Twitter recently left Midtown Manhattan for Chelsea, New York City's new tech area, and has settled in just a block away from Google. Originally, Twitter planned to move into Edward J. Minskoff's 51 Astor Place, a newly constructed, state-of-the-art building, but was pushed out when IBM snagged 120,000 sq. ft., leaving only the building's upper, more expensive floors for Twitter. Rather than paying an average of $115 per sq. ft. at 51 Astor, Twitter opted to relocate to a newly renovated tech office building at 245-249 W. 17th Street, where rents run $70 to $80 per sq. ft. Twitter's new home in New York is owned by Savanna, which bought the side-by-side buildings back in November 2012 for $76 million and redeveloped them with a $21 million capital infusion. Twitter leases 140,000 sq. ft. in the new buildings, which total 285,000 sq. ft. Last February, Crain's New York Business speculated that Twitter was looking for additional space in Manhattan, but a Twitter spokesperson quelled that rumor.

Downtown Detroit's Madison Theater cost $500,000 to build and was opened in 1917. The 1,806-seat theater, which was later torn down to make space for a parking lot, was grandly Neoclassical, and had a 35-ft.-wide, 60-ft.-high marquee at the top of its attached five-story, 50,000-sq.-ft. office building. The office building had been sitting empty when Quicken Loans founder Dan Gilbert bought it through his development company, Rock Ventures LLC in early 2011. The Madison was just one of nine buildings that Gilbert acquired in 2011, and is the cornerstone of the tech corridor he has created in Detroit. The interior of the new, renamed M@dison features exposed brickwork and ductwork, funky furniture and colorful artwork everywhere, designed by Jennifer Gilbert, the developer's wife and the founder of Doodle Home, an interior design firm.

The 30-story, class-A Century Square building was completed in 1985 and renovated in 2009. The building totals 614,723 sq. ft., with a typical floor being about 21,000 sq. ft., and the largest contiguous space totaling 35,587 sq. ft.

As other tech firms like Google flee Santa Monica for Vince or Play Vista, Twitter has embraced life in SaMo. In August 2014, Twitter received a license to do business at 150 Pico Boulevard and 1916 Main Street, two adjacent one-story buildings.

Twitter's international headquarters is a 1937 Art Deco building in San Francisco's gritty Tenderloin district, one of the city's long-depressed areas. The 1.1 million-sq.-ft. building was redeveloped as an adaptive reuse project by its owner, Shorenstein Properties, and reopened as a class-A office building in 2014 after standing empty for 50 years. Previously, it was known as the Western Furniture Exchange and Merchandise Mart. Today the building is known as "the Twitter building."

Shorenstein's redevelopment included LEED Gold certification, along with retaining the building's classic architectural details while installing state-of-the-art technology. Twitter leases three of the building's 80,000-sq.-ft. floors, which are decorated with a woodsy, natural theme. Screens throughout the offices show live bursts of Twitter activity from around the globe. Twitter's light-filled cafeteria opens onto a roof garden, and employees also have the option of utilizing the landscaped area between the Twitter building and 1-Tenth next door. The building's ground floor features a new 22,000-sq.-ft. food market and storefront cafe as well as a bank and high-end fitness center.

Twitter rents 8,000 sq. ft. in this two-story, 9,999-sq.-ft. Sunnyvale Business Park building. The park, owned by Principal Real Estate Investors, was completed in 1985, and the Twitter offices are in a building originally zoned for industrial and designed for research and development. Its biggest neighbor in the 34,862-sq.-ft. park is Wal-Mart, which focuses on it global tech platform there.One of the biggest draws for employees is the nearby CalTrain station, where baby bullet trains stop.

One American Center was built in 1984, and this three-tier, 32-story, 394-ft.-tall, 523,106-sq.-ft. building is now at the center of Austin's happening downtown area. The opulent structure, which features a five-story all-granite atrium, is home to several leading tech companies besides Twitter, like WeWork and DropBox.

From 1926 to 1979, this building served as Sears, Roebuck and Co.'s retail store, warehouse and regional headquarters. The retail store shutdown in 1979, but Sears continued operating offices there through 1987. In 1990, the City of Atlanta bought the building for $12 million to house 2,000 police and fire employees there, making it "City Hall East." The building closed to the public in 2010, and was sold to Jamestown, a private equity group, for $27 million in 2011. Jamestown in turn funded the $180 million plan by Green Street Properties to convert the building to mixed-use. The plan is to turn the building into the fourth nationally relevant food hall in the United States, alongside Seattle's Pike Place, San Francisco's Ferry Building and New York's Chelsea Market (also owned by Jamestown). The newly renovated 2.1 million-sq.-ft. building, which covers 16 acres, officially reopened as Ponce City Market in August 2014. The new building features rooftop gardens, class-A loft offices and high-end apartments, and has been listed by the National Trust for Historic Preservation. Located aloside the new BeltLine trail and Historic Fourth Ward Park, the revitalization effort is designed to bring the neighborhood together. Twitter has rented 8,000 sq. ft. of space and plans to employ 70 people there. It's been rumored that Google is also scouting the building for space.

Twitter left 5,500 sq. ft. at 180 N. LaSalle Street in Chicago's downtown for 16,000 sq. ft. on the 10th floor at 111 N. Canal in 2014 after doubling its Chicago staff to 30 in less than a year. The 102-year-old building has 16 stories and totals 840,000 sq. ft. It was repositioned as a state-of-the-art tech building by Sterling Bay, which had bought it in December 2012 for $100 million and spent $32 million on renovation and $39 million on tenant improvements. After attracting major tech company tenants like Uber, Gogo Inc., GoHealth LLC and Braintree Inc., Sterling Bay sold the building this past April to JP Morgan Asset Management for $305 million.

This LEED-Gold, Energy Star-labeled building is home to Techstars, a global startup incubator, and Gnip, the world's largest social data provider, founded in Boulder in 2008 and acquired by Twitter in May 2014. The class-A, 109,732-sq.-ft. building, completed in 1984, is one block from the popular Pearl Street Pedestrian Mall.

This building, owned by Clark Enterprises, is home to several tech companies, including Twitter, on the ninth floor, and global startup hub 1776 on the 12th floor. Twitter moved into the 201,000-sq.-ft. building in 2014 with 12 employees, although the firm began maintaining a presence in Washington in 2010 with the hiring of lobbyist Adam Sharp, with plans to hire more people. Recently renovated, the building features 460 linear ft. of glass per floor.