Do I need a DIFC will to protect my Dubai property from Sharia inheritance?

For non-Muslims it's strongly advisable. Without a registered UAE will, Dubai assets can default to Sharia succession shares rather than your wishes. A will registered with the DIFC Wills and Probate Registry gives full testamentary freedom over your UAE assets. A single full will costs around AED 10,000, with drafting fees extra; registration can be done virtually.