The houses on the west side in the southern end of the road were originally known as Portland Gardens.
Portland Road was built by speculative developers in the 1850s on a strip of land between the affluent Ladbroke Estate to the east and the Norland Estate to the west, home to the Potteries and Piggeries, one of the most notorious slums in London.
[1][2] At first all the houses were rented and in the southern part occupied by well-off tenants with households of more modest means further north.
Notting Hill slum landlord Peter Rachman owned property in the road.
By the early twenty-first century, the southern end of the road had become a "ghetto" for bankers and it has been used as a case study of the gentrification of London streets.