England · Local authority

Welwyn Hatfield planning applications

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

Collected application statistics

Collected records · All available dates

40,115Searchable applications

300Recorded as pending

86%Approval rate · 33,648 approved or refused records

4,801Refused applications

28,847 approved · 4,801 refused · 2,205 withdrawn. Received dates in our records: 29 Apr 1948 to 26 Oct 2026. Most recent record check: 30 Oct 2026. Counts reflect the last collected status; some records may be out of date.

Local planning information

Council sources checked 14 Sept 2026

Planning information Planning and building Local plan Our Local Plan Pre-application advice Pre-application advice (planning applications)Conservation areas Schedule of properties removed from the Welwyn Conservation Area Article 4 directions Article 4 Directions

Conservation areas and Article 4 directions

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.

Conservation areas9 mapped area records

Article 4 direction areasNo boundary records available in this collection

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.

More application records

Decided - RefusedW6/2007/0400/EM
ERECTION OF REAR CONSERVATORY
3 The Croft, Welwyn Garden City, AL7 4JY
Received 9 Mar 2007
Decided - Granted6/2020/2887/HOUSE
Erection of single and two storey rear extensions, first floor front extensions including new roof over porch, new windows to right elevation and rendering of first floor external walls.
6 Thrush Lane Cuffley Potters Bar EN6 4JU
Received 5 Nov 2020
Decided - Granted6/2018/2217/HOUSE
Erection of single storey rear extension, installation of PVC windows and doors and change of cladding from hanging tile to cedral board
43 Carleton Rise Welwyn AL6 9RQ
Received 28 Aug 2018
Decided - Granted6/2018/0229/EM
Extension of hand standing to include one additional car parking space.
Land to the front of 252, 254, 256 and 258 Heronswood Road Welwyn Garden City AL7 3JQ
Received 19 Jan 2018
Decided - WithdrawnW6/2008/1679/EM
ERECTION OF FIRST FLOOR REAR EXTENSION
8 SALISBURY ROAD, WELWYN GARDEN CITY, HERTFORDSHIRE, AL7 3SD
Received 27 Aug 2008
Decided - Granted6/2016/1762/EM
Removal of evergreen tree/hedge in rear garden
14 The Valley Green, Welwyn Garden City, AL8 7DQ
Received 26 Aug 2016
Decided - Granted6/2019/3092/EM
Crown reduce 2 x Apple tree (T1 and T4), 1 x Pear tree (T2), 1 x Cherry tree (T3) and 1 x Plum tree (T5) all by 33% and branch thinning
80 Handside Lane Welwyn Garden City AL8 6SJ
Received 6 Dec 2019
Decided - GrantedS6/2004/1761/FP
CHANGE OF USE FROM AGRICULTURAL BUILDING TO LIGHT INDUSTRIAL (B1) FOR TEMPORARY PERIOD OF THREE YEARS
Brewhouse Farm Wildhill Road Brookmans Park Hatfield AL9 6DS
Received 1 Dec 2004
Decided - Granted6/2021/3001/EMT
1 x Norway Maple to reduce by 1.5m height & 2m width and remove major deadwood
9 Mannicotts, Welwyn Garden City, AL8 7BW
Received 19 Oct 2021
Decided - GrantedS6/2012/2612/LUP
Certificate of lawfulness for the erection of a single storey rear extension
10 Glebeland Hatfield AL10 8AA
Received 14 Dec 2012
Decided - GrantedN6/2008/0933/DS
DISCHARGE OF CONDITION 2 (MATERIALS) OF PLANNING PERMISSION N6/20070/721/FP
33 Knightsfield, Welwyn Garden City, AL8 7JE
Received 27 Jun 2008
Decided - GrantedW6/2014/1371/TE
Removal of lower branches from Beech tree
4 Handside Green, Welwyn Garden City, AL8 6SQ
Received 24 Jun 2014
Decided - GrantedN6/2014/1327/FP
Erection of single storey rear extension, first floor side extension, conversion of garage to habitable accommodation and erection of outbuilding to rear following demolition of existing shed
365 Knightsfield, Welwyn Garden City, AL8 7NB
Received 11 Jun 2014
Decided - GrantedS6/2015/0120/FP
Loft conversion including rear dormers
36 Mymms Drive, Hatfield, AL9 7AF
Received 20 Jan 2015
Decided - GrantedN6/2009/1232/DS
DISCHARGE OF CONDITION 5 (REVISED PLANS FOR BATHROOM WINDOW & ROOF PLAN) FROM PLANNING PEMISSION N6/2009/0234/FP
34 Brockswood Lane, Welwyn Garden City, AL8 7BG
Received 22 Jun 2009
Decided - GrantedW6/2009/0309/EM
REPLACEMENT WINDOWS
4 MELBOURNE COURT, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 6LL
Received 2 Jun 2009
Decided - Refused6/2020/1344/FULL
Change of use of amenity land to residential driveway with new dropped kerb to highway
Bell Bar Pet Farm, Bell Lane, Brookmans Park, Hatfield, AL9 7AY
Received 12 Jun 2020
Decided - RefusedS6/2007/0844/FP
ERECTION OF REAR CONSERVATORY
53 Bullens Green Lane St Albans AL4 0QR
Received 11 Jun 2007
Decided - Granted6/2021/1386/FULL
Installation of hardstanding and bicycle shelter and rack.
80 - 102 Springfields Welwyn Garden City AL8 6XL
Received 29 Apr 2021
Decided - Refused6/2026/1109/FULL
Conversion of an existing stable building to provide one dwelling, with associated parking, cycle storage, refuse storage, landscaping and associated works
Northaw Brook Meadow Coopers Lane Road Northaw Potters Bar EN6 4FB
Received 26 Jun 2026
Decided - Granted6/2016/0641/FULL
Relocation of vehicular access to car park
71 Great North Road Hatfield AL9 5EN
Received 6 Apr 2016
Decided - GrantedS6/2009/0215/LU
CERTIFICATE OF LAWFULNESS FOR EXISTING D1 USE (DENTAL SURGERY)
Dental Surgery 7 Birchwood Avenue Hatfield AL10 0PL
Received 30 Jan 2009
Decided - Granted6/2025/0212/EM
Relay and increase hardstanding to the front of the property and install a replacement front door
106 Mill Green Road AL7 3XE
Received 7 Feb 2025
Decided - WithdrawnN6/2006/0101/FP
ERECTION OF SINGLE STOREY REAR EXTENSION
106 Mill Green Road Welwyn Garden City AL7 3XE
Received 24 Jan 2006

Records are ordered by application ID, not submission date. Use search to find a particular address or proposal.

View all applications

Get emailed about new planning applications in Welwyn Hatfield

Area 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 alert

Researching a proposal in Welwyn Hatfield Borough Council

Start 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

Guides to planning records

All planning guides

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.
UK research
Published 16 Jul 2026Updated 13 Sept 2026
Understanding planning · 13 min read
Planning permission drawings: how to read plans
Read planning drawings, floor plans, elevations and sections. Use labelled diagrams, a drawing comparison table and revision checks to understand a proposal.
UK research
Published 6 Aug 2026Updated 13 Sept 2026
Property research · 13 min read
Planning approval rates: how to read council statistics
Understand planning approval rates with an interactive calculator, worked examples and comparison table. Check sample sizes, outcomes and coverage before comparing.
UK research
Published 13 Aug 2026Updated 13 Sept 2026

What these statistics cover

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