimney stacks.

  28 Aug 2026 Householder
• 26/1253/HSE Awaiting decision

  159 Arundel Drive Borehamwood Hertfordshire WD6 2LZ

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

  28 Aug 2026 Householder
• 26/1250/HSE Awaiting decision

  3 The Walk Potters Bar Hertfordshire EN6 1QL

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

  28 Aug 2026 Householder
• 26/1248/HSE Awaiting decision

  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.

  28 Aug 2026 Householder