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

35,025Searchable applications

313Recorded as pending

87%Approval rate · 29,167 approved or refused records

3,894Refused applications

25,273 approved · 3,894 refused · 1,825 withdrawn. Received dates in our records: 29 Apr 1948 to 14 Oct 2026. Most recent record check: 22 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 Counts reflect the last collected status; some records may be out of date.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 - Granted6/2025/2089/EM
Installation of 14 all-black solar photovoltaic (PV) panels on the roof slope
163 Heronswood Road Welwyn Garden City AL7 3EJ
Received 1 Oct 2025
Decided - Granted6/2024/2128/HOUSE
Erection of single storey rear infill extension, part first floor rear extension
10 Birch Drive Hatfield AL10 8NX
Received 5 Nov 2024
Decided - Granted6/2019/2708/COND
Submission of details pursuant to condition 3 (penetrative methods) and 4 (borehole management scheme) on planning permission 6/2018/0171/MAJ
Former Shredded Wheat Factory Welwyn Garden City AL8 6UN
Received 28 Oct 2019
Decided - RefusedS6/2013/1450/FP
Retention of hip to gable roof extension on both sides, and proposed 2 front dormer windows with pitched roof features
6 Hawkshead Lane, North Mymms, Hatfield, AL9 7TB
Received 18 Jun 2013
Decided6/2020/1554/TC
Reduce Lombardy Poplar tree by 30% and remove deadwood
1 Elmwood Welwyn Garden City AL8 6LD
Received 30 Jun 2020
Decided - Granted6/2016/2307/COND
Approval of details reserved by condition 2 (Noise) on planning permission 6/2016/1479/FULL
Charter House, Parkway, Welwyn Garden City, AL8 6JL
Received 2 Nov 2016
Decided - GrantedW6/2008/1783/EM
ERECTION OF SATELLITE DISH.
26 CROSSWAY, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 7EE
Received 18 Sept 2008
Decided - Split6/2025/2046/COND
Submission of details pursuant to Condition 9 (Boreholes) & 10 (Intrusive Groundworks) on planning permission 6/2024/1866/FULL
51 Welham Manor Welham Green Hatfield AL9 7EL
Received 25 Sept 2025
Decided - Granted6/2024/2265/LAWP
Certificate of lawfulness for a proposed detached outbuilding in rear garden
22 Mymms Drive Brookmans Park AL9 7AF
Received 25 Nov 2024
Decided - Granted6/2016/1696/HOUSE
Erection of rear conservatory
91 Crawford Road Hatfield AL10 0PF
Received 18 Aug 2016
Decided - Granted6/2024/2108/LAWP
Certificate of lawfulness for the installation of a new perimeter fence around the north-western and south-western boundaries of the existing Affinity Water Limited (AWL) site
The Hub Tamblin Way Hatfield AL10 9EZ
Received 31 Oct 2024
Decided6/2020/0688/TC
Fell 1x Yew tree
9 Welwyn Hall Gardens Welwyn AL6 9LF
Received 11 Mar 2020
Decided - Granted6/2018/1498/FULL
Installation of new plant and machinery to enable new water treatment process at existing treatment plant and all associated works at site of recently demolished plant building to include: Single actiflo Carb 5 unit, Actiflo Carb Recycl Pumps and hydrocyclone, PAC Storage Silo and conveyor system, New plant building, Wastewater recovery plant and New kiosk housing a new motor control centre
North Mymms Water Treatment Site, Warrengate Road, Brookmans Park, Hatfield, AL10 9EZ
Received 5 Jun 2018
Decided - Granted6/2025/2380/LAWP
Certificate of lawfulness for the erection of a garden office
17 Great Braitch Lane Hatfield AL10 9FD
Received 12 Nov 2025
Decided6/2025/2618/TC
1 x Apple to reduce by around 2m height and width. 1 x Holly to reduce by round 1m.
22 Dellcott Close Welwyn Garden City AL8 7BD
Received 23 Dec 2025
Appeal Decided - DismissedN6/2008/1259/TP
T1 OAK TO BE FELLED AND T2 OAK TO BE REDUCED BY 30%.
8 Mardley Wood Welwyn AL6 0UX
Received 22 Jul 2008
Decided - Granted6/2020/0653/LAWP
Certificate of lawfulness for erection of a front porch
54 Cecil Crescent Hatfield AL10 0HG
Received 9 Mar 2020
Decided - GrantedS6/2008/2472/DS
Discharge of conditions 2 (Materials), 3 (joinery), 4 (Weatherboarding), 5 (Brickwork), 6 (Window & Door details) of application S6/2007/1679/FP & S6/2007/1687/LB & conditions 7 (Sustainability), 8 ( Cycle storage), 11 (Landscaping),13 (Lighting), 15 (Rainwater goods), 17 (Storage) of application S6/2007/1679/FP & condition 8 (Rainwater goods) of application S6/2007/1687/LB
THE WALLED GARDEN, HATFIELD PARK ESTATE, HATFIELD, HERTFORDSHIRE, AL9 5NB
Received 29 Dec 2008
Decided - GrantedN6/2015/0626/TC
Removal of Robinia tree and Garia Elyptica bush
76 Longcroft Lane, Welwyn Garden City, AL8 6EF
Received 25 Mar 2015
Decided - Granted6/2026/1130/TPO
G1 - 2 x Beech and 3 x Hornbeams all hanging low over the footpath and road. Crown lift to 4m. T2 - Hornbeam growing very close to the building and low over the drive. To reduce back on building side by 1.5m and crown lift over the road to 4m. (Covered by TPO 724 (2018) W1)
Perrywood Walden Road Welwyn Garden City AL8 7PZ
Received 30 Jun 2026
Decided - GrantedW6/2009/0043/EM
ERECTION OF FIRST FLOOR SIDE EXTENSION
158 HOWLANDS, WELWYN GARDEN CITY, HERTFORDSHIRE, AL7 4RG
Received 8 Jan 2009
Decided - Refused6/2023/1005/HOUSE
Erection of a single storey rear extension and double garage following the demolition of existing single garage
19 Mimram Road Welwyn AL6 9HA
Received 11 May 2023
Decided - Granted6/2017/1262/HOUSE
Erection of a single storey rear extension and extension to terrace following demolition of existing conservatory
Lagern, Vineyards Road, Northaw, Potters Bar, EN6 4PH
Received 9 Jun 2017
Decided - Granted6/2016/0674/HOUSE
Single storey rear infill extension, two storey side infill extension and loft conversion
10 Ground Lane Hatfield AL10 0HH
Received 12 Apr 2016

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.
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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.
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