Under Hawaii encroachment law, a very small intrusion across a property line is legally ignored, a larger one can be ordered removed or converted into a paid easement, and an encroachment left unchallenged for 20 years can mature into an ownership claim. There is no single encroachment code. The rules come from Chapter 669 of the Hawaii Revised Statutes, the adverse possession statutes in Chapter 657, the seller disclosure law in Chapter 508D, and court decisions that fill in the gaps.
When a Structure Counts as an Encroachment
An encroachment exists when a physical improvement on one parcel crosses the legal boundary and sits on an adjacent parcel. Fences, retaining walls, building overhangs, driveways, and tree root systems can all qualify.
Proving one requires boundary evidence a court will accept. A licensed land surveyor compares the recorded property description and title documents against conditions on the ground and marks the actual line. Hawaii courts expect the party claiming encroachment to show clearly where the boundary runs, and surveyor testimony carries significant weight. Without a current survey, the dispute usually stalls at the question of whose version of the line is right.
If you believe a neighbor is asserting an adverse claim to your land, Chapter 669 gives you a quiet title action to have a court sort out the competing interests. That is the primary litigation vehicle when private negotiation fails.
The De Minimis Thresholds
Hawaii law treats very small boundary discrepancies as not encroachments at all. HRS §669-11 defines “de minimis structure position discrepancies” by property type:
- Commercial, industrial, and multi-unit residential property: 0.25 feet (3 inches)
- All other residential property: 0.5 feet (6 inches)
- Agricultural and rural property: 0.75 feet (9 inches)
- Conservation property: 1.5 feet (18 inches)
The measurement is the gap between where the improvement was built along what the owner reasonably believed to be the boundary and where the actual boundary turns out to be. A fence sitting four inches past the line on a residential lot falls within the threshold.1Justia. Hawaii Revised Statutes Title 36, Chapter 669, Section 669-11 – De Minimis Structure Position Discrepancies, Defined
Under HRS §669-12, a discrepancy within these numbers is not an encroachment, cannot support a zoning violation, and cannot be the basis for an adverse possession claim. The owner who built the improvement remains responsible for maintaining whatever sits in the discrepancy zone.2Justia. Hawaii Revised Statutes Title 36, Chapter 669, Section 669-12 – Consequences
Two limits matter. The de minimis protections do not apply to public lands or to shoreline boundaries. Where county-owned land is involved, the owner who built the encroaching improvement must remove it at their own expense when notified, following the county’s procedures.
Remedies When the Encroachment Is Larger
Once an intrusion exceeds the de minimis thresholds, courts have several tools. Which one applies depends on how serious the encroachment is, whether it was intentional, and the relative hardship on each side.
Mandatory Removal
The default remedy for a substantial, intentional, or meaningfully harmful encroachment is a court order to remove it. The encroaching party pays the full cost of taking the structure down and relocating it. The file puts typical costs at a few thousand dollars for a fence and tens of thousands for a building foundation or retaining wall. The court can also award damages for lost property value or impaired use during the encroachment.
Equitable Easement
Hawaii courts sometimes let an encroachment stay when ordering removal would be disproportionately harsh compared to the actual harm. The encroaching party typically pays compensation, and the court effectively adjusts the property rights rather than requiring physical correction. This tends to come up where the encroachment exceeds de minimis but is still minor, was built in good faith based on an honest belief about the boundary, and would cost far more to remove than the harm it causes.
Damages
Whether or not removal is ordered, the encroaching party can be liable for money damages. Those typically cover the diminished value of the affected property during the encroachment period, lost rental income or impaired use, and the surveys and legal fees the neighbor had to spend to establish the encroachment. Courts calculate from the facts rather than a formula.
The 20-Year Clock on Unchallenged Encroachments
Time matters. An encroachment left alone long enough can ripen into permanent ownership through adverse possession. Hawaii’s statutory period is 20 years of continuous, open, exclusive, and hostile possession before the original owner loses the right to recover the land.3Justia. Hawaii Revised Statutes Title 36, Chapter 657, Section 657-31 – Twenty Years
Hawaii also narrows who can win such a claim. Under HRS §657-31.5, a person can only claim adverse possession of real property that is five acres or less, and only if they have not asserted a similar claim in good faith within the past 20 years.4Justia. Hawaii Revised Statutes Title 36, Chapter 657, Section 657-31.5 – Adverse Possession
The de minimis rules close one door entirely. Because HRS §669-12 says a de minimis discrepancy cannot support an adverse possession claim, small encroachments inside the measurement thresholds will never mature into ownership no matter how long they sit.2Justia. Hawaii Revised Statutes Title 36, Chapter 669, Section 669-12 – Consequences
A related concept, prescriptive easement, grants a right to continue a specific use of a neighbor’s land rather than title to it. Hawaii courts generally look for the same open, continuous, and adverse elements.
Resolving a Dispute Before and During Court
Most encroachment problems get solved before a lawsuit is filed. An informal conversation with a recent survey in hand resolves many minor boundary disagreements. When that is not enough, two structured paths exist short of trial.
Mediation
The Hawaii Judiciary operates the Center for Alternative Dispute Resolution and manages contracts with community mediation centers statewide. Mediation is faster and cheaper than litigation, and agreements the parties built themselves tend to hold.5Hawaii State Judiciary. Alternative Dispute Resolution
Encroachment Agreements
When neighbors agree an encroachment can stay under certain conditions, a written encroachment agreement locks the arrangement in. A workable agreement identifies the exact nature and location of the encroachment, references a survey, specifies any compensation, assigns maintenance responsibility, and states what happens if the improvement is later removed or rebuilt. Both parties should record it with the Bureau of Conveyances so it binds future owners of both properties.
Litigation
If negotiation fails, the dispute moves to court, usually as a quiet title action under Chapter 669 or as a trespass and injunction claim. Each side presents survey evidence and surveyor testimony, and a judge decides the outcome. The court can order removal, grant an equitable easement, award damages, or adjust the boundary. These cases often take a year or more and can cost tens of thousands of dollars in attorney fees and expert charges.
Effect on Buying or Selling the Property
An unresolved encroachment can stall a sale. Buyers and lenders generally will not move forward when a survey shows a neighbor’s structure crossing the line or the home itself encroaching on adjacent land.
Hawaii’s seller disclosure law under HRS Chapter 508D requires sellers to disclose material facts about the property’s condition, and known boundary disputes and encroachments fall within that duty. Failing to disclose a known encroachment can expose a seller to claims for fraudulent or negligent misrepresentation after closing, potentially including rescission of the sale.
A standard owner’s title insurance policy typically covers the insured if they are forced to remove a structure because it encroaches on a neighbor’s land, or if a buyer or lender refuses to close because of a neighboring structure’s encroachment onto the insured property. Coverage and deductibles vary by policy, so the specific terms matter.
If you are listing or buying, order an updated boundary survey early. Catching an encroachment while there is still time to negotiate removal, an agreement, or a price adjustment is cheaper than discovering it at closing.
What It Costs
- A licensed land surveyor’s fee for a residential boundary survey typically runs from a few hundred dollars for a simple lot to several thousand for larger or more complex properties. Steep terrain, dense vegetation, and older subdivisions with unclear monuments push the price higher.
- Real estate attorney hourly rates vary with experience and case complexity. A dispute that reaches trial can carry total legal costs well into five figures.
- Recording an encroachment agreement or boundary line adjustment with the Bureau of Conveyances involves government fees that depend on document length and complexity.
- If a court orders removal, the encroaching party pays for demolition and any necessary restoration. A fence relocation might run a few hundred dollars; moving a concrete wall or building foundation can cost far more.
Mediation through the Judiciary’s community mediation centers generally costs less than private mediation and far less than litigation, which is why most practitioners push for a negotiated outcome before anyone files.