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Planning application

21 & 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

Granted Hertsmere 21/0874/FUL Full Planning Permission

Works: Extension

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

Proposal

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

As published by the council, reference 21/0874/FUL

Application record

Reference
21/0874/FUL
Type
Full Planning Permission
Status
Decided
Decision
Granted As published: Grant Permission
Received
21 Apr 2021
Validated
21 Apr 2021
Decided
15 Jun 2021
Ward
Borehamwood Hillside
Parish
Elstree & Borehamwood Town Council
Decision by
Delegated Decision
Postcode
WD6 1HG

Timeline

Dates from the published record

  1. 21 Apr 2021

    Received by Hertsmere

  2. 15 Jun 2021

    Decision issued: Grant Permission

  3. 9 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/0693/HSE Decided

    23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

    Partially retrospective application for alterations to existing first floor rear extension, and reduction to bulk of rear extension to loft and roof, to regularise works carried out following approval of application reference 21/0874/FUL.

    Decided 2 Oct 2026 Householder

Who's behind it

Company information only, from the register and Companies House

Robert Savage Associates Agent

9 applications on PlanIndex · across 5 councils

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Documents

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

12 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 15 June 2021, 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 full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 72 Cardinal Avenue Borehamwood Hertfordshire WD6 1ES

    26/1196/FUL Submitted 18 Aug 2026 50 yards away

    83% historically approved · decision due ~13 Oct

    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.

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  • 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

    26/0693/HSE Submitted 21 May 2026 50 yards away

    Partially retrospective application for alterations to existing first floor rear extension, and reduction to bulk of rear extension to loft and roof, to regularise works carried out following approval of application reference 21/0874/FUL.

    Decided Householder Extension 9 docs
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  • 5 Hillside Avenue Borehamwood Hertfordshire WD6 1HG

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  • 37 Hillside Avenue Borehamwood Hertfordshire WD6 1HQ

    21/1785/PD42 Submitted 1 Sep 2021 100 yards away

    Single storey rear extension. Depth: 6m, Height: 3m, Eaves: 3m.

    Granted Prior approval Extension 5 docs
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    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

In Hertsmere

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    Received 16 Oct, published by the council 22 Oct 2026 Full applications