Your Business Matters to Our Construction Law Firm


The Leading Construction Law Firm in Seattle, WA

Avoid legal impediments to your operation’s ongoing success with services from the Clausen Law Firm (CLF). As the leading construction law firm in Seattle, WA, we provide you with representation for construction, real estate, land use, and small business law. We’re intimately familiar with local form subcontracts and the permitting process. Whether you need help navigating the regulations surrounding a design-build project or personalized legal advice for your business, our firm delivers the support you need to move forward.

Contact us today to request your free in-person or over-the-phone consultation. We proudly serve clients throughout King County and the Puget Sound region.

Receive a free 30-minute consultation.
Call (206) 926-8476

About Our Firm

Established in 1993 by attorney Mark Clausen, our business and construction law firm has developed a reputation among business owners and private individuals for taking on tough cases other firms won’t touch. We're frequently brought in to rescue cases before they are scheduled for trial or arbitration by parties needing effective legal representation at critical times. Thanks to our extensive experience, we get up to speed quickly and either negotiate a fast settlement, prepare the case for trial, or establish a new schedule so that the claim can be resolved fairly.

However, we aren't just "hired guns." Our construction, business, and real estate attorneys Mark Clausen, Morgan Blackbourn, and Steven Malek provide strategic representation to a broad array of clients with diverse concerns. We help with business formation, contract drafting and review, and more.

Our team understands that that trust is built not only by handling lawsuits effectively but also by helping our clients avoid them in the first place. That is why we work hard to preempt conflict by keeping our knowledge current and assuring our clients are on solid legal footing from the outset.


Thank you for your interest. We look forward to hearing from you soon.

Hours of Operation
Monday - Friday,
8:30 a.m.-5:00 p.m.

701 5th Ave Suite 4400
Seattle, WA 98104


(206) 926-8476
Service Area
Puget Sound Region