Sorry i dont think you can protect your house but have very few rulebreakers on the server and if it happens we got the trusty admins to ban them very quickly.
If your house get griefed there is always people willing to help you repair because of the close community that we have so just ask (if it happens)

JOWEE849 wrote:

On other servers, Griefers totally destroyed my homes.

I don't know what kind of expereances you have had on other servers but here we are a community and we respect our fellow player's proporty. Because this community is so awesome and the admins have a near to zero tollorance to grifing we rarley have that problem any more. So really if you want to "protect" your land just put up a sign or two saying hey this is my land were i am building please don't mess with it and that really should be all you need

Hope this helps.