44-50 Park Street and 37 Upper Grosvenor Street is a Grade II listed building in the Westminster local planning authority area, England. First listed on 1 December 1987. Terrace of houses. 28 related planning applications.

44-50 Park Street and 37 Upper Grosvenor Street

WRENN ID
blind-merlon-onyx
Grade
II
Local Planning Authority
Westminster
Constituency
Cities of London and Westminster MP: Rachel Blake (Lab)
Country
England
Date first listed
1 December 1987
Type
Terrace of houses
Address
44-50 Park Street and 37 Upper Grosvenor Street, City of Westminster, W1K 2JJ
OS grid reference
TQ 282 806
Coordinates
51.51002, -0.15399
Source
Historic England listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

This is a terrace of houses located on Park Street and Upper Grosvenor Street, built in the early 20th century by Blow and Billerey. The building is constructed of Portland stone, with a roof that is not visible. It is three storeys high, plus an attic, with dormers. The facade has fifteen bays. Channelled rustication is used throughout, with the deepest rustication on the ground floor. The central three bays project slightly and feature round-headed windows and an entrance flanked by giant Ionic columns that rise through the first and second floors to the attic, which is topped by a pediment containing an oval window. Alternating arched and square-headed windows are present on the ground floor. Paired porches project from the third and fourth bays from the right and the left-hand bay. The entrances have glazed doors with wrought iron screens. The first-floor windows are square-headed with metal casements and small panes. A modillion cornice runs above the second floor, with a smaller dentil cornice beneath the attic. A balustraded parapet tops the building. The side returns are similar in style. Wrought iron area railings are also present.

Local climate

44-50 Park Street and 37 Upper Grosvenor Street sits in one of the driest parts of the UK, with an average of 700 mm of rain a year. This makes it drier than 93% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 94% of listed buildings.

It experiences an average of 34 freeze-thaw cycles a year, more than 51% of listed buildings. Of these, 15 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 9 transactions since 1995
  • Related listed building consents — 28 applications
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. 12, Upper Grosvenor Street W1 Grade II 60 m
  2. 9, Upper Grosvenor Street W1 Grade II 65 m
  3. 58, Park Street W1 Grade II 69 m
  4. 34, Park Street W1 Grade II 71 m
  5. 7, Upper Grosvenor Street W1 Grade II 72 m
  6. 44, Upper Grosvenor Street W1 Grade II 75 m
  7. 6, Upper Grosvenor Street W1 Grade II 75 m
  8. 60, Park Street W1 Grade II 77 m
  9. 54, Mount Street, W1 Grade II* 78 m
  10. 45, Reeves Mews W1 Grade II 79 m