HMWT Gobions Wood Nature Reserve Off Mymms Drive Potters Bar AL9 7AF Data via plota.co.uk

6/2026/1616/TPO - WORKS TO TREES WITH TREE PRESERVATION ORDER Approved
Trees & landscaping

Proposal

Mature Ash tag 895 with multiple cavities and evidence of long term Inonotus hispidus decay with multiple fruiting bodies on stem and around the tree on the ground Heavily declining Hawthorn tag 487, adjacent to and leaning over carpark, fell to fence height, all arisings removed Mature multi-stemmed Ash tag 35 tree has multiple inclusions with decay and leans over carpark, fell to fence height, all arisings removed Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
17 Sept 2026
✓
Approved
22 Oct 2026

Approved on 22 Oct 2026 · Delegated · Last checked 24 Oct 2026

Documents 5

Decision & officer reports 2

PDF Decision Notice_620261616TPO.pdf (671 kb) Document · 22 Oct 2026 View ↗ PDF Delegated Report_620261616TPO(2).pdf (162 kb) Document · 22 Oct 2026 View ↗

Other documents 3

PDF ApplicationFormRedacted.pdf (228 kb) Document · 17 Sept 2026 View ↗ PDF Gobions Tree Safety Work 2026.pdf (1651 kb) Document · 17 Sept 2026 View ↗ PDF Gobions Tree Safety Work 2026.xlsx (9 kb) Document · 17 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 4

Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
Registered park or garden: Gobions (Gubbins)
Nationally designated heritage. Its significance and setting carry great weight.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Agricultural land, grade 3b
Not best and most versatile land (grades 1, 2 and 3a). Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. Natural England's Provisional ALC map (1:250,000, 1970s) agrees.
Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.
Also on the record
Radon affected area, class 2.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area207 m² (2,228 sq ft)
Energy ratingD (66 out of 100), could reach C
PropertyDetached house, 7 habitable rooms
Built1950 to 1966
HeatingBoiler and radiators, mains gas
WallsCavity wall, filled cavity

From the energy performance certificate lodged in July 2022, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

14 Sept 2026Pending

73 Mymms Drive Brookmans Park AL9 7AA

Erection of dwelling following demolition of existing dwelling

6/2026/1550/FULL

Nearby new applications

22 Sept 2026Pending

20 Moffats Lane Brookmans Park AL9 7RU

Erection of garden room to rear elevation

6/2026/1675/HOUSE
14 Sept 2026Pending

73 Mymms Drive Brookmans Park AL9 7AA

Erection of dwelling following demolition of existing dwelling

6/2026/1550/FULL
9 Sept 2026Approved

83 Brookmans Avenue Brookmans Park AL9 7QG

Submission of details pursuant to condition number 1 (Demolition and Constructio...

6/2026/1572/COND
24 Aug 2026Approved

27 The Grove Brookmans Park AL9 7RL

Submission of details pursuant to Condition 1 (details of external render) and C...

6/2026/1478/COND
21 Aug 2026Approved

38 The Grove Brookmans Park AL9 7RN

Submission of details pursuant to Condition 2 (boundary treatments) on planning ...

6/2026/1473/COND
21 Aug 2026Approved

4 Brookmans Avenue Brookmans Park AL9 7QJ

Retention of single storey timber structure as gym and addition of storm porch

6/2026/1477/HOUSE

Important details

Council
Welwyn Hatfield
Application type
WORKS TO TREES WITH TREE PRESERVATION ORDER
Postcode
AL9 7AF
Received
17 Sept 2026
Validated
17 Sept 2026
Parish
North Mymms
Case officer
Show
Decision
Granted
Decision date
22 Oct 2026
Decision level
Delegated
Applicant
Show
Agent
Herts & Middlesex Wildlife Trust

How this decision compares

Decided in 35 days from validation, 13 days faster than Welwyn Hatfield's median of 48 for tree and landscaping works. Approved, as 98% of tree and landscaping works here are.

71%decided within 8 weeks
98%approved
559decided in the last year

Plota live figures for tree and landscaping works decided by Welwyn Hatfield in the last twelve months, from validation. Welwyn Hatfield decision record →

Consultation & key dates

Comments by
2 Oct 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of a front boundary wall with pillars, railings and gates with light columns att…
6/2025/1747/HOUSE
2025 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of a front boundary wall with pillars, railings and gates with light columns att…
6/2025/1747/HOUSE
2025 Approved
26 Mymms Drive Brookmans Park AL9 7AF
T1 Oak tree that is located in the rear of the property between 24 and 26 Crown reduce he…
6/2025/1352/TPO
2025 Approved
26 Mymms Drive Brookmans Park AL9 7AF
T1 Oak tree that is located in the rear of the property between 24 and 26 Crown reduce he…
6/2025/1352/TPO
2024 Approved
23 Mymms Drive Brookmans Park AL9 7AE
Erection of front boundary wall with railings and gates
6/2024/2243/HOUSE
2024 Approved
15 Mymms Drive Brookmans Park AL9 7AE
Conversion of the garage into a habitable room, erection of part single, part double stor…
6/2024/1673/HOUSE
2024 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of a single storey rear extension with first floor rear balcony to include priva…
6/2024/1128/HOUSE
2024 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of a single storey rear extension following the demolition of existing rear exte…
6/2024/1123/HOUSE
2023 Approved
25 Mymms Drive Brookmans Park AL9 7AE
Erection of a new dwelling following demolition of existing dwelling
6/2023/0895/FULL
2023 Approved
25 Mymms Drive Brookmans Park AL9 7AE
Erection of a new dwelling following demolition of existing dwelling
6/2023/0895/FULL
2023 Approved
24 Mymms Drive Brookmans Park Hatfield AL9 7AF
Erection of dwelling and installation of front boundary treatment following demolition of…
6/2023/1412/FULL
2023 Approved
24 Mymms Drive Brookmans Park Hatfield AL9 7AF
Erection of dwelling and installation of front boundary treatment following demolition of…
6/2023/1412/FULL
2022 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of single storey rear extension following the demolition of existing extension
6/2022/2414/HOUSE
2022 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Erection of single storey rear extension following the demolition of existing extension
6/2022/2414/HOUSE
2020 Approved
28 Mymms Drive Hatfield AL9 7AF
T1 Oak crown reduction from 9.6m to 8m and height reduction 17m to 15m. T2 Oak crown redu…
6/2020/2656/TPO
2020 Approved
28 Mymms Drive Hatfield AL9 7AF
T1 Oak crown reduction from 9.6m to 8m and height reduction 17m to 15m. T2 Oak crown redu…
6/2020/2656/TPO
2020 Approved
23 Mymms Drive Brookmans Park Hatfield AL9 7AE
Erection of a rear conservatory
6/2020/0407/HOUSE
2020 Approved
23 Mymms Drive Brookmans Park Hatfield AL9 7AE
Erection of a rear conservatory
6/2020/0407/HOUSE
2016 Approved
40 Mymms Drive, Brookmans Park, Hatfield, AL9 7AF
Erection of part single/part two storey side and rear extension, part single/part two sto…
6/2016/2288/HOUSE
2016 Approved
40 Mymms Drive, Brookmans Park, Hatfield, AL9 7AF
Erection of part single/part two storey side and rear extension, part single/part two sto…
6/2016/2288/HOUSE
2024 Approved
22 Mymms Drive Brookmans Park AL9 7AF
Certificate of lawfulness for a proposed detached outbuilding in rear garden
6/2024/2265/LAWP
2023 Approved
24 Mymms Drive Brookmans Park AL9 7AF
Submission of details pursuant to condition number 1 (details of crown roof), 2 (material…
6/2023/2409/COND
2023 Approved
24 Mymms Drive Brookmans Park AL9 7AF
Submission of details pursuant to condition number 1 (details of crown roof), 2 (material…
6/2023/2409/COND
2022 Refused
22 Mymms Drive Hatfield AL9 7AF
Prior approval for the erection of a single storey rear extension measuring 8m in depth…
6/2022/2412/PN8
2022 Refused
22 Mymms Drive Hatfield AL9 7AF
Prior approval for the erection of a single storey rear extension measuring 8m in depth…
6/2022/2412/PN8
Welwyn Hatfield
Planning Authority Score
2.1/10
Poor
#272 of 296 councils
Relevant to this application:
Householder decisions

Welwyn Hatfield is slower than most councils at deciding householder applications, ranking #224 out of 296. 50% of applications have the time limit extended, above the 41% national average. Householder applications are slightly less likely to be approved here (86%) than the national average (90%).

Slower than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Welwyn Hatfield decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #200 of 296
86%
Householder approved
Below avg (90%) #246 of 296
53%
Decided in 8 weeks
Below avg (63%) #224 of 296
50%
Extended time limit
Above avg (41%) #229 of 296
84%
Minor dwellings approved
63 decided (1-9 homes)
83%
Major dwellings approved
12 decided (10+ homes)
73%
Change of use approved
22 decided
633
Total decisions
87 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.