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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
21,305Searchable applications
298Recorded as pending
86%Approval rate · 17,216 approved or refused records
2,435Refused applications

14,781 approved · 2,435 refused · 1,088 withdrawn. Received dates in our records: 5 Jan 2005 to 30 Sept 2026. Most recent record check: 13 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 Counts reflect the last collected status; some records may be out of date.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. Decided6/2017/2980/TPO

    Reduce 1x Red Oak by 30% and Reduce 1x Silver Birch by 30% . Conservation Area

    23 Elmwood Welwyn Garden City AL8 6LD

    Received 29 Dec 2017
  2. Decided6/2023/2344/TC

    Crown reduce 1 x hawthorn tree back to previous growth points Remove any major deadwood

    241 Heronswood Road Welwyn Garden City AL7 3JH

    Received 21 Nov 2023
  3. Decided - Granted6/2017/1903/FULL

    Erection of 4 front, 4 rear and 2 side dormer windows, 5 front and 5 rear rooflights to facilitate conversion of roof, to include the creation of 2 x 1-bedroom and 2 x 2-bedroom flats with associated parking, cycle store and landscaping

    36 Salisbury Square Hatfield AL9 5AF

    Received 24 Aug 2017
  4. Decided - Granted6/2022/0806/EM

    Erection of single storey side infill extension, single storey rear extension, first floor side and rear extension and conversion of roofspace to habitable use to include 3 x flank rooflights and alterations to fenestration with replacement chimney

    46 Blakemere Road Welwyn Garden City AL8 7PJ

    Received 1 Apr 2022
  5. Decided - Granted6/2025/0255/LB

    Repair existing chimney stack

    The Thatched House 3 Pennyfathers Lane Welwyn AL6 0EN

    Received 10 Feb 2025
  6. Decided - Granted6/2022/1738/EMT

    Removal of cherry tree

    10 Stanborough Green, Welwyn Garden City, AL8 6XG

    Received 25 Jul 2022
  7. Decided - Granted6/2022/2213/HOUSE

    Erection of rear pergola structure

    6 Groom Place Welwyn Garden City Hertfordshire AL7 1GG

    Received 26 Sept 2022
  8. Decided6/2022/0694/TC

    G1 Lawson cypress x 2 to fell.

    First Floor 8-12 Salisbury Square Hatfield AL9 5AD

    Received 23 Mar 2022
  9. Decided - Granted6/2023/0335/LAWP

    Certificate of lawfulness for the erection of a single storey side extension

    30 Westland Drive Hatfield AL9 7UQ

    Received 13 Feb 2023
  10. Decided6/2020/1409/TC

    Fell 1 x Oak tree (T1)

    6 Densley Close Welwyn Garden City AL8 7JX

    Received 17 Jun 2020
  11. Decided - Withdrawn6/2017/2288/FULL

    Change of use from Office (B1 (a)) to a Dwellinghouse (C3) to include the creation of 4 dwellings.

    First Floor 12 Harpsfield Broadway Hatfield AL10 9TF

    Received 5 Oct 2017
  12. Decided - Refused6/2017/1616/FULL

    Erection of detached dwelling and double garage following demolition of existing detached garage and workshop building

    31 Mill Lane Welwyn AL6 9EU

    Received 25 Jul 2017
  13. Decided - Granted6/2017/1683/VAR

    Variation of condition 1 (approved plans) on planning permission 6/2015/1661/FULL dated 05.11.2015

    174 Great North Road Hatfield AL9 5JN

    Received 1 Aug 2017
  14. Decided - Granted6/2021/2262/LAWP

    Certificate of lawfulness for conversion of roofspace to habitable use to include a rear dormer, juliet balcony and 1 x front rooflight

    2 Endymion Court Hatfield AL10 8AU

    Received 28 Jul 2021
  15. Decided - Granted6/2023/1139/FULL

    Change of use of land to residential curtilage, following the removal and replacement of brick boundary wall with new brick wall, hedging and grass

    1 Brooksfield Welwyn Garden City AL7 2BJ

    Received 30 May 2023
  16. Decided - Granted6/2026/0889/ADV

    Removal of existing non-illuminated signage and erection of an electronic advertising display

    The Galleria Land Securities Comet Way Hatfield AL10 0XR

    Received 19 May 2026
  17. Decided - Refused6/2020/2860/HOUSE

    Erection of a boundary wall & gates fronting the highway plus a raised patio to the rear garden

    150 Tolmers Road Cuffley Potters Bar EN6 4JR

    Received 2 Nov 2020
  18. Decided - Granted6/2025/1788/HOUSE

    Erection of single rear extension, garage conversion & increase window size at first floor front elevation

    9 Hill Rise Cuffley Potters Bar EN6 4ED

    Received 22 Aug 2025
  19. Decided - Granted6/2020/2456/TPO

    Reduce 1 x Oak [T1] by 4 mtrs covered by TPO108 (G15)

    8 Mardley Wood Welwyn AL6 0UX

    Received 25 Sept 2020
  20. Decided - Refused6/2024/0305/EM

    Erection of a two storey side extension

    38 Mount Way Welwyn Garden City AL7 4LB

    Received 14 Feb 2024
  21. Decided - Granted6/2024/0120/HOUSE

    Proposed loft conversion including two side dormers, a roof light window and insertion of a first floor window to the front and rear elevations

    21 Theobalds Road Cuffley Potters Bar EN6 4HQ

    Received 22 Jan 2024
  22. Decided - Granted6/2019/1338/FULL

    Change of use from entertainment and leisure (Use Class D2) to teaching facility (Use Class D1)

    University of Hertfordshire, Club de Havilland, Mosquito Way, Hatfield, AL10 9EU

    Received 4 Jun 2019
  23. Appeal Decided - Dismissed6/2024/0614/FULL

    Erection of a new dwelling

    2 Copse Hill Welwyn AL6 0SG

    Received 28 Mar 2024
  24. Decided - Granted6/2024/2315/TPO

    T1 - Oak tree - reduced back by 2m back to previoius pollard points with epicormic growth being removed from main trunk (TPO 695 (2017) T1)

    40 Tolmers Road Cuffley Potters Bar EN6 4JF

    Received 2 Dec 2024

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

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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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