Guides
What flood insurance covers in a basement
NFIP flood insurance covers only a short list of basement items, like the furnace, sump pump and unfinished drywall. What is excluded and how to fill the gaps.
A National Flood Insurance Program policy covers a short, fixed list of items in a basement: the furnace and water heater, the sump pump, electrical boxes and outlets, unfinished drywall, the foundation and a few others, plus cleanup. It does not cover finished walls, flooring, furniture or electronics. If you have a finished basement, most of what you would want to replace after a flood is not on the list. Your homeowners policy will not pay for it either, because it excludes flood.
What counts as a basement
The standard flood policy defines a basement as "any area of a building, including any sunken room or sunken portion of a room, having its floor below ground level on all sides" (44 CFR Part 61, Appendix A(1)%20to%20Part%2061)). FEMA's January 2022 basement fact sheet adds that rooms that are not fully below ground, such as sunken living rooms, crawlspaces and the lower levels of split-level buildings, may still be basements because the lowest floor is below ground on all sides.
The words "on all sides" matter. By that wording, a lower level whose floor is at ground level on one side, such as a walkout, is not below ground on all sides. Whether yours was classified as a basement affects what is covered, so ask your agent how the lowest level was entered on the application.
The same list applies in a second situation. In an elevated post-FIRM building in a zone marked A1-A30, AE, AH, AR, V1-V30 or VE, items below the lowest elevated floor get the same limited coverage whether or not there is a basement. A separate rule affects earth-sheltered homes: the policy does not insure a building if more than 49% of its actual cash value is below ground, unless the lowest level is at or above the base flood elevation and is below ground only because earth was used as insulation in an energy-efficient design.
What the building coverage pays for
For the dwelling (Coverage A), the policy lists the items below. They must be installed in their functioning locations and, if needed for operation, connected to a power source. The list is exclusive: FEMA says items not specifically listed are not covered.
- Central air conditioners and heat pumps
- Furnaces and hot water heaters
- Sump pumps, well water tanks and pumps, and pumps and tanks used in solar energy systems
- Electrical junction and circuit breaker boxes, outlets and switches
- Fuel tanks and the fuel in them, and cisterns and the water in them
- Drywall for basement walls and ceilings, and the labor to nail it, only if unfinished, unfloated and not taped to the framing
- Nonflammable insulation in a basement
- Stairways and staircases attached to the building
- Elevators, dumbwaiters and related equipment (with an exception for equipment installed below base flood elevation after September 30, 1987)
- Water softeners and chemicals, water filters, and faucets installed as part of the plumbing system
- Required utility connections for any of these
- Footings, foundations, posts, pilings, piers and other foundation walls and anchorage systems that support the building
The policy also pays for cleanup, which FEMA's fact sheet says can include pumping out trapped floodwater, labor to remove spent cleaning solutions, treatment for mold and mildew and structural drying of salvageable interior foundation elements. It does not pay to remove non-covered items, even if removing them is necessary to reach covered repairs. FEMA's example is carpet installed in the basement.
What the contents coverage pays for
Contents coverage is separate, and you have to buy it. In a basement it covers only three kinds of property, and each must be installed in its functioning location and connected to power where that applies:
- Clothes washers and dryers
- Portable or window air conditioners
- Food freezers, other than walk-in units, and the food in any freezer
Couches, televisions, computers, exercise equipment, boxes of keepsakes and photographs are not covered in a basement. Contents are paid at actual cash value, not replacement cost, so what you receive for a ten-year-old dryer reflects its age.
What is left out
FEMA's examples of excluded items include basement improvements such as finished flooring, finished walls, bathroom fixtures and other built-ins, plus generators and similar items and dehumidifiers that are not integral to the heating and air conditioning system. In practice, that is most of a finished basement.
A hypothetical finished basement
Say a river flood puts water through a finished basement. These numbers are invented, ignore deductibles and depreciation, and show only how the list sorts the loss.
| Damage | Amount | On the NFIP basement list? |
|---|---|---|
| Furnace and water heater | $8,500 | Yes |
| Electrical panel, outlets and switches | $2,200 | Yes |
| Pump-out, cleanup and drying | $3,000 | Yes |
| Finished, taped and painted drywall | $9,000 | No |
| Flooring and carpet | $7,000 | No |
| Built-in bar and cabinets | $6,000 | No |
| Bathroom fixtures | $3,500 | No |
| Washer, dryer and freezer with food | $2,800 | Yes (contents, actual cash value) |
| Sofa, television and exercise equipment | $11,000 | No |
On a $53,000 loss, roughly $16,500 falls on the covered list, and about $36,500 does not. Real claims turn on the adjuster's scope, depreciation and the deductible, but the proportions are typical of how a finished basement fares.
When basement water is not a flood
Many basement losses are not floods under the NFIP's definition. The policy defines a flood as a general and temporary condition of partial or complete inundation of two or more acres of normally dry land, or of two or more properties, from sources including overflow of inland or tidal waters and unusual and rapid accumulation or runoff of surface waters. Water that enters because of a failed pump or sewer, or seeps up from the ground when no flood is in the area, falls outside it. The SFIP excludes sewer backup, sump pump overflow and seepage, and the pressure or weight of water, unless a flood in the area is the proximate cause.
The standard homeowners policy excludes the same events. In the 2011 edition of the ISO HO-3 (HO 00 03 05 11, the copy hosted by the Maine Bureau of Insurance), the Section I exclusion for water covers flood and surface water, water that backs up through sewers or drains or overflows from a sump or sump pump, and water below the surface of the ground that exerts pressure on or seeps through a foundation or other structure. Newer editions and insurers' own forms may differ, so check your policy and declarations page.
| What happened | NFIP flood policy | Standard homeowners policy | What might fill the gap |
|---|---|---|---|
| Overland flood enters the basement | Pays for items on the list | Excluded | A private flood policy with broader terms |
| Sewer or drain backs up, no flood in the area | Excluded | Excluded unless endorsed | water backup coverage endorsement |
| Sump pump fails or overflows, no flood in the area | Excluded | Excluded unless endorsed | Water backup endorsement |
| Groundwater seeps through the wall or floor | Excluded unless flood in the area caused it | Excluded | Usually nothing; prevention |
| A pipe bursts in the basement | Not a flood; excluded | Generally covered, subject to the policy | The homeowners policy |
water backup and sewer backup coverage and sump pump failure and basement flooding cover the endorsement and its limits. Also see is water damage covered by homeowners insurance? for the broader pattern.
How to close the gap
- Know the list. Compare the covered items above with what you actually have in the basement, and decide what you can live without replacing.
- Document the equipment. FEMA advises recording the manufacturer, model, serial number and capacity of the furnace, air conditioner and basement appliances before a flood. Add photos to your home inventory builder.
- Look at private flood policies. A private policy is written on the insurer's own form, so a finished basement may be treated differently. Read the basement language, not the headline limit; Private flood insurance vs the NFIP compares the two routes.
- Add water backup coverage. The endorsement is the usual answer to non-flood basement water. Ask about its dollar limit and whether sump pump failure is included.
- Raise what you can. Elevating the furnace, water heater and electrical panel reduces the damage the policy would otherwise have to cover. elevating a home and other flood mitigation covers the options, and water damage prevention: a homeowner's checklist lists the rest.
- Keep valuables upstairs. The simplest protection for a couch or a box of photographs is not to store it below ground.
If a flood does reach your basement, photograph the damage before removing anything, keep samples of flooring, and follow the sequence in how to file a flood insurance claim.
Key takeaways
- The NFIP covers only a listed set of items in a basement, such as the furnace, water heater, sump pump, electrical boxes, unfinished drywall and foundation elements, plus cleanup.
- Contents coverage in a basement is limited to washers and dryers, freezers and food, and portable air conditioners, paid at actual cash value.
- Finished walls, flooring, built-ins, bathroom fixtures, furniture and electronics are not covered.
- Sewer backup, sump pump overflow and seepage are covered by neither the flood policy nor a standard homeowners policy unless a flood in the area caused them or you added a water backup endorsement.
- A private flood policy may treat a finished basement differently, so compare the wording, not only the limits.