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85 Blanche Lane South Mimms Hertfordshire EN6 3PE

20/0213/HSEHouseholder ApplicationApproved
Householder

Approved on 8 April 2020

Council decision: Grant PermissionDelegated (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

Alterations to existing rear dormer to extend width and reduce the height.

Received
14 February 2020
Decision level
Delegated (officer decision)
Ward
Shenley
Agent
John Perrin & Sons Ltd
  1. Received14 Feb
  2. Validated14 Feb
  3. Consult.10 Mar
  4. Target10 Apr
  5. Decided8 Apr

Decided in 54 days (council typically 56)

About this application

This is a full planning application for a dormer extension at 85 Blanche Lane South Mimms Hertfordshire EN6 3PE. Hertsmere has handled 1,861 applications of this type. This one was decided in 54 days. There have been 2 other applications at this address. In the past year there have been 124 applications across Shenley. We hold 3,353 applications in total for the EN6 postcode area.

90% of full applications at Hertsmere Borough Council were approved. Across all application types, the council typically decides in about 8 weeks (median).

Based on decided applications received in the last 3 years.See what's approved near your address

Application details

Postcode
EN6 3PE
Application type
Householder Application
Scale / size
Small
Parish
South Mimms Parish Council

Planning application dates

Date validated
14 February 2020
Consultation expiry
25 March 2020
Consultation start
18 February 2020
Consultation end
10 March 2020
Neighbour consultation start
18 February 2020
Neighbour consultation end
10 March 2020
Last date for comments
25 March 2020
Target decision date
10 April 2020
Decision issued
9 April 2020
Permission expires
9 April 2023

Applicant and agent

Agent
John Perrin & Sons Ltd
Agent address
885 Green Lanes London N21 2QS

Planning decision

Statutory period
56 days

Publicity

Last advertised
4 March 2020
Advertisement expiry
25 March 2020
Site notice start
3 March 2020
Site notice end
24 March 2020

Additional information

Planning Portal ID
PP-08509084
Comments
0
Documents
9
Constraints
8

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: South Mimms
  • Green belt: Hertsmere
  • Flood zone 1: Low probability (rivers and sea)

Not published by this council, so not checked: Article 4 directions. Ask the council if these matter.

Possibly incomplete for this council: tree preservation orders.

Also checked, none recorded (20)

flood storage areas, listed buildings, 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. 2020
    14 Feb

    Single storey rear extension with rooflights (Amended plans received 17/03/2020)

    ApprovedHouseholderFiled alongside20/0212/HSE
  2. 2020
    14 Feb

    Alterations to existing rear dormer to extend width and reduce the height.

    This applicationApprovedFull20/0213/HSE

Source: Hertsmere

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