Mechanic's Lien Guide for Contractors

What Is a Mechanic's Lien?

A mechanic's lien (also called a construction lien) is a legal claim attached to a property when a contractor, subcontractor, or supplier has not been paid for work or materials provided. It gives you a security interest in the property itself — meaning the owner cannot sell or refinance without paying you first.

Mechanic's liens are one of the most powerful tools available to contractors. Once recorded, they create serious pressure to pay because they cloud the title and block the owner's ability to transfer or borrow against the property.

Who Can File a Mechanic's Lien?

Most states allow the following parties to file a mechanic's lien:

• General Contractors — Directly contracted with the property owner
• Subcontractors — Hired by a general contractor to perform specific work
• Material Suppliers — Provided materials used in the construction
• Equipment Lessors — Rented equipment used on the project
• Design Professionals — Architects, engineers, and surveyors in many states

Lien Deadlines: The Critical Window

Missing the deadline permanently eliminates your right to lien. Every state has a strict deadline that begins from the last date you performed work or supplied materials.

Key deadlines by state:

• California — 90 days from project completion. Preliminary notice required within 20 days of starting work.
• Texas — Must be filed by the 15th of the third calendar month after the month in which the work was completed.
• Florida — 90 days from last furnishing of labor or materials. Preliminary notice required within 45 days.
• New York — 8 months from completion. No preliminary notice required.
• Colorado — 4 months from completion. Preliminary notice within 10 days of starting work.
• Washington — 90 days from completion. Preliminary notice within 60 days of starting work.

Always verify your specific state requirements — deadlines vary based on contract type, project type, and your role.

How to File a Mechanic's Lien: 5 Steps

Step 1: Confirm you are eligible

Verify your license is current, work has been completed or materials delivered, and you are within the filing deadline for your state and role.

Step 2: Send preliminary notice (if required)

Many states require you to send a pre-lien notice within days of starting work. Missing this step can void your lien rights entirely — even if all other requirements are met.

Step 3: Prepare the lien document

Include the property legal description, owner name, amount owed, and a precise description of the work performed. One error — wrong address, incorrect amount, wrong owner name — can invalidate the lien.

Step 4: Record with the county recorder

File the signed lien document at the county recorder's office in the county where the property is located. Pay the recording fee (typically $15–$50).

Step 5: Serve the owner

Most states require you to serve a copy of the lien on the property owner within a specific number of days after recording. Keep proof of service.

Common Mistakes That Void a Lien

• Missing the preliminary notice deadline
• Using the wrong property legal description
• Filing in the wrong county
• Incorrect claimant name or license number
• Failing to serve the owner after recording
• Waiting too long after the last date of work

After Filing: What Happens Next?

Most owners pay or negotiate within 30 days of a lien being recorded. If the owner ignores the lien, you may need to enforce it through a foreclosure action before the lien expires (typically 1–2 years, state-dependent).

A lien on the property title makes the property difficult to sell or refinance, which is why it is one of the most effective payment recovery tools available to contractors.

Get Help with Your Lien Filing

Kayron identifies your state, calculates your exact deadline, and prepares your jurisdiction-specific lien document — ready to file.