How To Build An Underground Bunker Under Your House. Step 1, check the legal and zoning requirements. If you excavate illegally and someone finds out, you will face a fine and have to fill it in, or your council will fill it in and charge you for the privilege. x research sourcestep 2, plan and research every aspect in great detail.
You can use a super secret bunker for safety or storage. After the tubes are covered with a thick layer of rock, workers connect the sections of tubes and pump out any remaining water. Dig a hole a least 2 feet deeper than the height of the shipping container.