When you open a business you create a different set of expectations than you have for your home. You have the expectation of people coming and going in a business. Your home is a different matter. For example your home and your business will have different zoning. You will have different insurance requirements on your home and your business. There are a lot of differences.
Further corporations are legal entities treated as persons for matters of convenience on a legal basis, but they aren't really persons with rights. When did you ever hear of a corporation exercising a right to vote? Or a corporation exercising it's 5th amendment rights. Corporations don't have those rights. To have the same expectation of rights for a corporation as a person is somewhat unrealistic.
As an example suppose you're a employee/stockholder (as are most employees of corporations with 401k plans), then you are at least in part an owner of the corporation, so if you carry a firearm in your car onto the corporate parking lot you're actually carrying it onto (part) of your own property.
IMO, the rights are those of the people who own the corporation. I see no reason why those rights would disappear simpley because more than one person is involved.