23 Pentley Park Welwyn Garden City AL8 7RT Data via plota.co.uk

6/2026/1097/HOUSE - HOUSEHOLDER APPLICATION Approved
Extensions & alterations

Proposal

Erection of single storey side/rear extension, conversion of existing garage to a habitable room including raising existing roof and alterations to fenestration Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
25 Jun 2026
✓
Approved
20 Aug 2026

Approved on 20 Aug 2026 · Delegated · Last checked 8 Sept 2026

Documents 12

Decision & officer reports 2

PDF Decision Notice_620261097HOUSE.pdf (729 kb) Document · 20 Aug 2026 View ↗ PDF Delegated Report_620261097HOUSE(2).pdf (140 kb) Document · 20 Aug 2026 View ↗

Statements & assessments 1

PDF Design and Access Statement.pdf (278 kb) Document · 25 Jun 2026 View ↗

Consultation & comments 2

PDF Comments(1).pdf (77 kb) Document · 17 Aug 2026 View ↗ PDF Comments.pdf (77 kb) Document · 24 Jul 2026 View ↗

Other documents 7

PDF 6.2026.1097.HOUSE at 23 Pentley Park, Welwyn Garden City.pdf (248 kb) Document · 17 Aug 2026 View ↗ PDF Site Notice_620261097HOUSE.pdf (79 kb) Document · 29 Jul 2026 View ↗ PDF 6_2026_1097_HOUSE 23 Pentley Park Welwyn Garden City AL8 7RT_Redacted.pdf (235 kb) Document · 23 Jul 2026 View ↗ PDF ApplicationFormRedacted.pdf (275 kb) Document · 25 Jun 2026 View ↗ PDF 309 26 100.pdf (320 kb) Document · 25 Jun 2026 View ↗ PDF 309 26 101.pdf (282 kb) Document · 25 Jun 2026 View ↗ PDF 309 26 102.pdf (338 kb) Document · 25 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 6

Welwyn Garden City conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
Local nature reserve 224 m away: Sherrardspark Wood
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
SSSI 224 m away: Sherrardspark Wood SSSI; 1 listed building within 150 m; Inside the Welwyn Garden City built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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.

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Other new applications on this street

10 Aug 2026Pending

10 Pentley Park Welwyn Garden City AL8 7RU

T1- Bay tree to fell to ground level as it has outgrown its position and is inte...

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24 Pentley Park Welwyn Garden City AL8 7SB

Fell 1 x Liquidambar styraciflua (sweet gum).

6/2026/1344/TC
23 Jul 2026Pending

Templewood Primary School Pentley Park Welwyn Garden City AL8 7SD

T28 Deadwood - Crown Clean Oak; T30 Crown Reduce back to previous- Remove Deadwo...

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8 Jul 2026Pending

85 Pentley Park Welwyn Garden City AL8 7SL

Ground works and associated root pruning/ severance of T1 oak to facilitate inst...

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Nearby new applications

24 Aug 2026Pending

5 Ashley Close Welwyn Garden City AL8 7LH

Proposed addition of a 3104 x 5474 mm pent roofed wooden shed to rear garden

6/2026/1487/EM
27 Aug 2026Pending

10 Scholars Mews Welwyn Garden City AL8 7JQ

1 x Crab Apple to reduce by approx 1.2m height and width

6/2026/1507/TC
25 Aug 2026Pending

49 Knightsfield Welwyn Garden City AL8 7JE

1 x Irish Yew to remove in sections to ground level. Remove as tree is close to ...

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25 Aug 2026Pending

49 Knightsfield Welwyn Garden City AL8 7JE

1 x Irish Yew to remove in sections to ground level. Remove as tree is close to ...

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13 Aug 2026Pending

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Change of use of amenity land to driveway area with part hedge removal, part two...

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10 Aug 2026Pending

10 Pentley Park Welwyn Garden City AL8 7RU

T1- Bay tree to fell to ground level as it has outgrown its position and is inte...

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Important details

Council
Welwyn Hatfield
Application type
HOUSEHOLDER APPLICATION
Postcode
AL8 7RT
Received
25 Jun 2026
Validated
25 Jun 2026
Case officer
Show
Decision
Granted
Decision date
20 Aug 2026
Decision level
Delegated
Applicant
Show
Agent
Show

How this decision compares

Decided in 56 days from validation, about the council's usual 56 days. Approved, as 87% of extensions here are.

68%decided within 8 weeks
87%approved
636decided in the last year

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

Public comments

2comments received

5 neighbours consulted · Last counted 8 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Comments by
19 Aug 2026

Historical activity at this location

39 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025 Approved
Installation on the south facing pitch of the roof of a solar array of approx 4.4x6.8m, p…
6/2025/0616/EM
2025 Approved
Installation on the south facing pitch of the roof of a solar array of approx 4.4x6.8m, p…
6/2025/0616/EM
2024 Approved
Addition of two North facing rooflights, the conversion of the attic and associated minor…
6/2024/2177/EM
2024 Approved
Installation of two rooflights to the side roof slope, two windows to the front and rear…
6/2024/1313/HOUSE
2024 Approved
Erection of two north facing dormer windows, the conversion of the attic and associated m…
6/2024/1365/EM
2020 Approved
Formation of hardstanding
6/2020/0006/EM
2020 Approved
Formation of hardstanding
6/2020/0006/EM
2020 Approved
Reduce 1x Oak tree by 30% Fell 5x Lawson Cypress trees
6/2020/0210/EM
2020 Approved
Reduce 1x Oak tree by 30% Fell 5x Lawson Cypress trees
6/2020/0210/EM
2020 Approved
Reduce 1x Oak tree by 30% Fell 5x Lawson Cypress trees
6/2020/0209/TC
2020 Approved
Reduce 1x Oak tree by 30% Fell 5x Lawson Cypress trees
6/2020/0209/TC
2019 Approved
Submission of details pursuant to condition 1(Material Samples) on planning permission 6/…
6/2019/2549/COND
2019 Approved
Erection of a single storey side extension and alterations to fenestration
6/2019/1976/EM
2019 Approved
Erection of a single storey side extension and alterations to fenestration
6/2019/1989/HOUSE
Within ~100m

Nearby activity

2025 Approved
8 Sherrardspark Road Welwyn Garden City AL8 7JP
T1. Copper beech to remove the lowest limb growing over the garden back to the trunk. Cut…
6/2025/1914/TC
2025 Approved
8 Sherrardspark Road Welwyn Garden City AL8 7JP
T1. Copper beech to remove the lowest limb growing over the garden back to the trunk. Cut…
6/2025/1914/TC
2025 Approved
31 Digswell Road Welwyn Garden City AL8 7PB
T1 Silver birch to fell.
6/2025/1564/TC
2025 Approved
31 Digswell Road Welwyn Garden City AL8 7PB
T1 Silver birch to fell.
6/2025/1564/TC
2025 Approved
13 Pentley Park Welwyn Garden City AL8 7RT
Replacement of two first floor sub standard double glazed windows at the rear of the hous…
6/2025/0180/EM
2025 Approved
13 Pentley Park Welwyn Garden City AL8 7RT
Replacement of two first floor sub standard double glazed windows at the rear of the hous…
6/2025/0180/EM
2024 Approved
31 Digswell Road Welwyn Garden City AL8 7PB
Replacement conservatory roof
6/2024/2301/EM
2024 Approved
31 Digswell Road Welwyn Garden City AL8 7PB
Replacement conservatory roof
6/2024/2219/HOUSE
2024 Approved
8 Sherrardspark Road Welwyn Garden City AL8 7JP
T1. Thuja - Remove the 2 lowest limbs. T3. Sycamore - Fell the two stems with large cavit…
6/2024/1953/EMT
2022 Withdrawn
5 Pentley Park Welwyn Garden City AL8 7RT
Erection of a new single storey rear extension and part infill side extension Together wi…
6/2022/0393/EMH
2022 Withdrawn
5 Pentley Park Welwyn Garden City AL8 7RT
Erection of a new single storey rear extension and part infill side extension Together wi…
6/2022/0393/EMH
2024 Approved
8 Sherrardspark Road Welwyn Garden City AL8 7JP
T1. Thuja - Remove the 2 lowest limbs. T3. Sycamore - Fell the two stems with large cavit…
6/2024/1927/TC
2024 Approved
12 Pentley Park Welwyn Garden City AL8 7RU
1 x Hawthorn to fell.
6/2024/1924/TC
2024 Approved
12 Pentley Park Welwyn Garden City AL8 7RU
1 x Hawthorn to fell.
6/2024/1925/EMT
2024 Approved
22 Mandeville Rise Welwyn Garden City AL8 7JU
3 x Holly trees on the right-hand side of the garden to reduce back to previous cuts 1 x…
6/2024/1592/EMT
2024 Approved
16 Pentley Park Welwyn Garden City AL8 7RU
65ft Copper Beech to reduce by 30% 20ft Apple tree to reduce by 30%
6/2024/1305/EMT
2024 Approved
22 Mandeville Rise Welwyn Garden City AL8 7JU
3 x Holly trees on the right-hand side of the garden to reduce back to previous cuts 1 x…
6/2024/1577/TC
2024 Approved
16 Pentley Park Welwyn Garden City AL8 7RU
65ft Copper Beech to reduce by 30% 20ft Apple tree to reduce by 30%
6/2024/1301/TC
2024 Approved
3 Pentley Park Welwyn Garden City AL8 7RT
Reduce 1 x Pear tree by 2m Reduce 1 x Apple tree by 2m back to previous cuts Reduce 1 x M…
6/2024/0407/EMT
2024 Approved
29 Digswell Road, Welwyn Garden City, AL8 7PB
Replacement hedge in front and part replacement of hedge in rear garden with fence
6/2024/0436/EM
2019 Withdrawn
20 Mandeville Rise Welwyn Garden City AL8 7JU
Erection of a part-single, part-double-storey extension to rear and side.
6/2019/0905/HOUSE
2019 Withdrawn
20 Mandeville Rise Welwyn Garden City AL8 7JU
Erection of a part-single, part-double-storey extension to rear and side.
6/2019/0902/EM
2019
8 Mandeville Rise Welwyn Garden City AL8 7JU
Reduce 4 x Oak trees Reduce 3 x Hornbeam tees Fell 1 x Hornbeam tree
6/2019/1108/
2018 Withdrawn
17 Pentley Park Welwyn Garden City AL8 7RT
Installation of front window and side roof lights, replacement of rear window with french…
6/2018/2003/HOUSE
2019 Approved
31 Digswell Road Welwyn Garden City AL8 7PB
Reduce Crown 1x T2 Silver Birch 1.5m and crown clean Reduce Crown 1x T3 Plum by up to 2 m…
6/2019/0083/TPO
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