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20 Castle Hill Avenue Berkhamsted Hertfordshire HP4 1HJ

25/01665/FHAFull Householder ApplicationApproved
Householder

Approved on 18 August 2025

Council decision: Grant Permission/ConsentDelegated (officer decision)

Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

Two storey front, side and rear extension. Roof extensions. New front bay window and porch canopy. Solar panels. New and altered fenestration.

Received
7 July 2025
Decision level
Delegated (officer decision)
Public comments
4
Ward
Berkhamsted Castle
Agent
Sargeant Architects
  1. Received7 Jul
  2. Validated7 Jul
  3. Consult.30 Jul
  4. Target
  5. Decided18 Aug

Decided in 42 days (council typically 49)

About this application

This is a full planning application for a rear extension at 20 Castle Hill Avenue Berkhamsted Hertfordshire HP4 1HJ. Dacorum has handled 3,053 applications of this type. This one was decided in 42 days, 7 days quicker than Dacorum's typical decision time. There has been 1 other application at this address. In the past year there have been 55 applications across Berkhamsted Castle. We hold 651 applications in total for the HP4 postcode area.

92% of full applications at Dacorum Borough Council were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode
HP4 1HJ
Application type
Full Householder Application
Scale / size
Small
Parish
Berkhamsted Town Council

Planning application dates

Date validated
7 July 2025
Consultation expiry
30 July 2025
Neighbour consultation start
9 July 2025
Neighbour consultation end
30 July 2025
Last date for comments
30 July 2025

Applicant and agent

Agent
Sargeant Architects
Architect profile
SARGEANT ARCHITECTS LIMITED
Agent address
Suite 3 29 Lower Kings Road Berkhamsted HP4 2AB United Kingdom

Additional information

Planning Portal ID
PP-14148689
Documents
22
Constraints
15

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 1: Low probability (rivers and sea)

Not published by this council, so not checked: tree preservation orders. Ask the council if these matter.

Possibly incomplete for this council: Article 4 directions.

Also checked, none recorded (22)

flood storage areas, conservation areas, listed buildings, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Associated applications

  1. 2026
    12 Oct

    Non material amendment attached to planning permission 25/01665/FHA

    ApprovedNon-material amendmentAmendment26/02224/NMA
  2. 2025
    7 Jul

    Two storey front, side and rear extension. Roof extensions. New front bay window and porch canopy. Solar…

    This applicationApprovedFull25/01665/FHA

Source: Dacorum

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