The process to reform the Resource Management Act is being pushed back by at least two months.

The delay is being caused by more than 1000 submissions and issues raised during public hearings.

It means the local government and environment select committee is late in reporting back to parliament.

It has been given until September to reach conclusions on a bill that several stakeholders have found fault with.

The legislation is due to go through the house of representatives by the end of the year.

It was introduced in draft form last November.