We estimate the time required to build a Magento website based on the work needed. For example, the time will increase if you need a new website or change the whole UX/UI part or the architecture. The store size, features, and technology setup also influence the development speed. On average, design may take 410 to 695 hours, and development may take 860 to 1,680 hours in case of a complete redesign and creating a PWA.