You've pretty much protected your personal assets by forming the LLC. Now you need to decide how much to protect the Corporation. What kind of exposure does the Corporation have? Are you building multiple homes at one time in a Subdivision the Corporation owns? Model homes where you are inviting the public onto the jobsite or streets and creating more of a risk than a typical construction site? I don't think the "home owners" policy is going to be a viable route. The Corporation has an investment to protect (not just sticks and mortar) but it's assets as well.
We're in Commercial Construction (S Corp) and do carry an Excess Liability - Umbrella policy of $5,000,000. for what it's worth.
Good luck in your venture!