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The Willows Marshmoor Lane Welham Green Hatfield AL9 7HT

6/2026/0433/HOUSEHOUSEHOLDER APPLICATIONRefused
Householder

Refused on 6 May 2026

Delegated (officer decision)2 reasons 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

Extension of existing residential dwelling, along with the demolition and re-construction of existing carport and store

Received
10 March 2026
Decision level
Delegated (officer decision)
Ward
Welham Green & Hatfield South
  1. Received10 Mar
  2. Validated12 Mar
  3. Consult.29 Apr
  4. Target
  5. Decided6 May

Decided in 55 days (council typically 56)

About this application

This is a full planning application for demolition at The Willows Marshmoor Lane Welham Green Hatfield AL9 7HT. Welwyn Hatfield has handled 2,195 applications of this type. This one was decided in 57 days. There has been 1 other application at this address. In the past year there have been 46 applications across Welham Green & Hatfield South. We hold 277 applications in total for the AL9 postcode area.

83% of full applications at Welwyn Hatfield 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.Planning something similar? See what gets approved on your street

Why it was refused

  1. As the application would form development that is not exempt from biodiversity net gain because the development constitutes a form of development that falls outside the scope of a householder application, there is insufficient information to assess whether the proposal would be able to comply with Policy SADM16 of the Local Plan and the requirements of the Environment Act 2021.
  2. Plan Revision Details Received Date Number Number 2392_TSP Tree Survey and Proposed 10 March 2026 2308-P20- B Location Plan 12 March 2026 E00 2308-P20- B Block Plan 12 March 2026 E01 2308-P20- B Existing GF Plan 12 March 2026 E02 2308-P20- B Existing Elevations 12 March 2026 E03 2308-P20- B Existing Elevations Store 12 March 2026 E04 2308-P20- C Proposed Block Plan 12 March 2026 P01 2308-P20- C Proposed GF Plan 12 March 2026 P02 2308-P20- B Proposed Elevations 12 March 2026 P03 2308-P20- B Proposed Elevations Home 12 March 2026 P04 office 2308-P20- Prop Landscaping Plan (low 12 March 2026 P05 Res)

From the council's decision notice.

Application details

Postcode
AL9 7HT
Application type
HOUSEHOLDER APPLICATION
Scale / size
Small
Parish
North Mymms

Planning application dates

Date validated
12 March 2026
Consultation expiry
29 April 2026
Consultation end
29 April 2026

Applicant and agent

Agent address
Nattymoor North End Exning, Newmarket CB8 7PD

Publicity

Site notice end
29 April 2026

Additional information

UPRN
10014209978
Documents
2

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: Article 4 directions and tree preservation orders. Ask the council if these matter.

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.

Source: Welwyn Hatfield

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