SAN FRANCISCO — Group 24 LLC has become a 50 percent partner with Turnberry Ltd. for the development of Turnberry Tower, a condominium tower located in San Francisco’s Rincon Hill neighborhood. Located at 45 Lansing St., the 40-story tower will offer one-, two- and three-bedroom residences, townhouses, penthouses and tower-suite units. Condominiums will range in size from 1,000 to more than 3,800 square feet and offer outdoor terraces featuring views of the city, bay and bridge. Additionally, the project will feature a fitness center, an indoor swimming pool, and 24-hour valet parking, security, concierge and front desk personnel. The $300 million project is the first collaborative effort for the companies.