Capitalization for the word church is as follows:
Cap church when it is part of the title of a church organization.
...went to the First Baptist Church...
...drove past Holy Nativity Episcopal Church...
Cap church when it is the entity -- used mostly for the Catholic denomination:
...know that the Church is against abortion...
...do not think the Church will change its stand on women priests...
Cap church when it is a party to a lawsuit:
...claimed that the Church violated the rights of...
Do not cap church when it refers to the building or people when it is not part of a name:
...know there is a Presbyterian church nearby...
...think the church is in a state of disrepair...
Happy punctuating!
Margie