What Delaware Law Says About Fences
Delaware does not have a statute that requires a property survey before you build a fence. However, state law has quite a bit to say about what happens when neighbors disagree about a fence. Delaware Code Title 25, Sections 501 through 503 governs partition fences, the fences that run along the boundary between two adjoining properties, and sets out the rights and obligations of neighboring landowners.
Under this framework, adjoining owners share the responsibility for building and maintaining a partition fence. Section 502 provides that the cost is split equally unless the owners reach a different agreement. The law also establishes the role of fence viewers, local officials who can be called upon by either party to inspect a fence dispute, determine the location of the boundary, and order each owner to maintain their respective section.
The problem is that fence viewers are not licensed surveyors. Their determinations can be challenged, and without a professional boundary survey, the underlying question of exactly where the property line runs remains open. A stamped survey by a Delaware Professional Land Surveyor (PLS) settles that question permanently.
The Real Risk: Building in the Wrong Place
Most fence disputes in Delaware do not involve neighbors who are clearly encroaching by many feet. They involve situations where both owners believe, in good faith, that their fence plan is correct, but neither has actually confirmed the property line with a survey. The line in the deed description and the line on the ground often do not match what either owner assumes.
Delaware has a long history of metes-and-bounds property descriptions, particularly in New Castle County, where William Penn-era grants from the 1680s form the foundation of many deed chains. These older descriptions reference iron pins set decades ago, stone markers, fences, and even tree stumps that may no longer exist. In Sussex County, resort subdivision lots are often narrow and densely developed, with setback requirements layered on top of property lines. In either setting, assuming you know where the line falls without a professional survey is a gamble.
If you install a fence and later discover it crosses your neighbor’s property line by even a foot or two, you may be required to move it at your own expense. The cost of removal, repositioning, and any damages your neighbor claims can quickly exceed what a boundary survey would have cost in the first place.
When a Survey Makes Clear Sense
You do not always need a survey before building a fence. If your fence will run well inside your lot, with several feet of buffer from any boundary on all sides, and your property is in a newer subdivision with clearly marked monuments, the risk is lower. But a survey is strongly worth considering in these situations:
- Your planned fence line runs within a few feet of the property line on any side
- The property is in an older area of Wilmington, Newark, or Dover where original monuments may have been disturbed or removed
- You are in a Sussex County resort community with narrow lots and close neighbor spacing
- You cannot locate the iron pins or other monuments that mark your corners
- There is any history of disagreement with an adjoining neighbor about where the line runs
- Your neighbor has raised objections or expressed concern about your fence plans
A boundary survey on a typical Delaware residential lot runs $550 to $900. That is a fixed, predictable cost. A fence dispute that escalates to fence viewers, attorneys, or a court proceeding is none of those things.
Permit Requirements Across Delaware
Even setting aside property line questions, most Delaware municipalities require a building permit before you install a fence above a certain height. The threshold varies by jurisdiction, but six feet is a common cutoff. Below that height, some municipalities allow fence installation without a permit; above it, a permit is required.
Wilmington
Wilmington requires a building permit for fences over six feet in height. The permit application typically requires a site plan showing the proposed fence location on the lot. While the city does not mandate a licensed survey for this purpose, the site plan must accurately depict the property boundaries. If your measurements are off and the fence is later found to violate setback rules, the permit does not protect you from an enforcement action.
Dover
Dover also requires permits for fences exceeding six feet. Residential fences in most Dover zoning districts must comply with setback requirements from the property line, meaning a fence cannot be placed directly on the boundary in all locations. Confirming the actual line before you apply for a permit avoids a situation where you submit plans that cannot be approved without revision.
Sussex County Municipalities
Rehoboth Beach, Dewey Beach, Bethany Beach, and Lewes each have their own ordinances. Resort towns in Sussex tend to have strict rules about fence height, materials, and placement, partly because lots are small and partly because coastal aesthetics matter to local governance. Many of these towns require that fences be set back from the property line rather than placed directly on it, which means knowing where the line falls is essential before you order materials or schedule installation.
How the Fence Viewer Process Works
If you and your neighbor cannot agree on a fence or a shared boundary, either of you can invoke Delaware’s fence viewer process under Title 25. Fence viewers are appointed by local government and have the authority to inspect the disputed fence or boundary area, hear from both parties, and issue a determination about each owner’s obligations.
The process sounds straightforward, but it has limits. Fence viewers are not professional surveyors. Their visual inspection of a disputed line, without a stamped survey to rely on, leaves room for continued disagreement. If one party believes the fence viewer got the line wrong, the dispute can escalate further. A boundary survey conducted by a licensed Delaware PLS before the fence viewer process begins gives the viewers something concrete to work from and often resolves the dispute before any formal proceeding is needed.
Tidal and Wetland Considerations in Sussex County
Sussex County property owners near the Atlantic coast, Rehoboth Bay, Indian River Bay, or any tidal tributary face an additional layer of complexity. Tidal boundaries, the mean high water line, can shift over time with storms and sediment movement. If your property abuts tidal water, a fence placed at what you believe to be your property line may actually fall on state-owned tidal lands, which carry their own regulatory restrictions under DNREC rules.
A Delaware PLS with experience in Sussex County coastal work knows how to research tidal boundaries and flag properties where the upland-to-tidal transition is unclear. This is not a situation where a homeowner measuring from a deed description can reliably determine where a fence may lawfully be placed.
Getting a Survey Before You Build
The most straightforward path for any Delaware property owner who is uncertain about the property line is to hire a licensed PLS before committing to a fence design or location. The surveyor will research the deed chain at the relevant county Recorder of Deeds, locate or set monuments in the field, and produce a stamped plat showing exactly where the boundaries run. With that document in hand, you can design your fence with confidence, share the information with your neighbor, and satisfy any permit application requirements that ask for accurate boundary information.
Every surveyor in our Delaware directory is sourced from state licensing records. Find a licensed Delaware Professional Land Surveyor near you at findlandsurveyor.com/delaware and get the information you need before the first post goes in the ground.