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29,002 approved · 4,819 refused · 2,219 withdrawn.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 Counts reflect the last collected status; some records may be out of date.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 - Granted6/2020/1058/HOUSE
Erection of single storey side and rear extension
1 Crawford Road Hatfield AL10 0PF
Received 12 May 2020
Decided - Granted6/2024/0045/TPO
Tree T1 - Sweet Chesnut in the site plans - trim of canopy to original growth points and removal of epicormic growth on the trunk. Tree T2 - English Oak - trim of canopy to original growth points and removal of epicormic growth on the trunk. TPO 640 (2017)
22 Mardley Hill Welwyn AL6 0TS
Received 8 Jan 2024
Decided - GrantedW6/2006/0488/EM
ERECTION OF SINGLE STOREY REAR AND TWO STOREY SIDE EXTENSIONS
399 Knightsfield, Welwyn Garden City, AL8 7LY
Received 12 Apr 2006
Decided - Granted6/2019/0283/PN8
Prior approval for erection of single storey rear extension measuring 3.5m in depth, 3.4m in height and 2.9m to the eaves
18 Gorseway Hatfield AL10 9GS
Received 6 Feb 2019
Decided - Granted6/2017/2840/EM
Erection of two-storey side extension and single-storey extension with flat roof.
2 Sandpit Road Welwyn Garden City AL7 3TN
Received 5 Dec 2017
Decided - Granted6/2025/0450/EMT
T1 Crab Apple crown reduction to reduce height and spread by 2m
9 Elmwood Welwyn Garden City AL8 6LD
Received 11 Mar 2025
Decided6/2020/2266/TC
T1 Liquid Amber crown reduction by approx 30% T2 Hornbeam crown reduction of approx 2m from branch tips T3 Maple crown reduction by approx 50cms from branch tips T4 dead Mountain Ash to fell.
19 Roundwood Drive Welwyn Garden City AL8 7JZ
Received 3 Sept 2020
Decided - Withdrawn6/2022/2797/FULL
Erection of electricity substation
YMCA 90 Peartree Lane Welwyn Garden City AL7 3UL
Received 9 Dec 2022
Decided - Granted6/2024/0904/HOUSE
Erection of two storey rear extension with Juliet balcony, raising roof height to form a new pitched roof with side dormers, rooflights and alterations to the fenestration
60 King James Avenue Cuffley Potters Bar EN6 4LP
Received 15 May 2024
Decided - GrantedS6/2013/2116/DS
Discharge of condition 3 (approved plans), 4 (sample materials) for planning permission S6/2013/671/LB - Alterations to the Mymms Room within the Mansion House to remove existing bedroom and en-suite bathroom. To be re-instated as an open area to provide a formal meeting room
MANSION HOUSE NORTH MYMMS PARK, Tollgate Road, North Mymms, Hatfield, AL9 7TR
Received 3 Oct 2013
Decided - Granted6/2017/0009/LAWP
Certificate of lawfulness for erection of single storey rear extension
26 Welham Manor Welham Green Hatfield AL9 7EL
Received 4 Jan 2017
Decided - Granted6/2017/2829/LAWP
Certificate of lawfulness for the conversion of loft to habitable room
45 The Meadway Cuffley Potters Bar EN6 4ET
Received 1 Dec 2017
Decided - Granted6/2015/1457/PN8
Prior approval for the erection of single storey rear extension measuring 5.606m deep, 2.35m high and 2.35m to the eaves
76 Brookside Crescent Cuffley Potters Bar EN6 4QJ
Received 7 Jul 2015
Decided - Granted6/2022/1326/COND
Submission of details pursuant to Condition 1 (Ecology Report) on planning permission 6/2021/1577/HOUSE
26 Bluebridge Road Brookmans Park Hertfordshire AL9 7SA
Received 8 Jun 2022
Decided - Granted6/2016/1974/HOUSE
Erection of double storey side and single storey rear extension with installation of 1no. rooflight and alterations to openings
35 Astwick Avenue Hatfield AL10 9LB
Received 26 Sept 2016
Decided - Split6/2017/2434/COND
Submission of details pursuant to conditions 3 (Drainage Scheme), 4 (Construction Management Plan), 5 (Approved Scheme of Remediation), 8 (Indoor Ambient Noise), and 13 (Details of External Light) on planning permission 6/2016/2624/FULL
Mercury House 1 Broadwater Road Welwyn Garden City AL7 3BQ
Received 23 Oct 2017
Decided - GrantedS6/2009/1728/FP
ERECTION OF SINGLE STOREY EXTENSION AND INSTALLATION OF NEW FIRE DOOR
Burvill House Surgery 52-54 Dellfield Road Hatfield AL10 8HP
Received 7 Aug 2009
Decided6/2026/1114/TC
Cut back Norway spruce back to the boundary that is growing over from number 28's garden.
30 Barleycroft Road Welwyn Garden City AL8 6JU
Received 29 Jun 2026
Decided6/2022/2767/TC
T1-Oak-Crown reduce by 2-3 metres to maintain size and shape T2-Twin-stemmed Conifer- Fell to ground level as it has outgrown its position T3-Sycamore-Fell to ground level as its outgrown its position T4-Plum group-Cut back and prune to maintain size and shape T5-Multi-stemmed Sycamore-Cut back from tennis courts in neighbouring garden by 1-2 metres as the branches overhang the courts
41 Turmore Dale Welwyn Garden City AL8 6HT
Received 6 Dec 2022
Decided - Granted6/2020/3340/LAWE
Certificate of lawfulness for residential use of land in association with The Cottage, Foxes Lane.
The Cottage Foxes Lane Hatfield AL9 7BA
Received 14 Dec 2020
Decided - GrantedS6/2013/1441/FP
Formation of vehicular crossover and resurface existing driveway
12 Moffats Lane, Brookmans Park, Hatfield, AL9 7RU
Received 5 Jul 2013
Decided - Withdrawn6/2025/1730/FULL
Erection of new dwelling and associated hard and soft landscaping
Land to Rear of 63 Pine Grove Brookmans Park AL9 7BL
Received 14 Aug 2025
Decided - GrantedS6/2013/2422/FP
Erection of single storey rear extension following demolition of existing conservatory and store room
2 Hornbeam Lane, Essendon, Hatfield, AL9 6JF
Received 12 Nov 2013
Decided - Granted6/2019/1252/HOUSE
Erection of single storey front extension, infill garage to property to facilitate conversion of garage into habitable space
7 The Brambles Welwyn Herts AL6 0PG
Received 20 May 2019

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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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