20 Mardley Hill Welwyn AL6 0TS
Pending
6/2026/0097/TPO
Description
T1 x Sweet chestnut to reduce by around 3m in height and 1.5-2m width
Nearby new applications
69 Robbery Bottom Lane Welwyn AL6 0UL
Raising the existing roof line incorporating new rooflights, new dormer, externa...
4 Marlborough Close Welwyn AL6 0UG
Erection of single storey rear infill extension
3 Heathlands Welwyn AL6 0UU
Erection of rear and side single-storey extension with conversion of garage to h...
Historical activity at this location
29 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
2024
Approved
2 x Oaks to reduce back to previous pruning points. Under TPO 24 A3 or TPO640 (2017) G3
2021
Approved
Reduce 2 x Oak by 1.5m, remove epicormic growth to height of 5m above ground level. RH Oa…
2021
Approved
Reduce 2 x Oak by 1.5m, remove epicormic growth to height of 5m above ground level. RH Oa…
2017
Approved
Reduce and shape two Oak tree crowns by upto 30%, removing lateral growth by approximatel…
Within ~100m
Nearby activity
2025
Approved
4 The Drive Welwyn AL6 0TR
TPO 640 & TPO 24 T1 - Scots Pine, to remove three low hanging secondary branches growing…
2025
Approved
4 The Drive Welwyn AL6 0TR
TPO 640 & TPO 24 T1 - Scots Pine, to remove three low hanging secondary branches growing…
2025
Approved
2A The Drive Welwyn AL6 0TR
TPO 24 T1 - Sweet Chestnut - Reduce Sweet Chestnut by 2.5m this tree due to large cavity…
2025
Approved
2A The Drive Welwyn AL6 0TR
TPO 24 T1 - Sweet Chestnut - Reduce Sweet Chestnut by 2.5m this tree due to large cavity…
2025
Approved
5 Heath Road Welwyn AL6 0TP
T1 - 1 x Elderberry to reduce to below gutter height (3m approx) - Tree large and dominat…
2025
Approved
5 Heath Road Welwyn AL6 0TP
T1 - 1 x Elderberry to reduce to below gutter height (3m approx) - Tree large and dominat…
2025
Approved
3 Heath Road Welwyn AL6 0TP
T1 - 1 x Cherry to reduce by approximately 2m in height and width - Reduce to retain suit…
2025
Approved
3 Heath Road Welwyn AL6 0TP
T1 - 1 x Cherry to reduce by approximately 2m in height and width - Reduce to retain suit…
2024
Approved
2A The Drive Welwyn AL6 0TR
T1- Scot’s Pine. Reduction to lower growth point beyond tear. Removal of large diameter d…
2024
Approved
1A Heath Road Welwyn AL6 0TP
Erection of additional storey, single storey side extension and front and rear porch cano…
2024
Approved
22 Mardley Hill Welwyn AL6 0TS
Tree T1 - Sweet Chesnut in the site plans - trim of canopy to original growth points and…
2023
Approved
30 Mardley Hill Welwyn AL6 0TS
T1 - Laurel reduce by 30% due to excessive shading. T2 - Hornbeam reduce by 20% side redu…
2023
Approved
30 Mardley Hill Welwyn AL6 0TS
T1 - Laurel reduce by 30% due to excessive shading. T2 - Hornbeam reduce by 20% side redu…
2023
Approved
2 The Drive Welwyn AL6 0TR
T1 reduce oak by 1.5 metres due to size and risk of damage. T4 reduce oak by 1.5 metres d…
2023
Approved
2 The Drive Welwyn AL6 0TR
T1 reduce oak by 1.5 metres due to size and risk of damage. T4 reduce oak by 1.5 metres d…
2022
Approved
4 The Drive Welwyn AL6 0TR
T1 - Oak Tree - Reduce by 30% (3 meters) due to excessive shading T2 - Oak Tree - Reduce…
2022
Approved
4 The Drive Welwyn AL6 0TR
T1 - Oak Tree - Reduce by 30% (3 meters) due to excessive shading T2 - Oak Tree - Reduce…
2022
Approved
6 The Drive Welwyn AL6 0TR
Installation of heat pump
2022
Approved
6 The Drive Welwyn AL6 0TR
Installation of heat pump
2021
Approved
2A The Drive Welwyn AL6 0TR
T1 - Oak - Fell to ground level due to basal decay and proximity to properties T2 - Oak…
2016
Refused
1B Heath Road Welwyn AL6 0TP
Erection of two storey side extension
2016
Approved
2 The Drive Welwyn AL6 0TR
Erection of two storey rear extension, first floor side extension over double garage and…
2016
Approved
2 The Drive Welwyn AL6 0TR
Erection of two storey rear extension, first floor side extension over double garage and…
2016
Refused
1B Heath Road Welwyn AL6 0TP
Erection of two storey side extension
2016
Refused
1B Heath Road Welwyn AL6 0TP
Erection of two storey side extension
Welwyn Hatfield
Planning Authority Score
2.2/10
Poor
#262 of 292 councils
Relevant to this application:
Householder decisions
Welwyn Hatfield is slower than most councils at deciding householder applications, ranking #221 out of 292. 50% of applications have the time limit extended, above the 40% national average. Householder applications are slightly less likely to be approved here (87%) 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 performance
Based on MHCLG data, 2025
88%
Overall approval rate
Above avg (87%) #159 of 292
87%
Householder approved
Below avg (90%) #230 of 292
54%
Decided in 8 weeks
Below avg (64%) #221 of 292
50%
Extended time limit
Above avg (40%) #229 of 292
85%
Minor dwellings approved
62 decided (1-9 homes)
93%
Major dwellings approved
14 decided (10+ homes)
83%
Change of use approved
23 decided
630
Total decisions
78 refused in 2025