Can I sell my off-plan property before handover in Dubai?

Usually yes. Most SPAs require you to have paid a minimum (commonly 30-40%, sometimes more) before you can assign the contract to a new buyer. You need a developer No Objection Certificate (NOC), then complete an Oqood transfer at the DLD. Total costs - DLD 4%, NOC and assignment fees, agent commission - often run 7-11% of the price.