It begins in the north at Streatham Hill railway station, being an end-on junction with Streatham Hill and continues south to Norbury where the A23 becomes London Road.
In 2002 it was voted, in a contentious BBC/Commission for Architecture and the Built Environment poll, to be Britain's Worst Street – largely thanks to its traffic problems, and a generally poor ambience (run-down shopfronts, damaged pavements).
Even before this report had appeared, a plan was being formulated by Transport for London Street Management (who are legally responsible for the road and pavement maintenance, signage and street furniture) and the London Borough of Lambeth's Highways and Streatham Town Centre Management teams to improve Streatham High Road.
After 0.6 mile (0.96 km) there is a large junction complex, where Tooting Bec Gardens (A214) and Mitcham Lane (A216) join the A23.
On the east is Streatham Common; and at the end of the High Road is Norbury Park.