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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
27,820Searchable applications
307Recorded as pending
87%Approval rate · 22,960 approved or refused records
3,091Refused applications

19,869 approved · 3,091 refused · 1,493 withdrawn. Received dates in our records: 5 Jan 2005 to 13 Oct 2026. Most recent record check: 17 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 Counts reflect the last collected status; some records may be out of date.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 - Granted6/2020/1304/HOUSE

    Erection of single storey rear extension

    26 Marsden Green Welwyn Garden City AL8 6YA

    Received 9 Jun 2020
  2. Decided - Granted6/2016/1039/MAJ

    Formation of new access

    Plot 6000, Hatfield Avenue, Hatfield Business Park, Hatfield, AL10 9UA

    Received 25 May 2016
  3. Appeal Decided - Allowed6/2020/2056/HOUSE

    Single storey front extension to replace existing porch canopy & external cupboard.

    47 Howicks Green Welwyn Garden City AL7 4RJ

    Received 13 Aug 2020
  4. Decided - Granted6/2020/0114/HOUSE

    Erection part ground floor and first floor rear extension

    17 Lemsford Village Welwyn Garden City AL8 7TN

    Received 17 Jan 2020
  5. Decided6/2025/1555/EIA

    Request for a screening opinion seeking confirmation that an EIA will not be required as part of the amendments proposed to Planning Permission Ref. 6/2020/3420/MAJ

    BioPark Broadwater Road Welwyn Garden City AL7 3AX

    Received 18 Jul 2025
  6. Decided - Granted6/2019/1120/HOUSE

    Erection of a single storey rear extension

    3 Warren Way Digswell Welwyn AL6 0DQ

    Received 9 May 2019
  7. Decided - Granted6/2021/2096/EMT

    Reduce 1 x Ash to 4m

    74 Valley Road Welwyn Garden City AL8 7DP

    Received 9 Jul 2021
  8. Decided - Granted6/2018/2716/LB

    Extension and alterations to convert the building into a single dwelling with associated landscaping, hard surfacing and alterations to a section of the existing wall to create a new gated opening for pedestrian access

    The Wood Barn The Estate Yard North Mymms Park North Mymms Hatfield AL9 7TR

    Received 23 Oct 2018
  9. Decided - Granted6/2019/0482/HOUSE

    Erection of single storey rear extension following demolition of existing rear extension

    31 Hillside Way Welwyn AL6 0TY

    Received 4 Mar 2019
  10. Decided6/2024/0635/TC

    T1 Oak - 2-3m Crown Reduction T2 Hawthorn - 2m Crown Reduction T3 Holly - 1-2m Crown Reduction T4 Prunus - 1-2m Crown Reduction T5 Hornbeam - 2m Crown Reduction and removal of adjacent self set stem that is growing into the main crown We would like to continue the pruning cycle for these trees to allow more light into the surrounding gardens and help with general maintenance. Cuts will be made back to previous pruning points

    1 The Old Drive Welwyn Garden City AL8 6TB

    Received 4 Apr 2024
  11. Decided - Granted6/2019/1539/LAWP

    Certificate of lawfulness for the erection of single storey rear extension

    37 Holloways Lane Welham Green Hatfield AL9 7NR

    Received 24 Jun 2019
  12. Decided - Granted6/2023/1206/TPO

    1 x Lime to fell to ground level - tree is dead

    St Francis Of Assisi Church Church Road Welwyn Garden City Hertfordshire AL8 6QJ

    Received 6 Jun 2023
  13. Decided - Granted6/2024/0540/FULL

    Erection of single storey extension to Danesbury Neurological Centre providing 6 bedrooms in place of an existing open ward

    Danesbury House Neurological Centre School Lane Welwyn AL6 9SB

    Received 19 Mar 2024
  14. Decided - GrantedW6/2014/1777/TE

    Fell 2 Leylandi trees

    26 Kilworth Close, Welwyn Garden City, AL7 3HR

    Received 11 Aug 2014
  15. Decided - Granted6/2017/1725/HOUSE

    Erection of a single storey rear extension

    5 East Mead Welwyn Garden City AL7 4RR

    Received 4 Aug 2017
  16. Decided - Granted6/2023/1611/HOUSE

    Erection of a two storey rear extension

    56 Digswell Rise Welwyn Garden City AL8 7PW

    Received 3 Aug 2023
  17. Decided - Granted6/2019/3239/PN8

    Prior approval for the erection of a single storey rear extension measuring 4.50m in depth, 3.30m in heights and 2.90m to the eaves

    12 Hill Ley Hatfield AL10 8LX

    Received 24 Dec 2019
  18. Decided - Granted6/2017/0607/TPO

    H1- Conifer, to reduce top by 2meters and sides by 1meter, H2- Mixed, to trim back to boundary, by 1meter, T1- Sycamore, to crown lift to 5meters, T2- Holly, to dismantle to ground level, T3- Thorn, to pollard and T4-T5 Acacia, to dismantle to ground level - Conservation Area

    41 Digswell Rise Welwyn Garden City AL8 7PP

    Received 24 Mar 2017
  19. Decided - Granted6/2015/2273/FULL

    Erection of a single storey warehouse extension following demolition of an existing internal office structure

    Unit 57-63, Brownfields, Welwyn Garden City, AL7 1AN

    Received 6 Nov 2015
  20. Decided - Refused6/2024/2403/HOUSE

    Demolition of existing double garage. Erection of double storey side extension and double storey front porch extension. Raising of existing front roof slope and alterations to fenestration and window surrounds

    4 Hangmans Lane Welwyn AL6 0TJ

    Received 19 Dec 2024
  21. Decided - Granted6/2025/1973/HOUSE

    Erection of a single storey rear extension, part garage conversion and extending the existing rear patio.

    1 Templewood Welwyn Garden City AL8 7HT

    Received 15 Sept 2025
  22. Decided - GrantedN6/2013/2581/FP

    Erection of first floor rear extension

    5 Holly Road Woolmer Green Knebworth SG3 6LL

    Received 10 Dec 2013
  23. Decided - Granted6/2017/1191/HOUSE

    Erection of single storey rear extension

    4 Sovereign Place Hatfield AL9 5EL

    Received 30 May 2017
  24. Decided - Granted6/2026/0112/HOUSE

    Erection of part two storey and part single storey front and side extensions. Erection of first floor rear extension. Alterations to the roof, including front and rear dormers and rooflights

    54 Tolmers Road Cuffley Potters Bar EN6 4JF

    Received 26 Jan 2026

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

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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