Sumitomo Realty & Development Co., Ltd. is a Japanese real estate development company headquartered in Shinjuku, Tokyo. It is a member of the Sumitomo Group.

It is one of the three largest real estate developers in Japan, alongside Mitsubishi Estate and Mitsui Fudosan. As of 2018, it has the second-largest real estate portfolio in Japan (after Mitsubishi), with a total value of 5.7 trillion yen.

The company was founded as Izumi Real Estate Co., Ltd. in 1949 following the dissolution of the Sumitomo conglomerate. It adopted its current name in 1957.

From the early 1960s, Sumitomo was active in developing and selling condominium properties.

Sumitomo Realty held its initial public offering on the Tokyo and Osaka stock exchanges in 1970.

The company's first high-rise project was the Shinjuku Sumitomo Building, completed in 1974. This building became the company's head office. At the time of its completion, it was the tallest building in Tokyo (but was overtaken by the nearby Shinjuku Mitsui Building several months later), and its elevators were the fastest in the world.

Sumitomo entered the real estate leasing and brokerage businesses in the late 1970s; commercial and residential leasing now accounts for the majority of its income.

The company's headquarters moved to the 30-story Shinjuku NS Building (a Sumitomo-developed property) in 1982.