Do we really need a new, larger sanctuary?
It is reasonable for a church to plan ahead and to be sensitive to the growing needs of the church family. It is also reasonable to imagine what could be accomplished in reaching others for Jesus Christ if the facilities were available. Many church growth experts believe that when a church grows to 70-80% of capacity, it will not sustain any more growth without plans for expansion.
A church can fall into materialism when it begins to value things more than people. If a new building program is for the pride of its membership rather than the effectiveness of its ministry, then the church is in danger of a bad building program. In all things, the church must desire that Christ be lifted up and that the lost are reached and that the saved be discipled to the glory of God.
We can be sure that if God wants our church to expand, He will bring leadership, unity, and resources. If those are not present, it is reasonable to take a step back and reconsider the direction. There is nothing in the Bible against a church expanding physically. The question is in the timing, motive, and purpose for the building.
Recommended Resources: Biblical Church Growth: How You Can Work with God to Build a Faithful Church by Gary McIntosh