Delaware Code
Chapter 44. BUILDING PERMITS AND CONSTRUCTION CODES
§ 4407. Permits required.

(a) A building permit shall be obtained from the county government for any new construction of any kind including additions or alterations to existing structures.
(b) Before issuing a building permit, the county government may require the builder or homeowner to have a permit for waste disposal from the Division of Environmental Control.
(c) The county government may by resolution waive the requirement for a building permit under specified terms and conditions as may be established by the county government but no waiver shall be permitted where the value of the work to be done exceeds $500.
(d) A building permit shall be required for the construction, erection, placement or alteration of any smokestack, tree, silo, flagpole, elevated tank, power line, radio or television tower, antenna, building, structure or other improvement to real property which:

(1) Is greater than 200 feet in height above ground level;
(2) Is greater in height than an imaginary trapezoidal shape beginning at the end of a runway of a public use airport, at an initial width of 50 feet and extending outward and upward at a slope of 100:

(3) Is located within the approach runway area of each public use airport; or
(4) Otherwise acts as an obstruction to the operation of aircraft as those terms are defined in Chapter 6 of Title 2 or by Federal Aviation Regulations (FAR) Part 77 [14 C.F.R. Part 77].
(e) Such building permit for each such object or structure will not be issued until such time as the Department through the Office of Aeronautics has approved the application. The Department of Transportation, through the Office of Aeronautics, shall respond to the county or municipality having land use jurisdiction, regarding any objections it has to the issuance of a building permit, within 30 days of receipt of such permit for review.