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Permitted23227/APP/2017/4510Rear extension

27 Whitethorn Avenue Hillingdon UB7 8JX

Part two storey, part single storey rear extension and conversion from 1 x 4-bed dwelling to 1 x 2-bed and 1 x 1-bed self-contained flats with associated parking and amenity space.

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Map of the site

Progress

Submitted
—
— completed
Validated
—
— completed
Consultation
—
— completed
Target date
—
— completed
Decided
15 Mar 2018
— completed

Application details

Reference
23227/APP/2017/4510
Local authority
Hillingdon
Postcode
UB7 8JX
Ward
YIEWSLEY
Application type
All Other
Property type
Flat

Key dates

Decided
15 Mar 2018

Estimated project value

£38k–£69k

Typical UK cost for this job type, at outer London rates (2026). Estimated from the proposal description — planning applications do not state build cost. Source: MyJobQuote / Checkatrade 2026, ~20m² at £1,800-£3,000/m².

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.

Homes here go for about £430,000 — the median of the last 7 market sales in UB7 8JX, £285,000 to £537,500.

Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.

Planning constraints

No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.

Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.

Nearby applications