Can I file a mechanic lien on a clients home?

I am a Remodeling licensed contractor in Maryland. My company has been performing work at a clients home. Are agreement from the start was a day rate for 2 men $1600.00and I supply all materials needed with a 10-15 % markup. Once each phase was finished, a invoice was emailed with time and material breakdown. Customer then paid in full. This has been the on going practice for the past 6-7 months. Customer wanted to get custom cabinets made for there laundry room. Cabinets were picked out and priced. Customer agreed on price and signed the order form. Customer gave and authorized me to use there credit card to make approximately$ 27000.00 deposit on a $35711.72 order. Now with cabinets already made but not ship he want to cancel and receive full credit. Also included in cabinet purchase agreement was approximately 3 days of install work.