by Jodi Summers
Building skyscrapers in Los Angeles is difficult and expensive. Beyond the costly price of land, geographic issues like earthquakes and proximity to the San Andreas Fault line, as well as L.A. rigorous engineering and green standards.
Currently, this list of tallest buildings in Los Angeles ranks skyscrapers L.A. by height. Our tallest building is the 73-story U.S. Bank Tower. Finished in 1989, it rises 1,018 feet and stands as the tallest building in the state of California, tallest building west of the Mississippi, and the 10th-tallest building in the United
States.
The history of skyscrapers in Los Angeles began with the 1903 completion of the
Continental Building , a 151 ft (46 m), 13-storey high-rise at 408 South Spring Street, and has evolved to include this impressive collection….

1. U.S. Bank Tower
633 W. Fifth St. Completed in 1989. 1,018 feet, 73 stories.
Architect: Henry N. Cobb
Our U.S. Bank Tower is the 47th-tallest building in the world, 10th-tallest building in the United States, tallest building on the West Coast of the United States, tallest building in California; and the tallest building in the world with a helipad on its roof. Formerly known as Library Tower; at the time of its completion, the building was the tallest structure in a major active seismic region (Taipei 101 now holds this title.)

2. Aon Center
707 Wilshire Blvd. Completed in 1973. 858 feet, 62 stories.
Architect: Charles Luckman
Aon Center is the 133rd-tallest building in the world, 31st-tallest building in the United States; tallest building constructed in Los Angeles in the 1970s.

3. Two California Plaza
Two California Plaza at 350 S. Grand Ave. Completed 1992. 750 feet, 52 stories.
Architect: Arthur Erickson
Two California Plaza takes kudos for being the 72nd-tallest building in the United States; tallest building constructed in Los Angeles in the 1990s.

4. Gas Co. Tower
Gas Co. Tower at 333 W. Fifth St. Completed in 1991. 749 feet, 52 stories.
Architect: Richard Keating
Known as the 77th-tallest building in the United States.

5. Bank of America Plaza
Bank of America Plaza at 333 S. Hope St. Completed in 1974. 735 feet, 55 stories.
Architect: Albert C. Martin
The 92nd-tallest building in the United States used to be known as Security Pacific Bank Plaza, ARCO Plaza, and BP Plaza.
Los Angeles went through a large building boom that lasted from the early 1960s to the early 1990s, during which time the city saw the completion of 30 of its 32 tallest buildings, including the U.S. Bank Tower, Aon Tower, and Two California Plaza. The city has 25 skyscrapers at least 492 feet in height, more than any other city in the Pacific coast region. As of July 2011, there are 505 completed high-rises in the city.
12 skyscrapers approved or proposed for construction. The most recently completed skyscraper in Los Angeles is L.A. Live Ritz-Carlton Hotels & Condominiums, which rises 653 feet 199 m and 54 floors.

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http://www.latimes.com/business/money/la-five-tallest-buildings-in-los-angeles-20130206,0,6352335.photogallery
http://www.socalofficerealestateblog.com/?p=2336
http://en.wikipedia.org/wiki/List_of_tallest_buildings_in_Los_Angeles
http://i83.photobucket.com/albums/j283/dsought/ContinentalBuilding1903_0073.jpg
http://www.luxurytravelmagazine.com/images/article/USA/California/Downtown_LA/Ritz-Carlton-Los-Angeles-a-aerial-view.JPG
http://www.socalmultiunitrealestateblog.com/?p=2345