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Planning application

70 Hillside Avenue Borehamwood Hertfordshire WD6 1HL

Granted Hertsmere 26/0333/PD42 PD- Prior Approval 42 day (Hsehold ext)

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

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

Proposal

Single storey rear extension. Depth: 6.00m, Height: 3.75m, Eaves: 2.75 m.

As published by the council, reference 26/0333/PD42

Application record

Reference
26/0333/PD42
Type
PD- Prior Approval 42 day (Hsehold ext)
Status
Awaiting decision
Decision
Permitted
Received
12 Mar 2026
Validated
12 Mar 2026
Decided
6 May 2026
Ward
Borehamwood Hillside
Parish
Elstree & Borehamwood Town Council
Postcode
WD6 1HL

Site history

Applications at this address on the Hertsmere register

This site has had 2 applications since 2026: 2 approved, 0 refused.

  • 26/0334/CLP Granted

    70 Hillside Avenue Borehamwood Hertfordshire WD6 1HL

    Conversion of loft to habitable space to include hip to gable roof alterations, rear dormer, 1x front rooflight and removal of chimney stack Certificate of Lawful Development (Proposed).

    Decided 14 May 2026 Lawful development

Timeline

Dates from the published record

  1. 12 Mar 2026

    Received by Hertsmere

  2. 6 May 2026

    Decision issued: Permitted

  3. 9 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Agent on file, an architecture practice registered in London

6 applications on PlanIndex · across 2 councils

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Documents

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

9 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.

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What this grant of permission means

Hertsmere granted permission on 6 May 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.

About prior approval applications

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 70 Hillside Avenue Borehamwood Hertfordshire WD6 1HL

    26/0334/CLP Submitted 12 Mar 2026 0m away

    Conversion of loft to habitable space to include hip to gable roof alterations, rear dormer, 1x front rooflight and removal of chimney stack Certificate of Lawful Development (Proposed).

    Granted Lawful development Loft or dormer Roofing 12 docs

  • 72 Hillside Avenue Borehamwood Hertfordshire WD6 1HL

    21/1085/CLP Submitted 20 May 2021 7m away

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

    Granted Lawful development Loft or dormer 7 docs

  • 77 Hillside Avenue Borehamwood Hertfordshire WD6 1HQ

    23/0211/CLP Submitted 7 Feb 2023 64m away

    Conversion of loft to form habitable space including hip to gable roof alterations, rear dormer and 2 roof lights to front. Certificate of Lawful Development (Proposed).

    Granted Lawful development Loft or dormer Roofing 9 docs

  • 59 Hillside Avenue Borehamwood Hertfordshire WD6 1HQ

    21/0947/CLP Submitted 30 Apr 2021 71m away

    Conversion of loft to habitable room with hip to gable roof alterations, rear dormer, new side window, and 3 front rooflights. Certificate of Lawful Development (proposed).

    Granted Lawful development Loft or dormer Roofing +1 10 docs

  • 59 Hillside Avenue Borehamwood Hertfordshire WD6 1HQ

    21/0948/HSE Submitted 30 Apr 2021 71m away

    Construction of single storey front, side and rear extensions, following demolition of existing conservatory.

    Granted Householder Extension Demolition 11 docs
    Small domestic

  • 59 Hillside Avenue Borehamwood Hertfordshire WD6 1HQ

    24/0897/HSE Submitted 9 Jul 2024 71m away

    Single storey front, side and rear extension following demolition of rear conservatory.

    Granted Householder Extension Demolition 5 docs
    Small domestic

In Hertsmere

  • 26/0496/PD56M Granted

    Metropolitan House Darkes Lane Potters Bar Hertfordshire EN6 1AG

    Change of use from Office (Class E) to Residential (Class C3) for 96 flats.

    13 Apr 2026 Prior approval
  • 26/0075/PD56M Decided

    3 Wyllyotts Place Potters Bar Hertfordshire EN6 2JD

    Change of use from Class E to Class C3 to facilitate conversion of offices into 5 self contained flats.

    21 Jan 2026 Prior approval
  • 26/0526/PD42 Granted

    20 Kenilworth Drive Borehamwood Hertfordshire WD6 1QW

    Single storey rear extension. Depth: 6.00m, Height: 2.95m, Eaves: 2.75m.

    20 Apr 2026 Prior approval
  • 26/0539/PD42 Granted

    10 Blunesfield Potters Bar Hertfordshire EN6 5DG

    Single storey rear extension Depth: 7.00m, Height: 3.00m, Eaves: 3.00m.

    22 Apr 2026 Prior approval
  • 26/0493/PD56O Granted

    British Telecom Hatfield Road Potters Bar Hertfordshire EN6 1HR

    Removal of 6no. antennas at 19.45m and installation of 6no. replacement antennas located on the 2.5m stub tower extension. Relocation of 6no. OLO antennas and associated ancillary works.

    10 Apr 2026 Prior approval