The Resort at Summerlin opened on July 15, 1999, with a casino and a hotel tower known as the Regent Grand Spa.

[2] Developers envisioned it as a luxury golf and spa resort, similar to those found in destinations like Scottsdale, Arizona and Palm Springs, California.

[4][5] The property would have relationships with several nearby golf courses, including exclusive control of half of the tee times at the neighboring Tournament Players Club at the Canyons.

[6] The company faced some opposition from nearby residents after modifying the project plans to include a second hotel tower.

[13][15] The opening had been delayed by three days because of the 1999 Las Vegas flood, which caused minor water damage to electrical circuits.

[16] Because of construction delays, other amenities, including the spa, pool, retail shops, and more restaurants, opened over the following months.

[21][22] In June 2000, Swiss Casinos announced plans to purchase a 22-acre (8.9 ha) parcel next to the Regent and to develop it with timeshare units and tennis courts,[23] but this project never came to fruition.

Signs of financial trouble appeared as early as November 1999, when the resort's operating company revealed that it was seeking new financing and its credit rating was downgraded.

[24][25] By March 2000, the resort was in technical default on its mortgage debt, as a result of having borrowed additional money from Swiss Casinos.

[32] Real estate developer Peccole Nevada was selected as the stalking horse bidder, with an offer of $150 million, but then withdrew its bid after a disagreement with its financing partner.

[33][34] A new bid of $80 million by Los Angeles-based hotel company Maritz, Wolff was then selected, but was also withdrawn after negotiations with the Regent's creditors broke down.

[42] Convention space was doubled in 2003 with the opening of a 31,000 sq ft (2,900 m2) expansion, built at a cost of $4.9 million.

[45] Meanwhile, revenues declined because of a slow economy and increased competition from newly opened Strip resorts, leading the property to again default on its mortgage payments.

A bingo hall was added in 2014,[49] and room renovations were completed the following year, while convention-center remodeling was scheduled to conclude in early 2016.