Can I file a mechanic's lien against a homeowner that cancelled the contract before the job was finished and only paid 3rd of the amount owed what's a total job when I completed more than 50% and they canceled for no reason
Contract claims when improperly terminated on a construction project
Note, also, that there could be legal causes of action in play - beyond a mere mechanics lien filing - when an owner has improperly terminated their contractor. Namely, actions based in breach of contract and wrongful termination might be on the table.
Recovering payment without actually filing a lien
Finally, keep in mind that there are tools that can help with payment recovery without the need for actually filing a mechanics lien or pursuing legal claims.
Payment demand letters
A payment demand letter lets a customer know that you're serious about getting paid, and that a contractor won't sit idly by if payment isn't made. By sending a demand letter with specific legal threats, a contractor may be able to push their customer to do the right thing and pay what's owed. More on that here: Demand Letters for Contractors – How To Write One That Gets You Paid.
Notice of Intent to Lien
A Notice of Intent to Lien can take things a step further. It acts like a warning shot - informing a customer that if payment isn't made and made soon, then a lien claim will be filed against their project. Considering the drastic nature of mechanics liens, customers will usually want to do what it takes to avoid a lien claim - so they're more likely to pay what's owed on the job. You can learn more about that recovery tool here: What Is a Notice of Intent to Lien and Should You Send One?