23 Granby Avenue Harpenden Hertfordshire AL5 5QP Data via plota.co.uk
Under Consideration
5/2026/0398 - HSE
Description
Two storey rear extension, single storey side and rear extension, alteration to openings and rooflights, replacement windows and doors, new roof awning over front door Data via plota.co.uk
Other new applications on this street
Nearby new applications
43 Granby Avenue Harpenden Hertfordshire AL5 5QP
Following demolition of store rooms etc, proposed two-storey side and rear exten...
7 Grasmere Avenue Harpenden Hertfordshire AL5 5PT
TWO STOREY SIDE AND REAR EXTENSION. SINGLE STOREY SIDE AND REAR EXTENSION. FRONT...
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6 Barton Close Harpenden Hertfordshire AL5 4QT
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Historical activity at this location
27 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
Within ~100m
Nearby activity
2025
Approved
8 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Single storey side and rear extensions, following demolition of conservatory and garage
2025
Approved
8 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Single storey side and rear extensions, following demolition of conservatory and garage
2025
Approved
17 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Variation of Condition 2 (approved plans) to make changes to the roof detail of the rear…
2025
Approved
17 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Variation of Condition 2 (approved plans) to make changes to the roof detail of the rear…
2024
Approved
17 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Part single, part two storey rear extension, first floor side extension and alterations t…
2022
Approved
30 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Part single, part two storey front extension, conversion of garage to habitable accommoda…
2022
Approved
30 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Part single, part two storey front extension, conversion of garage to habitable accommoda…
2022
Approved
12 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Single storey side extension, insertion of rooflights, alterations to existing porch roof…
2022
Approved
12 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Single storey side extension, insertion of rooflights, alterations to existing porch roof…
2022
Approved
37 Granby Avenue Harpenden Hertfordshire Al5 5Qp
T1 rear garden Beech - crown thin by 15% and crown lift over the garden and the road ( La…
2022
Approved
37 Granby Avenue Harpenden Hertfordshire Al5 5Qp
T1 rear garden Beech - crown thin by 15% and crown lift over the garden and the road ( La…
2022
Approved
1 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Two storey side extension, alterations to roof with front rooflight, single storey rear e…
2022
Approved
1 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Two storey side extension, alterations to roof with front rooflight, single storey rear e…
2021
Approved
37 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Single storey rear extension with new rear patio and fence, insertion of rear dormer wind…
2021
Approved
37 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Single storey rear extension with new rear patio and fence, insertion of rear dormer wind…
2021
Approved
57 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Demolition of existing loft accommodation, construction of side and rear extensions, rais…
2021
Approved
57 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Demolition of existing loft accommodation, construction of side and rear extensions, rais…
2021
Approved
9 & 10 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Raising and extension of roofs with rear dormer windows and front roof lights to create h…
2021
Approved
9 & 10 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Raising and extension of roofs with rear dormer windows and front roof lights to create h…
2021
Refused
37 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Single storey rear extension, insertion of rear dormer window to existing loft space, rem…
2017
Approved
25 Langdale Avenue Harpenden Hertfordshire Al5 5Qu
Front porch
2016
Approved
52 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Two storey side extension, new porch and alterations to openings
2016
Approved
52 Granby Avenue Harpenden Hertfordshire Al5 5Qr
Two storey side extension, new porch and alterations to openings
2016
Approved
25 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Two storey side and part single, part two storey rear extension, side rooflights, new por…
2016
Approved
25 Granby Avenue Harpenden Hertfordshire Al5 5Qp
Two storey side and part single, part two storey rear extension, side rooflights, new por…
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