37 Cecil Crescent Hatfield AL10 0HG

1. 24 Jun 2026

   Received by Welwyn Hatfield

2. 24 Jul 2026

   Added to PlanIndex

3. 20 Aug 2026

   Decision issued: Granted

Welwyn Hatfield granted permission on 20 August 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.

• 40 Cecil Crescent Hatfield AL10 0HG

  6/2026/1202/HOUSE Submitted 10 Jul 2026 21m away

  Erection of single storey rear extension

  Granted Householder Extension
  Small domestic

• 10 Ground Lane Hatfield AL10 0HH

  6/2021/2194/FULL Submitted 20 Jul 2021 58m away

  Retention of subdivision of a single dwellinghouse into two x 2-bed dwellinghouses

  Granted Full applications
  Domestic

• 48 Cecil Crescent Hatfield AL10 0HG

  6/2021/2233/LAWP Submitted 26 Jul 2021 71m away

  Certificate of lawfulness for conversion of roofspace to habitable use to include a rear dormer and 2 x front rooflights

  Granted Lawful development Loft or dormer

• 48 Cecil Crescent Hatfield AL10 0HG

  6/2021/2232/HOUSE Submitted 26 Jul 2021 71m away

  Erection of a single storey rear extension

  Granted Householder Extension
  Small domestic

• 26 Cecil Crescent Hatfield AL10 0HF

  6/2021/1948/HOUSE Submitted 28 Jun 2021 81m away

  Erection of an outbuilding in rear garden

  Granted Householder
  Small domestic

• 52 Cecil Crescent Hatfield AL10 0HG

  6/2023/0015/HOUSE Submitted 4 Jan 2023 133m away

  Erection of a single storey rear conservatory following the demolition of an existing conservatory.

  Granted Householder Extension Demolition
  Small domestic

• 6/2026/1370/LAWP Granted

  17-17A Mill Lane Welwyn AL6 9EU

  Certificate of lawfulness for the change of use of offices to 3 x 2 bedroom flats

  Received 3 Aug, published by the council 15 Aug 2026 Lawful development
• 6/2026/1218/LAWP Granted

  43 Great Ley Welwyn Garden City AL7 4TJ

  Certificate of lawfulness for rear dormer roof extension to form a loft conversion

  Received 13 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1250/LAWP Granted

  40 Dellsome Lane Welham Green Hatfield AL9 7ND

  Certificate of lawfulness for Class A - Larger single storey rear extension (previously subject to prior approval application ref: 6/25/1851/PN8), Class B - Roof extension/hip to gable conversion, Class C - Other alterations to roof

  Received 16 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1210/LAWE Refused

  9 Flamingo Close Hatfield AL10 9LU

  Certificate of lawfulness for the existing use of the property as a HMO (Use Class C4) in continuous use for over 10 years

  Received 10 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/0735/LAWE Refused

  1 Northaw Place Coopers Lane Northaw Potters Bar EN6 4NQ

  Certificate of lawfulness for the existing use of the land as residential garden land ancillary to the dwellinghouse continuously since 2012

  Received 27 Apr, published by the council 24 Jul 2026 Lawful development