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

40,297Searchable applications

322Recorded as pending

86%Approval rate · 33,788 approved or refused records

4,816Refused applications

28,972 approved · 4,816 refused · 2,217 withdrawn. Received dates in our records: 29 Apr 1948 to 29 Oct 2026. Most recent record check: 7 Nov 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 Counts reflect the last collected status; some records may be out of date.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

Decided6/2022/2143/TC
T1 - Oak - Dead - fell T2 - Hawthorn - Dead - fell T3 - Wild Cherry - fell
3 Roundwood Drive Welwyn Garden City AL8 7JZ
Received 14 Sept 2022
Decided - GrantedN6/2007/1513/FP
ERECTION OF SINGLE STOREY FRONT AND SIDE EXTENSION, NEW DORMER WINDOW AND ALTERATIONS TO ROOF TO FORM DUTCH HIP
1 Rosecroft Lane Welwyn AL6 0UB
Received 16 Oct 2007
Decided - Granted6/2022/0786/EM
Formation of extended driveway
24 Turmore Dale Welwyn Garden City AL8 6HS
Received 30 Mar 2022
Decided - Refused6/2020/1356/LAWP
Certificate of lawfulness for conversion of garage into habitable space
8 Ellesfield Welwyn AL6 9HB
Received 15 Jun 2020
Decided - GrantedS6/2013/0250/FP
Erection of single storey front and rear extensions
363 St Albans Road West, HATFIELD, AL10 9RU
Received 6 Feb 2013
Decided - Granted6/2015/2179/HOUSE
Erection of part single and two strorey rear extension with alterations to openings
149 Salisbury Road, Welwyn Garden City, AL7 3RZ
Received 22 Oct 2015
Decided - GrantedS6/2015/0179/FP
Demolition of existing stable building and erection of a dwellinghouse with associated works
Osborne House Farm Hawkshead Road Little Heath Potters Bar EN6 1LX
Received 28 Jan 2015
Decided - GrantedN6/2009/1717/LB
THE REPAIR AND REBUILD OF SECTIONS FOLLOWING FIRE DAMAGE
The Wellington 1 High Street Welwyn AL6 9LZ
Received 6 Aug 2009
Decided - Refused6/2017/1804/HOUSE
Erection of single storey front extension and porch, side extension at ground level,side extension at first floor level and installation of 3 rooflights to facilitate rear mansard loft conversion
79 Peplins Way Brookmans Park Hatfield AL9 7UT
Received 9 Aug 2017
Decided - Granted6/2017/1678/HOUSE
Erection of detached garage
3 Mill Green Cottages Mill Green Bush Hall Lane Hatfield AL9 5PB
Received 31 Jul 2017
Decided - Granted6/2017/1439/EM
Installation of 2 rear dormer windows to facilitate loft conversion
34 Parkway Welwyn Garden City AL8 6HQ
Received 3 Jul 2017
Decided - Granted6/2019/2145/HOUSE
Erection of first floor side extension, installation of 2 x rear dormers and rooflight to facilitate loft conversion and alterations to openings
7 Halifax Way Welwyn Garden City AL7 2QH
Received 29 Aug 2019
Decided - GrantedS6/2004/0450/FP
ERECTION OF PART TWO STOREY AND PART SINGLE STOREY REAR EXTENSION
6 Warren Close Hatfield AL10 0AL
Received 19 Mar 2004
Decided - GrantedS6/1974/7019/AD
Illuminated RAC Box Sign
Comet Hotel, St Albans Road West, Hatfield, AL10 9RH
Received 1 Jan 1974
Decided - Granted6/2020/1347/EMT
Fell 1 x Silver Birch Tree [T1]
43 Turmore Dale Welwyn Garden City AL8 6HT
Received 12 Jun 2020
Decided - Granted6/2016/0463/HOUSE
Erection of single storey rear extension
6 Hill Rise, Cuffley, Potters Bar, EN6 4EE
Received 21 Mar 2016
Decided - GrantedN6/2014/1258/FP
Erection of single storey rear extension following demolition of existing conservatory
6 Blakes Way Welwyn AL6 9RE
Received 4 Jun 2014
DecidedN6/2009/0099/TE
20% CROWN REDUCTION OF OAK TREE IN REAR GARDEN
11 ROUNDWOOD DRIVE, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 7JZ
Received 15 Jan 2009
Decided - Refused6/2019/0327/HOUSE
Retention of replacement roof and first floor front elevation wall and retention of first floor side extension, side elevation window and rear dormer
170 Crawford Road Hatfield AL10 0PA
Received 12 Feb 2019
Decided - GrantedW6/2004/1342/EM
ERECTION OF REAR CONSERVATORY & REAR SINGLE STOREY EXTENSION
21 Harwood Hill, Welwyn Garden City, AL8 7AA
Received 6 Sept 2004
Decided - Granted6/2021/1302/HOUSE
Erection of two storey side extension
4 Starling Lane Cuffley Potters Bar EN6 4JX
Received 22 Apr 2021
Decided - Refused6/2023/0424/PN15
Erection of a 15m high slim-line monopole with 3 no. antennas, 3 no. equipment cabinets and ancillary development
Hawkshead Lane North Mymms Brookmans Park Hatfield AL9 7TA
Received 23 Feb 2023
Decided - Granted6/2021/0259/EMT
Fell 1 x Oak tree but retain stump, fell 2 x Hornbeam trees, 1 x Acer tree, 1 x Oak tree to ground level with stumps removed
76 Brockswood Lane Welwyn Garden City AL8 7BQ
Received 27 Jan 2021
Decided - Granted6/2020/0115/HOUSE
Erection of conservatory
68 Great Ganett Welwyn Garden City AL7 3DE
Received 17 Jan 2020

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