Square inc, one of today’s hottest startups recently underwent an office expansion in the San Francisco-base headquarters.

The space was originally fit out by Studio 0+a, architects of Aol Palo Alto, Facebook Palo Alto, Yelp SF, Dreamhost, and Microsoft’s Garage of Innovation. While the office design began with a ‘Mad Men’-ish inspiration board, the space has since developed a sense of self that incorporates both Mid-century design as well as contemporary style.

You’ll notice that the space has a neutral color palette of grays and browns which are fitting given the office’s old school location — The San Francisco Chronicle Building. The space is also fit out using some of Studio o+a’s own designs, plus a healthy amount of Steelcase Think Chairs.

Wish we had more images to share with you all, but these are the only that can currently be had. Have a great holidays!