Pole barns and barndominiums in Sussex County, Delaware.

Start with the Sussex County Building Permit Office, 2 The Circle, P.O. Box 589, Georgetown, DE 19947, (302) 855-7720, which takes walk-in applications from 8:30 a.m. to 4:30 p.m. on weekdays. Every project in Sussex, from new work to remodeling and additions, needs a County building permit, whether the property is inside a municipality or in the unincorporated county. Plan review runs through the Building Code Office, (302) 855-7860; inspections are booked at (302) 858-5500; and Planning & Zoning, (302) 855-7878, handles zoning and setbacks.

A pole-building permit needs one complete, scaled plan set: a footer or foundation plan with the size, depth and location of every post hole; a floor plan with header sizes; a cross section showing post embedment, post height to the truss bottom chord, headers and carriers anchored with at least two 1/2-inch through-bolts, girt sizes and spacing, and engineered truss and purlin spacing; and elevations. Unless a Delaware architect or engineer designs them, footings for poles up to 12 feet need at least 36 inches to the bottom of the footer, taller poles need the pole height divided by 4, and poles over 16 feet, or a second story outside the trusses, need sealed plans.

Post holes must be at least three times larger than the post on all sides, and footing inspections happen before concrete is placed. A pole building then needs a header inspection before any exterior or interior wall covering goes on, and Delaware-sealed truss specifications must be on site at the framing inspection. The County has enforced the 2021 IRC and 2021 IBC (County Code Chapter 52) since January 1, 2023. Plans submitted after April 10, 2026 must be designed to the 2024 IECC with a REScheck or COMcheck report, and the County will require the 2024 IECC for new homes, conditioned residential additions and accessory structures, and commercial buildings from April 11, 2027.

If the work disturbs 5,000 square feet or more, a single-family home site included, the Delaware Sediment and Stormwater Regulations call for a Sediment and Erosion Control Plan, and in Sussex the Sussex Conservation District’s Residential Standard Plan (23818 Shortly Road, Georgetown, (302) 856-2105) is required before the County permit is issued. Farm buildings are treated differently but not exempt: the County still requires a permit for agricultural buildings, and farm buildings need only a final zoning inspection rather than building-code inspections. We confirm with the County how your building will be classified before we file.