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Centennial, CO Environmental Rules: Flood Zones (2026)

Heavy Restrictions

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

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

Key Facts

New structures: prohibited outright
Other development: needs floodplain permit
Enforced by: Floodplain Administrator
Applies in: FEMA-mapped flood hazard areas

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 Centennial, CO.

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 Centennial, CO on the FEMA flood map

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

Summary

Centennial bans new residential and non-residential construction in mapped floodplains outright, and allows any other floodplain development only if it won't restrict channel or drainage capacity.

B.Proposed Structures in the Floodplain.1.New Construction. New construction or installation of residential or non-residential structures shall be prohibited.2.Other Development. All other development in floodplains shall be prohibited unless shown to the satisfaction of the Floodplain Administrator through a floodplain development permit that the proposed development (as defined in Article 16) does not adversely affect the efficiency of, or unduly restrict the capacity of, the channels or floodplains of the mainstream or any tributaries to the mainstream, drainage ditches, or any other drainage facilities or systems.

View official code

Full Breakdown

LDC § 12-7-304(B) flatly prohibits new construction or installation of any residential or non-residential structure within the City's mapped floodplains. Other development, grading, fill, utilities, or site work, is likewise prohibited unless the applicant obtains a floodplain development permit and the Floodplain Administrator finds it will not adversely affect the efficiency or capacity of the floodplain, its channels, or drainage facilities. The Floodplain Administrator can attach conditions to any permit granted, including operational limits and a required map revision process. The rule applies citywide wherever FEMA's Flood Insurance Rate Map designates a special flood hazard area.

Violations & Fines

Building in a floodplain without a permit is an LDC violation; the Floodplain Administrator can hold or revoke permits, and municipal court may fine up to $2,650 per day (§§ 12-15-302, 1-4-10).

Frequently Asked Questions

Can I build a new house in a Centennial floodplain?

No. LDC § 12-7-304(B)(1) prohibits new construction or installation of any residential or non-residential structure in a mapped floodplain, with no permit path around that ban.

Can I still grade or add utilities in a floodplain?

Only with a floodplain development permit from the Floodplain Administrator, who must find the work won't restrict the channel's or drainageway's flood-carrying capacity.

Sources & Official References

[1]Centennial Municipal Code § 12-7-304 (Municode)

Other rules in Centennial

Noise Ordinances: Construction HoursSome Restrictions Erosion ControlSome Restrictions Stormwater ManagementSome Restrictions Flood Elevation RequirementsSome Restrictions Noise Ordinances: Amplified Music & Outdoor SoundSome Restrictions Parking Rules: EV ChargingSome Restrictions Parking Rules: Loading ZonesSome Restrictions Fence Regulations: Retaining WallsSome Restrictions Fire Regulations: Wildfire ZonesSome Restrictions

All Centennial rules

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