How to Spot a Home-Contractor Scam

Most have integrity, but you have to rely on more than a handshake and your gut.

Couple standing in front of house while contractor points at something
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This is the season when the lawn mowers begin roaring, the mulch is spread and homeowners, if they haven't already, begin thinking about getting that roof fixed or finally putting up a privacy fence. But it isn't just the sun that comes out. There are also the pests—the ticks, the mosquitoes and the con artists.

As plenty of homeowners are aware, there are ample anecdotes in the media of home-contractor scams. These often con the elderly into either giving up money for no work done, or having work done but at an exorbitant price that wasn't agreed to. In the last few weeks alone, a 77-year-old man in the Philadelphia area paid for his roof to be repaired only to end up paying to have a useless, tar-like substance splattered across it; in Norfolk, Va., an 83-year-old woman gave a home contractor $4,300 and never saw him again; in San Diego, a con artist has been offering to fix driveways, collecting down payments as high as $2,500 and giving nothing in return.

The anecdotes go on and on. So what should you do if you want a project completed but don't want to see your name in the local paper, where you're quoted warning your neighbors not to fall for a scam?

Research your contractor. Everyone thinks they're doing that, but it isn't as straightforward as one might think to vet a home contractor.

[Read: Think Twice About Making These Home Renovations.]

"In many cases, we see a person posing as a licensed or reputable contractor, and all checks out until the first payment is made to begin the job, and then the subject disappears. We see fake business cards and websites being used, and criminals can assume the identity of a real contractor, register a company or use an alias. The goal is always the first payment," says Tom Burnett, a spokesman for Wymoo International, a worldwide detective agency headquartered in Jacksonville, Fla. Burnett is also a former private eye.

Despite all the tricks a con artist can play, you can vet a contractor, says Burnett. Obviously, there's the tried-and-true method of using a contractor that a friend or family member swears by, but if you don't have that avenue, Burnett suggests:

• Contact the Better Business Bureau where the company or contractor operates and check for complaints.

• Ask for references and make sure you actually contact, say, two of them.

• Check to see if the company is registered with its state or your state's division of corporations.

• You can ask for the contractor's license number to verify with your state's Department of Professional Regulation, or your contractor's state license board or similar office.

• And, of course, search the Internet for whatever you can find on the company.

Be wary of paying upfront. This is tricky, too, because even honest home contractors ask for money upfront, for good reasons. "Let's say you want your front door put in, and if the contractor makes the order, and you back out, they essentially own that front door," says Amy Matthews, a home contractor who has hosted numerous DIY Network and HGTV series and is a spokesperson for Home Advisor, an online portal that matches, for free, homeowners with licensed home contractors (homeadvisor.com).

So it isn't weird for a home contractor to ask for money upfront, but it shouldn't be astronomical numbers, says Matthews. "It's very common for home contractors to ask for a percentage, say, 30 percent at the start, 30 percent in the middle and the rest at the end, and you should never pay at the completion until you've really looked it over."

[Read: How to Find the Right Contractor for the Job.]

She adds that every state is different, and that in California, home contractors aren't allowed to ask for more than 10 percent of the job upfront. Meanwhile, some states have no regulations regarding home contracting projects.

It is also wise to pay a home contractor with a credit card instead of forking over a wad of cash or paying with a check. This will give you a record of the payment for the authorities and improve the odds of getting your money back if you are swindled, since credit card companies may refund your money in such situations.