If the work is structural and the cost will total more than $2,500 for labor and materials, a building permit is required. A permit is always required for the following activities: land clearing; fill; demolition; blasting; excavation; storage of materials; signs; storage sheds; tie-down of habitable structures; new electrical, mechanical, or plumbing work; all life safety, structural and floodplain work; fences; roofing of areas over 100 square feet.
Check the Village Code on Ch. 6, Sec. 61.