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

23,102Searchable applications

313Recorded as pending

86%Approval rate · 18,834 approved or refused records

2,642Refused applications

16,192 approved · 2,642 refused · 1,193 withdrawn.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 Counts reflect the last collected status; some records may be out of date.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

Decided - Granted6/2020/0588/HOUSE
Erection of single storey rear extension and conversion of garage into habitable space
28 Burleigh Way Cuffley Potters Bar EN6 4LG
Received 2 Mar 2020
Decided - Granted6/2023/2059/EM
Erection of children's climbing frame to replace rotten existing decking
35 Elmwood Welwyn Garden City AL8 6LD
Received 9 Oct 2023
Decided - Granted6/2023/1672/EM
Installation of solar photovoltaic panels and an air source heat pump (ASHP) to the rear of the property
16 High Oaks Road Welwyn Garden City AL8 7BH
Received 10 Aug 2023
Under Consideration6/2023/2503/COND
Submission of details pursuant to condition number 44 (Phasing Details), on planning permission 6/2018/0171/MAJ
Former Shredded Wheat Factory Welwyn Garden City AL8 6UN
Received 14 Dec 2023
Decided - Granted6/2018/0842/PN8
Prior approval for the erection of a single storey rear extension measuring 3.60m in depth and 2.72m in height
240 Daniells Welwyn Garden City AL7 1QQ
Received 29 Mar 2018
Decided - Granted6/2021/2166/HOUSE
Erection of single storey rear extension
45 Stag Green Avenue Hatfield AL9 5EB
Received 16 Jul 2021
Decided - Granted6/2017/2191/COND
Submission of details pursuant to condition 3 (Materials),4 (parking and turning provision) ,5 (refuse/recycling and cycle storage) and 6 (hard and soft landscaping) on planning permission 6/2016/1778/FULL, granted on appeal APP/C1950/W/17/3173234, dated 17/07/2017
11 Brookmans Avenue Brookmans Park Hatfield AL9 7QH
Received 27 Sept 2017
Decided - Refused6/2021/3374/HOUSE
Alterations to the roof including a hip to gable alteration/ increase in roof height to alter the existing double pitch to a single pitch along with the addition of a rear facing dormer
34 Brocket Road Welwyn Garden City AL8 7TY
Received 30 Nov 2021
Decided - Granted6/2020/2944/VAR
Variation of condition 14 (approved plans) on planning permission 6/2018/3125/FULL
12 Tolmers Gardens Cuffley Potters Bar EN6 4JE
Received 10 Nov 2020
Under Consideration6/2026/1163/LB
Conversion of Warren Farm Barn
Brocket Park Brocket Hall Marford Road Lemsford Welwyn Garden City AL8 7XG
Received 6 Jul 2026
Decided6/2018/3199/TPO
Fell 1x Eucalyptus tree -Conservation Area
11 Wilkins Grove Welwyn Garden City AL8 6JS
Received 17 Dec 2018
Decided - Granted6/2021/0426/TPO
Reduce G5, T18 and T9 and Sycamore and Hornbeam on the boarder by 40%. T2 Oak Tree remove all ivy and reduce height and spread by 40%, Oak tree by shed to reduce height and spread by 40%. T3 Scots Pine to fell, 2 Sycamore on boarder with neighbouring houses at rear to fell and T21 Chestnut to pollard back to previous points.
14 Turpins Chase Welwyn AL6 0RA
Received 10 Feb 2021
Decided - Granted6/2018/1372/EM
Erection of a single storey rear extension
60 The Commons Welwyn Garden City AL7 4RS
Received 23 May 2018
Decided - Withdrawn6/2018/2916/EM
Erection of single storey rear extension
8 Summer Dale Welwyn Garden City AL8 7QJ
Received 13 Nov 2018
Decided - Granted6/2020/3264/HOUSE
Demolition of existing conservatory and erection of single storey timber and brick conservatory with a flat roof, roof light and clear double glazing.
Hyde Cottage 16-18 Cromer Hyde Lane Lemsford Welwyn Garden City AL8 7XE
Received 4 Dec 2020
Decided - Granted6/2022/2254/EM
Erection of a single storey front extension
7 Blakemere Road Welwyn Garden City AL8 7PQ
Received 28 Sept 2022
Decided - Granted6/2020/1453/EM
Replace 4 metres of rear garden hedging on boundary with wooden panelling where the hedge meet the property.
30 Digswell Road Welwyn Garden City AL8 7PA
Received 22 Jun 2020
Decided - Granted6/2025/2141/PN8
Prior approval for the erection of a single storey rear extension measuring 8m in depth, 4m in height and 2.4m to the eaves
19 The Avenue Welwyn AL6 0PW
Received 8 Oct 2025
Decided - Withdrawn6/2018/2440/EM
Single storey rear extension
251 Knightsfield Welwyn Garden City AL8 7RA
Received 24 Sept 2018
Decided - Granted6/2025/0733/COND
Submission of details pursuant to Condition 2 (Construction Management Plan) on planning permission 6/2020/3420/MAJ
BioPark Broadwater Road Welwyn Garden City AL7 3AX
Received 16 Apr 2025
Decided - Granted6/2023/0531/HOUSE
Erection of single storey rear extension
15 Dawley Welwyn Garden City AL7 1EA
Received 9 Mar 2023
Decided - Granted6/2023/1243/EM
Garage conversion with replacement of garage door to window and garden room
30 Heather Road Welwyn Garden City AL8 6XU
Received 12 Jun 2023
Decided - Granted6/2022/0465/EM
Erection of replacement 6ft 6 fence behind privet hedge with gate.
2 Broadfield Place Welwyn Garden City AL8 6LJ
Received 28 Feb 2022
Decided - Refused6/2019/1226/HOUSE
Erection of a single storey rear extension and porch
13 Birdcroft Road Welwyn Garden City AL8 6EH
Received 21 May 2019

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