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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
22,950Searchable applications
313Recorded as pending
86%Approval rate · 18,693 approved or refused records
2,632Refused applications

16,061 approved · 2,632 refused · 1,183 withdrawn. Received dates in our records: 5 Jan 2005 to 2 Oct 2026. Most recent record check: 14 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 Counts reflect the last collected status; some records may be out of date.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 - Refused6/2024/1388/HOUSE

    Proposed loft conversion with alterations to the roof to include side and rear dormers, insertion of rooflights and internal alterations

    11 Selwyn Drive Hatfield Hertfordshire AL10 9NH

    Received 19 Jul 2024
  2. Decided - Granted6/2018/0634/HOUSE

    Conversion of roof to habitable space including installation of 2 x front and 2 x rear roof lights to existing roof

    15 The Swallows Welwyn Garden City AL7 1BX

    Received 6 Mar 2018
  3. Decided6/2026/1151/TC

    Tulip tree - full crown reduction to previous reduction (approximately 2 metres). 10% crown thin and remove dead wood and crossing/rubbing branches.

    14 Dellcott Close Welwyn Garden City AL8 7BD

    Received 2 Jul 2026
  4. Decided - Refused6/2018/2875/FULL

    Installation of rear dormer to facilitate first floor extension & porch enclosure

    1 Mardley Hill Welwyn AL6 0UE

    Received 8 Nov 2018
  5. Decided - Refused6/2019/0994/LAWP

    Certificate of lawfulness for erection of a single storey rear extension

    26 Princes Avenue Welwyn Garden City AL7 4DT

    Received 24 Apr 2019
  6. Decided - Granted6/2020/2794/COND

    Submission of details pursuant to condition 1(plant noise report) on planning permission 6/2020/1566/FULL

    8 Harpsfield Broadway Hatfield AL10 9TF

    Received 26 Oct 2020
  7. Decided - Granted6/2020/1506/EMT

    Coppice hedgerow within boundary of 7 The Jinnings to 6ft

    7 The Jinnings Welwyn Garden City AL7 4QB

    Received 25 Jun 2020
  8. Decided - Refused6/2020/3239/HOUSE

    Demolition of existing single storey garage and erection of new single storey outbuilding.

    48 Brocket Road Welwyn Garden City AL8 7TY

    Received 3 Dec 2020
  9. Decided - Granted6/2021/0101/EM

    Installation of two rear dormers and a new circular window on the side elevation

    3 Colgrove Welwyn Garden City AL8 6HY

    Received 13 Jan 2021
  10. Decided - Granted6/2024/1796/LAWP

    Certificate of lawfulness for garage conversion to habitable room, new porch to provide accessible entrance, new external ramps for access and alterations to facade

    59 Tansycroft Welwyn Garden City AL7 2DU

    Received 18 Sept 2024
  11. Decided - Granted6/2021/2419/EM

    Erection of single storey side extension and insertion of bi-folding doors to existing rear elevation

    196 Knightsfield Welwyn Garden City AL8 7RQ

    Received 17 Aug 2021
  12. Decided - Granted6/2022/0864/HOUSE

    Erection of single storey rear extension

    8 Briars Close Hatfield AL10 8DQ

    Received 11 Apr 2022
  13. Decided - Granted6/2020/3214/EM

    Erection of a single storey side extension and infill side extension. Single storey, part two storey side/rear extension following demolition of existing conservatory, insertion of 3x roof lanterns and 3x roof lights, plus alterations to fenestration.

    5 Pentley Park Welwyn Garden City AL8 7RT

    Received 1 Dec 2020
  14. Decided - Granted6/2018/0290/LAWP

    Certificate of lawfulness for loft conversion by converting a hipped roof to a gable end including installation of a rear dormer and 2 x front roof lights

    4 Green Lanes Hatfield AL10 9JT

    Received 30 Jan 2018
  15. Decided - Granted6/2020/1303/EM

    Erection of single storey rear extension

    26 Marsden Green Welwyn Garden City AL8 6YA

    Received 9 Jun 2020
  16. Decided - Granted6/2021/0277/EM

    Alterations to front and rear fenestration

    84 Ludwick Way Welwyn Garden City AL7 3QE

    Received 29 Jan 2021
  17. Decided - Split6/2024/0043/COND

    Submission of details pursuant to Condition 5 (Structural Design Certificate), Condition 6 (Landscaping scheme), Condition 8 (Contamination (Affinity Water)), Condition 12 (Sound Insulation (including ventilation)) and Condition 13 (Noise from nearby existing and proposed commercial operations) on planning permission 6/2021/3422/MAJ

    Car Park Salisbury Square Hatfield AL9 5AD

    Received 8 Jan 2024
  18. Decided - Granted6/2016/1852/HOUSE

    Alterations to garden building to form an annexe

    29 Lemsford Village Welwyn Garden City AL8 7TN

    Received 9 Sept 2016
  19. Decided - Granted6/2019/0452/COND

    Submission of details pursuant to condition 1 (Materials) on planning permission 6/2018/2947/HOUSE

    4 High Road Essendon Hatfield AL9 6HW

    Received 27 Feb 2019
  20. Appeal Decided - Allowed6/2025/1228/FULL

    Construction of two new semi-detached dwellings with associated parking

    Land adjacent to 42 Lemsford Village Lemsford Welwyn Garden City AL8 7TR

    Received 17 Jun 2025
  21. Decided - Granted6/2019/2507/COND

    Submission of details pursuant to condition 5 (acoustic requirements) on planning permission 6/2019/0726/VAR

    The East Great North Road Welwyn Garden City AL8 7TB

    Received 8 Oct 2019
  22. Decided - Granted6/2023/0631/EMT

    Removal of 1 x Wlllow

    6 Barleycroft Green Welwyn Garden City AL8 6JY

    Received 21 Mar 2023
  23. Decided - Granted6/2018/1533/HOUSE

    Erection of single storey front two storey side and single storey rear extension

    5 Elmoor Avenue Welwyn AL6 9PG

    Received 8 Jun 2018
  24. Appeal Decided - Dismissed6/2019/0142/LAWE

    Certificate of lawfulness for replacement of windows

    12 Danesbury Park North Ride Welwyn AL6 9SA

    Received 24 Jan 2019

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 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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