Construction of commercial buildings; construction of residential buildings and homes; offsite construction of commercial buildings or parts thereof; offsite construction of residential buildings and homes or parts thereof; assembly services for prefabricated or portable modular buildings or parts thereof; installation services for prefabricated or portable modular buildings or parts thereof; maintenance and repair services for prefabricated or portable modular buildings or parts thereof; providing information and consultancy services relating to construction; onsite construction project management; offsite construction project management; technical consultation in the field of construction; construction services, namely, planning, laying out of the custom construction of residential and commercial communities and buildings; consultation services in the field of construction of environmentally-conscious buildings