18 Thirsk Road Borehamwood Hertfordshire WD6 5AX Data via plota.co.uk
Proposal
Single storey rear extension. Depth: 4.00m, Height: 2.76m, Eaves: 2.65m. Data via plota.co.uk
Application progress
Approved on 29 Jan 2026 · Delegated Decision · Last checked 5 Oct 2026
Documents 5
Decision & officer reports 2
Plans & drawings 2
Application forms 1
Site constraints 1
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England 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 2
Last sold for £525,000 in November 2025. 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 August 2022, the latest held for this property. The building may have changed since. View the certificate
Every application in Hertsmere - and every UK council - as a live feed, an API, or a bulk CSV export.
Nearby new applications
17 Warenford Way Borehamwood Hertfordshire WD6 5ER
Sub-division of dwelling house into 2no. flats to include provision of waste/cyc...
53 Caishowe Road Borehamwood Hertfordshire WD6 5JB
Single storey front, side and rear extension. (Retrospective application).
26 Caishowe Road Borehamwood Hertfordshire WD6 5JA
Demolition of existing outbuilding to facilitate construction of single storey s...
129 Cowley Hill Borehamwood Hertfordshire WD6 5NA
Demolition of existing outbuildings to facilitate construction of two storey sid...
48 Stanborough Avenue Borehamwood Hertfordshire WD6 5LP
Single storey rear extension.
100 Hartforde Road Borehamwood Hertfordshire WD6 5JS
Single storey rear extension. Conversion of loft to habitable space including re...
Important details
- Council
- Hertsmere
- Application type
- PD- Prior Approval 42 day (Hsehold ext)
- Postcode
- WD6 5AX
- Received
- 17 Dec 2025
- Validated
- 17 Dec 2025
- Ward
- Borehamwood Cowley Hill
- Parish
- Elstree & Borehamwood Town Council
- Case officer
- Show
- Target decision
- 3 Feb 2026
- Decision
- PD42 - Prior Approval not required
- Decision date
- 29 Jan 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- AG ArchiStructure
How this decision compares
Decided in 43 days from validation, 12 days faster than Hertsmere's median of 55 for extensions. Approved, as 86% of extensions here are.
Plota live figures for extensions decided by Hertsmere in the last twelve months, from validation. Hertsmere decision record →
Public comments
No public comments yet.
2 neighbours consulted · Last counted 5 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14571563
- Planning Portal ref
- PP-14571563
- Neighbours
- 19 Dec 2025
- Consultation
- 19 Dec 2025
- Comments by
- 13 Jan 2026
- Statutory expiry
- 3 Feb 2026
- Env. assessment
- No
Historical activity at this location
8 nearby applications on record - archival context, not part of the live application.
Nearby activity
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%).
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
18 Thirsk Road Borehamwood Hertfordshire WD6 5AX
Tracking this application
Not there in a minute? Check junk - especially Hotmail and Outlook.
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.