The RERA Act does not prescribe one fixed limitation period for every type of complaint. Generally, a complaint should be filed within a reasonable period from the date when the cause of action arises. The limitation can depend on the nature of the dispute and the applicable provisions of the Limitation Act.
For example, if the builder has failed to give possession, delayed the project, or violated the agreement, the relevant date and whether the cause of action is continuing can be important. Therefore, it is better not to wait unnecessarily before filing the complaint.
Also, RERA complaint and consumer complaint have different limitation rules. Under the Consumer Protection Act, a consumer complaint is generally required to be filed within 2 years from the date the cause of action arose, subject to condonation of delay for sufficient cause.
In short: If you have a RERA-related dispute with a builder, file the complaint as soon as possible rather than assuming you automatically have a fixed 3-year period.
If you tell me what your issue is (possession delay, refund, interest, defective construction, etc.) and when it happened, I can explain the likely limitation period for your specific case.