Experienced Experts

Located in the Los Angeles area and established in 1991, SJDA is a full-service real estate and business valuation firm. At SJDA our philosophy is simple: Superior quality and impeccable service should be available at a competitive fee. Our reports are dictated by the needs of our clients, clients who often need a multi-disciplinary or innovative approach. SJDA has prepared hundreds of valuations and often testified at depositions and in court. Please see our Real Estate Appraisal Services tab for a comprehensive list of properties appraised.

Litigation and Lending Specialists

SJDA has prepared valuations for estate and gift tax reporting, general litigation, property sales, and financing purposes. We also provide expert witness services.

Multi-Disciplinary Approach

Trained and experienced in various asset classes, SJDA excels in portfolios of residential real estate, commercial real estate, and intangible assets, including businesses and nested partnership/LLC interests. Mr. Decker has an MAI designation with the Appraisal Institute (Real Estate) and ASA designation with the American Society of Appraisers (Business Valuation), so he has the top designations in two disciplines. He is also a California certified general real estate appraiser. He has training in real estate appraisal, business valuation, litigation valuation, and testimony. He has also published several articles. Please see our Business Valuation Services tab for a summarized list of financial assets and businesses valued.

Local Expertise with Regional Capabilities

Experienced in Los Angeles and Orange Counties, SJDA also prepares portfolio valuations for properties throughout the western states.


SJDA delivers responsive service for valuation reports and litigation support. We are available extended hours and can travel on short notice.


SJDA takes creative approaches in methodology and data research for estate portfolios and difficult valuations, such as damage valuations.

For a complimentary consultation, please call or email us at steve@sjdassoc.com to discuss your needs or to discuss our appraisal or litigation support capabilities.