In 1861 Brown also contributed to drawing up the plans and specifications for the British Anglican Garrison Church built on Lot 105 in the foreign settlement. The Garrison Church, also known as Christ Church, was the forerunner of Christ Church, Yokohama, rebuilt in 1901 on a prominent position on the Bluff overlooking the Port of Yokohama. On Lot 167 in the heart of the Kannai commercial district, Brown was also able to establish a Reformed Church, later named in 1872 as Union Church, Yokohama.