Understanding planning · 13 min read
Planning application documents: what to read first
Understand planning application documents, officer reports and decision notices. Use a reading checklist, document table and worked example to inspect a case.
England · Local authority
Explore collected planning applications and decisions for Welwyn Hatfield Borough Council. Search an address, application reference or proposal to find a record.
17,621 approved · 2,811 refused · 1,317 withdrawn. Received dates in our records: 5 Jan 2005 to 2 Oct 2026. Most recent record check: 15 Oct 2026. Counts reflect the last collected status; some records may be out of date.
Explore published planning boundaries and follow their source records for designation details. Coverage varies: an empty map does not mean there are no restrictions. Check the council’s current maps and documents before relying on a boundary.
Interactive planning map loads with JavaScript. Dataset sources are linked below.
Download Article 4 coverage for all authorities (CSV)
Data downloaded 14 Sept 2026. Display boundaries are simplified and indicative. Map record counts are not a complete count of designations or directions.
Sources: Planning Data conservation areas and Article 4 direction areas. Contains public sector information licensed under the Open Government Licence v3.0.
9 Little Rivers Welwyn Garden City AL7 1QJ
Received 26 Feb 202198 Harmer Green Lane Digswell Welwyn AL6 0ES
Received 11 Jul 202341 Valley Road Welwyn Garden City AL8 7DH
Received 30 Dec 20212 Hillcrest Hatfield AL10 8HW
Received 14 May 201522 Ravenfield Road Welwyn Garden City AL7 3UE
Received 20 Apr 2017The Old Vicarage Vineyards Road Northaw Potters Bar EN6 4NZ
Received 7 Mar 2022Onslow St Audreys School Old Rectory Drive Hatfield AL10 8AB
Received 26 Jul 20175 Mardley Heights Welwyn AL6 0TX
Received 22 Apr 2021177 Howlands Welwyn Garden City AL7 4RL
Received 31 Mar 20251 Parkfields Welwyn Garden City AL8 6EE
Received 30 Mar 2022Unit 40 -45 The Galleria Comet Way Hatfield AL10 0XR
Received 1 Sept 202330 Dellcott Close Welwyn Garden City AL8 7BB
Received 3 May 201876 Rivenhall End Welwyn Garden City AL7 2PH
Received 28 Apr 20251 Roe Green Close Hatfield AL10 9PD
Received 26 Aug 202222 Mandeville Rise Welwyn Garden City AL8 7JU
Received 30 Apr 202084 High Dells Hatfield AL10 9HU
Received 2 May 20165 Carve Ley Welwyn Garden City AL7 3HL
Received 18 Jun 2020Eisai Europe Limited, European Knowledge Centre, Mosquito Way, Hatfield, AL10 9SN
Received 20 Jul 202034 Brookside Crescent Cuffley Potters Bar EN6 4QN
Received 10 Jun 2022Land at Green Close Brookmans Park AL9 7ST
Received 8 Apr 202648 Ground Lane Hatfield AL10 0HH
Received 5 Nov 20183 Osborne Court Osborne Road Little Heath Potters Bar EN6 1SX
Received 12 Feb 202528 New Park Road Newgate Street Hertford SG13 8RF
Received 3 May 201716 Guessens Road Welwyn Garden City AL8 6QR
Received 22 May 2024Records are ordered by application ID, not submission date. Use search to find a particular address or proposal.
View all applicationsStart with the address or application reference. Open a record to read the proposal, dates and available documents, then check the official register for the latest plans and consultation details. If nothing appears, check coverage before treating the result as a complete planning history.
How to search planning applications
Understanding planning · 13 min read
Understand planning application documents, officer reports and decision notices. Use a reading checklist, document table and worked example to inspect a case.

Understanding planning · 13 min read
Read planning drawings, floor plans, elevations and sections. Use labelled diagrams, a drawing comparison table and revision checks to understand a proposal.

Property research · 13 min read
Understand planning approval rates with an interactive calculator, worked examples and comparison table. Check sample sizes, outcomes and coverage before comparing.
These figures describe applications collected by PlanningTrack for Welwyn Hatfield Borough Council, across all dates currently available. They are a partial dataset, rather than an authority-wide performance measure. The date range does not establish continuous historical coverage.
The approval percentage is approved records divided by approved plus refused records. Pending, withdrawn and unknown outcomes are excluded. No percentage is shown until there is an approved or refused record.
Check collection coverage