Planning to install a fence in California? While it might seem straightforward, building on or over a property line can result in costly removal, legal disputes, and damaged neighbor relationships. Here's what you need to know.
When You Definitely Need a Survey
You should strongly consider a boundary survey before building a fence if:
- You don't know where your property lines are – Assuming isn't worth the risk
- No visible boundary markers exist – Original survey monuments may be buried or destroyed
- You're replacing an old fence – The existing fence may not be on the property line
- Your neighbor disputes the boundary – A survey provides legal documentation
- Your lot has irregular shapes – Don't guess on complex boundaries
- You're building near easements – Utility or access easements may restrict placement
California Fence Laws You Should Know
Good Neighbor Fence Act (Civil Code 841)
California's fence law presumes that neighbors benefit equally from a boundary fence and should share costs equally. However, this applies to fences on the property line – not fences built entirely on your property.
Building on vs. Near the Property Line
You have two main options:
Option 1: Build on the property line
- Neighbor shares maintenance responsibility
- Neighbor may share cost under Civil Code 841
- Requires knowing the exact property line location
- May require neighbor agreement
Option 2: Build entirely on your property
- You own and maintain the entire fence
- No neighbor agreement needed
- Setback may be required (check local codes)
- Still need to know where the line is to stay clear of it
What Happens If You Build on a Neighbor's Property?
Building a fence that encroaches on your neighbor's property can lead to:
- Forced removal – You may have to tear down and rebuild the fence at your expense
- Adverse possession claims – Your neighbor could eventually claim the disputed land
- Legal action – Neighbors can sue for trespass and damages
- Title issues – Encroachments can complicate future property sales
- Damaged relationships – Boundary disputes often escalate and last years
The Survey Process for Fence Installation
Here's what to expect when getting a boundary survey for your fence project:
- Research: The surveyor reviews your deed, neighboring deeds, and recorded maps
- Field work: They locate existing monuments and measure your property
- Calculations: Boundary lines are computed based on legal descriptions
- Marking: Property corners are marked with stakes, flags, or monuments
- Documentation: You receive a map showing your exact property boundaries
Once complete, your fence contractor can confidently install the fence in the right location.
Can't I Just Use My Property Records?
Unfortunately, deeds and assessor maps don't give you the physical location of your property lines. They describe boundaries in legal terms that require professional surveying to translate to actual ground locations. Additionally:
- Online property maps are for tax purposes, not boundary determination
- Satellite imagery can be inaccurate by several feet
- Existing fences may not mark true boundaries
- Original survey monuments may be lost or disturbed
Bottom Line: Prevention Is Cheaper Than Correction
A boundary survey typically costs $600-$1,500 for a residential lot in the Bay Area. Removing and rebuilding a fence can cost $5,000-$15,000, not counting legal fees if disputes arise. The survey is always the smarter investment.