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Portman Street runs north from Oxford Street to Portman Square, forming one of the principal southern approaches to the square and sitting entirely within the Portman Estate. At approximately 154 metres in length, it is a short connector street, but its position on the estate's southern boundary gives it a distinct commercial and residential character.
Like all streets in this part of west Marylebone, Portman Street takes its name from the Portman family, whose landholding here dates to 1532. The estate, which covers around 110 acres, was gradually developed from the mid-18th century outward from Portman Square, with the surrounding streets laid out to serve the new residential quarter that emerged on what had previously been open fields. Portman Street formed part of this grid, connecting the square to the Oxford Street frontage and giving it practical as well as social links to the wider West End.
The street today carries a mix of ground-floor retail and hospitality uses alongside upper-floor offices and residential accommodation, consistent with the Portman Estate's active management of the area. It is closely associated with the wider estate streetscape, which runs from Oxford Street in the south through to Crawford Street to the north. For the architectural and historical context of the square at its northern end, see Portman Square, which contains Robert Adam's Home House and the estate's most significant Georgian set piece.
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