3 Heathlands Welwyn AL6 0UU
Pending
6/2026/0560/HOUSE
Description
Erection of rear and side single-storey extension with conversion of garage to habitable accommodation
Nearby new applications
69 Robbery Bottom Lane Welwyn AL6 0UL
Raising the existing roof line incorporating new rooflights, new dormer, externa...
Brambles Briary Wood End Welwyn AL6 0TD
TPO 800 T1 - Chestnut tree - crown reduce by approx 4-5m - tree is multi stem an...
5 Pine Crest Welwyn AL6 0EQ
TPO 655 T1 (Oak) requires a 30% reduction to suitable lateral growth points. Thi...
4 Marlborough Close Welwyn AL6 0UG
Erection of single storey rear infill extension
Historical activity at this location
34 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
2025
Approved
Certificate of lawfulness for installation of dormer window to the rear to facilitate a l…
2025
Approved
Certificate of lawfulness for installation of dormer window to the rear to facilitate a l…
2023
Approved
Erection of first floor rear extension and installation of new side elevation window
2023
Approved
Erection of first floor rear extension and installation of new side elevation window
2023
Approved
Erection of a single storey side extension
2023
Approved
Erection of a single storey side extension
2023
Refused
Erection of two storey side extension
2023
Refused
Erection of two storey side extension
2017
Approved
Certificate of lawfulness for the extension and replacement of hard surfacing
Within ~100m
Nearby activity
2025
Approved
35 Mardley Wood Welwyn AL6 0UY
1 - Oak Tree has severe die back and is under stress. There are a number of dead branches…
2025
Approved
35 Mardley Wood Welwyn AL6 0UY
1 - Oak Tree has severe die back and is under stress. There are a number of dead branches…
2025
Approved
15 Mardley Wood Welwyn AL6 0UY
Oak to reduce back to previous. Approximately 2 meters height & width, not exceeding prev…
2025
Approved
15 Mardley Wood Welwyn AL6 0UY
Oak to reduce back to previous. Approximately 2 meters height & width, not exceeding prev…
2025
Withdrawn
1 Heathlands Welwyn AL6 0UU
1x Silver Birch tree to fell as it has dried and died TPO108 G9
2025
Withdrawn
1 Heathlands Welwyn AL6 0UU
1x Silver Birch tree to fell as it has dried and died TPO108 G9
2024
Approved
27 Mardley Wood Welwyn AL6 0UY
Reduce and reshape crown of 1 x oak tree by 20% covered by TPO 558 (2016)
2023
Approved
31 Mardley Wood Welwyn AL6 0UY
T1 Silver birch tree to remove (as it is dying) TPO 108 G6
2023
Approved
31 Mardley Wood Welwyn AL6 0UY
T1 Silver birch tree to remove (as it is dying) TPO 108 G6
2023
Approved
33 Mardley Wood Welwyn AL6 0UY
Remove middle hornbeam of the three hornbeam located at the front of the property and rem…
2023
Approved
33 Mardley Wood Welwyn AL6 0UY
Remove middle hornbeam of the three hornbeam located at the front of the property and rem…
2023
Approved
33 Mardley Wood Welwyn AL6 0UY
2x Silver Birches - remove the dead trees and offshoot as they are threat to the property…
2023
Approved
33 Mardley Wood Welwyn AL6 0UY
2x Silver Birches - remove the dead trees and offshoot as they are threat to the property…
2023
Approved
23 Mardley Wood Welwyn AL6 0UY
Erection of a part two, part single storey side and rear extension, conversion of loft in…
2023
Approved
23 Mardley Wood Welwyn AL6 0UY
Erection of a part two, part single storey side and rear extension, conversion of loft in…
2022
Approved
39 Mardley Wood Welwyn AL6 0UZ
Erection of a detached timber outbuilding in the rear garden
2022
Approved
39 Mardley Wood Welwyn AL6 0UZ
Erection of a detached timber outbuilding in the rear garden
2022
Refused
12 Heathlands Welwyn AL6 0UU
Erection of first floor rear extension
2022
Refused
12 Heathlands Welwyn AL6 0UU
Erection of first floor rear extension
2021
Refused
15 Mardley Wood Welwyn AL6 0UY
Erection of a single storey front extension and a single storey rear extension, following…
2017
Approved
23 Mardley Wood Welwyn AL6 0UY
Erection of a single storey and part two storey side extension and the installation of 1…
2016
Approved
15 Mardley Wood Welwyn AL6 0UY
30% crown reduction of the oak covered by TPO 108
2016
Approved
15 Mardley Wood Welwyn AL6 0UY
30% crown reduction of the oak covered by TPO 108
2016
Approved
27 Mardley Wood Welwyn AL6 0UY
Reduce and shape Oak tree by 20% covered by TPO 558 (2016)
2016
Approved
27 Mardley Wood Welwyn AL6 0UY
Reduce and shape Oak tree by 20% covered by TPO 558 (2016)
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