# Limit How Many Sites Each User Can Create

> Stops a user from signing up for another site once they already own the number you set; super admins are never limited.

- Type: PHP
- Runs: Run everywhere
- Category: [Multisite](https://wpide.com/library/category/multisite/)
- Tags: signup, limits, sites
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/ms-limit-sites-per-user/

## Code

```php
if ( ! is_multisite() ) {
    return;
}

$wpide_max_sites = 1; // Sites a user may administer.

add_filter( 'wpmu_validate_blog_signup', function ( $result ) use ( $wpide_max_sites ) {
    $user = isset( $result['user'] ) && $result['user'] instanceof WP_User ? $result['user'] : wp_get_current_user();

    if ( ! $user || ! $user->exists() || is_super_admin( $user->ID ) ) {
        return $result;
    }

    $owned = 0;
    foreach ( get_blogs_of_user( $user->ID ) as $blog ) {
        $caps = get_user_meta( $user->ID, $GLOBALS['wpdb']->get_blog_prefix( $blog->userblog_id ) . 'capabilities', true );
        if ( is_array( $caps ) && ! empty( $caps['administrator'] ) ) {
            $owned++;
        }
    }

    if ( $owned >= $wpide_max_sites ) {
        $result['errors']->add( 'blogname', sprintf( 'You can have up to %d site(s) on this network.', $wpide_max_sites ) );
    }

    return $result;
} );
```

## Notes

Counts sites where the user is an administrator. Applies to the front-end signup form and the "Add new site" screen for non-super-admins.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Limit How Many Sites Each User Can Create" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/