This is Jeffrey's St, one of the oldest streets in Camden and Kentish Town, London.
Plans to build this street were drawn up in the 1790s but the first four houses on Jeffreys St were completed in 1816. Most of the others by the early 1820s and the last group on the south (even) side were added in the 1840s.
Our houses pre-date the online Census but there are still reliable records we can look up. The first person to document when a new house was complete and inhabited was the tax man. Camden Local Studies Library in Holborn has all of the tax (poor relief) records for our parish so we can look to see when each of our houses was built and who first moved in. (Start with Utah Microfilm no 542-593 for St Pancras Parish North). Jeffreys Street does not exist before July 1816 and then just four houses are document