WP Redirect is not working

You’re using a + sign for the first instance of string concatenation. Using a . instead should fix it.

Additionally, WordPress provides some useful functions that might make this code easier:

wp_redirect(
    add_query_arg(
        array(
            'post_type'      => 'property',
            'search_keyword' => $search_keyword,
            'submit'         => 'Search',
            'price-min'      => $price_min,
            'price-max'      => $price_max,
            'city'           => $address_city,
            'state'          => $address_state,
            'zip'            => $address_zip,
            'beds'           => $beds,
            'baths'          => $baths,
        ),
        site_url()
    )
);

add_query_arg() allows you to build a URL with new query arguments, instead of using messy string concatenation.