hey there, i've developed a couple different (unrelated) sites and have them on the same hosting plan. i was thinking of adding a few more. if i change the hosting (and DNS settings) for one of the sites would this affect the SEO? thanks in advance for any replies.
It shouldn't cause any detrimental effects at all. I've had sites do perfectly fine both before and after changing their hosted IPs to and from a shared IP to a dedicated one.
Well, if you have a web site targeted to US market and hosting on USA IP address and then moving to UK or DE IP will change your SEO results for sure.