Ключевые слова: abstract, answer, architecture, asking, assistance, building, building activity, concept, concepts, confusion, construction, construction industry, domestic life, doubt, emotional stress, estate, faq, faqs, graphic, home, home ownership, house, housing, icon, ideas, interrogation, mark, mortgage, problem, problems, property, query, question, question mark, questions, radon, radon gas, radon test, real, real estate, residential building, sign, solution, stress, support, symbol, uncertainty,