We are an engineering firm, looking to file a Design Lien. I am having trouble finding the actual form for one. Are they the same form as the Mechanic's Lien. Also, I have read that these can only be filed on private projects only. We are looking to file one with a home builder company. Is this something we can do, or does it have to be a Mechanic's Lien. This is very new to us. I am very familiar with the Mechanic Lien side of contracting, but this is slightly different. Any help is greatly appreciated.