The Hahn Company, also known as Ernest W. Hahn, Inc., was a major American shopping center owner and developer from the 1950s to the 1980s, based in San Diego, California. Purchased by the Trizec Corp. in 1980 (which then took the name TrizecHahn), it became defunct.

History The company was founded and managed by Ernest W. Hahn (1919–1992). During its 30 years of existence. the company built 45The Free Library shopping malls in 18 states, from Florida to Oregon.New York Times, December 30, 1992 Their first major project was the regional shopping mall La Cumbre Plaza in Santa Barbara, California, which opened in 1967. Hahn went on to become the largest mall builder in the Western United States.Evolution of the Shopping Center, History Department, University of San Diego

The innovative Horton Plaza mall in downtown San Diego, which opened in 1985, helped lead the rejuvenation of the city's downtown area. It was the first successful downtown retail center since the rise of suburban shopping centers decades earlier.Horton Plaza Redevelopment Project, in Journal of San Diego History, Summer 1995 Hahn had previously built the Fashion Valley and Parkway Plaza malls in San Diego.

In 1980, Trizec Corporation, of Toronto, Ontario, acquired the company's shopping center interests. Trizec took the new name TrizecHahn to reflect the purchase. TrizecHahn exited the shopping center business in 1998. The majority of its properties west of Las Vegas were acquired by Westfield America, Inc. (precursor to The Westfield Group) and those east of Las Vegas by the Rouse Company.

Projects and investments La Cumbre Plaza (1967) - Santa Barbara, California Valley Plaza Mall (1967) - Bakersfield, California Montclair Plaza (1968) - Montclair, California Fashion Valley Mall (1969) - San Diego, California Galleria at Tyler (1970) - Riverside, California Downtown Plaza (1971; portions of the mall were demolished in 2014 and later redeveloped) - Sacramento, California Los Cerritos Center (1971) - Cerritos, California Sunrise Mall (1971) - Citrus Heights, California Westfield Oakridge (1971) - San Jose, California Fashion Place (1972) - Murray, Utah Parkway Plaza (1972) - El Cajon, California Laguna Hills Mall (1973) - Laguna Hills, California Puente Hills Mall (1974) - Industry, California The Shops at Santa Anita (1974) - Arcadia, California Mt. Shasta Mall (1975) - Redding, California Rimrock Mall (1975) Billings, Montana Newmarket North Mall (1975; redeveloped as NetCenter in 2000) - Hampton, Virginia Westfield Culver City (1975) - Culver City, California Pueblo Mall (1976) - Pueblo, Colorado Capital Mall (1977) - Olympia, Washington Hawthorne Plaza Shopping Center (1977) - Hawthorne, California Redlands Mall (1977) - Redlands, California Vintage Faire Mall (1977) - Modesto, California Westfield UTC (1977) - University City, San Diego, California Meadows Mall (1978) - Las Vegas, Nevada The Oaks Mall (1978) - Thousand Oaks, California Santa Maria Town Center (1978) - Santa Maria, California Westdale Mall (1979; demolished in 2014 and is currently under redevelopment) - Cedar Rapids, Iowa Mesa Mall (1980) - Grand Junction, Colorado Ogden City Mall (1980; demolished in 2002 and redeveloped as The Junction) - Ogden, Utah Plaza Pasadena (1980; demolished in 1999 and redeveloped into The Paseo in 2001) - Pasadena, California Santa Monica Place (1980) - Santa Monica, California Jointly developed with The Rouse Company. Now an outdoor mall. Clackamas Town Center (1981) - Clackamas, Oregon The Courtyard (1981; redeveloped into Promenade on the Peninsula in 1999) - Rolling Hills Estates, California San Mateo Fashion Island (1981; demolished in 1996 and redeveloped into Bridgepointe Shopping Center in 1997) - San Mateo, California Fashion Show Mall (1981) - Paradise, Nevada Mall of Memphis (1981; demolished in 2004) - Memphis, Tennessee Solano Town Center (1981) - Fairfield, California Long Beach Plaza (1982; demolished in 2000 and redeveloped into Long Beach City Place in 2003) - Long Beach, California The Shops at Palm Desert (1982) - Palm Desert, California Santa Rosa Plaza (1983) - Santa Rosa, California The Village at Corte Madera (1985) - Corte Madera, California Horton Plaza (1985) - San Diego, California Mershops North County (1986) - Escondido, California Westfield Valley Fair (1986) - Santa Clara, California Bridgewater Commons (1988) - Bridgewater, New Jersey East Hills Mall (1988) - Bakersfield, California Sierra Vista Mall (1988) - Clovis, California Towson Town Center (1991 expansion wing) - Towson, Maryland Prudential Center (1993) - Boston, Massachusetts Park Meadows (1996) - Lone Tree, Colorado Prizm Outlets (1998) - Primm, Nevada Miracle Mile Shops (2000) - Paradise, Nevada Ovation Hollywood (2001) - Hollywood, California

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