Off-site Construction (OSC) is an alternative to conventional construction. However, China lags behind developed countries interms of its OSC development. The chief goal of this study is to demonstrate the critical driving forces and solutions that promoteOSC development. A total of 21 hypotheses are established to present the interrelations among eight driving forces. Based on 176valid responses from developers in mainland China, a structural equation model is built to explore the key solutions and the criticaldriving forces. Most driving forces, such as Pursuit of Sustainable Competitiveness (PSC), Governmental Policies and Regulations(GPR), Technological Innovation (TI), Corporate Social Responsibility (CSR), and Construction Market Demand (CMD), can affecta Corporation’s Willingness and Behavior (CWB) in adopting OSC through two mediating factors, namely, Economic Benefits (EB)and social and environmental benefits. The findings highlight five main driving solutions to promote OSC, namely, “PSC → EB →CWB,” “PSC → TI → EB → CWB,” “GPR → TI → EB → CWB,” “GPR → CSR → CWB,” and “GPR → CMD → CWB.”Governments and project clients are also identified as important players in the development of OSC in China. These results provide avaluable reference for the government to understand the underlying interrelationships among the driving forces and key solutions tothe development of OSC in China.