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Sean M. Sherlock

Sean M. Sherlock

Partner| Orange County

Sean Sherlock represents real estate developers, investors, and lenders in environmental, land use, and real estate litigation matters.  He litigates cases under the California Environmental Quality Act (CEQA), and advises clients preparing Environmental Impact Reports (EIRs) and other CEQA documents needed to obtain project approvals.  Sean has extensive experience representing clients in environmental cases involving contaminated properties, air and water quality, and government enforcement actions.  He also represents clients in a variety of real estate and business litigation, including contract disputes, commercial landlord-tenant disputes, loan enforcement, and eminent domain.

Sean keeps abreast of changes in these areas through his active involvement in real estate industry organizations including the Legislative Affairs Committee for the National Association of Industrial and Office Properties (NAIOP) SoCal chapter, and the Society of Industrial and Office Realtors, Orange County/Inland Empire chapter.  Sean's education and early professional experience as a chemical engineer and Environmental Specialist for Chevron U.S.A. gives him a unique industry perspective and understanding of the issues businesses face.

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  • Defended multiple real estate developers in multiple lawsuits under the California Environmental Quality Act (CEQA) seeking to set aside clients' development entitlements.
  • Advised numerous real estate developer clients on compliance with California Environmental Quality Act (CEQA) and preparation of Environmental Impact Reports (EIRs).
  • Defended metal plating company and owners in federal lawsuit brought by California Department of Toxic Substances Control (DTSC) under Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and related indemnity claims.
  • Represented real estate developer in lawsuit against major oil company for damages resulting from leaking underground storage tanks at retail gas station.
  • Defended major oil company in multiple lawsuits arising from contamination at retail service stations and fuel terminals across California.
  • Represented commercial real estate developer in protest of application by public utility to install electric power transmission lines across client's property.
  • Defended hospital in enforcement action brought by South Coast Air Quality Management District, alleging violations of air quality regulations.
  • Defended entertainment company in toxic tort lawsuit alleging exposure to lead on children's product.
  • Defended manufacturer of soap products against mass toxic tort action filed by multiple plaintiffs alleging exposure to multiple toxic substances.
  • Defended environmental consulting company against lawsuits by homeowners alleging personal injuries resulting from toxic mold exposure, and related indemnity claims by homeowners association.
  • Represented entertainment company in lawsuit alleging violation of Proposition 65 as result of runoff of allegedly contaminated storm water from client's studio lot.
  • Represented public interest group in federal and state lawsuits challenging U.S. Department of Interior's fee-to-trust acquisition of property for Indian casino, challenging California Governor's concurrence in the approval, and defending California referendum rejecting the casino.
  • Represented real estate developer in action against city alleging breach of development agreements.
  • Represented real estate developer in code enforcement lawsuit brought by City of San Diego.
  • Represented real estate investor in enforcement proceeding by Regional Water Quality Control Board to impose a cleanup and abatement order, and defended client on appeal to the State Water Resources Control Board.
  • Represented purchaser of contaminated commercial property in dispute with seller.
  • Defended multiple clients in various industries against U.S. EPA administrative orders and enforcement actions under CERCLA, and in their participation in Superfund site groups.
  • Defended numerous clients in various industries against Proposition 65 lawsuits.
  • Advised real estate investor in zoning conflict with City of Tustin.
  • Advised numerous real estate investors, developers, lenders, and other companies on environmental issues arising in real estate and corporate transactions.
  • Counselled clients on environmental compliance issues relating to storm water runoff, hazardous materials, air emissions, and other environmental issues. 
  • Represented national bank in multiple actions against commercial real estate developer to appoint receiver over multiple properties in Los Angeles, Sacramento, San Diego, and Riverside Counties, judicially foreclose on the properties, and pursue the guarantors for breach of loan guarantees totaling $220 million.
  • Represented national bank in Orange County action against homebuilder and over 100 lien claimants to appoint receiver and foreclose on 31 residential development projects located across California, Arizona, and Colorado, and to clear $13 million in liens from the properties.
  • Represented national bank in multiple Marin County actions against developer and guarantors to judicially foreclose on real properties and pursue loan guarantees securing 15 loans totaling over $32 million.
  • Represented national bank in Los Angeles County action against developer for breach of $18 million in loan guarantees.
  • Represented national bank in Marin County and Riverside County actions against real estate developer for breach of loan guarantees.
  • Represented lender in eminent domain lawsuit by CalTrans to take the real property securing client's loan.
  • Represented lender in tax foreclosure lawsuit brought by County of Sacramento.
  • Represented real estate investor in real property encroachment lawsuit.
  • Represented real estate investor in multiple unlawful detainer actions against retail tenants.
  • Defended various clients in commercial unlawful detainer actions.
  • Loyola Law School, Loyola Marymount University (J.D., 1992)
  • Michigan Technological University (B.S., Chemical Engineering, with high honors, 1986)
  • National Association of Industrial and Office Properties (NAIOP)
    • Legislative Affairs Committee (2007-present)
    • National Sub-Committee on Environment & Infrastructure (2013-present)
  • American Bar Association
  • "Ports Update and Labor Unions Impact on Development," Co-Presenter, Society of Industrial and Office Realtors, Newport Beach, CA (September 8, 2016)
  • "A Sensible Proposal for CEQA Reform," Author, Orange County Business Journal (November 23, 2015)
  • "United States: California Water Law Update," Co-Author, Mondaq (August 20, 2015)
  • "Bill is Wrong Approach to Protect Workers From Wage Theft," Author, Daily Journal (August 18, 2014)
  • "2014 Legal and Legislative Update for Commercial Real Estate," Co-Presenter, Society of Industrial and Office Realtors, Newport Beach, CA (January 27, 2014)
  • "Case Study: American Trucking v. LA," Author, Law 360 (October 4, 2011)
  • "Good News For Calif. Developers," Author, Law360 (August 11, 2011)
  • "Case Study: Oasis West Realty v. Goldman," Author, Law360 (May 23, 2011)
  • "Warning: California Has Listed 'Wood Dust' Under Proposition 65," Author, Daily Journal (December 2010)
  • "Water, Global Warming Critical Issues," Real Estate Southern California (January 2008)
  • "From Drugs to Tire Tread: Daubert Test to Admit Expert Testimony Applies to Technical, Not Just Scientific, Experts," Co-Author, abtl Report (Orange County), Volume I, No. 2 (May 1999)
  • "Cleaning Up the Mess: Dealing With Property Contamination," Journal of Property Management (January 1999)
  • "Dealing with Contaminated Soil," Journal of the Greater Los Angeles Apartment Association (October 1997)
  • "Contaminated Soil," Apartment Management Journal (October 1997)
  • "Lead-Based Paint Requirements for Apartment Owners and Managers," Apartment Management Journal (September 1997)
  • "Recent Breakthroughs in the Regulation of Underground Storage Tanks," Orange County Business Journal (March 1997)
  • "The Long and Unexpected Reach of State and Federal Oil Spill Laws," California Environmental Insider (May 1993)

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  • Wiley W. Manuel Award for Pro Bono Legal Service, State Bar of California (2013-2016)
  • Southern California Super Lawyers®, Environmental (2011)
  • Big Brothers/Big Sisters of Orange County, Volunteer Big Brother (1997-2008)
  • Serra Catholic School, Capital Campaign Committee (2008-2013)
  • Orange County Coastkeeper, Board Member (2008-2011)
  • AYSO Volunteer Referee (2008-2016)
  • Boy Scouts of America, Troop 818, Committee Member and Assistant Scoutmaster (2014-2017)
  • Environmental Specialist and Process Engineer, Chevron U.S.A.
    • Products Company, El Segundo, California
  • California
  • United States Supreme Court
  • Supreme Court of California
  • United States Court of Appeals, Ninth Circuit
  • United States Court of Appeals, District of Columbia Circuit
  • United States District Court, All Districts of California