- 1949
- Izumi Real Estate Co., Ltd. established as the successor to the holding company of the Sumitomo zaibatsu following the breakup of the conglomerate.
- 1957
- Izumi Real Estate Co., Ltd. changed its name to Sumitomo Realty & Development Co., Ltd.
- 1963
- Merged with the holding company of the former Sumitomo zaibatsu during its liquidation.
- 1964
- Entered condominium sales business with Hama-Ashiya Mansion in Kobe, Hyogo Prefecture.
- 1970
- Listed on the Tokyo and Osaka stock exchanges.
- 1973
- Established Sumitomo Fudosan Tatemono Service Co., Ltd., a consolidated subsidiary.
- 1974
- Completed construction of 52-story Shinjuku Sumitomo Building in Shinjuku, Tokyo; moved Company headquarters there from Tokyo Sumitomo Building in Marunouchi, Tokyo.
- 1975
- Established Sumitomo Real Estate Sales Co., Ltd., a consolidated subsidiary.
- 1980
- Established Sumitomo Fudosan Syscon Co., Ltd., a consolidated subsidiary.
- 1982
- Completed construction of 30-story Shinjuku NS Building in Shinjuku, Tokyo; moved Company headquarters there from Shinjuku Sumitomo Building.
- 1995
- Commenced American Comfort custom home construction business.
- 1996
- Commenced Shinchiku Sokkurisan remodeling business.
- 1997
- Entered high-quality business hotel market. Opened Villa Fontaine Nihonbashi and hotels at two other locations.
- 1998
- Sumitomo Real Estate Sales Co., Ltd., a consolidated subsidiary, listed on the Tokyo Stock Exchange.
- 1999
- Commenced real estate joint investment trust fund. Launched sales of Sumitomo Realty & Development Fund (SURF) series.
- Implemented the Sumquest bond issue, which was the first public issue of real estate securities in Japan.
- 2000
- Commenced luxury condominium leasing business. Completed construction of La Tour Shibakoen.
- 2001
- The number of managed STEP brokerage offices exceeded 200.
- 2002
- Completed construction of Izumi Garden Tower (Roppongi 1-Chome Redevelopment Project).
- 2003
- Commenced sales of J·URBAN fixed-price urban-style housing series.
- 2004
- Commenced sales of World City Towers in Minato Ward, Tokyo.
- 2006
- Established Sumitomo Fudosan Reform Co., Ltd., a consolidated subsidiary.
- 2007
- Commenced Koraku 2-Chome West District redevelopment construction (Bunkyo Ward, Tokyo).
- 2008
- Established Sumitomo Fudosan Bellesalle Co., Ltd., a consolidated subsidiary.
- Commenced sales at City Towers Toyosu The Twin (Koto Ward, Tokyo).
- Commenced redevelopment work in the Nishi Shinjuku 8-Chome District (Shinjuku Ward, Tokyo).
- 2009
- Cumulative total number of orders for Shinchiku Sokkurisan remodeling business surpassed 50,000.
- 2010
- Commenced sales of J·SKY, the sixth product in the J·URBAN series.
- Completed construction of Shinjuku Central Park City(Shinjuku Ward,Tokyo)
