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Logan, UT Environmental Rules: Flood Zones (2026)

Significant Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified October 2026

FEMA flood zone rules in Logan, UT, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Permit: Special floodplain development permit, section 15.27.070
Floodplain administrator: City engineer
Residential lowest floor: Two feet above base flood elevation
Floodway: Encroachments prohibited without no-rise analysis
Flood study: Flood Insurance Study for Cache County dated May 9, 2023
Penalty: Misdemeanor under chapter 1.16

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Logan, UT.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Logan, UT on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Logan City, Utah requires a special floodplain development permit for construction in a special flood hazard area under Chapter 15.27 of the Logan Municipal Code. New homes need the lowest floor two feet above the base flood elevation, and encroachments in the regulatory floodway are prohibited unless engineering analysis shows no rise in flood levels.

A special floodplain development permit for construction in the special flood hazard area, shall be required to ensure conformance with the provisions of this chapter. ... A. Residential Construction: New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated two feet (2') above the base flood elevation. ... A. Encroachments are prohibited, including fill, new construction, substantial improvements and other development within the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base flood discharge.

View official code

Full Breakdown

Chapter 15.27, Flood Damage Prevention, applies under section 15.27.050 to all areas of special flood hazard identified by FEMA within Logan. Section 15.27.060 adopts the Flood Insurance Study for Cache County dated May 9, 2023, with its flood insurance rate maps and floodway maps, and automatically adopts all FEMA effective maps and studies. Section 15.27.070 requires the special floodplain development permit, and the city engineer serves as floodplain administrator under section 15.27.120.

Applications under section 15.27.140 go to the floodplain administrator and need the lowest-floor elevation from a registered professional land surveyor, floodproofing elevations and an engineer or architect certificate for nonresidential floodproofing, and a site plan showing flood zones, base flood elevations, fill and drainage. The administrator can waive the site plan for accessory buildings less than 200 square feet. Approval turns on ten factors, including danger to life and property, safety of access in a flood, and the availability of alternative locations.

Section 15.27.160 requires anchoring, flood-resistant materials, and electrical, heating, ventilation, plumbing and air conditioning equipment two feet (2') above the base flood elevation. Section 15.27.170 sets the residential lowest floor two feet (2') above base flood elevation. Enclosures below it need at least two openings with one square inch of net area per square foot of enclosed area, the bottom of each no higher than one foot (1') above grade. Recreational vehicles in zones A1-30, AH and AE must stay fewer than one hundred eighty (180) consecutive days, be ready for highway use, or meet the permit and anchoring rules. Section 15.27.210 keeps new critical facilities outside the 500-year floodplain where possible.

Section 15.27.200 prohibits floodway encroachments, including fill and new construction, absent hydrologic and hydraulic proof of no increase in flood levels. The Land Use Appeal Board hears variances under section 15.27.150, and none can issue in a floodway if flood levels would rise.

Violations & Fines

Section 15.27.220 makes noncompliance with Chapter 15.27, including violations of permit conditions, a misdemeanor, and the penalty provisions in title 1, chapter 1.16 apply. Under section 15.27.230 the city has sole discretion to file a civil or criminal judicial case or pursue administrative enforcement, and administrative actions follow the procedures in LDC chapter 17.60.

Frequently Asked Questions

Do I need a permit to build in a Logan flood zone?

Yes. Section 15.27.070 requires a special floodplain development permit for construction in the special flood hazard area. Applications go to the floodplain administrator, who is the city engineer, with elevation data from a registered professional land surveyor and a site plan under section 15.27.140.

How high must a new Logan home sit above the base flood elevation?

Section 15.27.170(A) requires new construction and substantial improvement of any residential structure to have the lowest floor, including basement, elevated two feet (2') above the base flood elevation. A registered professional engineer, architect, or land surveyor must certify to the floodplain administrator that the standard is met.

Can I build in the Logan regulatory floodway?

Section 15.27.200(A) prohibits encroachments, including fill, new construction and substantial improvements, unless hydrologic and hydraulic analyses done under standard engineering practice show the encroachment would not increase flood levels during the base flood discharge. Variances are barred in a floodway if flood levels would rise.

Who hears flood variance requests in Logan?

Section 15.27.150 assigns variance requests and appeals of floodplain administrator decisions to the Land Use Appeal Board established in Land Development Code Chapter 17.50. Anyone aggrieved by that board's decision can appeal to District Court. The administrator records every variance action and reports variances to FEMA on request.

Sources & Official References

[1]Logan Municipal Code (American Legal)

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