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Nossaman LLP

Katrina (Diaz) Wu


T 949.833.7800
F 949.833.7878
18101 Von Karman Avenue, Suite 1800
Irvine, CA 92612

Katrina Wu is an eminent domain and real estate litigation attorney focusing on eminent domain, inverse condemnation, regulatory takings, and valuation matters.  Ms. Wu also assists clients with land use/zoning, environmental, landlord/tenant, telecommunications and consumer dispute matters.

Ms. Wu has worked on some of the largest public works projects in California, defending transportation and infrastructure projects, assisting with the pre-condemnation and condemnation process, drafting and arguing motions, propounding and responding to discovery, and assisting with trial preparation.

Ms. Wu is actively involved in California’s real estate and transportation industries.  She serves as a Board member of the Women Transportation Seminar and works with Board and Advisory Board members of Mobility 21 to solve transportation challenges facing Southern California.  Ms. Wu is also committed to civil justice and provides pro bono legal assistance and other support to the Orange County Public Law Center.

Ms. Wu has presented on property acquisition and eminent domain related topics across the United States.  She also regularly comments on court decisions and policies affecting eminent domain on the Firm’s California Eminent Domain Report blog.  

Representative Work

  • T-Mobile.  Assist in a wide range of real estate, consumer and major litigation matters, including landlord/tenant and contract disputes, eminent domain and defending against state/federal consumer protection act violations.
  • City of Los Angeles/Los Angeles World Airports (LAWA).  Member of the team advising on real property matters related to a $5 billion dollar program to ease access in and out of LAX by developing a consolidated rental car center, an elevated automated people mover system, intermodal transportation facilities, and a joint station connecting to Los Angeles’ rail system.
  • Exposition Metro Line Construction Authority.  Assisting Metro in acquiring numerous properties for the Purple Line Westside Subway Extension Project, a $6-plus billion, 9-mile subway extension through Beverly Hills and Westwood.  Also assisting with the LAX/Crenshaw Transit Corridor Project, a $2-plus billion, 8.5-mile light rail line through the Crenshaw and Inglewood area.
  • San Diego Association of Governments.  Member of the team representing SANDAG with property acquisitions for the Mid-Coast Corridor Transit Project, a $1.7 billion, 11-mile trolley line extension from downtown San Diego to University City.  Also provided real estate/condemnation services for the Inland Rail Trails Project.
  • San Bernardino County Transportation Commission.  Member of the team acquiring properties for the Downtown San Bernardino Passenger Rail Project/San Bernardino Transit Center and the Redlands Passenger Rail Project, which projects will combine to provide a 10-mile extension of Metrolink rail service in the Inland Empire.  Also, worked with SBCTC on the acquisition of approximately 65 properties for the Downtown Passenger Rail Project, a proposed Metrolink commuter rail line between San Bernardino and Redlands.
  • Southern California Edison.  Member of the team representing Edison in right-of-way acquisition services for the Falcon Ridge Substation Project which involves construction of a new substation and electrical transmission lines through San Bernardino County.  Work included defeating a property owner’s right to take challenge and securing favorable rulings on significant motions.
  • Metro Gold Line Foothill Construction Authority.  Represented client in defending inverse condemnation and real property tort claims related to the Metro Gold Line Extension Project, and secured judgment in client’s favor.
  • Exposition Metro Line Construction Authority.  Member of the team that assisted the Authority in acquisitions of commercially developed properties in Santa Monica necessary for future terminal stations for Phase II of the project, and in securing easements for street widenings and utility relocations.
  • Orange County Transportation Corridor Agencies.  Member of the team providing representation related to the Tesoro Extension (SR 241).

Awards & Honors

Selected to the Rising Stars list for 2015-2018

Wiley W. Manuel Certificate for Pro Bono Legal Services, California State Bar Association, April 2014

Katrina (Diaz) Wu
Katrina (Diaz) Wu



J.D., Chapman University School of Law, 2012, cum laude; Articles Editor, Chapman Law Review; Moot Court Executive Board Member

B.A., University of California, Irvine, 2006



U.S. District Court, Central District of California

Professional Affiliations

Women Transportation Seminar, Scholarship Committee Chair, Orange County Chapter

Mobility 21, Member

Eminent Domain and Land Use Committee Member of the Transportation Research Board

International Right of Way Association, Chapter 67

Orange County Bar Association, Pro-Bono Committee Member

Awards & Honors

Selected to the Rising Stars list for 2015-2018

Wiley W. Manuel Certificate for Pro Bono Legal Services, California State Bar Association, April 2014

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