Restrict non-admin members from adding new pages in your WordPress site.
New WordPress plugin WP Restrict User ‘ADD NEW PAGE’ Capability prevents non admins from adding new pages, it also hides the Add New page option from non-admins dashboard. Simply install and activate it and you are done.
You Can Also Disallow Add New Post Option For Non-admins:
If you like disallowing Add New Post option too then then try WP Restrict User ‘ADD NEW POST’ Capability, it activates the same feature for posts.