Letter of Map Revision 25-04-1944P for the unincorporated areas of Williamson County is listed in FEMA’s Changes in Flood Hazard Determinations notices. The Federal Register of January 29, 2026 (91 FR 3901–3904, FR Doc. 2026-01745) and the June 11, 2026 notice (91 FR 35514–35517, FR Doc. 2026-11674) both print a April 10, 2026 date of modification and community number 470204.
That is a flood-map revision. It is not a homeowners endorsement, not a condo HO-6, and not a flood policy by itself. The table does not name streets, subdivisions, or buildings. Owners and buyers have to look the parcel up. This article is informational only. It does not promise coverage, price, eligibility, or that any particular structure changed zone.
By All Seasons Insurance Group
What did FEMA publish for unincorporated Williamson County?
Both notices finalize new or modified Base Flood Elevations, base flood depths, Special Flood Hazard Area boundaries or zone designations, and/or regulatory floodways as shown on the indicated Letter of Map Revision. Each LOMR revises the Flood Insurance Rate Maps, and in some cases the Flood Insurance Study reports, currently in effect for the listed communities.
| Item | Unincorporated areas of Williamson County |
|---|---|
| Case No. | 25-04-1944P |
| Chief executive officer | The Honorable Rogers Anderson, Mayor, Williamson County, 1320 West Main Street, Suite 125, Franklin, TN 37064 |
| Community map repository | Williamson County Engineering, 1320 West Main Street, Franklin, TN 37064 |
| Date of modification | April 10, 2026 |
| Community No. | 470204 |
| Federal Register (proposal print) | January 29, 2026; 91 FR 3901–3904; FR Doc. 2026-01745 |
| Federal Register (June list) | June 11, 2026; 91 FR 35514–35517; FR Doc. 2026-11674; FEMA Docket No. B-2581 |
Source: Federal Register Tennessee / Williamson rows in FR Doc. 2026-01745 and FR Doc. 2026-11674. The LOMR is available for inspection at the repository above and online through the FEMA Map Service Center. Use the current effective community number for new policies and renewals.
Does the April 10 LOMR name streets or subdivisions?
No. The Federal Register table does not print a street list. A parcel in the unincorporated county belongs under community 470204. A Franklin city mailing address is not automatically the same community number. Compare the panel in effect before April 10, 2026, with the revised panel. The table names no subdivisions.
Is this the same map action as the Williamson County HO-6 condo post?
Same case number. Different stack. Our live Williamson County HO-6 post covers the master policy and unit-owner forms. This piece is the flood-map row: FIRM revision, community number, lender map dates, and a separate flood policy conversation. Do not paste an HO-6 limit onto a zone letter.
Does a standard homeowners policy cover flood after this LOMR?
Usually not. Flood is typically excluded from a standard homeowners form. Our Tennessee flood guide is blunt on that point. Flood coverage is a separate NFIP or private policy. Typical NFIP new-policy waiting periods are 30 days, with limited exceptions. A dropped lender requirement after a map change is not the same as no flood risk.
Where is the map repository for unincorporated Williamson County?
The Federal Register names Williamson County Engineering, 1320 West Main Street, Franklin, TN 37064. Confirm the panel there if the online printout and the lender letter disagree.
How do I look up a Williamson County address on the FEMA Map Service Center?
Open msc.fema.gov/portal/advanceSearch. Use community number 470204. Compare the pre–April 10, 2026 panel with the revised panel. Save both printouts. Ask the lender, in writing, which map date and community number it is using.
What should a Williamson County homeowner or buyer do this week?
- Look the parcel up under both map dates for community 470204.
- Confirm the panel at the named map repository.
- Pull the current homeowners declarations page and keep any flood quote on a separate page.
- If a lender letter cites a zone, match it to community 470204 and to the April 10, 2026 modification date—not to a different Tennessee LOMR.
- Bring the Map Service Center printouts to a free policy review at All Seasons Insurance Group, 865-263-1400.
What is LOMR 25-04-1944P, and when did it take effect?
It is the FEMA Letter of Map Revision listed for unincorporated Williamson County in FR Doc. 2026-01745 (January 29, 2026) and FR Doc. 2026-11674 (June 11, 2026). Modification date: April 10, 2026. Community number 470204. The notice does not list which buildings changed zone. It says the LOMR is finalized for the listed community.
Seasons change. So should your coverage.
All Seasons Insurance Group can sit a Map Service Center printout next to a homeowners declarations page and walk the flood conversation separately. That is a free policy review or quote—not a coverage promise and not a guarantee of eligibility or price. Call 865-263-1400 or request it at https://asigtn.com/get-a-quote/.
This article is informational only. It does not promise coverage, price, eligibility, or that any parcel changed zone.
Source links
- Changes in Flood Hazard Determinations (FR Doc. 2026-01745)
- GovInfo PDF — FR-2026-01-29 / 2026-01745
- Changes in Flood Hazard Determinations (FR Doc. 2026-11674)
- GovInfo PDF — FR-2026-06-11 / 2026-11674
- FEMA Map Service Center — Advanced Search
- Williamson County’s April 10 Flood-Map Revision Is Listed — Condo Owners Still Need the Master Policy and an HO-6
- Tennessee Flood Insurance: Everything Homeowners Need to Know in 2026
- Get a Quote — All Seasons Insurance Group
