Contractor bill issue - legal / ethical advice - Colorado

[Shawn Loftis]

So - I had hail damage from the May 8th storm. I hired a general contractor to make restorations. We are having an issue over $1800 of non-recoverable depreciation. He thinks I owe it and I don't.

Once the repairs are complete, can I withhold any of the money owed until there is an agreement on the $1800? Basically, I want to pay the "final" amount due - Not the amount I feel I owe and then still have the $1800 hanging out there. If i do that then I don't have any leverage to close the issue.

It was around a $30K job. I have paid $19k. We pretty much agree on everything other than the $1800 and one or two items on the Statement of Work.

Can I legally hold 10-20% of the job back until they give me full lien release? There isn't much in the contract outlining payment disputes. Just that I owe the balance upon completion and will be charged 1.5% interest on the balance. 

What are my options? 

Thanks,

Shawn