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29,002 approved · 4,819 refused · 2,219 withdrawn.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: 9 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 Counts reflect the last collected status; some records may be out of date.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

Decided - Split6/2023/1919/COND
Submission of details pursuant to condition 1 (construction traffic management plan), 3 (refuse and recycling storage), 4 (hard and soft landscape) and 5 (cycle infrastructure) on planning permission 6/2023/0731/FULL
34B High Street Welwyn AL6 9EQ
Received 15 Sept 2023
Decided - Granted6/2022/2110/HOUSE
Erection of ground floor rear extension and window replacements
10 Dognell Green Welwyn Garden City AL8 7BL
Received 12 Sept 2022
Decided6/2025/0240/TC
1 x Norway Maple to reduce by approximately 2.5m in height and 1.5m in width (back to previous) To maintain size and shape suitable for the area
34 Heather Road Welwyn Garden City AL8 6XU
Received 11 Feb 2025
Decided - GrantedN6/2015/0204/FP
Erection of single storey rear extension and dormer window
43 Twin Foxes Woolmer Green Knebworth SG3 6QT
Received 2 Feb 2015
Decided - GrantedN6/2013/0862/DS
Discharge of conditions 3 (Landscaping), 5 (Materials), 6 (Refuse and Recycling), 7 (Floor Levels), 8 (Water and Energy Efficiency) and 9 (Insulation and Attenuation Measures) from planning application N6/2010/1963/FP
20 The Avenue Welwyn AL6 0PP
Received 22 Apr 2013
DecidedS6/2015/0837/NM
Non material amendment following approval of planning permission S6/2013/0568/FP - Replace flat roof with Thermal insulation, remove existing balcony, balustrade and ironwork. Remove door to balcony on First floor, brick half height and extend UPVC windows across full length of existing opening and permit projection of the new flat roof by maximum of 500mm to provide storm/weather protection to front door
48 The Ryde, Hatfield, AL9 5DL
Received 17 Apr 2015
Decided - Granted6/2022/2384/EMT
Vertical Birch - Crown reduction - 25% general reduction of misshapen branches to rebalance tree.
26 Great Dell Welwyn Garden City AL8 7HY
Received 13 Oct 2022
Decided - Granted6/2019/2144/COND
Submission of details pursuant to condition 2 (Materials) on planning permission 6/2018/1573/HOUSE
41 Valley Road Welwyn Garden City AL8 7DH
Received 27 Aug 2019
Decided - Granted6/2026/1052/FULL
Retention of an extension to the existing building and the erection of a rear extension following demolition of existing buildings (part retrospective)
Unit 3 Woodside Lane Hatfield AL9 6DE
Received 17 Jun 2026
Decided - GrantedS6/2004/1415/FP
TWO STOREY SIDE EXTENSION
15 Heyford Way Hatfield AL10 0AT
Received 22 Sept 2004
Under Consideration6/2026/1357/MAJ
Erection of 109 residential units with access, parking, hard and soft landscaping, public open space and associated works following the demolition of all existing buildings and structures on site
Former Big Cat Sanctuary Codicote Road Codicote AL6 9TU
Received 31 Jul 2026
Decided - GrantedN6/2010/0090/TE
BRANCHES OF OAK TREE TO BE PRUNED
7 HAWTHORNS, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 7SE
Received 22 Jan 2010
Decided - Withdrawn6/2021/3223/TPO
1 x Oak to remove major deadwood throughout canopy and reduce limbs growing towards property by 1.2m. Remove Ivy to a height of 3m.
5 Mardley Heights Welwyn AL6 0TX
Received 10 Nov 2021
Decided - Granted6/2023/0578/EMT
1 x Ash to reduce by 2m in height and 1.2m in width 1 x Crab apple to reduce by 1m in height and 1.2m in width.
6 Colgrove, Welwyn Garden City, AL8 6HU
Received 14 Mar 2023
Decided - GrantedN6/2007/1611/FP
ERECTION OF TWO STOREY REAR AND FIRST FLOOR SIDE EXTENSIONS
12 MENDLESHAM, WELWYN GARDEN CITY, HERTFORDSHIRE, AL7 2QG
Received 26 Oct 2007
Decided - Granted6/2020/0273/TPO
Crown reduction 1x Oak tree (T3) by 2.5m in width and 3.m in height
8 The Drive Welwyn AL6 0TR
Received 30 Jan 2020
Decided - GrantedN6/2009/2343/DS
DISCHARGE OF CONDITION 3 (LANDSCAPING) FROM PLANNING PERMISSION N6/2009/2133/S73B
1 Douglas Close Digswell Welwyn AL6 0DT
Received 22 Oct 2009
Decided - Granted6/2024/0870/EM
Like for like replacement windows
5 Attimore Close Welwyn Garden City AL8 6LN
Received 8 May 2024
Decided - Granted6/2021/2776/LAWP
Certificate of lawfulness for alterations to existing roof to allow for dormer window to the rear elevation and roof lights to the front elevation
32 Twelve Acres Welwyn Garden City AL7 4FN
Received 27 Sept 2021
Decided - Refused6/2015/2559/EM
Erection of two storey side extension and single storey side conservatory
1 Hawthorns, Welwyn Garden City, AL8 7SE
Received 24 Dec 2015
Under Consultation6/2026/1731/HOUSE
Erection of a basement extension, fenestration alteration and wall and roof replacement
Lakeside Manor West End Lane Essendon Hatfield AL9 6AZ
Received 30 Sept 2026
Decided6/2022/1935/TC
G1 - Mixed Species Group - Located in rear garden overhanging from neighbouring garden at 14 Beehive Green (which is in a conservation area) Trees are encroaching onto garden - Would like to reduce lateral overhang removing up to 2m Please Note I am aware this is an EMS area also but have contacted them directly and the works will not require an application to them. I will upload a copy of the email.
138 Cole Green Lane Welwyn Garden City Hertfordshire AL7 3JE
Received 18 Aug 2022
Decided - Granted6/2024/1435/PN8
Prior approval for the erection of a single storey rear extension measuring 3.33m in depth, 2.90m in height and 2.53m to the eaves
66 Hillfield Hatfield AL10 0TU
Received 30 Jul 2024
Decided - Granted6/2025/0117/HOUSE
Erection of a two storey rear extension, following the demolition of existing extension. Alterations to existing hipped gable and the replacement of existing dormer windows to the rear elevation with a single box dormer
21 Hillside Way Welwyn AL6 0TY
Received 24 Jan 2025

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

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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.
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Published 16 Jul 2026Updated 13 Sept 2026
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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.
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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.
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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.

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