350 Cassiobury Drive Watford WD17 3AW Data via plota.co.uk
Proposal
(Retrospective) Erection of single storey rear outbuilding with hipped roof, brick walls and clay plain tile roof. and WC. (AMENDED PLANS) Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicted a decision around 29 Oct 2026; it is now day 107.
Documents 10
Plans & drawings 6
Application forms 2
Site constraints 4
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 £1,150,000 in March 2022. Semi-detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in December 2021, the latest held for this property. The building may have changed since. View the certificate
Every application in Watford - and every UK council - as a live feed, an API, or a bulk CSV export.
Other new applications on this street
346 And 348 Cassiobury Drive Watford WD17 3AW
Erection of single storey and first floor rear extensions to the existing dwelli...
195 Cassiobury Drive Watford WD17 3AL
Demolition of outbuilding, erection of part single, part two storey rear extensi...
39 Cassiobury Drive Watford WD17 3AA
Non - material amendment pursuant to planning permission 26/00153/FULH for chang...
157 Cassiobury Drive Watford WD17 3AL
Proposed roof alteration involving double hip-to-gable conversion; erection of a...
Nearby new applications
10 Armand Close Watford Hertfordshire WD17 4SQ
Conversion of existing side garage into habitable space, erection of part ground...
195 Cassiobury Drive Watford WD17 3AL
Demolition of outbuilding, erection of part single, part two storey rear extensi...
223 Hempstead Road Watford WD17 3HH
Works to trees under A1 TPO.226 Fell Ash (T1) and Conifer (T2) - due to damaging...
31 Nascot Wood Road Watford WD17 4WE
Demolition of the existing dwelling and erection of a replacement two-storey det...
346 And 348 Cassiobury Drive Watford WD17 3AW
Erection of single storey and first floor rear extensions to the existing dwelli...
15 Wentworth Close Watford Hertfordshire WD17 4LW
Erection of double and single storey front, side and rear extensions with intern...
Important details
Decision outlook
Day 107, past the statutory target. 99% of extensions in Watford are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 27 Oct 2026.
Plota live figures for extensions decided by Watford in the last twelve months, from validation. Watford decision record →
Public comments
No public comments yet.
6 neighbours consulted · Last counted 27 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14886163
- Planning Portal ref
- PP-14886163
- Comments by
- 4 Aug 2026
- Env. assessment
- No
Historical activity at this location
31 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Watford is faster than most councils at deciding householder applications, ranking #41 out of 296. Only 21% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Watford is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use
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.
Track this application
350 Cassiobury Drive Watford WD17 3AW
Tracking this application
Not there after a minute? Check your junk folder. It's from alerts@plota.co.uk.
Go to your dashboard →Sign in to view contact details
Applicant and case-officer names are hidden from public view for privacy. Create a free Plota account - or sign back in - and we'll show them, plus you get a dashboard for alerts and tracked applications.
The consultation period closed on 4 Aug 2026.