| 1991-04 |
Establishment of New Japan Development Co., Ltd. |
| 1991-04 |
Established: April 1991 (Heisei 3) |
| 1996-04 |
Established a construction department and entered the housing business |
| 1998-10 |
Completion of headquarters building (current headquarters building annex) |
| 1999-11 |
Renamed to New Japan Grandy Co., Ltd. |
| 2002-04 |
Completion of new headquarters building |
| 2003-06 |
Completion of Utsunomiya Satellite Building |
| 2004-01 |
Renamed to Grandy House Co., Ltd. |
| 2005-04 |
Establishment of Grandy Precut Co., Ltd. (now General Livtech Co., Ltd.) |
| 2005-12 |
Listed on the Second Section of the Tokyo Stock Exchange |
| 2006-11 |
Establishment of Sumikae Information Center Co., Ltd. (now Used Housing Information Center Co., Ltd.) |
| 2007-11 |
Establishment of Ibaraki Grandy House Co., Ltd., Gunma Grandy House Co., Ltd., and Grandy Reform Co., Ltd. |
| 2009-12 |
Established a northern Tochigi Prefecture base |
| 2011-12 |
Listed on the First Section of the Tokyo Stock Exchange |
| 2013-02 |
Establishment of Chiba Grandy House Co., Ltd., and relocation of Gunma Grandy House headquarters to Takasaki |
| 2014-07 |
Grand Plaza opened in Nakaimazumi, Utsunomiya City, Tochigi Prefecture |
| 2014-09 |
Achieved a total of 10,000 new homes sold |
| 2015-04 |
Grand Plaza opened in Interpark, Utsunomiya City, Tochigi Prefecture |
| 2015-12 |
Grand Plaza opened at Ibaraki Grand House headquarters |
| 2017-03 |
Prefectural South Branch new building completed, Grand Plaza relocation |
| 2019-04 |
Saitama Branch opened |
| 2019-07 |
Acquired shares and made Plaza House Inc. (now Kanagawa Grand House) and Welcome House Inc. subsidiaries |
| 2021-10 |
Saitama Branch new building completed, adjacent to Grand Plaza |
| 2022-02 |
Achieved a total of 20,000 new homes sold |
| 2024-06 |
Obtained Platinum Kurumin Plus certification as a company supporting balancing infertility treatment and work, and child-rearing support |
| 2024-08 |
Announced custom home |
| 2025-09 |
Grandir Remodel "Utsunomiya Showroom" Opening |
| 2026-02 |
Mitaka Branch Opening |
