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

23,272Searchable applications

313Recorded as pending

86%Approval rate · 18,988 approved or refused records

2,657Refused applications

16,331 approved · 2,657 refused · 1,200 withdrawn. Received dates in our records: 5 Jan 2005 to 2 Oct 2026. Most recent record check: 14 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 Counts reflect the last collected status; some records may be out of date.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

Appeal Decided - Dismissed6/2024/1307/HOUSE
Erection of a single storey rear extension, two-storey side extension and a loft conversion with rear dormer and insertion of front rooflights
59 Chelwood Avenue Hatfield AL10 0RF
Received 9 Jul 2024
Decided - Split6/2018/0282/COND
Approval of details pursuant to condition 2 (archaeological scheme of investigation), 3 (programme of archaeological works) and 4 (site investigation completion) on planning permission 6/2017/0344/HOUSE, dated 20/04/2017
5 Glebe Road Welwyn AL6 9PB
Received 26 Jan 2018
Decided - Granted6/2021/0704/EMT
Reduce 2 x Lawson Cypress in rear by 2.5m height. Reduce 2 x Lawson Cypress in front by 1.5m height
6 Digswell Court Digswell Rise Welwyn Garden City AL8 7PR
Received 3 Mar 2021
Decided - Granted6/2020/2446/HOUSE
Erection of a new single storey rear extension and first floor rear infill extension, following the demolition of existing conservatory.
47 Brookmans Avenue Hatfield AL9 7QH
Received 23 Sept 2020
Decided - Withdrawn6/2020/3102/HOUSE
Erection of single and two storey rear extension, garage conversion to habitable accommodation and enlargement of front driveway.
17 The Valley Green Welwyn Garden City AL8 7DQ
Received 23 Nov 2020
Decided - Granted6/2025/1493/HOUSE
Retention of outbuilding for use as annex
36 Holme Road Hatfield AL10 9LF
Received 8 Jul 2025
Decided - Refused6/2019/2976/EM
Erection of a single, part two storey rear extension, alterations to openings, installation of dropped kerb and formation of hardstanding
3 The Valley Green Welwyn Garden City AL8 7DQ
Received 26 Nov 2019
Decided - Granted6/2020/3361/HOUSE
Erection of a single storey rear extension and a single storey side/rear extension, following demolition of existing conservatory.
3 Hollybush Close Welwyn AL6 0PZ
Received 16 Dec 2020
Decided - Granted6/2021/0870/EMT
Fell 1 x Leyland Cypress
8 Graysfield Welwyn Garden City AL7 4BL
Received 17 Mar 2021
Decided - Granted6/2020/2559/EMT
Reduce 1 x Magnolia by 2m height and 1m width
81 Knightsfield Welwyn Garden City AL8 7JE
Received 2 Oct 2020
Decided - Withdrawn6/2022/2582/FULL
Laying of engineered surface for the provision of additional car parking and erection of fencing
Chancellors School Pine Grove Hatfield AL9 7BN
Received 11 Nov 2022
Decided - Granted6/2018/2858/HOUSE
Erection of single storey side extension - retrospective
11 Brickfield Hatfield AL10 8TN
Received 6 Nov 2018
Decided - Granted6/2025/0412/HOUSE
External wall insulation with render finish to all external walls
6 Calder Avenue Brookmans Park Hertfordshire AL9 7AQ
Received 19 Feb 2025
Decided - Granted6/2021/0819/FULL
Internal alterations to the dwelling to provide 1 x 1 bed flat and 1 x 2 bed flat, erection of ground floor rear extension, insertion of front entrance porch
13 Deerswood Avenue Hatfield AL10 8RX
Received 15 Mar 2021
Decided - Refused6/2019/3005/LAWE
Certificate of lawfulness for the existing use as a HMO (sui generis)
31 Blackthorne Close Hatfield AL10 9DS
Received 28 Nov 2019
Decided - Granted6/2023/0352/EMT
T1 Silver Birch 33% crown reduction and rebalance
34 Beehive Green Welwyn Garden City AL7 4BG
Received 15 Feb 2023
Decided - Granted6/2021/0700/HOUSE
Erection of single storey side extension and alterations to rear fenestration
48 Lowerfield Welwyn Garden City AL7 3JT
Received 3 Mar 2021
Decided - Granted6/2018/1523/HOUSE
Erection of single storey side extension
19 Cubitts Close Digswell Welwyn AL6 0DZ
Received 6 Jun 2018
Decided - Granted6/2021/2747/MAJ
Demolition of 7 x single storey structures, and the clearance, filling, relevelling and landscaping works to erect a public open space
5 The Frythe Frythe Avenue Welwyn AL6 9GG
Received 22 Sept 2021
Decided - Granted6/2025/0045/HOUSE
Erection of single rear extension
2 High Ridge Cuffley Potters Bar EN6 4JH
Received 14 Jan 2025
Decided - Granted6/2026/0256/EM
Replacement windows
424 Howlands Welwyn Garden City AL7 4HB
Received 13 Feb 2026
Decided6/2019/1225/TC
Fell 1 x Ash tree
6 Lytton Gardens Welwyn Garden City AL8 6EG
Received 21 May 2019
Decided - Granted6/2023/2168/EMT
Cherry plum tree - to fell due to safety concern. It has horseshoe fungus that can cause hollowing of the trunk and fall over in high wind.
3 Hurstlings Welwyn Garden City AL7 3LX
Received 24 Oct 2023
Decided - Granted6/2021/0638/EMT
Fell 1 x Ivy tree, reduce 1 x Plum tree by 2m in height and width
46 Corners Welwyn Garden City AL7 1RW
Received 26 Feb 2021

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