I'm not sure of the cost, as I've been quoted anywhere from $30 to $150. One thing you do want to be careful of though is hiring somebody who is insured. There's been a rash recently (saw it on 60 minutes or something) of people who offer to do household repairs/cleanup like cleaning gutters and then they have an "accident" on your property. They can file a claim against your homeowners insurance if they aren't self-insured. So make sure you check it out and good luck!