Do you need a survey to buy a house?

No US state legally requires a survey to buy a house. In practice, most buyers end up with one anyway, because the lender asks for it or the title insurer will not cover boundary problems without it. The survey costs $400 to $1,000 for a typical residential lot, the buyer usually pays, and it is the single cheapest way to find out that the garage is two feet over the line before you own the garage.

The confusion comes from the fact that three different parties want three different things, and only one of them is talking to you.

What the lender wants

Lenders care about collateral. They want to know that the house they are lending against actually sits on the parcel described in the loan documents, that no part of it hangs over a setback or an easement, and that no neighbor has a claim to a slice of it. On conventional residential loans many lenders will accept a title policy with the standard survey exception intact and never ask you for a survey at all. On new construction, rural acreage, unusual lots or anything commercial, they ask.

What the title company wants (this is the part people miss)

Every standard title policy comes with an exception for matters a survey would disclose: encroachments, boundary overlaps, easements, shortages in area. Translated: if it turns out your neighbor's driveway crosses your line, your title policy does not cover you, because the policy explicitly excluded that whole category of problem.

To remove or amend that exception, the title company needs an acceptable survey. That is the actual reason a survey shows up on your closing checklist. It is not the state, and often it is not even the lender. It is the insurer declining to insure something nobody has looked at.

In Texas the mechanism has a name and a form. The buyer can either pay for a new boundary survey, or use the seller's existing survey together with a signed T-47 affidavit in which the seller swears nothing has changed since it was made: no new pool, no moved fence, no addition. If the title company accepts that pair, you save several hundred dollars. Details on the Texas land surveyors page.

What a survey costs, and who pays

The buyer normally pays, because the survey protects the buyer and satisfies the buyer's lender. Local custom varies, and in several states (Alaska, Illinois, Kansas, Missouri and Nebraska are the ones usually cited) the seller customarily provides one. It is negotiable like anything else in the contract, and it is worth asking for during the option or inspection period rather than three days before closing, when rush fees start.

The mortgage survey is not a boundary survey

This trips up a lot of buyers. A mortgage or location survey answers a narrow question for the lender: are the improvements inside the lines and clear of the easements. It typically does not set or recover corner monuments, and it is usually certified only to the lender and title company, not to you. It is not the document you use to build a fence a year later.

If you already know you want to fence the yard, add a deck or settle a question about that hedge, pay the small difference and order a full property line survey instead. You are hiring the crew anyway. Getting the corners set while they are on site is far cheaper than bringing them back.

When you should absolutely get one, no matter what the lender says

• The lot is irregular, on a corner, on a curve, or backs onto a right-of-way or easement.
• There is a fence, wall, shed, driveway or hedge near a line. Existing improvements near lines are where encroachments hide, and you inherit them at closing.
• Rural acreage or an unplatted parcel. The legal description may never have been reconciled against the ground.
• New construction. You want the as-built and the setbacks confirmed before you accept the house.
• The title commitment lists an easement, encroachment or survey exception you do not understand. Ask the surveyor, not the internet.
• You plan to build anything within the first few years. You will pay for a survey eventually. Paying now is cheaper and better timed.

How to fit it into the closing timeline

Order the survey as soon as you are under contract, not after the appraisal comes back. Field work is usually half a day, but records research and drafting mean 5 to 10 business days total, and in a busy season in a busy metro it stretches. Rush fees on a survey are avoidable and pure waste.

While you are assembling the file, this is also the moment to get the rest of your underwriting paperwork clean. Lenders want two to three months of statements, and it is much faster to convert those PDF statements into a tidy spreadsheet than to have an underwriter query line items they cannot read. Surveys and statements are the two things that most often stall a closing in the final week.

The bottom line

You do not legally need a survey to buy a house. You practically need one if you want your title policy to actually cover boundary problems, if your lender asks, or if you intend to touch the yard after you move in. On a $400,000 purchase, spending $600 to learn that the fence is on the wrong side is not a cost. It is the cheapest due diligence in the entire transaction.

Compare up to 3 quotes from license-verified, insured surveyors covering your county. It is free for buyers, and quotes usually come back within 24 hours.