How do you find the property line before building a fence in California?

Fences in older Bay Area neighborhoods were often built by eye, by a previous owner, decades ago. Many sit a foot or two off the recorded line. A new fence built on the old fence's footprint repeats the error and makes it harder to fix later.

The recorded boundary comes from the legal description in the deed, the subdivision or parcel map filed with the county, and any Record of Survey on file. Those documents describe the line in bearings and distances from monuments: iron pipes, brass disks, or nails set in the ground, often buried. Finding those monuments and measuring from them is the survey.

Online parcel maps from the county assessor carry a disclaimer that they are not surveys. Their lines can be off by several feet. They show which parcel is which, not where the pin is.

California restricts boundary work to licensed professionals. Business and Professions Code § 8726 defines the practice of land surveying to include anyone who:

Locates, relocates, establishes, reestablishes, or retraces any property line or boundary of any parcel of land, right-of-way, easement, or alignment of those lines or boundaries.

Setting or replacing a boundary monument is also restricted, under § 8726(a)(5). Two kinds of license carry this authority: a land surveyor's license, and a civil engineer's license issued before January 1, 1982, when civil engineers were still licensed to practice surveying. Section 8761 refers to both as persons "authorized to practice land surveying." A fence contractor cannot legally set a property corner.

A homeowner can make informal measurements for personal planning, but those measurements are not a substitute for a boundary determination by an authorized professional.

Licenses can be checked on the Board for Professional Engineers, Land Surveyors, and Geologists license lookup.

The scope varies by parcel. Ask the surveyor what the work will include: locating and identifying existing boundary monuments, re-establishing missing corners where appropriate, staking the fence line on the ground, and preparing any Record of Survey or Corner Record required by law. For a fence, the practical question is whether the line will be marked where the posts go.

If the survey finds that the line differs from what the recorded maps show, the surveyor is required by law to file a Record of Survey with the county. Under Bus. & Prof. Code § 8762(b), a filing is mandatory when the field work discloses a material discrepancy with recorded maps, or when the surveyor sets points not shown on any recorded map. Under § 8762(c), the filing is due within 90 days after boundary monuments are set or the field survey is completed, whichever comes first, with an extension procedure in § 8762(d) when delay is outside the surveyor's control. This public record protects the owner in any later dispute.

California law gives surveyors a statutory right of entry. Under Bus. & Prof. Code § 8774(a), a person legally authorized to practice land surveying may enter real property to investigate and use boundary evidence and to perform surveys, and the owner or tenant must provide reasonable access without undue delay. The statute states that prior notice is not a condition of entry, though the owner or tenant should be notified of the proposed time where practicable.

The right of entry upon or to real property to investigate and utilize boundary evidence, and to perform surveys, is a right of persons legally authorized to practice land surveying, and it is the responsibility of the owner or tenant who owns or controls property to provide reasonable access without undue delay.

This right belongs to the surveyor, not to the homeowner who hired them. It does not let the homeowner or the fence crew enter the neighbor's yard.

Published prices for boundary surveys in the Bay Area are rare, and most online price guides are not based on local quotes. The practical answer is to get two or three written quotes. What moves the price:

• Whether original monuments can be found or have to be re-established from distant control points.
• Lot size and the number of corners.
• Whether only one line is needed or the whole parcel.
• How complete the recorded maps are for that block.
• Whether a Record of Survey will need to be filed.

Re-staking one line from an existing recent survey is far less work than a first survey of a parcel with no record.

This is the result that starts most disputes. Record title controls ownership unless the neighbor establishes a recognized exception. The owner may seek removal of an encroachment, but an injunction requiring removal is not automatic; California courts may weigh the relative hardship of each side, described below. Five doctrines come into play, and they are often confused with each other.

1. Record title

The owner of record owns the strip. Everything below is an exception that the encroaching neighbor must prove, or a basis on which a court may decline to order removal.

2. Agreed boundary

Neighbors can fix a boundary by agreement when the true line is uncertain. The California Supreme Court set the limits in Bryant v. Blevins (1994) 9 Cal.4th 47. The doctrine requires uncertainty about the true line, an actual agreement between the owners to treat a marker as the boundary, and acceptance of that line for at least five years or long enough that moving it would cause substantial loss.

The key holding: the mere existence of a fence that both sides lived with is not an agreement. The neighbor claiming the fence as the boundary has to show that the owners at the time were uncertain and agreed to settle it there. Bryant declined to adopt a rule that the doctrine never applies when deeds and surveys can fix the line, but as a practical matter, courts have been reluctant to apply it where the legal description resolves the boundary and there is no evidence of an actual agreement.

3. Adverse possession

Adverse possession transfers ownership of the strip. It requires actual, open, and notorious occupation that is hostile to the owner's title, under a claim of right or color of title, continuous for five years, plus payment of all property taxes assessed on the land during those five years. Code of Civil Procedure § 325(b) requires the tax payments to be shown by certified tax collector records.

In an ordinary residential boundary dispute, the tax requirement is often fatal. When adjoining lots are separately assessed by lot number, the claimant ordinarily has not paid the taxes assessed on the neighbor's parcel or on the disputed portion of it. The Court of Appeal applied this reasoning in Harrison v. Welch (2004) 116 Cal.App.4th 1084.

4. Prescriptive easement

A prescriptive easement is a right to use land, not to own it. Civil Code § 1007 recognizes title by prescription after the period set in the Code of Civil Procedure, which is five years under § 321. The elements mirror adverse possession, except that payment of property taxes is generally not required unless the easement itself has been separately assessed; the California Supreme Court stated this in Gilardi v. Hallam (1981) 30 Cal.3d 317, 322. Because taxes usually drop out, this is the more common claim.

California courts have closed the obvious loophole. A fenced-off strip that the encroaching neighbor uses as part of their yard is exclusive use, which is ownership in all but name. Courts refuse to grant an "exclusive prescriptive easement" in ordinary residential boundary disputes. Silacci v. Abramson (1996) 45 Cal.App.4th 558 refused to let a neighbor use a fenced strip as his own backyard under that label, and Harrison v. Welch followed it, holding that a shed and landscaping that excluded the owner from the strip could not be a prescriptive easement because that would bypass the tax requirement of adverse possession.

An owner can also block prescriptive claims in advance. Civil Code § 1008 provides that no use ripens into a prescriptive easement if the owner posts signs reading "Right to pass by permission, and subject to control, of owner: Section 1008, Civil Code" at each entrance or every 200 feet along the boundary.

5. Relative hardship

Even when none of the above applies, a court may let an encroachment stay and award money damages instead of ordering removal. This is the relative hardship doctrine, applied in Hirshfield v. Schwartz (2001) 91 Cal.App.4th 749, where neighbors had built a koi pond, waterfall, and putting green on land they innocently believed was theirs because of a chain-link fence. The result is sometimes called an equitable easement.

Three things must all be shown: the encroaching neighbor acted innocently, not willfully or negligently; the owner will not suffer irreparable injury; and the hardship of removal to the encroacher is greatly disproportionate to the harm of leaving it. Doubtful cases go against the encroacher. A neighbor who builds after a survey has shown the line cannot claim innocence.

Replacing a fence on the same footprint, no survey. Both owners accept the old location. Nothing changes legally. The strip on the wrong side stays with the owner of record, and the new fence is still not the boundary. If either property sells, the next owner may order a survey and raise the issue.

Survey shows the old fence is 18 inches onto the neighbor's land. The neighbor can ask for the new fence to go on the true line. If the owners want an arrangement that will survive a later sale, they should determine whether a recorded easement, a recorded boundary agreement, a deed, or a formal lot line adjustment through the city is appropriate. A private agreement that is not properly structured and recorded may not bind future owners.

Neighbor claims they "own" the strip because the fence has been there 20 years. Twenty years of a fence, without more, does not meet Bryant. Adverse possession usually fails on taxes. An exclusive prescriptive easement is barred by Silacci and Harrison. The realistic question is whether the neighbor has improvements on the strip that would bring relative hardship into play.

Neighbor built a shed against the fence years ago. Removal may be ordered, or the court may allow it to stay with damages under Hirshfield. The neighbor's state of mind when building matters most. If they knew or should have known about the line, the relative hardship argument fails.

Owner wants to build a fence a few inches inside the line to avoid any dispute. Legal and common. The strip outside the fence is still the owner's land. Maintain it, and consider a § 1008 sign if the neighbor begins using it.

Can a fence contractor find the property line?
No. Locating a boundary is the practice of land surveying under Bus. & Prof. Code § 8726. A contractor can build to stakes an authorized surveyor set, but cannot set them.

Do I need a survey if I can find the corner pins myself?
Found pins are evidence, not proof. Pins get disturbed, and older subdivisions sometimes have pins set by different surveyors in slightly different places. A surveyor confirms which pins are the controlling monuments.

Does a boundary survey have to be recorded?
Only when it reveals a discrepancy with recorded maps or sets new points, under § 8762(b). When required, the surveyor must file within 90 days. A survey that simply confirms the recorded line does not have to be filed, but the surveyor may file it anyway.

My neighbor won't let the surveyor onto their land. What then?
Under Bus. & Prof. Code § 8774, a person authorized to practice land surveying has a statutory right of entry to investigate boundary evidence and perform surveys, and the owner or tenant must provide reasonable access without undue delay. Prior notice is not a condition of entry, though the surveyor should give notice of the proposed time where practicable. In practice, a residential line can often be located from monuments on the client's parcel and in the public right-of-way.

Does the Good Neighbor Fence Act decide where the fence goes?
No. Civil Code § 841 addresses who pays for a fence that divides two properties. Where that line is comes from the deed, the maps, and the survey. The cost-sharing rules are in the shared fence guide.

• Who pays for a shared fence
• Fence height limits by city
• When a fence needs a permit
• City fence rules

• Bus. & Prof. Code § 8726 (practice of land surveying). leginfo
• Bus. & Prof. Code § 8761 (persons authorized to practice land surveying). leginfo
• Bus. & Prof. Code § 8762 (Record of Survey filing). leginfo
• Bus. & Prof. Code § 8774 (right of entry). leginfo
• Civil Code § 1007 (title by prescription). leginfo
• Civil Code § 1008 (posted permission sign). leginfo
• Code Civ. Proc. § 321 (five-year period). leginfo
• Code Civ. Proc. § 325 (adverse possession, tax payment). leginfo
• Bryant v. Blevins (1994) 9 Cal.4th 47.
• Gilardi v. Hallam (1981) 30 Cal.3d 317.
• Silacci v. Abramson (1996) 45 Cal.App.4th 558.
• Harrison v. Welch (2004) 116 Cal.App.4th 1084.
• Hirshfield v. Schwartz (2001) 91 Cal.App.4th 749.

General information about California law, not legal advice. For a specific dispute, consult a California attorney.