Survey of London: Volume 39, the Grosvenor Estate in Mayfair, Part 1 (General History). Originally published by London County Council, London, 1977.
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Stone-Fronted Ranges
a. Nos. 37 and 38 Upper Grosvenor Street and Nos. 44–50 (even) Park Street, from north-west in 1912.

Stone-fronted ranges.
Nos. 37 and 38 Upper Grosvenor Street and Nos. 44–50 (even) Park Street, from north-west in 1912.
Blow and Billerey, architects, and William Willett, builder, 1911–12
b. Nos. 37–43 (odd) Park Street, from south-east in 1911.

Stone-fronted ranges.
Nos. 37–43 (odd) Park Street, from south-east in 1911.
W. D. Caröe, architect, and Higgs and Hill, builders, 1908–10