You are not always legally required to get a land survey before buying property, but it is strongly recommended. A survey reveals boundary lines, encroachments, and easements that a title search cannot detect. Skipping one can lead to expensive legal problems after the sale closes.

Most homebuyers spend months focused on inspections, appraisals, and mortgage paperwork. A land survey is rarely the first thing anyone brings up. Buyers often assume that title insurance covers everything, or that the seller’s word on lot lines is good enough.

Neither assumption is safe. This article explains when a survey is required, what it uncovers that other reports miss, and how to make sure you are fully protected before you sign.

Is a Survey Legally Required When Buying a Home?

A land survey is not legally required in every home purchase, but many mortgage lenders require one before approving a loan. Requirements vary by state, lender, and property type. Cash buyers face no legal obligation, but skipping a survey leaves them exposed to risks they cannot see.

Whether you need a survey depends on a few specific factors.

If you are financing with a mortgage, your lender may require a survey or a mortgage location certificate before closing. This is especially common for rural land, properties with recent additions, or lots with unusual shapes. Ask your lender early in the process so the requirement does not catch you off guard during the final week before closing.

If you are paying cash, no one can require you to order a survey. But cash buyers carry the same property risks as financed buyers, without a lender review process to flag problems first. That makes independent due diligence even more important.

If an existing survey is on file, your lender may accept it, depending on its age and whether any changes have been made to the property since it was completed. A survey conducted before a fence, deck, or addition was built may not reflect current conditions on the ground.

What a Survey Reveals That a Title Search Will Not

A title search reviews legal ownership records. A land survey physically measures the property. Only a survey can detect encroachments, confirm the exact location of boundary lines, or reveal that a neighbor’s fence, driveway, or structure sits on land you are about to purchase.

Title insurance is useful, but it has clear limits. It protects against claims related to ownership history, such as liens or unresolved ownership disputes. It does not show you where the physical edges of your property actually are. According to the American Land Title Association, standard title policies do not cover boundary disputes that a current survey would have revealed.

Here is what a survey can uncover that a title search cannot:

• Encroachments. A neighbor’s fence, shed, or driveway may cross into the property you are buying. Studies suggest encroachments affect roughly 11% of residential properties in the United States, making this one of the most common survey findings.
• Boundary discrepancies. The lot described in the legal deed may not match the lot as it exists on the ground. Older property descriptions are sometimes vague or contain measurement errors that have never been corrected.
• Easements. A utility company or neighboring property owner may hold a legal right to use part of your land. Easements appear on approximately 25% of residential deeds in the U.S., and many buyers are unaware of them at purchase. Depending on the easement, it can restrict where you build, what you plant, or who can access your land.
• Setback violations. A structure on the property may sit too close to the boundary line, violating local zoning requirements. This can affect your ability to get permits, renovate, or sell the home in the future.

Any one of these problems becomes your legal responsibility the moment you take ownership.

Real Situations Where Buyers Wished They Had a Survey

These are not rare edge cases. Licensed surveyors encounter them regularly.

The fence that was not on the property line. A buyer purchased a home with a fenced backyard and assumed the fence marked the boundary. After closing, the neighbor hired a surveyor and discovered the fence sat three feet inside the neighbor’s property. The new owner paid to have it relocated.

The addition was built without a permit. A home had a sunroom added by a previous owner. No permit was pulled and no survey was done at the time. The addition extended two feet past the legal property line onto land owned by the municipality. The buyer found out when applying for a renovation permit two years after closing.

The easement that changed the plan. A buyer purchased a rural lot with plans to build a guest cabin. A survey revealed a utility easement running across the center of the planned build site. The project had to be fully redesigned, adding cost and months of delay.

Boundary disputes found after closing typically cost between $5,000 and $25,000 to resolve, depending on whether legal action becomes necessary.

Boundary Survey vs. Mortgage Survey: Which One Do You Need?

For most home purchases, a boundary survey offers the strongest legal protection. It establishes exact property lines and produces a certified document you can use if a dispute arises. A mortgage survey meets lender requirements at a lower cost but does not carry the same legal weight.

A boundary survey physically locates and marks property corners, documents any encroachments or easements found, and produces a signed, sealed plat from a licensed surveyor. It is the document that holds up in court.

A mortgage location survey is a lower-cost option that satisfies many lender requirements. It shows the general position of structures on a lot but does not legally establish boundary lines. If you are buying in a dense neighborhood, on a waterfront lot, or on land with a complex ownership history, the added protection of a boundary survey is worth the difference in price.

How to Add a Survey to Your Purchase

Getting a survey before closing takes only a few straightforward steps.

1. Ask your agent early. Find out whether the listing includes a current survey and request a copy if one exists.
2. Confirm lender requirements. Ask your lender what type of survey is required and what specifications it must meet.
3. Hire a licensed surveyor. Your agent, lender, or title company can provide referrals. Confirm the surveyor holds an active license in the state where the property is located.
4. Schedule before the inspection deadline. If the survey reveals a serious issue, you need time to renegotiate terms or walk away from the purchase.
5. Review the findings before closing. Ask your surveyor to explain any flagged items so you fully understand what you are buying.

Frequently Asked Questions

Can I use the seller’s existing survey? 

Sometimes. If the survey is recent, completed by a licensed surveyor, and no changes have been made to the property since it was done, your lender may accept it. Always confirm with both your lender and title company before relying on it.

What if the survey finds a problem? 

You have several options. You can ask the seller to fix the issue before closing, request a price adjustment, or walk away if the problem is serious enough. Finding a problem before closing is always better and far less expensive than discovering it after you own the property.

Does title insurance cover boundary disputes? 

Standard title insurance does not cover boundary disputes that a current survey would have revealed. Some policies offer survey coverage as an add-on. Read your policy carefully and ask your title agent what is included before you close.