Planning application
23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG
Works: Extension Domestic
Read from the description, not a valuation. How we read the register
Relates to 21/0874/FUL
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
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.
As published by the council, reference 26/0693/HSE
Application record
- Reference
- 26/0693/HSE
- Category
- Householder
- Status
- Awaiting decision
- Received
- 21 May 2026
- Validated
- 3 Jun 2026
- Ward
- Borehamwood Hillside
- Parish
- Elstree & Borehamwood Town Council
- Postcode
- WD6 1HG
Timeline
Dates from the published record
-
21 May 2026
Received by Hertsmere
-
3 Jun 2026
Validated
Checked as complete and ready for consideration.
-
24 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 29 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Hertsmere took a median of 58 days over the applications it decided in the last year.
Related applications
Cases linked to this one on the register
-
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.
Who's behind it
Company information only, from the register and Companies House
Robert Savage Associates Agent
8 applications on PlanIndex · across 5 councils
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
9 documents on file for this application
- Pre-existing roof plan and existing second floor plan
- Pre-existing elevations
- Pre-existing ground and first floor plans
- Block plan and existing and proposed west elevations
- Existing and proposed rear and east elevations
- Proposed first floor plan and rear elevation
- Existing ground and first floor plans, and location plan
- Applicationformredacted
- Form_1_cil_additional_information
Trade members open them from here.
Open the documentsWhat happens while it is decided
This application is with Hertsmere for determination, against a statutory target of eight weeks. Over the last year Hertsmere decided householder applications in a median of 64 days. More in our guide to how long planning decisions take.
About householder applications
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.
Nearby applications
Within 500 metres
-
21 & 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG
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
Erection of outbuilding to rear garden. Certificate of Lawful Development (Proposed).
Granted Lawful development 7 docs -
72 Cardinal Avenue Borehamwood Hertfordshire WD6 1ES
84% 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.
Awaiting decision Full applications Extension Loft or dormer +1 12 docs -
9 Oakwood Avenue Borehamwood Hertfordshire WD6 1SP
Single storey rear extension. Depth - 5.67m, Height - 3.9m, Eaves - 3m.
Granted Prior approval Extension 5 docsSmall domestic -
92A Whitehouse Avenue Borehamwood Hertfordshire WD6 1HE
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
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
Other householder applications
In Hertsmere
-
26/0157/HSE Decided
8 The Drive Radlett Hertfordshire WD7 7DA
Demolition of existing garage; construction of part single, part two storey side and rear extensions and front porch; alterations to levels and hard landscaping to front and rear; alterations to fenestration. (ADDITIONAL DOCUMENT RECEIVED: 18/08/2026 - Tree Report and Tree Protection Plan & secondary dropped kerb removed).
-
26/0653/HSE Decided
45 Highview Gardens Potters Bar Hertfordshire EN6 5PN
Construction of part single, part two storey side and rear extension with associated roof works.
-
26/0928/HSE Decided
5 Dellfield Close Radlett Hertfordshire WD7 8LS
Construction of two storey side and part single part two storey rear extension. Erection of detached double garage with ancillary utility space following the demolition of the existing garage. Conversion of loft to habitable room to include roof alterations and front, side and rear roof lights. Front porch extension.
-
26/0885/HSE Granted
89 Hatfield Road Potters Bar Hertfordshire EN6 1HZ
Demolition of existing detached garage and construction of part single, part two storey front, side and rear extension.
-
26/0985/HSE Decided
3 Bentley Place Bentley Heath Barnet Hertfordshire EN5 4BF
Part single, part two-storey rear extension, 2x new rear dormers, conversion of existing garage into habitable room, and alterations to fenestration.