England · Local authority

Welwyn Hatfield Borough Council
Planning applications.

Explore collected planning applications and decisions for Welwyn Hatfield Borough Council. Search an address, application reference or proposal to find a record.

Collected application statistics

Collected records · All available dates

18,909Searchable applications

298Recorded as pending

86%Approval rate · 15,260 approved or refused records

2,128Refused applications

13,132 approved · 2,128 refused · 959 withdrawn. Received dates in our records: 5 Jan 2005 to 30 Sept 2026. Most recent record check: 11 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 Counts reflect the last collected status; some records may be out of date.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 - Granted6/2022/2503/LAWP
Certificate of lawfulness for a loft conversion with rear dormer, front roof lights and addition of side window
28 Thistle Drive Hatfield AL10 9FQ
Received 1 Nov 2022
Decided - Refused6/2019/1387/TPO
Fell 1 x Oak tree (T1) Reduce 1 X Deadwood
Cedar House Essendon Place High Road Essendon Hatfield AL9 6GZ
Received 10 Jun 2019
Decided - Granted6/2023/0777/HOUSE
Erection of a part single, part double storey rear extension, raising of roof of existing front porch to form a parapet and installation of a traditional canopy above front entrance. Widening of existing drive way to facilitate parking for two vehicles. Conversion of garage into habitable accommodation. Other landscape works.
27 High Oaks Road Welwyn Garden City AL8 7BJ
Received 11 Apr 2023
Decided - Granted6/2020/1780/FULL
12 month temporary extension for telecoms equipment
Welwyn Ambulance Station Ascots Lane Welwyn Garden City AL7 4HX
Received 21 Jul 2020
Decided - Granted6/2020/0609/HOUSE
Erection of side and rear extension, increase in ridge height with the formation of crown roof, front gable projection, front, side and rear dormers and granny annexe at ground floor
2A Kingswell Ride Cuffley Potters Bar EN6 4LH
Received 3 Mar 2020
Decided - Granted6/2026/0438/LB
Installation of ground floor timber casement window in connection with conversion of existing ground floor boiler room into a WC and utility room
Hornbeam House Ayot St Peter Road Ayot St Peter Welwyn AL6 9BG
Received 10 Mar 2026
Decided - Granted6/2026/1085/EMT
Fell 1 dead Rowan tree
20 Turmore Dale Welwyn Garden City AL8 6HS
Received 23 Jun 2026
Decided - Granted6/2019/1132/COND
Submission of details pursuant to conditions 1 (materials) 2 (landscaping) 3 (landscaping implementation) 4 (ecological enhancements) 5 (external lighting) 6 (permitted development) on planning application 6/2018/3151/FULL
Millers Carbone Hill Northaw SG13 8RG
Received 2 May 2019
Decided - Granted6/2021/3551/EMT
2 Lime trees - Routine tree maintenance crown reduction to previous pollard points by 8ft in height and up to between 4-6 feet in width on each side.
320 Knightsfield Welwyn Garden City AL8 7NQ
Received 30 Dec 2021
Decided - Granted6/2024/1080/PN8
Prior approval for the erection of a single storey rear extension measuring 6m in depth, 2.75m in height and 2.60m to the eaves
61 Homewood Avenue Cuffley Potters Bar EN6 4QQ
Received 11 Jun 2024
Decided6/2023/1460/COND
Seeking confirmation that condition 7 (contamination) on planning permission S6/2002/0967/FP has been discharged
40 Buttercup Close Hatfield AL10 9FG
Received 13 Jul 2023
Decided - Granted6/2024/0680/COND
Submission of details pursuant to condition number 4 Parts A (Site Characterisation) and B (Submission of Remediation Scheme) (Phase 2 only) on planning permission 6/2022/2249/VAR
Hertfordshire Constabulary Stanborough Road Welwyn Garden City AL8 6XF
Received 10 Apr 2024
Under Consideration6/2021/3308/S106DOV
Application to vary S106 Agreement dated 2 June 2016, Supplemental Deed dated 14 February 2017, S106 Agreements dated 30 January 2018 and 11 January 2019
Times Square (Former Rank Xerox Ltd site), Bessemer Road, Welwyn Garden City, Herts
Received 10 Nov 2021
Decided - Granted6/2025/0075/COND
Submission of details pursuant to condition 1 (Materials) on planning permission 6/2024/1191/HOUSE
1 Bacons Drive Cuffley Potters Bar EN6 4EF
Received 20 Jan 2025
Decided - Granted6/2023/2383/EMT
Tree crown reduction 2 x Apple tree (T1 and T3), 1 x Cherry tree (T2), 1 x Cherry Plum tree (T4). All to be crown reduced by 40% and branch thinned by 30% maximum
80 Handside Lane Welwyn Garden City AL8 6SJ
Received 27 Nov 2023
Appeal Decided - Dismissed6/2021/0504/FULL
Conversion of HMO dwelling to 2 x apartments, including single storey rear extension.
72 Aldykes Hatfield AL10 8EF
Received 16 Feb 2021
Decided - Granted6/2019/1478/HOUSE
Installation of windows to facilitate conversion of garage into habitable space
119 Campion Road Hatfield AL10 9FL
Received 19 Jun 2019
Decided - Granted6/2023/1630/TPO
T2 Oak to reduce by 20% or 2-3 metres to relieve weight on branches.
6 Canonsfield Road Welwyn AL6 0QH
Received 7 Aug 2023
Decided - Refused6/2019/0728/HOUSE
Installation of a dormer window to facilitate a loft conversion
111 Eddington Crescent Welwyn Garden City AL7 4SX
Received 27 Mar 2019
Decided - Granted6/2020/1385/EM
Raising of existing garage roof to facilitate conversion of existing garage into habitable space, insertion of roof light to existing single storey rear extension's roof, erection of a first floor rear extension and detached outbuilding
121 The Commons Welwyn Garden City AL7 4RZ
Received 16 Jun 2020
Decided6/2020/3342/TC
Crown Reduce 1 x Silver Birch [T1] by up to 20%
37 Woodland Rise Welwyn Garden City AL8 7LJ
Received 14 Dec 2020
Decided - Granted6/2026/0351/HOUSE
Erection of single storey porch extension, garage conversion, first floor front extension with replacement dormer roof, enlarged first floor rear dormers, reroofing whole roof with a slate coloured plain tile and rendering of front elevation
16 Marlborough Close Welwyn AL6 0UG
Received 26 Feb 2026
Decided - Refused6/2025/0260/COND
Submission of details pursuant to condition number 1 (Construction Management Plan), on planning permission 6/2022/1444/FULL
12 Harpsfield Broadway Hatfield AL10 9TF
Received 12 Feb 2025
Under Consideration6/2026/0122/FULL
The installation of electric vehicle infrastructure to convert existing diesel bus fleet to fully electric vehicles (EV)
University Bus Garage Gypsy Moth Avenue Hatfield AL10 9BS
Received 26 Jan 2026

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

View all applications

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