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29,002 approved · 4,819 refused · 2,219 withdrawn.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 Counts reflect the last collected status; some records may be out of date.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

Decided - Withdrawn6/2017/0770/LAWP
Certificate of lawfulness for the erection of single storey rear extension
194 Knella Road Welwyn Garden City AL7 3NN
Received 18 Apr 2017
Decided - Granted6/2016/2241/TPO
Removal of Conifer tree - Conservation Area
The Grange 3 Codicote Road Welwyn AL6 9LY
Received 25 Oct 2016
Decided - Granted6/2025/1112/ADV
Replacement fascia sign
The Howard Centre Unit 30 Howardsgate Welwyn Garden City AL8 6HA
Received 10 Jun 2025
Decided - GrantedN6/2013/2128/FP
Erection of public house/restaurant, access, parking and associated works
Land at Bessemer Road, Welwyn Garden City, AL7 1HJ
Received 2 Oct 2013
Decided - GrantedS6/2013/1244/HH
Erection of single storey rear extension
29 Church Lane, Northaw, POTTERS BAR, EN6 4NX
Received 19 Jun 2013
Decided - GrantedC6/1987/0775/FP
Single storey rear extension
181 Blythway, Welwyn Garden City, AL7 1DS
Received 1 Jan 1987
Decided - GrantedS6/2007/0505/FP
RE-INSTATEMENT OF SINGLE DWELLING INTO TWO DWELLINGS
6-10 Fore Street Hatfield AL9 5AH
Received 26 Mar 2007
Decided - RefusedN6/2007/0349/LU
FIRST FLOOR FRONT EXTENSION AND SECOND FLOOR (LOFT) REAR EXTENSION.
22 Mardley Hill Welwyn AL6 0TS
Received 2 Mar 2007
Decided - Granted6/2023/0827/TPO
Silver Birch trees x 2. Crown reduction at 15% to allow light to reach solar panels TPO105 T4 TPO105 T5
5 Evergreen Close Woolmer Green Knebworth SG3 6JN
Received 18 Apr 2023
Decided - Withdrawn6/2024/1370/EM
Erection of part single, part two storey rear extension, part demolition of existing garage, alterations to openings and extension to driveway
29 Brockswood Lane Welwyn Garden City AL8 7BE
Received 17 Jul 2024
Decided - GrantedN6/2014/0383/FP
Erection of two storey rear extension, front porch and shed
53 Rowans, Welwyn Garden City, AL7 1NZ
Received 20 Feb 2014
Decided - Granted6/2018/1543/COND
Submission of details pursuant to condition 1 (material samples), 2 (scheme of landscaping), 3 (landscape management plan), 4 (tree protection details) and 6 (construction method statement) on planning permission 6/2017/0546/FULL
Land at Little Mead Hatfield AL10 0UH
Received 11 Jun 2018
Decided - GrantedN6/2015/1401/HOUSE
Erection of a single storey rear extension
79 Longcroft Lane Welwyn Garden City AL8 6EL
Received 30 Jun 2015
Decided - RefusedW6/2005/1358/EM
CONSTRUCTION OF RAMP TO FORM HARDSTANDING
121 Howlands, Welwyn Garden City, AL7 4RL
Received 27 Oct 2005
Decided - Granted6/2021/1339/FULL
Erection of dwelling following demolition of existing
44 Mymms Drive Brookmans Park Hatfield AL9 7AF
Received 26 Apr 2021
Decided - WithdrawnS6/2014/2039/FP
Erection of two storey side, single storey rear extension and rear dormer
33 Swanley Crescent, Little Heath, Potters Bar, EN6 1NQ
Received 15 Sept 2014
Decided - Granted6/2026/0190/HOUSE
Erection of single storey rear extension with mono pitch roof and rooflights and brick infill of existing front porch following the demolition of existing rear conservatory
10 Lowlands Hatfield AL9 5DY
Received 3 Feb 2026
Decided - WithdrawnN6/2004/1515/FP
INSTALLATION OF 5M LIGHTING COLUMNS TO GARAGE FORECOURTS
Garages 19-36 at Tudor Road Welwyn AL6 9JT
Received 8 Oct 2004
Decided - WithdrawnS6/2008/1689/FP
CHANGE OF USE FROM B1 (OFFICE) TO D1 (PLACE OF WORSHIP)
74-78 SECOND FLOOR CULPITT HOUSE, TOWN CENTRE, HATFIELD, HERTFORDSHIRE, AL10 0JW
Received 29 Aug 2008
Decided - Granted6/2020/1666/EMT
Fell 1 x Sycamore Tree Reduce 1 x hawthorn by 4m height & 1.5m width
16 Brockswood Lane Welwyn Garden City AL8 7BG
Received 10 Jul 2020
Decided - Granted6/2021/2715/HOUSE
Erection of a timber pergola in the rear garden (retrospective)
28 Sutherland Avenue Cuffley Potters Bar EN6 4EQ
Received 20 Sept 2021
Decided - GrantedN6/2007/1195/FP
ERECTION OF A SINGLE STOREY FRONT EXTENSION
14 Gwynfa Close Welwyn AL6 0PR
Received 7 Aug 2007
Decided6/2026/0135/TC
1 x Cherry to fell.
44 Longcroft Lane Welwyn Garden City AL8 6EF
Received 27 Jan 2026
Decided - GrantedW6/2004/0351/EM
ERECTION OF FIRST FLOOR SIDE EXTENSION
368 Knightsfield, Welwyn Garden City, AL8 7NG
Received 10 Mar 2004

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

View all applications

Get emailed about new planning applications in Welwyn Hatfield

Area alerts send a daily or weekly email with new applications and decisions near a postcode, filtered by project type. £29 a month, up to 3 areas. Records are limited to the councils we collect.

Set up an area alert

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