4 Ridge Lea Hemel Hempstead Hertfordshire HP1 2AY

26/01246/HPAHouseholder Prior ApprovalRefused

Householder

Refused on 30 June 2026

Council decision: Prior Approval RefusedDelegated (officer decision)1 reason for refusal

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

Single-storey rear extension measuring 5.00 metres deep with a maximum ridge height of 2.85 metres and maximum eaves height of 2.85 metres

Received: 3 June 2026
Decision level: Delegated (officer decision)
Public comments: 15
Council: Dacorum Borough Council
Ward: Chaulden And Warners End
Agent: Dimensions- Planning&Architecture

ReceivedReceived3 Jun
ValidatedValidated3 Jun
Consult.Consultation29 Jun
TargetTarget Date
DecidedDecided30 Jun

Decided in 27 days (council typically 49)

About this application

This is an outline application for a single storey rear extension at 4 Ridge Lea Hemel Hempstead Hertfordshire HP1 2AY. Dacorum has handled 723 applications of this type. This one was decided in 27 days, 3 weeks quicker than Dacorum's typical decision time. There have been 2 other applications at this address. In the past year there have been 57 applications across Chaulden And Warners End. We hold 1,540 applications in total for the HP1 postcode area.

89% of outline 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

Why it was refused

The proposed single-storey rear extension, by reason of its excessive depth and its siting adjacent to the shared boundary with No. 2 Ridge Lea, would result in an unacceptable and overbearing form of development that would significantly reduce the level of daylight and sunlight available to and over shawdow the private rear amenity area and rear facing habitable windows of No. 2. The proposal would have an unacceptable adverse impact on the amenity of the occupiers of No. 2 Ridge Lea and, as such, prior approval is refused in accordance with Paragraph A.4(7) of Schedule 2, Part 1, Class A of the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended), which requires consideration of the impact of the proposed extension on the amenity of adjoining premises.

From the council's decision notice.

Application details

Postcode: HP1 2AY
Application type: Householder Prior Approval
Scale / size: Small
Parish: Hemel Hempstead (No Parish)

Planning application dates

Date validated: 3 June 2026
Consultation expiry: 29 June 2026
Neighbour consultation start: 8 June 2026
Neighbour consultation end: 29 June 2026
Last date for comments: 29 June 2026

Applicant and agent

Agent: Dimensions- Planning&Architecture
Agent address: Unit 7 Hawthorn Business Park 165 Granville Road London NW2 2AZ United Kingdom

Additional information

Planning Portal ID: PP-14980424
Documents: 5
Constraints: 14

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.

Associated applications

2026
3 Jun
Single-storey rear extension measuring 5.00 metres deep with a maximum ridge height of 2.85 metres and…
This applicationRefusedOutline26/01246/HPA
2026
3 Jun
Loft conversion with rear dormer, Part single part two storey rear extension, side and rear extension…
RefusedLawful Development Certificate ProposedFiled alongside26/01247/LDP
2026
3 Jun
Two-storey side extension
PendingHouseholderFiled alongside26/01248/FHA

Source: Dacorum

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