Is it true? No.
The word translated as church in the New Testament of the Bible is “ecclesia,” a decision making body. While it’s true that the building isn’t the church, and the church can be any type of building, home, even a tent or a tree to gather under, individuals in the office, marketplace, school, etc. are not, by themselves, the church. The gathering of believers to worship, fellowship and learn together is the church.
Is it true? No.
The first churches—until the late 200’s, met in homes and did not have separate buildings. It takes hundreds of thousands, even millions of dollars to build, buy and maintain church buildings, taking resources away from proclaiming the gospel. In many countries, church buildings make the Christians there a target for persecution and terrorist attacks; in those settings, house churches or night meetings in the woods work better, are closer to the original church and are no less real.
Urban Legends About God, the Bible & the Christian Life 