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

283Recorded as pending

86%Approval rate · 33,821 approved or refused records

4,819Refused applications

29,002 approved · 4,819 refused · 2,219 withdrawn. Received dates in our records: 29 Apr 1948 to 29 Oct 2026. Most recent record check: 8 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 Counts reflect the last collected status; some records may be out of date.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

Decided6/2022/0104/TC
T1 Oak tree - Reduce crown by 25% -30% (3 metres), and remove all large deadwood approx 2-4 inch diameter.
6 Honeycroft Welwyn Garden City AL8 6HR
Received 17 Jan 2022
Under Consideration6/2025/0603/MAJ
Phased rear extension to existing chocolate factory with additional parking area and associated works
61 London Road Knebworth SG3 6JE
Received 31 Mar 2025
Decided - Refused6/2020/3462/EM
Demolition of existing single storey side extension, construction two storey side extension and single storey rar extension
4 Hawthorns Welwyn Garden City AL8 7SE
Received 30 Dec 2020
Decided - Granted6/2017/2729/HOUSE
Erection of single storey rear extension following demolition of existing outbuilding
159 Parkway Welwyn Garden City AL8 6JA
Received 23 Nov 2017
Decided - Granted6/2025/0081/EMT
Remove lower branches from beech trees and fir tree up to max 2.5m that are over-hang a car parking area and neighbouring shed and garden. Reduce height of the fir and beech tree by 20% max
10 Blakemere Road Welwyn Garden City AL8 7PJ
Received 20 Jan 2025
Decided - GrantedN6/2012/2512/LUE
Certificate of lawfulness for existing garden room/outbuilding
2 Ruins Cottages, Hill Farm Lane, Ayot St Lawrence, WELWYN, AL6 9BU
Received 27 Nov 2012
Decided - GrantedW6/2004/0588/EM
ERECTION OF REAR CONSERVATORY
117 Howlands, Welwyn Garden City, AL7 4RL
Received 19 Apr 2004
Decided - Granted6/2016/0019/HOUSE
Formation of pitched roof to existing front porch and garage and installation of rooflight following partial conversion of garage and associated alterations
18 Sylvandale, Welwyn Garden City, AL7 2HT
Received 8 Jan 2016
Decided - GrantedN6/2015/1244/TC
Removal of three Leylandii trees, 1 Conifer tree and upto 20 Hawthorn trees along boundary line plus removal of Holly bush and 30% removal from unknown species
26 Brockswood Lane, Welwyn Garden City, AL8 7BG
Received 12 Jun 2015
Decided - Granted6/2023/1804/FULL
Installation of 40 ground mounted solar panels
Woodlands School Road Little Heath Potters Bar EN6 1JW
Received 29 Aug 2023
Decided - Granted6/2022/0606/EMT
Conifer Tree to be reduced by 50% due to excessive shading.
195 Handside Lane Welwyn Garden City AL8 6TE
Received 15 Mar 2022
Decided6/2026/0757/TC
1 x Hawthorn to lift to around 2m above ground level.
163 Parkway Welwyn Garden City AL8 6JA
Received 29 Apr 2026
Decided - Granted6/2019/2301/EM
Reduce group of Cypress trees by 5m
31 Marley Road Welwyn Garden City AL7 4BT
Received 17 Sept 2019
Decided - Withdrawn6/2017/1773/EM
Conversion of existing garage to utility and dining room
1 Mimram Place Welwyn AL6 9HQ
Received 11 Aug 2017
Decided - Granted6/2018/1865/HOUSE
Erection of single storey side and rear extensions, construction of rear patio with cover and erection of front porch following demolition of existing porch
176 Blythway Welwyn Garden City AL7 1DU
Received 17 Jul 2018
Decided - Split6/2020/3116/COND
Submission of details pursuant to conditions 3 (materials), 4 (crown roof), 5 (landscaping) and 6 (accessible housing) on planning permission 6/2019/1699/FULL
1 Roe Green Close, Hatfield, AL10 9PD
Received 23 Nov 2020
Decided - GrantedS6/2004/0389/FP
ERECTION OF CONSERVATORY TO SIDE ELEVATION
28 High Road Essendon Hatfield AL9 6HW
Received 16 Mar 2004
Decided - Granted6/2021/3540/HOUSE
Erection of single storey side extension following demolition of existing conservatory
20 Mardley Heights Welwyn AL6 0SX
Received 23 Dec 2021
Decided - Granted6/2023/1595/TPO
2 x Quercus ilex (evergreen oak) to lop back trespass by approximately 2 to 3m, pruning to a fork, growing point or bud, leaving a flowing branch line without stumps to BS3998:13.1 (due to trespass, shade and fence damage). TPO24 A3 (1976)
2 Mardley Heights Welwyn AL6 0TX
Received 1 Aug 2023
Decided - Granted6/2024/2291/HOUSE
Two storey side, part single storey side and rear extension, solar panels, following demolition of conservatory
11 Pentley Close Welwyn Garden City AL8 7SH
Received 28 Nov 2024
Decided - Granted6/2021/0521/VAR
Variation of condition 2 on planning permission 6/2020/2504/HOUSE.
The Pheasantry 3 Home Farm Road Hatfield AL9 7TP
Received 17 Feb 2021
Decided - Granted6/2016/2136/TPO
Reduce 2 x Sycamore trees by 3m in height and 2.5m in width - Conservation Area
60 Valley Road Welwyn Garden City AL8 7DN
Received 10 Oct 2016
Decided - Granted6/2022/2677/COND
Submission of details pursuant to condition 4 (hard and soft landscaping), 6 (tree protection plan and method statement), 8 (noise mitigation scheme) and 9 (waste storage) on planning permission 6/2021/1312/FULL
16 School Lane Welwyn AL6 9PH
Received 24 Nov 2022
Decided - Withdrawn6/2023/1454/TC
H1 - Beech Hedge to remove approximately 1m of beech hedge to widen the driveway for better access
51 Blakemere Road Welwyn Garden City AL8 7PQ
Received 13 Jul 2023

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

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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