From any subway station in Rio
By Subway: just go to Botafogo station and take a walk down Rua São Clemente Street to Rua Estácio Coimbra 84 (2nd street on your left)

From the central bus station (rodoviária)
By bus:
Take 173 bus (30 minutes) and step out in front of Casa de Rui Barbosa; or
Take 172 bus (40 minutes) and step out in front of Casa de Rui Barbosa
By Taxi:
25 minutes

From the local airport (Santos Dumont)
By Bus:
Take a Real (air conditioning) bus (20 minutes) to Praia de Botafogo; or
Take 438 bus (20 minutes) and step out in front of Casa de Rui Barbosa; or
Take 472 bus (20 minutes) and step out in front of Botafogo shopping mall
By Taxi:
15 minutes

From the international airport (Tom Jobim)
By Bus:
Take a frescão (air conditioning bus) to Copacabana , get off the bus at Botafogo beach and walk 3 minutes down São Clemente Str.
By Taxi (buy the ticket inside the airport check-out lobby):
30 minutes