---
title: "What Is Substantial damage? Building Glossary | Halo Homes"
description: "Substantial damage means repair costs equal or exceed 50 percent of a building's market value before the damage, which triggers current flood code."
url: https://build813.multisites.ai/glossary/substantial-damage
publisher: Halo Homes
phone: +1-813-956-1972
quote: https://build813.multisites.ai/contact
---

![Aerial view of waterfront homes on Tampa Bay with the downtown Tampa skyline in the distance](https://build813.multisites.ai/_astro/aerial-skyline.Bt8UN67d_Z2jdN5s.avif)

# Substantial damage

Substantial damage means repair costs equal or exceed 50 percent of a building's market value before the damage, which triggers current flood code.

FEMA defines substantial damage as damage from any cause where restoring the building would cost 50 percent or more of its value before the damage. The comparison uses market value, not repair cost alone. It ties directly to the [FEMA 50 percent rule](https://build813.multisites.ai/glossary/fema-50-percent-rule).

When a flood hazard home reaches that line, the City of Tampa says it must be brought up to current code, including raising it above the [base flood elevation](https://build813.multisites.ai/glossary/base-flood-elevation). A storm repair can turn into a rebuild. Our [flood zone guide](https://build813.multisites.ai/build-in-a-flood-zone-tampa) covers what to do first.

[Halo Homes can helpRenovation and remodeling](https://build813.multisites.ai/services/renovation-and-remodeling)

## Related terms

-   [FEMA 50 percent rule](https://build813.multisites.ai/glossary/fema-50-percent-rule)
-   [Substantial improvement](https://build813.multisites.ai/glossary/substantial-improvement)
-   [Base flood elevation](https://build813.multisites.ai/glossary/base-flood-elevation)
-   [Special flood hazard area](https://build813.multisites.ai/glossary/special-flood-hazard-area)

## Sources

1.  [FEMA: Substantial Damage](https://www.fema.gov/about/glossary/substantial-damage)
2.  [City of Tampa: Flood Information](https://www.tampa.gov/tss-stormwater/info/flood)

![Aerial view of waterfront homes on Tampa Bay with the downtown Tampa skyline in the distance](https://build813.multisites.ai/_astro/aerial-skyline.Bt8UN67d_ZwicJ3.avif)

## Start your home.

Tell Halo about your lot, your plans and your timing. A call or a short note is enough to begin.

[Start your home](https://build813.multisites.ai/contact)

Or call [(813) 956-1972](tel:+1-813-956-1972)