It might not be possible to install an in-ground shelter in an area with solid rock, or a high water table or unusual soil conditions (as in many parts in Texas, Oklahoma or Arkansas).
An underground shelter typically offers the best protection from extremely high winds, but requires the use of stairs that can be difficult for the elderly or handicapped. Related articles: Aboveground Storm Shelter, In-Ground Storm Shelter, Basement, Standby Generator, Flooded Basement, Roof Repair Installation, delivery charges and optional features can bring the total cost to $4,000-$22,000 or more, depending on shelter materials (typically fiberglass or steel), size (the number of people expected to need shelter), delivery distance and soil conditions. A factory-built in-ground storm shelter (like a pared-down version of a bomb shelter, designed for people to take refuge for short periods of time where only the entrance is visible in a yard or inside) can cost $2,500-$18,000 or more for up to 8'x14'. Aboveground units can be installed inside the house (typically in the basement or somewhere on the first floor, often in a garage) or outdoors, as a stand-alone structure.) A factory-built aboveground safe room (a welded steel box, a steel skeleton with steel planks or a prefabricated unit that is bolted together on site) that is anchored to the house foundation or on a separate concrete slab can cost $3,000-$12,000 or more for up to 8'x10' for just the unit, or $5,500-$20,000 or more with delivery and installation. For new house construction or remodeling an existing home, building a structurally-reinforced and anchored aboveground safe room (similar to a fortified bank safe) that can also be used as a master closet, bathroom or utility room typically costs $6,500-$10,600 for an 8'x8'x8' space or $12,000-$17,100 for 14'x14'x8', according to FEMA. (Although residents of tornado-prone areas have traditionally been told to take refuge in a basement if a storm shelter is not available, a basement is not necessarily a good tornado shelter unless it has been designed and reinforced to survive high winds and debris.) If a safe room meets FEMA P-320 standards, FEMA estimates there is a high probability that the occupants of a safe room built to these guidelines will avoid injury or death. Officially called a "safe room," a storm shelter can be aboveground (often constructed/installed in a basement or garage, but it can also be built/installed outdoors on a separate slab) or in-ground (with just the entrance showing aboveground, and the entrance might be outdoors or inside the home, such as in a closet ). 
2023 Cost of a Storm Shelter - Estimates and Prices PaidĬostHelper > Home and Garden > Safety & Services > Storm ShelterĪboveground Storm Shelter: $3,000-$20,000+
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