OK, this is not going to be easy, and I can't give clues because I don't know the answer!
Where could this be?
It was originally suggested to be the south side of Newmarket, with the side street visable on the right being Mill Lane, (the narrow street that runs down to no. 10 Mill Street), but it can't be, because the shadows tell us that the photograph was taken sometime around midday, so the buildings must face south, or maybe east or west, but certainly not north.
The house on the left is a paired-down 'Dutch Billy', so we're talking not much later than the 1750s at the latest, and it looks like it could be one of a pair with it's neighbour, out of view to the left.
The white house is a standard 19th century vernacular structure which suggests a slightly more edge of town location. They're found everwhere from Arbour Hill to the Liberties and places like Harold's Cross Road, but they were also found closer in, in places such as the back of Hill Street and Wood Lane off Hendrick Street.
I feel that the best clue is going to be that wide set-back beyond the path, that rules out a lot of streets.
Obviously there'll be bonus points for anyone who can name the kid with the kite.
P.S. being a lantern slide, there's also a possibility that the picture is backwards!