89 High Street Hampton Hill TW12 1NH Data via plota.co.uk
Proposal
Conversion of two flats into single dwellinghouse. Construction of single storey rear ground floor extension with ASHP. Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicted a decision around 28 Oct 2026; it is now day 460.
Site constraints 21
Checked on 15 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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 £650,000 in June 2024. 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 2023, the latest held for this property. The building may have changed since. View the certificate
Every application in Richmond upon Thames - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- Richmond upon Thames
- Application type
- Full Application
- Postcode
- TW12 1NH
- Received
- 21 May 2025
- Validated
- 25 Jul 2025
- Ward
- Fulwell & Hampton Hill Ward [FLW]
- Case officer
- Show
- Target decision
- 19 Sept 2025
- Applicant
- Show
- Agent
- Tomoko Hayashi
Decision outlook
Day 460, past the statutory target. 84% of full applications in Richmond upon Thames are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 22 Oct 2026.
Plota live figures for full applications decided by Richmond upon Thames in the last twelve months, from validation. Richmond upon Thames decision record →
Consultation & key dates
- Alt. reference
- PP-14034462
- Comments by
- 26 Jun 2025
- Site or press notice
- 6 Jun 2025
- Statutory expiry
- 15 Aug 2025
Historical activity at this location
26 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Richmond upon Thames ranks #130 out of 296 councils for householder decision speed. Richmond upon Thames is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% 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.
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89 High Street Hampton Hill TW12 1NH
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The consultation period closed on 26 Jun 2025.