After British war of 1857, Coastal region of Maharashtra including Shirgaon, Kelwe, Mahim, Tarapore was captured by British ruler.

Historical Name of Shirgaon during Portuguese ruling was Sirgão. In 1720, one of the ports of Bassein, Kalyan, was conquered by the Marathas and in 1737, they took possession of Thane including all the forts in Salsette island and the forts of Parsica, Trangipara, Saibana (Present – Saivan, south bank of the Tansa river), Ilha das Vaccas – (Island of Arnala), Manora (Manor), Sabajo (Sambayo/Shabaz (near Belapur) – present day Belapur fort photo) the hills of Santa Cruz and Santa Maria.

The only places in the Northern Provinces that now remained with the Portuguese were Chaul (Revdanda), Caranja, Bandra, Versova, Bassein, Mahim, Quelme (Kelve) -(Kelve/Mahim), Sirgão (Present day Shirgao), Dahanu SaoGens (Sanjan), Asserim (Asheri/Asherigad Photo1), Tarapor (Tarapur) and Daman.