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

17,687Searchable applications

298Recorded as pending

86%Approval rate · 14,255 approved or refused records

1,964Refused applications

12,291 approved · 1,964 refused · 897 withdrawn.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 Counts reflect the last collected status; some records may be out of date.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 - Granted6/2021/3330/EMT
2 x Plum trees: to reduce by 1.5m height & 1.2m width
358 Knightsfield Welwyn Garden City AL8 7NG
Received 24 Nov 2021
Decided6/2023/0904/TC
Fell 1 x Willow (T1)
40 Attimore Road Welwyn Garden City AL8 6LP
Received 27 Apr 2023
Decided - Granted6/2022/0141/HOUSE
Erection of a first floor side extension
Tudorcrest 1 Osborne Gardens Little Heath Potters Bar EN6 1RS
Received 20 Jan 2022
Decided - Granted6/2025/0472/HOUSE
Erection of first floor front extension, part single part two storey rear extension, alteration of roof form into crown roof, alteration of fenestration and insertion of first floor side windows into the western flank elevation wall
6 Hill Rise Cuffley Potters Bar EN6 4EE
Received 13 Mar 2025
Decided6/2022/2360/TC
Reduce canopy of eucalyptus tree in rear garden by one third.
12 Barleycroft Green Welwyn Garden City AL8 6JY
Received 11 Oct 2022
Decided - Granted6/2020/2542/EMT
Crown reduction of 1 x Oak tree by 30%
6 Old Forge Close Welwyn AL6 0SR
Received 1 Oct 2020
Decided - Granted6/2020/2791/VAR
Variation of condition 2 (approved plans) on planning permission 6/2017/1902/FULL (allowed at appeal. Appeal ref: APP/C1950/W/18/3203353)
36 Salisbury Square Hatfield AL9 5AF
Received 26 Oct 2020
Decided - Granted6/2023/2365/EM
Retrospective permission for the replacement of garage doors and rear window
9 Handside Lane, Welwyn Garden City, AL8 6SE
Received 23 Nov 2023
Decided - Granted6/2025/1877/EMT
1 x Pear to reduce by approx 1m in height 1 x Beech to reduce by 1.5m height & width
15 The Valley Green Welwyn Garden City AL8 7DQ
Received 2 Sept 2025
Decided - Granted6/2023/1482/EMT
1 x Ash to fell to ground level. The tree is close to the council garages and the client has been asked by the council to remove it. The tree is causing damp and damage to the garage
215 Knightsfield Welwyn Garden City AL8 7QL
Received 17 Jul 2023
Decided - Granted6/2026/0810/EM
Erection of a part single-storey rear extension, part first-floor rear extension, and associated alterations to the existing dwelling in order to improve the internal arrangement and increase the amount of accommodation available for modern family occupation
78 Valley Road Welwyn Garden City AL8 7DP
Received 8 May 2026
Decided - Granted6/2025/2579/HOUSE
Erection of a part single and part two storey rear extension and alterations to fenestration and boundary treatment.
118 Ludwick Way Welwyn Garden City AL7 3PY
Received 15 Dec 2025
Decided - Granted6/2021/1154/EM
Two storey rear extension
29 Salisbury Road Welwyn Garden City AL7 3RR
Received 9 Apr 2021
Decided - Granted6/2023/0983/EM
Replacement of existing garage doors with electric steel up & over door
84 Parkway, Welwyn Garden City, AL8 6HL
Received 9 May 2023
Decided - Granted6/2024/1803/EM
Proposed Crossover and Hardstanding
136 Haldens Welwyn Garden City AL7 1DG
Received 18 Sept 2024
Decided - Granted6/2021/1374/HOUSE
Erection of a single storey rear extension to facilitate dining room.
9A London Road Knebworth SG3 6LG
Received 29 Apr 2021
Decided - Refused6/2020/3427/HOUSE
Erection of a loft conversion with new dormer to north elevation
16 Cubitts Close Digswell Welwyn AL6 0DZ
Received 22 Dec 2020
Decided - Refused6/2023/1499/HOUSE
Loft conversion with 2 dormers to rear and insertion of rooflight
16 Brockswood Lane Welwyn Garden City AL8 7BG
Received 18 Jul 2023
Decided6/2019/2183/TC
Fell 1 x Castlewelllan Leylandii tree
30 Attimore Road Welwyn Garden City AL8 6LP
Received 3 Sept 2019
Decided6/2024/1874/TC
1 x Sycamore to remove in sections to ground level. 1 x Silver Birch to remove 2 smaller stems to ground level. Reduce remaining tree by approximately 2m height and 1.2m width. 1 x Lawson cypress to remove to ground level.
26 Attimore Road Welwyn Garden City AL8 6LP
Received 30 Sept 2024
Decided - Withdrawn6/2020/2715/LAWP
Certificate of lawfulness for the erection of a single storey rear extension and replacement of garage door with window.
47 Mulberry Mead Hatfield AL10 9EH
Received 19 Oct 2020
Decided6/2018/3181/TPO
Repollard 4 x Common Lime trees back to previous points (T1, T2, T3 & T4)
9 Youngs Rise Welwyn Garden City AL8 6RT
Received 13 Dec 2018
Decided - Granted6/2020/2300/EM
Increase to existing area of hardstanding
9 Reddings Welwyn Garden City AL8 7LA
Received 8 Sept 2020
Decided - Granted6/2026/0454/EM
Outbuilding to include an office space and entertainment area
6 Brockett Close Welwyn Garden City AL8 7BN
Received 12 Mar 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