Delaware Fence Permit Rules: What Homeowners Need to Know

Delaware's Three-County Approach to Fence Rules

Delaware is the second-smallest state in the country, with just three counties — New Castle, Kent, and Sussex. Fence rules in Delaware are a combination of state-level statutes that apply everywhere and county or municipal ordinances that fill in the details on permits, height limits, and materials.

The state-level fence law (Delaware Code Title 25, Chapter 13) is one of the oldest in the country, with provisions dating to the 1852 code. It defines what constitutes a lawful fence, establishes the fence viewer dispute-resolution system, restricts barbed wire, and sets cost-sharing rules for partition fences. Local building codes — adopted at the county and municipal level, typically based on the ICC codes — govern the permit and inspection process.

For most homeowners, the practical takeaway is this: standard residential fences under 6 feet generally don't need a building permit in Delaware, but local zoning rules on height, setback, and materials still apply. Pool fences and daycare fences always require permits.

For a broader look at how fence permit rules work across the country, see our national guide to fence permits.

How Each County Handles Fence Permits

Because Delaware has only three counties, the permit landscape is simpler than in most states. Each county has its own building department and zoning code, and the incorporated cities within each county may have additional rules.

New Castle County

New Castle County — home to Wilmington, Newark, and Middletown — is the most urban and densely populated county in Delaware. The county generally exempts fences under 6 feet from building permits, consistent with the IRC exemption. Residential fences may not exceed 6 feet in most zoning districts. Front-yard fences are typically limited to 3–4 feet and may need to be at least partially open.

Wilmington, as an incorporated city, has its own building department and zoning code. Fence rules within city limits may differ from unincorporated New Castle County. Newark — home to the University of Delaware — similarly has its own zoning ordinance. Both cities generally follow the 6-foot exemption but have district-specific front-yard and corner-lot restrictions.

The state lawful fence standard for New Castle County is 4.5 feet — this is the minimum height for a fence to qualify as a lawful partition fence under state law, not the maximum allowed.

Kent County

Kent County, which includes the state capital Dover, is more rural than New Castle County and has a somewhat more relaxed building environment. Fences under 6 feet generally don't require a building permit unless they enclose a pool or daycare facility. Height limits follow the standard pattern: 4 feet in front yards, 6 feet in side and rear yards.

Kent County's building department (Levy Court Inspection & Enforcement) handles permits for unincorporated areas. Dover and other incorporated towns have their own building departments. The state lawful fence standard for Kent County matches New Castle County at 4.5 feet.

Sussex County

Sussex County — the largest county by area and the most rural — covers the southern third of the state, including beach communities like Rehoboth Beach and Lewes as well as agricultural areas around Seaford and Georgetown. Sussex County allows residential fences up to 7 feet on back and side lot lines, making it the most permissive county in the state.

The state lawful fence standard for Sussex County is only 4 feet — lower than the other two counties — reflecting the agricultural character of the region when the law was written. Sussex County's building code office handles permits for unincorporated areas and for 14 incorporated towns that have delegated building code enforcement to the county.

State-Level Fence Rules That Apply Everywhere

Delaware has several fence provisions that apply statewide, regardless of which county you're in.

Barbed Wire Restrictions

Delaware's barbed wire restriction is one of the most specific in the mid-Atlantic. Under Title 25, § 1301:

• Barbed wire cannot be used for division fences (boundary fences) unless both property owners consent
• No fence containing barbed wire, razor wire, or similar materials is permitted in any residential district without prior approval from the county or municipal zoning board
• The only exception is for properties used for farming or educational purposes

This means a typical suburban homeowner cannot install barbed wire on their fence without going through a formal approval process — and even then, approval is at the zoning board's discretion.

The Fence Viewer System

Delaware's fence viewer system, like Rhode Island's and Arkansas's, provides a structured way to resolve boundary fence disputes without going to court. The Superior Court annually appoints 5–8 fence viewers per hundred (an old colonial subdivision of counties that Delaware still uses for this purpose).

Fence viewers are the sole judges of: - Whether a fence is sufficient - How construction and repair costs should be split for partition fences - Damages from trespassing animals

Any three viewers can act on a dispute, with a majority deciding. The chair records settlement terms, and viewers are compensated at the statutory rate of $8 per day plus mileage — a rate that clearly hasn't been updated in a long time. Despite the modest compensation, the system remains on the books and provides a practical alternative to litigation for boundary fence disagreements.

Partition Fence Obligations

Delaware law requires adjacent property owners to maintain partition fences in equal shares as long as both parties continue to use their land. When someone encloses land that makes an existing fence into a shared boundary, the fence viewers determine what compensation is owed for the fence that's now shared.

This obligation is rooted in agricultural fence law, and most disputes that actually reach the fence viewer system involve rural properties. For suburban and urban homeowners, the practical advice is the same as in most states: if you're building on the property line and want to share costs, get a written agreement first.

Height Limits Across Delaware

The general pattern across all three counties:

• Front-yard fences: 3–4 feet in most residential districts, often required to be at least partially open
• Side-yard and rear-yard fences: 6 feet in New Castle and Kent counties; up to 7 feet in Sussex County
• Corner lots: Additional restrictions, often limiting the street-facing side to 3 feet for driver visibility
• Sloped ground: Some jurisdictions allow additional height to account for grade changes, potentially up to 7 feet total

These limits can be overridden by deed restrictions, subdivision covenants, or HOA rules. Many newer subdivisions in Middletown, Bear, and other fast-growing New Castle County communities have HOA standards that are more restrictive than county code.

Pool Fence Requirements

Delaware does not have a comprehensive statewide residential pool fence law. Pool barrier requirements are set at the local level, with most jurisdictions following the IRC baseline:

• Barrier at least 48 inches tall
• Self-closing, self-latching gates opening away from the pool
• No gaps larger than 4 inches
• No more than 4 inches between the ground and the bottom of the barrier

Pool fences always require a building permit, even in jurisdictions where standard fences are exempt. Kent County specifically calls out pool and daycare fences as requiring permits regardless of height. New Castle and Sussex counties follow similar rules.

Material Restrictions

Beyond the statewide barbed wire restriction, material rules are set locally.

Most Delaware jurisdictions allow standard residential fencing materials: wood, vinyl, aluminum, wrought iron, chain link, and composite. Chain link is generally permitted in side and rear yards but may be restricted or discouraged in front yards in some zoning districts.

Electrified fences are not explicitly addressed by state law but are typically prohibited in residential zones by local ordinance.

All residential fences must be constructed of materials specifically designed for fencing — improvised barriers made from sheet metal, plywood, or salvaged materials are prohibited in most jurisdictions.

Front-yard fences in many Delaware communities must use open designs — picket, wrought iron, or split rail — rather than solid privacy fencing. The finished or decorative side typically faces the street.

Setbacks, Easements, and Corner Lots

Delaware cities and counties enforce standard placement rules for fences.

Setbacks from the property line vary by jurisdiction. Some areas allow fences directly on the property line; others require a 2-inch to 3-foot setback. Front-yard setbacks tend to be larger — 10–25 feet from the front property line in some districts — to maintain the streetscape.

Easements restrict fence placement statewide. You cannot build within a recorded utility easement without permission. Delaware's older communities — particularly in Wilmington and Dover — often have easements that predate modern development and may not be obvious on the ground.

Corner lots face visibility triangle requirements in every jurisdiction. Fences near intersections must stay low — typically 3 feet or less — within a defined distance of the corner.

HOA Landscape in Delaware

Delaware has a significant concentration of HOA-governed communities, particularly in New Castle County's fast-growing corridor south of Wilmington — Middletown, Bear, and the surrounding area. These subdivisions have seen explosive growth over the past two decades, and nearly all new developments come with HOA covenants.

Delaware does not have a state law limiting HOA authority over fences. Your HOA can restrict materials, colors, heights, and styles, and can require architectural review before construction. Get your HOA's written approval before building.

Consequences of Skipping the Permit

For most standard residential fences in Delaware, the risk isn't a missing building permit — it's a zoning violation. If your fence exceeds height limits, violates setback requirements, or uses prohibited materials, the local code enforcement office can issue a violation and require modification or removal.

Fences around pools or daycares that are built without a permit face stricter consequences, since those permits are tied to safety inspections.

Permit fees in Delaware are generally modest for standard residential fences. The cost of a permit is almost always less than the cost of dealing with a code violation after the fact.

For an overview of all building permit requirements in Delaware — including decks, sheds, pools, and more — see our complete Delaware building permit guide.

If you're also planning a deck or retaining wall alongside your fence, each project has its own permit requirements. Planning your outdoor projects together can help ensure everything complies with your county's setback and zoning rules.