The house church concept stems from Acts 2:42-47, which describes the early Christians meeting and worshiping in homes. Many people start or join house churches because they want to try it, haven't benefited from a local church or are part of a group that is ready to form its own church. According to SmallGroups.com, a website that provides resources to small church groups, the advantages of a house church include not worrying about a large building or creating programs and not having to figure out outreach strategies.
Pray. According to SmallGroups.com, prayer is "the first step to starting a house church.” It's not enough to start a house church simply because it seems to be a good idea; it must also be God’s idea. Praying gives you a chance to determine if starting a house church is the right thing to do and something to which you're ready to devote time and effort.
Figure out your target worshiper. To keep a house church at a manageable size keep a particular type of member in mind. For example, target worshipers could be business owners, new believers or young adults. Instead of trying to be popular, a house church must focus on developing a strong, committed group of people who support one another.
Plan a place to worship. The best home is one that easily accommodates up to 12 worshipers, according to SmallGroups.com. Some house groups always meet at the same home while others rotate among members’ homes.
Figure out how your house church will worship. Determine if one individual will always lead the service or if members will take turns leading. Also, figure out the layout of the services: time for music, fellowship, the Bible lesson and study, and so on.
Schedule meeting times. Gene Edwards, author of “How to Start a House Church from Scratch,” recommends house church groups gather at least once a week.