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17-17a Mill Lane Welwyn AL6 9EU

6/2026/0443/PN29Class AB - New dwellinghouses on terrace buildings in commercial or mixed use - Prior ApprovalAwaiting decision
Outline / PiP
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

Change of use of offices to 3 x 2 bedroom flats

Received
11 March 2026
Decision level
Delegated (officer decision)
Ward
Welwyn West
  1. Received11 Mar
  2. Validated11 Mar
  3. Consult.24 Apr
  4. Target
  5. Decided

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Comments close on 24 April.

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About this application

This is an outline application for a change of use at 17-17a Mill Lane Welwyn AL6 9EU. Welwyn Hatfield has handled 516 applications of this type. It has been with the council since 11 March 2026 and is still awaiting a decision. The site is in the Welwyn conservation area, with 18 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 102 applications across Welwyn West. We hold 969 applications in total for the AL6 postcode area.

73% of outline 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

Application details

Postcode
AL6 9EU
Application type
Class AB - New dwellinghouses on terrace buildings in commercial or mixed use - Prior Approval
Parish
Welwyn

Planning application dates

Date validated
11 March 2026
Consultation expiry
24 April 2026
Consultation end
24 April 2026
Decision issued
30 July 2026

Applicant and agent

Agent address
4 Ennismore Close Letchworth Garden City SG6 2SU

Planning decision

Decision
Not Determined
Case officer
Ms Emma Barral

Publicity

Advertisement expiry
24 April 2026

Additional information

UPRN
100081156266

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Welwyn
  • Listed building: Grade II: 13 and 15, Mill LaneOn or next to this site · +3 more
  • 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 (20)

flood storage areas, 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.

Planning history at this site

1 other application at this property, newest first.

  1. 2026
    20 Oct

    Demolition of existing garages and brick infill to front door

    PendingFULL PERMISSION6/2026/1890/FULL

Source: Welwyn Hatfield

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