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Kansas Counties
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Overview
LOCAL ADOPTION ONLY. NO mandatory statewide residential building code. NO statewide energy code. NO statewide contractor licensing. Individual municipalities and counties choose whether to adopt codes. Kansas State Fire Marshal has limited jurisdiction (state buildings, schools, healthcare) - does NOT enforce residential building codes statewide. Substantial portions of rural Kansas have no adopted building code. Kansas City metro (Johnson County) and Wichita generally have comprehensive codes. Climate Zones 4A (south) and 5A (north/central). Tornado Alley: 90+ tornadoes/year. High hail risk. Expansive clay soils in eastern KS. Frost depth 24-42 inches.
Code Snapshot
Current editions in effect
Building Code
IBC Local Adoption
Local Adoption
Code
ICC 2020
2020 Edition
Code
ICC 500 2020
2020 Edition
Building Code
IEBC Local Adoption
Local Adoption
Energy
IECC 2018
2018 Edition
Energy
IECC-C Local Adoption
Local Adoption
Effective Date: January 1, 2024
Verified: Mar 2026
Jurisdiction Complexity
Kansas is a MODERATE complexity state
Kansas applies state-level code amendments to ICC base codes, with some variation across local jurisdictions.
SimpleModerateComplex
Wind-Borne Debris
Varies by locality →Key Rules & Requirements
Critical regulations for Kansas restoration work
Kansas has NO mandatory statewide residential building code. Cities and counties adopt independently. Major cities use IRC but code editions and amendments vary significantly.
Important: Kansas does not mandate a statewide residential building code. The Kansas Housing Resources Corporation and local jurisdictions handle code adoption independently. Major cities (Wichita, Kansas City KS, Topeka, Overland Park, Lawrence, Olathe) have adopted versions of the IRC with local amendments. Johnson County suburbs generally follow more recent code editions. Rural counties may have no adopted code. The absence of a statewide code means contractors must verify requirements for every jurisdiction they work in.
Per IRC R314 and R315 where locally adopted, smoke alarms required in each sleeping room, outside sleeping areas, and on each story. CO alarms required near sleeping areas with fuel-burning appliances.
Important: In Kansas municipalities that adopt the IRC (Wichita, Overland Park, Kansas City KS, Topeka), R314 requires smoke alarms in each sleeping room, outside each separate sleeping area, and on each additional story including basements. R315 requires CO detectors outside each sleeping area when the dwelling has fuel-burning appliances or attached garage. Kansas has no mandatory statewide residential code — requirements apply only in jurisdictions adopting the IRC.
Kansas has no statewide general contractor licensing requirement. Some municipalities require local contractor registration. Electrical, plumbing, and mechanical trades may require state or local licensing.
Important: Kansas does not require a statewide license for general contractors or roofing contractors. Individual municipalities set their own contractor licensing requirements. Wichita, Overland Park, Kansas City KS, and Topeka require local contractor registration or licensing. Electrical contractors may need local licensing. Plumbing work is regulated at the local level. Always verify local contractor licensing requirements before starting work in a new jurisdiction.
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Code Administration
Administering Agency
Kansas Building Commission
Code Portal
firemarshal.ks.govState Statute
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Jurisdictions
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ZIP Codes
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Special Zones
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Codes
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Climate Zones
Applicable Codes
Key Codes for Restoration Work
Primary codes for residential restoration projects in Kansas
| Code Type | Current Edition | Effective Date | Base Code | Status | Actions |
|---|---|---|---|---|---|
International Building Code Commercial & Multi-Family | IBC Local Adoption | Jan 1, 2024 | IBC 2021 w/ amendments | Current | View Details |
International Existing Building Code Commercial & Multi-Family | IEBC Local Adoption | Jan 1, 2024 | IBC 2021 w/ amendments | Current | View Details |
International Energy Conservation Code (where locally adopted) Energy Efficiency Standards | IECC 2018 | Jan 1, 2018 | IECC 2018 w/ amendments | Current | View Details |
International Energy Conservation Code (Commercial) Energy Efficiency Standards | IECC-C Local Adoption | Jan 1, 2024 | IECC 2021 w/ amendments | Current | View Details |
International Energy Conservation Code (Residential) Single-Family & Townhomes | IECC-R Local Adoption | Jan 1, 2024 | IRC 2021 w/ amendments | Current | View Details |
International Residential Code Single-Family & Townhomes | IRC Local Adoption | Jan 1, 2024 | IRC 2021 w/ amendments | Current | View Details |
Kansas Fire Prevention Code (state buildings, schools, healthcare) Commercial & Multi-Family | KFPC Current | Jan 1, 2020 | IBC 2021 w/ amendments | Current | View Details |
National Electrical Code 2020 (NFPA 70) Building Requirements | NEC 2020 | Jan 1, 2020 | NEC 2018 w/ amendments | Current | View Details |
International Building Code
Commercial & Multi-Family
IBC Local AdoptionDetails
International Existing Building Code
Commercial & Multi-Family
IEBC Local AdoptionDetails
International Energy Conservation Code (where locally adopted)
Energy Efficiency Standards
IECC 2018Details
International Energy Conservation Code (Commercial)
Energy Efficiency Standards
IECC-C Local AdoptionDetails
International Energy Conservation Code (Residential)
Single-Family & Townhomes
IECC-R Local AdoptionDetails
International Residential Code
Single-Family & Townhomes
IRC Local AdoptionDetails
Kansas Fire Prevention Code (state buildings, schools, healthcare)
Commercial & Multi-Family
KFPC CurrentDetails
National Electrical Code 2020 (NFPA 70)
Building Requirements
NEC 2020Details
Effective dates reflect when each code edition was formally adopted by the state. Dates may differ across code types when amendments are adopted in separate rulemaking cycles. Base codes reference the ICC model code edition that serves as the foundation for the state's adopted version. Verify current applicability with your local Authority Having Jurisdiction (AHJ).
Get a jurisdiction-specific code packet
Enter a Kansas ZIP code for exact applicable codes, special zones, and a compliance checklist.
Special Zones
Special Zones
Wind & Hurricane
Kansas Tornado Alley - Statewide Severe Weather Zone
All of Kansas is in the heart of Tornado Alley. State averages 90+ tornadoes per year. Entire state is HIGH tornado risk. Severe thunderstorms, hail, and high winds are frequent. Consider storm shelter/safe room construction per ICC 500, FEMA P-320 (residential), FEMA P-361 (community).
Requirements: Recommend safe room in all new construction. ICC 500 standard for storm shelters. FEMA P-320 residential guidance. FEMA P-361 community guidance. Minimum 3 sq ft per occupant. Interior location preferred. Impact-resistant door. Anchored to foundation. Reinforced concrete, ICF, or manufactured shelter. Mobile home parks may require community shelters. Impact-resistant roofing (Class 4 per UL 2218) reduces hail damage. Continuous load path (roof-to-wall-to-foundation) important. Basic wind speed 115-120 mph per ASCE 7. Greensburg, KS rebuilt with safe rooms after 2007 EF5 tornado.
View sourceWildfire
Kansas Flint Hills and Rangeland WUI Zone
The Flint Hills tallgrass prairie in east-central Kansas and rangeland across western Kansas create WUI conditions where communities border unmanaged grasslands. Prescribed burning is common in the Flint Hills but escaped fires threaten structures. Chase, Morris, Butler, and Lyon counties have designated WUI communities. IWUIC guidelines apply where locally adopted.
Snow & Ice
Kansas Snow Load Zone
Kansas ground snow loads range from 10 psf in southern counties to 25 psf in northwestern counties per ASCE 7-22 Figure 7.2-1. While moderate, blizzard conditions with sustained high winds create significant drift loads. Roof drift design per ASCE 7-22 Section 7.7 is important for agricultural and commercial buildings common in Kansas.
Flood & Coastal
Kansas Major River Flood Zones AE
Kansas has extensive Zone AE designations along the Kansas, Missouri, Arkansas, Republican, and Smoky Hill rivers. The 1951 Kansas River flood remains one of the costliest in US history. Topeka, Lawrence, Manhattan, and Kansas City KS have significant SFHA areas. NFIP requirements per 44 CFR 60.3 apply. Many communities require 1-2 feet of freeboard.
Radon
Kansas EPA Radon Zone 1 — Eastern Kansas
Eastern Kansas counties including Douglas, Shawnee, Riley, Johnson, and Wyandotte fall within EPA Radon Zone 1 with predicted indoor screening levels above 4 pCi/L. Limestone bedrock and glacial deposits in northeastern Kansas are primary radon sources. IRC R324 radon-resistant new construction is strongly recommended. Kansas has one of the highest radon prevalence rates in the US.
Historic Preservation
Kansas Historic Districts (State/Federal)
State and federal historic districts in Kansas. Kansas Historical Society serves as State Historic Preservation Office (SHPO). Notable historic areas include Abilene (Eisenhower), Dodge City, Fort Scott, Lawrence, and many downtown districts.
Requirements: Local Historic Preservation Commission review may be required. Kansas SHPO review for state/federal involvement. Certificate of Appropriateness may be required for exterior changes. Replacement materials should match original appearance. Federal Historic Preservation Tax Credit available (20%). Kansas Historic Rehabilitation Tax Credit available. Secretary of Interior Standards apply for tax credit projects. Contact Kansas Historical Society at (785) 272-8681.
View sourceSeismic
Kansas Induced Seismicity Zone — South-Central
South-central Kansas, particularly Sumner, Harper, and Sedgwick counties, has experienced increased seismicity since 2013 related to wastewater injection from oil and gas operations. The 2014 Harper County earthquake (magnitude 4.9) was the largest instrumentally recorded event in Kansas history. Seismic Design Category B applies per ASCE 7-22 in affected areas.
Geologic
Eastern Kansas Expansive Soil Zone
Eastern Kansas has significant expansive (high-plasticity clay) soils that cause foundation movement. Shrink-swell behavior with moisture changes. Affects Kansas City metro (Johnson, Wyandotte, Leavenworth), Topeka (Shawnee), Lawrence (Douglas), and Flint Hills region (Chase, Lyon, Morris, Wabaunsee, Geary, Riley, Pottawatomie counties).
Requirements: Geotechnical investigation required before foundation design. Soil testing for plasticity index (PI) and liquid limit. Foundation options: pier and beam, post-tensioned slab, structural slab. Maintain consistent soil moisture around foundation. Proper drainage away from foundation CRITICAL. Root barriers may be needed near large trees. Flexible utility connections. Do not plant trees/shrubs too close to foundation. Contact Kansas Geological Survey (KGS) for soils data.
View sourceClimate & Energy
Climate Zones
IECC Climate Zones in Kansas
4AMixed-Humid
Mixed-Humid
moist
5ACool-Humid
Zone 5A - Cool Humid
moist
Energy Code Requirements
IECC 2018 - Residential Insulation Minimums
| Component | Zone 4A | Zone 5A |
|---|---|---|
Wood Frame Wall | 20.0 | 20.0 |
Mass Wall | 8.0 | 13.0 |
Floor | 19.0 | 30.0 |
Basement Wall | 10.0 | 15.0 |
Slab Perimeter | 10.0 | 10.0 |
Crawl Space Wall | 10.0 | 15.0 |
Window | 0.350 | 0.300 |
Skylight | 0.550 | 0.550 |
Door | 0.350 | NR |
Ceiling Attic | 49.0 | 49.0 |
Legend:
Wood Frame Wall
Mass Wall
Floor
Basement Wall
Slab Perimeter
Crawl Space Wall
Window
Skylight
Door
Ceiling Attic
NR = Not Required
Fenestration Requirements
U-Factor (Max)
0.350
SHGC (Max)
0.40
Ice Barrier
Required
R-Value Requirements (Zone 4A - Most Common)
R-49.0
Ceiling
Attic/Roof
R-20.0
Walls
Wood Frame
R-19.0
Floor
Over Uncond.
R-10.0
Basement
Wall
R-10.0
Slab
Perimeter
NR
Crawlspace
Not Required
Counties
Kansas Counties
105 jurisdictions with code information
Allen County
FIPS: 20001
Standard
7 ZIP codesView
Anderson County
FIPS: 20003
Standard
6 ZIP codesView
Atchison County
FIPS: 20005
Standard
6 ZIP codesView
Barber County
FIPS: 20007
Standard
7 ZIP codesView
Barton County
FIPS: 20009
Standard
5 ZIP codesView
Bourbon County
FIPS: 20011
Standard
7 ZIP codesView
Brown County
FIPS: 20013
Standard
8 ZIP codesView
Butler County
FIPS: 20015
Standard
16 ZIP codesView
Chase County
FIPS: 20017
Standard
5 ZIP codesView
Showing 9 of 105 jurisdictions.
Inspection Process
Inspection Process
Standard permit inspection sequence for Kansas residential projects
1
Foundation Inspection
After excavation, forms, and reinforcement in place
If applicable
2
Rough Framing Inspection
After framing complete, before insulation or covering
3
Roof Sheathing Inspection
After roof deck complete, before ice barrier or underlayment
Before roofing
4
Ice Barrier / Dry-In Inspection
After ice barrier and underlayment installed, before final roofing material
5
Insulation / Energy Inspection
After insulation installed, before drywall or covering
Energy code compliance
6
Window/Door Installation Inspection
After installation, before exterior trim/siding covers flanges
Final Inspection
After all work complete
CO Issued
Important Notes
24-Hour Notice: Schedule inspections at least 24 hours in advance.
Permit Card: Must be posted and visible from street.
Re-Inspection Fees
- First re-inspection
- Often free
- Second re-inspection
- $50-100
- Additional re-inspections
- Varies
* Fees vary by jurisdiction
Contacts & Resources
Kansas State Fire Marshal
State Building Code Authority
Kansas Housing Resources Corporation (KHRC)
Topeka
Kansas Historical Society / State Historic Preservation Office
State Building Code Authority
Kansas Division of Emergency Management
Topeka
Unified Government of Wyandotte County/Kansas City, KS
Kansas City
City of Overland Park Planning & Development Services
Overland Park
Contractor Licensing
Contractor licensing in Kansas is managed at the state level. Contact the state licensing board or visit your local building department for specific requirements and license verification.
Data last verified: February 2026 · Always verify requirements with the local building department.