Commercial builders specialize in the development and construction of projects in the commercial sector, such as buildings, factories, manufacturing and processing plants, distribution centers, office space, retail stores, educational facilities, hotels, health care facilities, parking structures, and more.  They are involved with designing, planning, and implementing construction projects at many levels within the commercial sector.   Commercial builder responsibilities may include land acquisition and development, demolition, architectural planning and design, budgeting and legal issues, general contracting services, subcontracting services, usage requirements, sales and marketing, and more.   Green construction includes designing buildings that are more environmentally friendly, that utilize renewable, sustainable and/or recycled materials, and that incorporate energy efficiency and conservation in the design process.  Commercial builders listed in this section are experienced with environmentally friendly and green building practices and design.  Some may be LEED certified.