20A St James Road Harpenden Hertfordshire AL5 4PB
Under Consideration
5/2026/0275 - HSE
Description
Single storey rear extension
Other new applications on this street
Nearby new applications
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18 Fallows Green Harpenden Hertfordshire AL5 4HD
Installation of a timber-built greenhouse in the rear garden
29 Noke Shot Harpenden Hertfordshire AL5 5HS
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12 Pigeonwick Harpenden Hertfordshire AL5 4EZ
3 Lindley Court Lindley Close Harpenden Hertfordshire AL5 4HT
Historical activity at this location
33 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
2023
Refused
Non Material Amendment - Rear dormer window cladding from metal sheets to slate tiles and…
2023
Refused
Non Material Amendment - Rear dormer window cladding from metal sheets to slate tiles and…
2022
With conditions
Hip to gable loft conversion to form habitable living space with rear dormer window. Alte…
2022
With conditions
Hip to gable loft conversion to form habitable living space with rear dormer window. Alte…
2016
With conditions
Two storey side extension, part single storey part two storey rear extension with rooflig…
2016
With conditions
Two storey side extension, part single storey part two storey rear extension with rooflig…
2016
Approved
Certificate of Lawfulness (proposed) - Loft conversion comprising change of half hipped r…
2016
Approved
Certificate of Lawfulness (proposed) - Loft conversion comprising change of half hipped r…
Within ~100m
Nearby activity
2025
With conditions
60 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Part single-storey and part two-storey pitched roof rear extension with raised patio to r…
2025
With conditions
60 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Part single-storey and part two-storey pitched roof rear extension with raised patio to r…
2025
With conditions
62 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Proposed single storey rear extension with rooflight and extending the existing side exte…
2025
With conditions
62 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Proposed single storey rear extension with rooflight and extending the existing side exte…
2023
41 St James Road Harpenden Hertfordshire Al5 4Pb
Front canopy porch, single storey rear extension, and replacement roof to existing single…
2023
41 St James Road Harpenden Hertfordshire Al5 4Pb
Front canopy porch, single storey rear extension, and replacement roof to existing single…
2023
56 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Single storey rear extension and alterations to openings
2023
56 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Single storey rear extension and alterations to openings
2023
28 St James Road Harpenden Hertfordshire Al5 4Pb
Single storey rear extension with rooflights, part first floor, part two storey side exte…
2023
28 St James Road Harpenden Hertfordshire Al5 4Pb
Single storey rear extension with rooflights, part first floor, part two storey side exte…
2023
47 St James Road Harpenden Hertfordshire Al5 4Pb
Two storey side extension following removal of single storey attached garage, alterations…
2023
47 St James Road Harpenden Hertfordshire Al5 4Pb
Two storey side extension following removal of single storey attached garage, alterations…
2021
With conditions
40 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Single storey side and rear extension with rooflights and alterations to openings
2021
With conditions
40 Willoughby Road Harpenden Hertfordshire Al5 4Pd
Single storey side and rear extension with rooflights and alterations to openings
2021
With conditions
22 St James Road Harpenden Hertfordshire Al5 4Pb
Proposed two storey side extension; single storey rear extension; loft conversion with ro…
2021
With conditions
22 St James Road Harpenden Hertfordshire Al5 4Pb
Proposed two storey side extension; single storey rear extension; loft conversion with ro…
2020
With conditions
20 St James Road Harpenden Hertfordshire Al5 4Pb
Two storey side and part single, part two storey rear extensions with rooflights followin…
2020
With conditions
20 St James Road Harpenden Hertfordshire Al5 4Pb
Two storey side and part single, part two storey rear extensions with rooflights followin…
2020
With conditions
46 St James Road Harpenden Hertfordshire Al5 4Pb
Single storey rear extension, front porch canopy, replacement rear dormer window, install…
2020
With conditions
46 St James Road Harpenden Hertfordshire Al5 4Pb
Single storey rear extension, front porch canopy, replacement rear dormer window, install…
2018
Withdrawn
34 St James Road Harpenden Hertfordshire Al5 4Pb
Part single, part two storey side and rear extensions with rooflights and single storey f…
2017
Approved
34 St James Road Harpenden Hertfordshire Al5 4Pb
Prior Notification - Single storey rear extension 4.0m in height x 6.0m in depth with 3.0…
2017
With conditions
31 St James Road Harpenden Hertfordshire Al5 4Pb
Single storey side and rear extensions, new front porch and installation of rooflights
2016
With conditions
25 St James Road Harpenden Hertfordshire Al5 4Pb
First floor side and single storey rear extensions
2016
With conditions
25 St James Road Harpenden Hertfordshire Al5 4Pb
First floor side and single storey rear extensions
St Albans
Planning Authority Score
1.2/10
Poor
#287 of 292 councils
Relevant to this application:
Householder decisions
St Albans is one of the slowest councils in England for householder decisions, ranking #282 out of 292. The council extends the time limit on 61% of applications - one of the highest rates in England. Expect your application to take longer than the standard deadline. Householder applications are slightly less likely to be approved here (88%) than the national average (90%).
Among the slowest councils in England
for householder decisions
These figures are council-wide context, not a prediction for this application.
View full council performance
St Albans decision performance
Based on MHCLG data, 2025
86%
Overall approval rate
Below avg (87%) #195 of 292
88%
Householder approved
Below avg (90%) #223 of 292
32%
Decided in 8 weeks
Below avg (64%) #282 of 292
61%
Extended time limit
Above avg (40%) #270 of 292
71%
Minor dwellings approved
127 decided (1-9 homes)
69%
Major dwellings approved
16 decided (10+ homes)
77%
Change of use approved
22 decided
1,375
Total decisions
195 refused in 2025