PlanningTrack
Get started

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
284Recorded 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29,002 approved · 4,819 refused · 2,219 withdrawn.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 Counts reflect the last collected status; some records may be out of date.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 buildingLocal plan Our Local PlanPre-application advice Pre-application advice (planning applications)Conservation areas Schedule of properties removed from the Welwyn Conservation AreaArticle 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

  1. Decided - Withdrawn6/2018/0071/HOUSE

    Erection of a two storey side extension with single storey front side and rear extensions

    15 Marlborough Close Welwyn AL6 0UG

    Received 9 Jan 2018
  2. Decided - GrantedS6/2004/1634/FP

    ERECTION OF TWO STOREY SIDE AND REAR EXTENSION

    28 Skimpans Close Welham Green Hatfield AL9 7PB

    Received 4 Nov 2004
  3. Decided6/2018/2621/TPO

    Reduce crown of 1 x Walnut tree with twin stem back to previous cuts approximately 10 -12 foot - covered by conservation area

    15 Mannicotts Welwyn Garden City AL8 7BW

    Received 12 Oct 2018
  4. Decided - Granted6/2018/2040/PN8

    Prior approval for the erection of a single storey rear extension, with flat roof to include insertion of 2 x roof lights in proposed roof, measuring 3.6m depth,2.9m height and 2.51m to the eaves

    10 Nutfield Welwyn Garden City AL7 1UL

    Received 6 Aug 2018
  5. Decided - GrantedN6/2013/2098/TP

    Fell every other sycamore and reduce remaining by 30% covered by TPO 266 G3.

    2 Harmer Dell Welwyn AL6 0BE

    Received 2 Oct 2013
  6. Decided - Granted6/2017/2628/HOUSE

    Installation of 4 x dormer windows, (2 to each side), rear juliet balcony and doors following demolition of rear window to facilitate loft conversion

    15 Burleigh Way Cuffley Potters Bar EN6 4LJ

    Received 10 Nov 2017
  7. Decided - GrantedN6/2005/1237/FP

    PROPOSED SINGLE STOREY REAR EXTENSION

    24 Colgrove Welwyn Garden City AL8 6HU

    Received 4 Oct 2005
  8. Decided - Granted6/2020/3164/COND

    Submission of details pursuant to conditions 1 (materials) and 2 (boundary treatment) on planning permission 6/2019/0536/FULL

    66 Tolmers Road Cuffley Potters Bar EN6 4JY

    Received 25 Nov 2020
  9. Decided - Granted6/2018/0131/HOUSE

    Erection of a summerhouse to replace existing shed

    5 Howicks Green Welwyn Garden City AL7 4RJ

    Received 15 Jan 2018
  10. Decided - Refused6/2016/1829/HOUSE

    Erection of single storey side extension, side facing dormer window, single storey rear infill extension, roof alterations, roof light, sky light, conversion of garage and replacement of existing garage door with window.

    151 Campion Road Hatfield AL10 9FL

    Received 5 Sept 2016
  11. Decided - Granted6/2022/0160/HOUSE

    Erection of a single storey side/front infill extension

    40 Harmer Green Lane Digswell Welwyn AL6 0AT

    Received 21 Jan 2022
  12. Decided - RefusedN6/2004/1539/FP

    ERECTION OF FIRST FLOOR SIDE EXTENSION

    76 Longcroft Lane Welwyn Garden City AL8 6EF

    Received 13 Oct 2004
  13. Decided - GrantedN6/2009/2649/FP

    Erection of two storey and single storey rear extension

    104 SLOANSWAY, WELWYN GARDEN CITY, HERTS, AL7 1ND

    Received 7 Dec 2009
  14. Decided6/2023/1213/TC

    Fell 1 x dead Eucalyptus - fell to ground level & grind stump.

    48 Fordwich Road Welwyn Garden City AL8 6EY

    Received 8 Jun 2023
  15. Decided - GrantedN6/2014/2783/FP

    Erection of part single storey and part two storey rear extension. Link side extension, fence to flank boundary and block paving of existing driveway

    29 Roundwood Drive, Welwyn Garden City, AL8 7JZ

    Received 23 Dec 2014
  16. Decided - Granted6/2016/1664/LAWP

    Certificate of lawfulness for the conversion of garage into home office

    64 Peplins Way, Brookmans Park, Hatfield, AL9 7UU

    Received 15 Aug 2016
  17. Decided - Granted6/2020/0808/HOUSE

    Erection of a single storey side and rear infill extension

    46 Harmer Green Lane Digswell Welwyn AL6 0AT

    Received 30 Mar 2020
  18. Decided - GrantedN6/2009/1326/FP

    ERECTION OF DETACHED GARAGE WITH FIRST FLOOR STORAGE SPACE AND DRIVEWAY/VEHICLE ACCESS ALTERATION

    BARFREY HOUSE, BROCKET ROAD, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 7TT

    Received 22 Jun 2009
  19. Decided - GrantedS6/2006/0636/FP

    SINGLE STOREY SIDE GARAGE & SINGLE STOREY REAR EXTENSION AND FRONT PORCH

    17 Sycamore Avenue Hatfield AL10 8LZ

    Received 17 May 2006
  20. Decided - Granted6/2019/0275/LAWP

    Certificate of lawfulness for a loft conversion

    17 Frampton Road Little Heath Potters Bar EN6 1JF

    Received 6 Feb 2019
  21. Decided - Granted6/2016/1801/TPO

    Removal of Four Deciduous trees covered by TPO 585 (2016)

    High Trees Leggatts Park Great North Road Little Heath Potters Bar EN6 1NZ

    Received 2 Sept 2016
  22. Decided - RefusedN6/2014/1420/FP

    New garage in front garden

    11A Chestnut Walk Welwyn AL6 0SB

    Received 25 Jun 2014
  23. Decided - WithdrawnN6/2008/0686/FP

    ROOF EXTENSION TO PROVIDE TWO, ONE BEDROOM SELF-CONTAINED FLATS

    61 HOWARDSGATE, WELWYN GARDEN CITY, HERTFORDSHIRE, AL8 6BB

    Received 5 Apr 2008
  24. Decided - Granted6/2023/1473/EMT

    Removal of columnal Cherry tree in front garden that is half dead and affected by honey fungus Pollard back to previous pruning points and removal of dead branches on Evodia Danielli (Korean Bee Bee Tree) at corner of plot with Valley Green. This has not been attended to for 6-8 years and is now as high as the nearby Horse Chestnut

    30 Valley Road Welwyn Garden City AL8 7DN

    Received 17 Jul 2023

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

View all applications

Applications by postcode area

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 Updated

  • 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 Updated

  • 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 Updated

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

More planning authorities in England

Browse all authorities