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Planning application

21 Gills Hill Lane Radlett Hertfordshire WD7 8DE

Decided Hertsmere 25/1572/HSE Householder Application

Works: Extension Loft or dormer Roofing Demolition Windows or glazing Small domestic

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

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Demolition of existing car port, conservatory and single storey rear extension to facilitate construction of part single, part two storey side and rear extension. Alterations to fenestration and front porch. Conversion of loft to habitable space to include increased ridge height, hip to gable roof alterations and rear dormer.

As published by the council, reference 25/1572/HSE

Application record

Reference
25/1572/HSE
Type
Householder Application
Status
Unknown
Decision
Appeal decision
Received
30 Oct 2025
Validated
5 Nov 2025
Decided
9 Jul 2026
Ward
Aldenham West
Parish
Aldenham Parish
Postcode
WD7 8DE

Timeline

Dates from the published record

  1. 30 Oct 2025

    Received by Hertsmere

  2. 5 Nov 2025

    Validated

    Checked as complete and ready for consideration.

  3. 9 Jul 2026

    Decision issued: Appeal decision

  4. 24 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • Appeal: 26/0007/APP (Appeal Dismissed)

Who's behind it

Company information only, from the register and Companies House

PLK Design Limited Agent, a design practice registered in Borehamwood

Active · incorporated 2014 · Borehamwood

25 applications on PlanIndex · across 6 councils · 89% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

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

24 documents on file for this application

  • Appeal decision Appeal Decision · 09 Jul 2026
  • Appeal questionnaire Appeal Questionnaire · 13 Feb 2026
  • Appeal form Appeal Form · 10 Feb 2026
  • Grounds of appeal Appellant`s Case · 10 Feb 2026
  • Appendix 8 decision notice 23 gills hill lane jan 2026 Appellant`s Case · 10 Feb 2026
  • Appendix 7 officer report 23 gills hill lane jan 2026 Appellant`s Case · 10 Feb 2026
  • Appendix 6 email from case officer 9th january 2026 Appellant`s Case · 10 Feb 2026
  • Appendix 5 292-plk-04revh Appellant`s Case · 10 Feb 2026
  • Appendix 4 292-plk-03revh Appellant`s Case · 10 Feb 2026
  • Appendix 3 email from applicants 31st december 2025 Appellant`s Case · 10 Feb 2026
  • Appendix 2 email from case officer 29th december 2025 Appellant`s Case · 10 Feb 2026
  • Appendix 1 acknowledgment letter Appellant`s Case · 10 Feb 2026
  • Appendix 1 acknowledgment letter (evidence of agreement to change description) Appellant`s Case · 10 Feb 2026
  • Appendix 4 292-plk-03revh (new plans or drawings) Appellant`s Case · 10 Feb 2026
  • Appendix 5 292-plk-04revh (new plans or drawings) Appellant`s Case · 10 Feb 2026
  • Start letter Appeal Correspondence · 10 Feb 2026
  • Consultee comment submitted online Consultee Comment · 19 Nov 2025
  • Proposed plans & elevations Drawing/Plans · 06 Nov 2025
  • Applicationformredacted Application Form · 30 Oct 2025
  • Location plan Drawing/Plans · 30 Oct 2025
  • Design and access statement final oct 25 Supporting Documents · 30 Oct 2025
  • Existing plans & elevations Drawing/Plans · 30 Oct 2025
  • Existing sections, stree scene & roof plan Drawing/Plans · 30 Oct 2025
  • Proposed sections, streetscene & roof plan Drawing/Plans · 30 Oct 2025

Watch members (£5 a month) open the document list from here.

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After the decision

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.

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 0.3 miles

  • Church Of St John And Hall Gills Hill Lane Radlett Hertfordshire WD7 8DF

    21/1365/DOC Submitted 29 Jun 2021 50 yards away

    Application for approval of details reserved by conditions 9 (Car Park Management), 10 (Construction Management) and 11 (Tree Protection Plan) of planning permission reference 19/0044/FUL.

    Granted Conditions Trees 11 docs
  • 12 Gills Hill Lane Radlett Hertfordshire WD7 8DF

    21/0293/HSE Submitted 11 Feb 2021 100 yards away

    Demolition of existing outbuilding and erection of outbuilding to rear

    Granted Householder Demolition 9 docs
    Small domestic
  • Land At Rear Of 9-13 Gills Hill Lane Radlett Hertfordshire WD7 8DE

    14/1236/FUL Submitted 7 Aug 2014 100 yards away

    Partial demolition of 13 Gills Hill Lane and erection of 4 x 5 bed detached dwellings to include habitable loft accommodation with front and rear dormer windows, integral garages, associated access, car parking and landscaping on land at rear of 9-13 Gills Hill Lane (Revised Application).

    Refused Full applications Loft or dormer Demolition +1 28 docs
  • Allotments At Phillimore Recreation Ground Gills Hollow Radlett Hertfordshire

    24/1100/DOC Submitted 27 Aug 2024 150 yards away

    Application for approval of details reserved by condition 3 (material verification) of planning permission reference 21/1337/FUL.

    Granted Conditions 4 docs
  • Allotments At Phillimore Recreation Ground Gills Hollow Radlett Hertfordshire

    21/1337/FUL Submitted 25 Jun 2021 150 yards away

    Removal of existing access track and sub-base, construction of replacement track at a reduced level, with permeable type-3 sub base and surface course, insertion of new hedgerow along boundary of Phillimore Recreation Ground (amended plans received and description of development updated 31/05/2023).

    Granted Full applications Trees 24 docs
  • 11 Gills Hill Lane Radlett Hertfordshire WD7 8DE

    21/0990/HSE Submitted 10 May 2021 150 yards away

    Conversion of loft to habitable room to include increase in ridge height with 2 x front & 3 x rear dormers, construction of part single, part two storey front extension and single storey rear extension with associated roof alterations, new vehicular and pedestrian entrance with associated landscaping and alterations to fenestration.

    Withdrawn Householder Extension Loft or dormer +2 15 docs
    Small domestic

In Hertsmere

  • 26/0912/HSE Decided

    34 Elmroyd Avenue Potters Bar Hertfordshire EN6 2EE

    Conversion of loft to habitable space to include rear dormer.

    Received 3 Jul, published by the council 24 Jul 2026 Householder
  • 26/0890/HSE Decided

    33 Park Crescent Elstree Borehamwood Hertfordshire WD6 3PT

    Demolition of existing detached garage and construction of part single, part two storey side and rear extension with new entrance porch and associated roof alterations to include additional front dormer, and removal of front rooflight and chimney stack.

    Received 26 Jun, published by the council 24 Jul 2026 Householder
  • 26/1037/HSE Decided

    2 The Drive Park Avenue Bushey Hertfordshire WD23 2BJ

    Alterations to existing front dormer, new rear dormer, installation of rear rooflight and two side facing rooflights.

    Received 24 Jul, published by the council 8 Aug 2026 Householder
  • 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).

    Received 9 Feb, published by the council 24 Jul 2026 Householder
  • 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.

    Received 13 May, published by the council 24 Jul 2026 Householder