26 Cowper Road Harpenden Hertfordshire AL5 5NG Data via plota.co.uk
Proposal
Proposed extensions and alterations to 26 Cowper Road, comprising a first floor extension above the existing garage and utility room, including the conversion of the existing garage to provide an enlarged entrance hall, WC and storage, involving the removal of the existing garage doors and installation of a new timber sash window to the front elevation; a part two storey, part single storey rear extension following demolition of the existing rear store; associated internal alterations. Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision by 18 Nov 2026, from St Albans's recent demolitions.
Site constraints 3
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 5
Last sold for £961,000 in January 2026. 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 October 2020, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
Every application in St Albans - and every UK council - as a live feed, an API, or a bulk CSV export.
Other new applications on this street
9A Cowper Road Harpenden Hertfordshire AL5 5NF
Fell one apple tree in rear garden
43 Cowper Road Harpenden Hertfordshire AL5 5NJ
Rear left corner of the garden. Holly tree. Remove tree completely.
96 Cowper Road Harpenden Hertfordshire AL5 5NH
Variation of Condition 3 (external materials) to change to render finish of plan...
Nearby new applications
9A Cowper Road Harpenden Hertfordshire AL5 5NF
Fell one apple tree in rear garden
The Stewarts Harpenden Memorial Hospital Carlton Road Harpenden Hertfordshire AL5 4TA
Felling of 1No. Cherry Tree for the following reasons: Cherry tree is leaning at...
5 The Mews Breadcroft Lane Harpenden Hertfordshire AL5 4TF
T1: Apple, lift over footway T2: Cypress trunk, remove to height of wall. T3: Ap...
4 Cornwall Road Harpenden Hertfordshire AL5 4TH
The tree (an ornamental cherry) is at the bottom of the back garden of the prope...
Harpenden Public Halls Southdown Road Harpenden Hertfordshire AL5 1PA
Discharge of Condiiton 4 (details of the proposed onsite parking) of planning pe...
Lower Ground Floor And Ground Floor And First Floor Davenport House Bowers Way Harpenden Hertfordshire AL5 4HX
T1-London Plane tree to Crown reduce by 4-6 metres all around for maintenance an...
Important details
Decision outlook
Day 87 of the 56-day target. St Albans usually decides demolitions by day 91.
Plota live figures for demolitions decided by St Albans in the last twelve months, from validation. St Albans decision record →
Public comments
No public comments yet.
9 neighbours consulted · Last counted 29 Oct 2026
Consultation & key dates
- Alt. reference
- 323115PLN
- Planning Portal ref
- 15099421
- Neighbours
- 26 Aug 2026
- Consultation
- 26 Aug 2026
- Comments by
- 26 Sept 2026
- Site or press notice
- 3 Sept 2026
- Statutory expiry
- 28 Sept 2026
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
St Albans is one of the slowest councils in England for householder decisions, ranking #285 out of 296. The council extends the time limit on 64% 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%).
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.
Track this application
26 Cowper Road Harpenden Hertfordshire AL5 5NG
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 26 Sept 2026.