17-17A Mill Lane Welwyn AL6 9EU

This site has had 2 applications since 2026: 1 approved, 0 refused.

• 6/2026/0443/PN29 Decided

  17-17a Mill Lane Welwyn AL6 9EU

  Change of use of offices to 3 x 2 bedroom flats

  Decided 30 Jul 2026 Prior approval

1. 3 Aug 2026

   Received by Welwyn Hatfield

2. 5 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 15 Aug 2026

   Added to PlanIndex

4. 10 Sep 2026

   Decision issued: Granted

Welwyn Hatfield granted permission on 10 September 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 17-17a Mill Lane Welwyn AL6 9EU

  6/2026/0443/PN29 Submitted 11 Mar 2026 50 yards away

  Change of use of offices to 3 x 2 bedroom flats

  Decided Prior approval New dwelling

• 23-25 Mill Lane Welwyn AL6 9EU

  6/2026/0263/COND Submitted 16 Feb 2026 50 yards away

  Submission of details pursuant to condition number 2 (Material details) on planning permission 6/2025/1211/LB

  Granted Conditions 1 doc

• 23-25 Mill Lane Welwyn AL6 9EU

  6/2026/0262/COND Submitted 16 Feb 2026 50 yards away

  Submission of details pursuant to condition number 5 (Material details) and 6 (Hard and soft landscaping) on planning permission 6/2025/1212/HOUSE

  Granted Conditions
  Major scheme

• 1 Mimram Walk Welwyn AL6 9EZ

  6/2022/2721/TC Submitted 1 Dec 2022 50 yards away

  Weeping Beech in rear garden to south of property. 30% Crown reduction to balance

  Granted Trees

• The White Horse 30 Mill Lane Welwyn AL6 9ET

  6/2024/1409/FULL Submitted 24 Jul 2024 50 yards away

  Retrospective application for the erection of 4no. timber framed garden pods with polycarbonate roof to the rear garden, use of part of the existing rear storage outbuilding to garden bar servery, retention of the existing stretched tent located to the rear of the premises

  Granted Full applications

• 5 Mill Lane Welwyn AL6 9EY

  6/2024/2050/TC Submitted 23 Oct 2024 50 yards away

  Remove 1 x Beech tree

  Granted Trees

• 6/2026/1287/LAWE Refused

  Woodhurst Farm, Stables Cattlegate Road Northaw Potters Bar EN2 8AU

  Certificate of Lawfulness for existing use of a former agricultural building (Barn) as a self- contained single residential dwelling house (Use Class C3) following its conversion and continuous occupation for a period in excess of 10 years prior to the date of this application

  Received 22 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1306/LAWP Granted

  184 Unit 4 St Albans Road West Hatfield AL10 0TF

  Certificate of lawfulness for the change of use of the front office portion of Unit 4 to a daycare/crèche facility, to include an internal mezzanine, within Use Class E.

  Received 27 Jul, published by the council 22 Aug 2026 Lawful development
• 6/2026/1328/LAWP Granted

  41 Great North Road Welwyn Garden City AL8 7TJ

  Certificate of lawfulness for a proposed hip to gable loft conversion with rear facing dormer and single storey side extension, plus insertion of rooflight to front elevation

  Received 29 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1288/LAWE Granted

  1 The Limberlost Welwyn AL6 9TS

  Certificate of existing lawfulness for a single storey extension

  Received 22 Jul, published by the council 22 Aug 2026 Lawful development
• 6/2026/1297/LAWE Granted

  White Lodge Farm The Bellbrook Bulls Lane Hatfield AL9 7AZ

  Certificate of lawfulness in relation to existing gate and fencing

  Received 23 Jul, published by the council 9 Aug 2026 Lawful development