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
PlanningTrack collects planning applications and decisions from the public planning register of Welwyn Hatfield Borough Council. Search an address, application reference or proposal. Official Welwyn Hatfield website
28,874 approved · 4,802 refused · 2,208 withdrawn. Received dates in our records: 29 Apr 1948 to 26 Oct 2026. Most recent record check: 2 Nov 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 Counts reflect the last collected status; some records may be out of date.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.
5 Old French Horn Lane Hatfield AL10 8AH
Received 18 Sept 2026135 Parkway, Welwyn Garden City, AL8 6JB
Received 26 Oct 200910 Bushey Ley Welwyn Garden City AL7 3HW
Received 9 Jun 20171 Orchard Road Welwyn AL6 9EX
Received 12 Jan 2024Linden Lodge Bulls Lane Hatfield AL9 7BB
Received 25 May 202350-52 Town Centre, Hatfield, AL10 0JJ
Received 5 Jan 20163 Allen Court Hatfield AL10 8XP
Received 9 Oct 202452 Birchall Wood Welwyn Garden City AL7 2HL
Received 4 Jun 201855 Northaw Road East Cuffley Potters Bar EN6 4LU
Received 20 Feb 20186 Colgrove Welwyn Garden City AL8 6HU
Received 14 Sept 2020First and Second Floor 12 Harpsfield Broadway Hatfield AL10 9TF
Received 27 May 202084 Warrengate Road North Mymms Hatfield AL9 7TY
Received 24 Feb 202228 Guessens Road Welwyn Garden City AL8 6RA
Received 5 Nov 202422 Marsden Road, Welwyn Garden City, AL8 6XZ
Received 9 Apr 20143 The Glade Welwyn Garden City AL8 7LG
Received 29 Apr 202517 Beehive Green Welwyn Garden City AL7 4BE
Received 24 Mar 2020110 Peartree Lane Welwyn Garden City AL7 3UJ
Received 23 Jan 2023Milbrook (formerly Milbrook Golf Clubhouse), Carbone Hill, Newgate Street, Hertford, SG13 8RD
Received 17 Jan 201460 Golden Dell Welwyn Garden City AL7 4EB
Received 12 Sept 202248 Marsden Green Welwyn Garden City AL8 6YB
Received 24 Oct 2024Tapi Carpets 52 Howardsgate Welwyn Garden City AL8 6BP
Received 15 Jan 201623 Blakes Way Welwyn AL6 9RE
Received 5 Feb 2021NORTH MYMMS PARK, TOLLGATE ROAD, NORTH MYMMS, HATFIELD, HERTFORDSHIRE, AL9 7TR
Received 27 Dec 2008102 Lemsford Lane Welwyn Garden City AL8 6YP
Received 22 May 2026Records are ordered by application ID, not submission date. Use search to find a particular address or proposal.
View all applicationsArea alerts send a daily or weekly email with new applications and decisions near a postcode, filtered by project type. £29 a month, up to 3 areas. Records are limited to the councils we collect.
Set up an area alertStart 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