Multiple domains on same IP address, same niche but different locations.

[TheReachers]

I have a reseller web hosting account. I have more than 30 domains hosted on this account, and I have only one IP address. The websites are exactly similar in terms of niche but different locations, for example

plumberlondon.co.uk
plumberleeds.co.uk
plumbermanchester.co.uk

I am using almost same link building method.

My question is, is it safe enough to be not penalised by Google?

Would appreciate your opinions.

Thanks

[Highland]

They're all plumbing related. It makes sense that they would link to each other.

The main thing is not to overdo your links. If you're overdoing it with your links it could draw a penalty. Sure, you could go for the whole "different class C" approach, but I find that to be slightly grey (if Google didn't exist, would you even consider doing your hosting like that?)

As to your external link building, why would it matter as long as the links are relevant? If I run drainsupply.com, it makes sense for me to link to all your plumber sites.

Just make sure your sites all have unique content. That's a far greater danger for you than link patterns.

[Cyrus-Shepard]

In my view, it's not a big problem to have these sites on the same server, as long as each site has unique content, and there isn't a huge amount of inter-linking between the sites. (in which case, 30 sites would sound a lot like a link network to me, which would risk all of your sites being de-indexed)

What is potentially a problem is making sure each site is truly unique. This means having unique content (including navigation and in some cases, unique templates - although some would argue this is a bit extreme) You say that the sites employ the same link building methods - does this mean they all have links from the exact same sources? Again, you could be stumbling into link network territory again... or Google may choose to place less value on those links.

It's a murky area, and you'll have to use your own analytics and judgement to tease the answers out of Google. I'd say your not in trouble just because of the shared IP, but my suspicion tells me your in a dangerous neighborhood.

Hope this helps. Best of luck with your SEO!