26 Aldenham Avenue Radlett Hertfordshire WD7 8HX Data via plota.co.uk

Awaiting decision 26/1374/HSE
Date received
23 Sept 2026
Date validated
23 Sept 2026
Postcode
WD7 8HX

Description

Proposed single storey rear extension. Data via plota.co.uk

Last checked

Decision outlook

Plota predicts a decision around 17 Nov 2026, from Hertsmere's recent extensions.

Day 16 of the 56-day target. Hertsmere usually decides extensions by day 55.

Day 1640 days to the 56-day target
70%decided within 8 weeks
86%approved
475decided in the last year

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

Site constraints 2

Also on the record
Radon affected area, class 3; Inside the Radlett built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) 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.

Sales history 1

Last sold for £1,200,000 in November 2015. Detached house, freehold.

30 November 2015£1,200,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area172 m² (1,851 sq ft)
Energy ratingF (24 out of 100), could reach B
PropertyDetached house, 9 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in July 2015, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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About Plota's data service
Hertsmere
Planning Authority Score
3.3/10
Poor
#225 of 296 councils
Relevant to this application:
Householder decisions

Hertsmere is slower than most councils at deciding householder applications, ranking #243 out of 296. 55% of applications have the time limit extended, above the 41% national average. Householder applications are slightly more likely to be approved here (94%) 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
Hertsmere decision statistics
Based on MHCLG data, the year to March 2026
93%
Overall approval rate
Above avg (87%) #57 of 296
94%
Householder approved
Above avg (90%) #108 of 296
49%
Decided in 8 weeks
Below avg (63%) #243 of 296
55%
Extended time limit
Above avg (41%) #249 of 296
84%
Minor dwellings approved
102 decided (1-9 homes)
75%
Major dwellings approved
8 decided (10+ homes)
89%
Change of use approved
27 decided
742
Total decisions
55 refused in the year to March 2026

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.