Builders are different, some carry out their work in good faith, and others after the sleeves. This happened with several small cottages. Money was allocated for their construction, but for the most part they were stolen, and what was left was built for what was practically unsuitable for life. The erected houses have roofs, doors and windows, but some walls are incomplete and holes gap in them. Your task in Construct House 3D is to complete the imperfections so that people can get new housing. You have a universal block with which you can fill in the empty spaces.