The Bible does not provide instructions or directives on the location where a marriage is legally established. This is yet another area in life where there is Christian freedom.
Certainly, a God-pleasing course of action that many Christians choose is having a marriage service take place in church. The house of the Lord is where God’s people gather regularly to hear his word and offer him their prayers and praises. The house of the Lord is a fitting place where marriage, one of God’s gifts, can be “consecrated by the word of God and prayer” (1 Timothy 4:5).
Ultimately, the venue of a wedding is not the most important matter. What is all-important is understanding what the Bible says about marriage. It is the lifelong union between a man and a woman (Genesis 2:24; Matthew 19:4-6).