Why choose holland contracting? For 55 years Holland Contracting has provided complete construction services in Northern Iowa, emerging as a regional leader in the commercial, industrial, and scholastic sectors of our industry.Where is accessholland power services located? Holland Power Services' head office is in Atlantic Canada and our affiliated companies are located in Quebec, Ontario and Maine.How do i contact the construction company? Fill out the form or call us at 618-277-8870 to talk with our team today. Select which best describes you I am looking for construction services for a commercial office, retail, or industrial project.