It's about as big as The White House
(Washington, DC) (including wings)
Housing the presidency, the White House occupies six stories and a total of 670 squares of floor space. This space includes 132 rooms, 35 bathrooms, 28 fireplaces, and 3 elevators, as well as a tennis court, bowling alley, movie theater, jogging track, swimming pool, and putting green.
It's about one-and-one-fifth times as big as a Football field
In other words, 670 squares is 1.163194444 times the size of a Football field, and the size of a Football field is 0.8597014929 times that amount.(American) (per NFL regulation)
Per NFL rules, a football field should measure 109.728 m (120 yards) long by 48.768 m wide, for a total area of 576 squares. Due to a blizzard, the first NFL playoff game in 1932 was held indoors in Chicago Stadium (it was also the first indoor game) on a field measuring just 55 m by 40.0 m, for a total area of 236.80602920 squares.
It's about three-fourths as big as The Palace of Holyroodhouse
In other words, 670 squares is 0.77 times the size of The Palace of Holyroodhouse, and the size of The Palace of Holyroodhouse is 1.3 times that amount.(a.k.a. Holyrood Palace) (Royal Mile, Old Town, Edinburgh, Scotland, United Kingdom) (Palace without gardens)
The Palace of Holyroodhouse, the residence of the British Monarch in Scotland, measures about 870 squares, on a total grounds area of about 4,300 squares. Each year, the Palace hosts a Garden Party, serving 8,000 guests from a 150-meter-long buffet table.
It's about three-fourths as big as Seal Island
In other words, 670 squares is 0.77 times the size of Seal Island, and the size of Seal Island is 1.3 times that amount.(Western Cape province, South Africa)
Seal Island, named for the tens of thousands of Cape Fur Seals that live there, measures about 870 squares. The large number seals attract great white sharks, who circle the island in a so-called "Ring of Death."
It's about one-and-two-fifths times as big as Bill Gates' Home
In other words, 670 squares is 1.391 times the size of Bill Gates' Home, and the size of Bill Gates' Home is 0.7189 times that amount.(Medina, Washington)
One of the largest homes in the world, Bill and Melinda Gates' home has a total area of 481.60 squares, including 7 bedrooms, 24 bathrooms, 6 kitchens, 6 fireplaces, a 24.760 squares gym, a 9.6880 squares dining room, and a 20.450 squares library. It was designed by Bohlin Cywinski Jackson, the same architectural firm responsible for the design of one of Apple Inc's flagship stores on Fifth Avenue in New York City.
It's about three-fifths as big as a City Block (Manhattan)
In other words, 670 squares is 0.6 times the size of a City Block (Manhattan), and the size of a City Block (Manhattan) is 2 times that amount.(per Bridges, William - 1811 Commissioner's Plan for New York City) (approximate)
A Manhattan city block measures about 200 m between the Northeast-Southwest streets by about 60 m between the Northwest-Southeast streets for a total area of about 1,000 squares. There are roughly 2,000 blocks within the city, representing one of the most prolific applications of the city planning grid plan in history.
It's about half as big as Trafalgar Square
In other words, 670 squares is 0.52 times the size of Trafalgar Square, and the size of Trafalgar Square is 1.9 times that amount.(a.k.a. Charing Cross) (City of Westminster, London, England, United Kingdom)
Trafalgar Square, a public square in London, measures about 1,300 squares. m in total area. At the center of the Square is the 52 m Nelson's Column monument, built in the 1840s.