A mission team crashed a house church.
Yes, you are right. Nowhere in Scripture do we find the words PLANT A CHURCH or CHURCH PLANT. Though the following is what we do find in the WORD, and I am sure that if you are looking for it, you too will see clearly that church planting is found throughout the New Testament.
Jesus - the HERO - of the Bible established the universal Church. You can read that in Matthew 16:18, where you find Jesus who had just led his disciples to a place that no good Jew, especially a rabbi, should ever go. He took these young men - boys really - aged 14 and up to about 23 - to a place called Ceasaria Philippi. This was the heart of horrible religiousity. There were three temples there at the base of a stone mountain, alongside a grotto that leads into the mountain itself. For centuries this grotto was called the "Gates of Hell." This whole place was dedicated to the half man/half goat God called Pan (a fertility god). In those temples they used and abused the temple prostitutes in horrible religious rituals. These temple prostitutes were often children - young boys and girls - slaves who had no choice in their abuse. So Jesus led a small group of serious young men to this horrible place to show them where to build his church. In the culmination of that story, he declares to Peter, "I say to you that you are Peter, and on this rock I will build My church, and the gates of hades shall not prevail against it." You see Jesus wanted that that mess to stop. He wanted His children protected and not abused. Throughout the ministry of Jesus, He taught His disciples the Word of God; he shared communion with them. He commissioned them to make more disciples, and as the disciples obeyed that command, churches were planted. The world was forever changed.
The apostle Paul was a church planter. His commissioning by the church at Antioch in Acts 13 marks the beginning of an incredible church planting journey. For thirteen years, Paul embarked on mission adventures, and traveled 7,000+ miles and planted 14 new churches of which we know. Then there is this little piece of Scripture in Acts 19:9b-10, Paul "met separately with the disciples, conducting discussions every day in the lecture hall of Tyrannus. And this went on for two years, so that all the inhabitants of Asia, both Jews and Greeks, heard the message about the Lord." Who knows how many churches were formed through this teaching.
The other apostles were church planters as well. The whole book of Acts is an account of church planting ministry. They planted churches with little or no support from other churches and they did so while facing persecution. For most of those guys planting churches cost them their lives.