with open('test.txt', 'r') as f:
    data = f.read()

    data = data.split("n")
    list_of_lists = [row.split(",") for row in data]
    final_list = [{"building_type": row[0].strip(),
                   "material": row[1].strip(),
                   "your_keys": row[2].strip()} for row in list_of_lists]
    print(final_list)

[{'building_type': 'house', 'material': 'brick', 'your_keys': '876'},
 {'building_type': 'apartment', 'material': 'wood', 'your_keys': '345'},
 {'building_type': 'condominium', 'material': 'brick', 'your_keys': '453'}]