StormShelterCompare

Storm Shelter Cost Calculator

Combine capacity, shelter type, and your state for a 2026 installed price range. State rebate offsets are applied automatically when applicable.

Quick answerA 6-person FEMA P-320 safe room in Oklahoma runs roughly $6,300 to $12,000 installed in 2026. After the SoonerSafe rebate (capped at $2,000), the net cost lands around $4,300 to $10,000. Adjust the inputs below for other configurations.

Estimated 2026 installed price

$4,500 to $7,500

SoonerSafe requires FEMA P-320 documentation. Switch shelter type to FEMA P-320 safe room to see the rebated price.

How the estimate is calculated

  1. Base 2026 installed price range for the selected capacity
  2. Multiplied by the shelter type factor (above-ground baseline, P-320 +40-60%, cellar +100-140%)
  3. Adjusted by state cost multiplier (Texas slightly above baseline, Alabama slightly below)
  4. For P-320 selections, the state rebate is subtracted at the published reimbursement rate, capped at the program maximum

State-specific cost detail

Frequently Asked Questions

How accurate is this storm shelter cost estimate?+

The calculator returns a 2026 installed price range based on national averages and state cost multipliers. Final quotes vary with slab condition, garage access, door upgrades, and rebate paperwork requirements. Use the range as a sanity check on dealer quotes.

Does the estimate include a state rebate?+

Yes, when the state runs an active program. The calculator subtracts the typical reimbursement (capped at the state's published maximum) to show the post-rebate net cost. Final eligibility depends on documentation and program enrollment status.

What is not included in the estimate?+

Premium door upgrades (ADA-compliant 32 inch opening), custom paint or finish, electrical pre-wire, and any slab replacement work above standard prep. These typically add $200 to $1,500 depending on scope.

Get Matched With Installers

Optional secondary path. The primary way to compare prices is the orange button above.

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