The money will be used to help people move into shelters in the coming months before winter arrives.
The latest Government figures show there were 178 rough sleepers in the city in 2017.
Brighton and Hove City Council’s lead member for rough sleeping Councillor Clare Moonan said: “A lot of thought and planning went into our bid so we will be hitting the ground running on this.
“People who end up sleeping rough often have complex needs and have had to deal with very difficult circumstances in their lives.”
Cllr Moonan added: “Our focus isn’t just on getting them off the streets – it’s also on making sure they get the services they need to sustain their lives off the streets and not relapse into rough sleeping.
“Around half the city’s rough sleepers are not from Brighton and Hove.
“So there will also be more support for work helping these people reconnect with the areas they have come from so that they can get the accommodation and services they need.”
The money will improve services such as expanding the number of beds in churches that offer night shelters.
Labour MP for Kemptown and Peacehaven Lloyd Russell-Moyle said: “Congratulations to the council for securing this funding.
“It shouldn’t just go towards hiring people but we need to increase our infrastructure.
“We should engage in those who want to services, and have zero tolerance on those who refuse the services.”