# How do I know where my property line is before building a fence? > How to find your property line before building a fence near Oxnard, when a survey is worth it, and what to do if a neighbor's fence is on your land. URL: https://ranchooxnardfence.com/guide/fence-property-line-survey/ Your property line comes from survey monuments, recorded maps and a licensed land surveyor, not from an old fence. If the corners are marked and both neighbors agree, you can build from them. If the line is in doubt, a surveyor sets it first, because moving a finished fence costs more than a survey. Not sure where your property line is? At [Rancho Oxnard Fence](https://ranchooxnardfence.com/) we confirm the line before every new fence and replacement around Oxnard and west Ventura County. Here’s where the line actually comes from, when a survey is worth paying for, and how to avoid a dispute. It’s general information, not legal or surveying advice. Key takeaways - An old fence is not proof of the property line. - Survey monuments and recorded maps define the line. - Ventura County treats line disputes as a civil matter. - Building a few inches inside your own line avoids most disputes. - DigAlert marks utilities, not property lines. ## Why the old fence is not the line Fences move over the years. They get rebuilt in a slightly different place, follow an old garden bed, or were set by eye in the first place. A replacement that copies the old line copies its mistake. That is why a new fence starts from corners, not from the old fence. ## Where the line comes from ### Survey monuments Most lots were marked with monuments at their corners when they were subdivided: pipes, pins or markers set in the ground, sometimes with a cap or tag. They may be buried under soil or paving, or missing. ### Recorded maps Subdivision maps and records of survey show the lot’s dimensions and how it relates to the monuments. Ventura County keeps recorded survey maps. ### A licensed surveyor A licensed land surveyor reads the records, finds existing monuments, sets missing ones, and stakes the line. Their work is what settles a disagreement. ## When a survey is worth it | Situation | Survey? | | --- | --- | | Corners are clearly marked and both neighbors agree | Usually not needed | | No markers can be found | Worth it | | A neighbor disagrees about the line | Worth it, before building | | The fence runs along a long, irregular or sloped boundary | Often worth it | | A wall, pool or driveway sits close to the line | Worth it | A survey costs money; moving a finished fence, or a dispute, costs more. Not sure where your line is? The site visit looks for corner markers and says whether a survey makes sense first. (805) 909-4556 ## What a survey visit involves A surveyor starts with the records: the subdivision map, earlier records of survey and the deed. On site, they search for existing monuments at the corners, measure between them and compare the measurements with the records. Missing corners are reset, and the line between them is staked so a fence can be laid out from it. Ask for the stakes to be set along the run you plan to fence, not only at the corners, and keep the survey with your house papers for the next fence. ## On the line or inside it ### On the line A fence on the boundary is shared. California Civil Code 841 presumes both owners benefit and share reasonable costs, with 30 days’ written notice before work. Agree on the line, the style and the finished side in writing. See the [good neighbor fence law guide](https://ranchooxnardfence.com/guide/good-neighbor-fence-law-california/). ### Inside your line Setting the fence a few inches inside your own property makes it entirely yours. You choose the style and pay the cost. The strip outside it is still yours to maintain. ## If a neighbor disagrees Ventura County treats property line disputes as a civil matter between owners. In practice: - Get the line surveyed and staked - Share the survey with the neighbor - Put any agreement in writing - Seek legal advice if it cannot be agreed Building first and arguing later is the expensive order. ## Utility marks are not boundaries Before any digging, California law requires DigAlert notice at least two working days, and no more than 14 calendar days, before excavation. Utility owners then mark their lines. Those paint marks show buried pipes and cables, not property lines. ## Height depends on where the fence sits Once the line is known, the height allowed depends on where each run sits on the lot: front yards are limited more than side and rear yards. See the [Oxnard fence rules guide](https://ranchooxnardfence.com/guide/oxnard-fence-rules-permits/). ## Putting it into the plan A new fence starts with confirmed corners, then the rules for each run, then utilities, then the build. See [how long installation takes](https://ranchooxnardfence.com/guide/fence-installation-timeline/), the [Oxnard fence cost guide](https://ranchooxnardfence.com/guide/fence-cost-oxnard/) and [fence installation](https://ranchooxnardfence.com/fence-installation/). Call if you want the corners checked on the estimate visit. ## Three more questions ### Does an old fence prove where the property line is? No. Fences drift, get rebuilt by guesswork or were never on the line. The line comes from survey monuments, recorded maps and a licensed surveyor's work. ### Can I build a fence right on the property line? You can build on the line with your neighbor's agreement, and then it is a shared fence under Civil Code 841. Without agreement, building a few inches inside your own line keeps the fence entirely yours. ### My neighbor's fence is on my side. What can I do? Confirm the line first with a survey. If the fence is on your land, talk with your neighbor and put any agreement in writing. Disputes are civil matters, so legal advice may be needed. This guide is not legal advice. Want this checked for your property? A site visit settles the line, the height rule at your address and the posts the fence needs. (805) 909-4556 ## Related service Fence installation New fences laid out from verified corners and set on footings sized for sandy ground, a high winter water table and wind. ## More guides Learn Who pays for a fence between neighbors in California? Civil Code 841 presumes neighbors share a boundary fence. Here is what that means for cost, notice, upgrades and disputes around Oxnard. Learn What are the fence rules and permits in Oxnard? Building permits, height limits, county areas, the coastal zone, fire zones, utility marks and shared fences, in the order a fence plan meets them. Cost Guide How much does a fence cost in Oxnard? Our typical ranges per linear foot, what each part of the price pays for, and the Oxnard conditions that move your number. Learn How long does it take to install a fence? Most backyard fences take one to three days on site. Here is the full timeline, and what adds days before and during the build. Learn How deep should fence posts go in sandy soil? Oxnard's sand and shallow winter groundwater change how posts are set. Here is what a footing has to do, and why depth is set at the site, not from a chart.