The institutional changes of the mid-19th century made the modernisation of the Brazilian economy possible, as well as that of credit relations. We sought to evaluate the mortgage market before and after the 1864 reform and the institution of the Banco do Brasil's mortgage portfolio in 1867. We found a very comprehensive market throughout the territory in 1855-1859, although concentrated in the main urban centres. The evidence shows the expansion of mortgages after the two measures taken, but at the end of the 19th century this expansion came to an end.