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England · Local authority

Welwyn Hatfield Borough Council
Planning applications.

Explore collected planning applications and decisions for Welwyn Hatfield Borough Council. Search an address, application reference or proposal to find a record.

Collected application statistics

Collected records · All available dates
33,567Searchable applications
313Recorded as pending
87%Approval rate · 28,097 approved or refused records
3,676Refused applications

24,421 approved · 3,676 refused · 1,746 withdrawn. Received dates in our records: 29 Apr 1948 to 14 Oct 2026. Most recent record check: 21 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 Counts reflect the last collected status; some records may be out of date.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 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 - Granted6/2015/2420/HOUSE

    Erection of a single storey side extension and removal of existing conservatory

    Doubledoors 3 Pottersheath Road Welwyn AL6 9SY

    Received 1 Dec 2015
  2. Decided - Granted6/2020/2013/HOUSE

    Erection of single storey rear extension

    2 The Drive Ponsbourne Park Newgate Street Hertford SG13 8QS

    Received 11 Aug 2020
  3. Decided - Refused6/2019/0164/COND

    Submission of details pursuant to condition 4 (approved plans) on planning permission N6/2011/0359/OP

    Site of Queen Elizabeth II Hospital Howlands Welwyn Garden City AL7 4HQ

    Received 28 Jan 2019
  4. Decided - Granted6/2025/0902/EM

    Solar panels as part of the Solar Together scheme promoted by the council. 8 panels front, 8 Panels Back

    39 Rosedale Welwyn Garden City AL7 1DW

    Received 15 May 2025
  5. Appeal Decided - AllowedS6/2012/2446/FP

    Erection of single storey front extension

    79 Crawford Road Hatfield AL10 0PF

    Received 21 Nov 2012
  6. Decided - Granted6/2024/1282/FULL

    Erection of a replacement dwelling following the demolition of the existing dwelling, alterations to existing garage and hardstanding

    10 Sunnyfield Hatfield AL9 5DX

    Received 8 Jul 2024
  7. Decided - Granted6/2023/1678/EM

    Formation of hardstanding and installation of handrails with removal of hedge

    139 Hollybush Lane Welwyn Garden City AL7 4JS

    Received 10 Aug 2023
  8. Decided - GrantedC6/1987/0511/FP

    Single storey rear extensioin

    228 Handside Lane, Welwyn Garden City, AL8 6TD

    Received 1 Jan 1987
  9. Decided - Granted6/2016/1298/HOUSE

    Conversion of garage and new porch

    24 Gresley Close, Welwyn Garden City, AL8 7QB

    Received 28 Jun 2016
  10. Decided - Granted6/2019/2188/PN11

    Prior approval for the change of use from office (B1) to residential (C3)

    58B Bridge Road East Welwyn Garden City AL7 1JU

    Received 3 Sept 2019
  11. Decided - Granted6/2022/1853/MAJ

    Construction of a 4,012sqm extension to the existing warehouse space (Use Class E) with associated plant and works including the relocation of a bicycle shelter, re-routed internal access road and landscaping

    Eisai Europe Limited, European Knowledge Centre, Mosquito Way, Hatfield, AL10 9SN

    Received 8 Aug 2022
  12. Decided - Granted6/2020/0760/HOUSE

    Removal of existing windows and doors, installation of new windows and doors. Installation of new roof window

    The Willows 37 New Road Digswell Welwyn AL6 0AQ

    Received 19 Mar 2020
  13. Decided - Granted6/2026/0249/FULL

    Change of use from dwellinghouse (Use Class C3) to a 4 bedroom House in Multiple Occupation (Use Class C4) and installation of a cycle rack

    23 Cedar Road Hatfield AL10 8NZ

    Received 12 Feb 2026
  14. Decided - GrantedS6/2015/0021/TP

    Crown reduce Ash tree within 1 metre of previous cuts covered by TPO 240

    4 Lea Green Mill Green Lane Hatfield AL9 5NX

    Received 9 Jan 2015
  15. Decided - Refused6/2020/3396/EM

    Conversion of conservatory to an extension with alterations to roof, walls, windows and doors

    193 Thistle Grove Welwyn Garden City AL7 4AG

    Received 23 Nov 2020
  16. Decided - Granted6/2025/0692/PN8

    Prior approval for a ground floor rear extension which will measure 6m in depth, 3m to the eaves and the maximum height of 4m

    30 St Albans Road East Hatfield AL10 0EH

    Received 9 Apr 2025
  17. Decided - Granted6/2025/1968/EMT

    Reduce 1 x Laurel Bush by 50% Reduce 1 x Plum Tree by one third Fell 1 x Plum Tree

    4 The Orchard Welwyn Garden City AL8 7PL

    Received 15 Sept 2025
  18. Decided - Granted6/2021/0037/FULL

    Installation of two Portakabin buildings to be used for storage for a temporary period of three years

    Eisai Limited European Knowledge Centre Mosquito Way Hatfield AL10 9SN

    Received 7 Jan 2021
  19. Decided - Granted6/2020/3212/HOUSE

    Insertion of new rear elevation dormer window and a roof light on the front elevation over staircase

    65 Calder Avenue Hatfield AL9 7AJ

    Received 1 Dec 2020
  20. Decided - Refused6/2019/1970/LAWP

    Certificate of lawfulness for the erection of a single storey rear conservatory

    16 Daffodil Close Hatfield AL10 9FF

    Received 8 Aug 2019
  21. Decided - Split6/2022/1265/COND

    Submission of details pursuant to conditions 2 (Materials), 3 (Landscaping) and 4 (Noise) on planning application 6/2021/3410/FULL

    Welwyn Reservoir Ottway Walk Welwyn AL6 9JT

    Received 30 May 2022
  22. Decided - Granted6/2025/1682/HOUSE

    Erection of a rear extension, new garage, following demolition of existing. Front wall to be rebuilt and new step and internal alterations

    56 Bell Lane Brookmans Park AL9 7AY

    Received 5 Aug 2025
  23. Decided - Granted6/2016/0651/EM

    Erection of Two storey side extension

    45 Great Dell, Welwyn Garden City, AL8 7HP

    Received 8 Apr 2016
  24. Decided6/2023/0697/TC

    T1 Crown thin 1 x apple tree, cut back large extended limbs by 1-2m remove deadwood. T2 Crown reduce 1 x holly tree by 30%, crown thin and remove deadwood. T3 & T4 Crown reduce 2 x cherry trees by 30%, thin and deadwood.

    42 Digswell Rise Welwyn Garden City AL8 7PW

    Received 28 Mar 2023

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

View all applications

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

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    Planning application documents: what to read first

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  • 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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  • 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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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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