13 St Marys Avenue Northwood HA6 3AY Data via plota.co.uk
Proposal
Certificate of Lawfulness Proposed Development: Construction of single storey rear extension Data via plota.co.uk
Application progress
Approved on 9 Mar 2026 · Delegated Decision · Last checked 25 Jul 2026
Documents 7
Decision & officer reports 1
Plans & drawings 4
Application forms 1
Other documents 1
Site constraints 3
Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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 1
Last sold for £1,125,000 in September 2023. 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 January 2023, 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 Three Rivers - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- Three Rivers
- Application type
- Certificate of Lawfulness - Proposed Use
- Postcode
- HA6 3AY
- Received
- 19 Jan 2026
- Validated
- 19 Jan 2026
- Ward
- Moor Park And Eastbury
- Parish
- Batchworth Community Council
- Case officer
- Show
- Target decision
- 16 Mar 2026
- Decision
- approved
- Decision date
- 9 Mar 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 49 days from validation, 5 days faster than Three Rivers's median of 54 for extensions. Approved, as 91% of extensions here are.
Plota live figures for extensions decided by Three Rivers in the last twelve months, from validation. Three Rivers decision record →
Consultation & key dates
- Alt. reference
- PP-14633403
- Planning Portal ref
- PP-14633403
- Statutory expiry
- 16 Mar 2026
- Env. assessment
- No
Historical activity at this location
29 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Three Rivers is faster than most councils at deciding householder applications, ranking #30 out of 296. Only 24% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (91%) 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.
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13 St Marys Avenue Northwood HA6 3AY
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