Construction projects involve several professionals from various disciplines over the contract duration; contract claims and disputes among various stakeholders are hence inevitable. Construction contracts become more complicated along with the increasing complexity in design, construction process, and construction technology. Recently, Modular and Off-site Construction (MOC) has gained popularity and expanded its global market shares. However, there are yet no standard contracts for MOC to this date. Stakeholders usually adopt pre-drafted standard contracts, originally structured for conventional construction, and modify them based on project requirements. In this respect, there is an urgent need to evaluate such contracts' suitability for MOC projects. This can be done by analyzing the contractual disputes and their root causes through the literature, litigation, and their correlation based on the features of the MOC. This thesis develops a comprehensive framework which consists of (i) developing a model composed of a comprehensive list of contractual dispute causes, as documented in the literature and classifying them; (ii) examining the critical factors by classifying the Canadian court cases to identify the major root causes of litigation disputes based on the proposed model; and (iii) identifying lessons to prevent the dispute causes in the MOC by evaluating the interrelations between the result of case analysis and Canadian standard construction contract documents. The Canadian court system at two levels (of Supreme and Superior Courts) has been scoped, and 191 cases have been selected and analyzed for this study. As a result, the finding of this thesis can help contract drafters/administrators and general contractors recognize common causes of disputes to enhance the contract administration and management in MOC when drafting and administering the contracts in the new projects.