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Home insurance & flood costs in ZIP 20879 (Gaithersburg, MD)

Plain facts for homeowners in Gaithersburg: what insurance cost here in recent years, how often claims were paid, and what flood coverage runs.

See the numbers

Historical averages, not a quote. Updated Oct 2026.

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ZIP 20879 at a glance

Four numbers most homeowners ask about first.

$1,284
Avg. home premium

Per policy in 2022 (inflation-adjusted), HO-3/HO-5 policies.

$426
Avg. flood policy

Single-family NFIP policies that took effect in 2025.

0.82%
Nonrenewal rate

Share of policies not renewed by insurers in 2022. Typical U.S. ZIP: 0.81%.

8.1%
Claim frequency

Share of policies with a paid claim in 2022. Typical U.S. ZIP: 4.0%.

ZIP 20879 in numbers
$13,924
average paid claim (2022)
+8%
premium change 2018–2022, after inflation
2.32%
cancelled by insurers mid-term (2022)
28
single-family NFIP policies (2025)

What homeowners here pay

Each block pairs a short explanation with the data behind it.

Homeowners insurance

U.S. Treasury FIO, HO-3/HO-5 policies, 2018–2022

The average premium per policy in ZIP 20879 was $1,284 in 2022, 22% below the Montgomery County typical ZIP ($1,638) and 17% below the typical U.S. ZIP code ($1,551). After adjusting for inflation, it rose 8% between 2018 and 2022. About 8.1% of policies here had a paid claim in 2022, and insurers chose not to renew 0.82% of policies.

Montgomery County overview

Average premium per policy

Inflation-adjusted dollars, Treasury FIO
ZIP 20879MontgomeryU.S. typical ZIP

Flood insurance

FEMA NFIP single-family policies, 2022–2025

The average single-family NFIP flood policy that took effect in ZIP 20879 in 2025 cost $426, based on 28 policies, compared with $445 in 2022. About 21% of them are for homes in high-risk A or V zones.

Average flood policy cost

Full cost incl. fees, by year the policy took effect

Policies by flood zone, 2025

28 policies
A zones 21%X/B/C zones 79%V zones 0%

Claims & hazards

Treasury FIO claim frequency; FEMA National Risk Index for Montgomery County

The chart shows the share of homeowners policies in ZIP 20879 with at least one paid claim each year. FEMA rates hazards for the whole county, not single ZIP codes. The top hazards for Montgomery County are listed below the chart, as national percentiles (100 = highest).

All county hazards

Policies with a paid claim

Share of policies, by year

Top county hazards

  • Winter weather99 · Very High
  • Heat wave97 · Relatively High
  • Strong wind97 · Relatively High
  • Hail95 · Relatively High
  • Inland flooding94 · Relatively High

Other ZIP codes in Montgomery County

Average premium per policy in 2022 (Treasury FIO). Showing 12 of 32; see the county page for all.

20814 Bethesda · $2,35520815 Chevy Chase · $3,02720816 Bethesda · $2,51120817 Bethesda · $2,61120832 Olney · $1,61320833 Brookeville · $2,07920837 Poolesville · $1,70220841 Boyds · $1,82720850 Rockville · $1,66120851 Rockville · $1,16420852 Rockville · $1,69120853 Rockville · $1,488

Practical next steps

Simple things homeowners in ZIP 20879 can do with this information.

Plan for heat and dry spells. Long dry periods can stress foundations and landscaping. Regular checks of your HVAC system and foundation can catch small problems before they become claims.
Compare at renewal. Premiums vary widely by ZIP code, home and insurer. Use these averages as a reference point, not a price, and compare a few quotes at renewal.
Keep records. A roof certificate, receipts for upgrades and photos of your home's condition can help when you shop for coverage or file a claim.
Review your deductibles. Many policies have separate wind, hail or hurricane deductibles set as a percentage of your dwelling coverage. Knowing yours in dollars helps you budget.

Historical averages, not a quote. Homeowners figures are inflation-adjusted averages from the U.S. Treasury Federal Insurance Office "Supporting Underlying Metrics" (2018–2022, published January 2025). They cover HO-3/HO-5 policies from participating private insurers and exclude state residual-market plans (such as FAIR plans and Citizens), surplus-lines and flood coverage. Treasury notes that individual ZIP codes can contain data anomalies. Your price depends on your home, coverage and insurer.

Sources: U.S. Treasury FIO; FEMA OpenFEMA NFIP Redacted Policies v3 (data as of Sep 8, 2026); FEMA National Risk Index (December 2025); U.S. Census Bureau ZCTA-to-county relationship file (2020) and county adjacency file; GeoNames place names. How we calculate these numbers.

This product uses the FEMA OpenFEMA API and National Risk Index data, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). SafeHomeFacts is independent and not affiliated with the U.S. Treasury, FEMA or any insurer.