Permitting Authorities / City of Lenexa - Building Codes Division
Do you need a permit to replace a roof in Lenexa, KS?
Adopted codeCity of Lenexa - Building Codes Division
Yes — a permit is required to replace a roof in Lenexa, KS, issued by City of Lenexa - Building Codes Division. The city's Residential & Commercial Permit Application lists "Re-roof" as a distinct project-type checkbox for both residential and commercial projects, and its fee table states: "Commercial re-roofing permits refer to table B1, minimum $100. Residential re-roofing permits refer to table B2, minimum $50." Residential re-roofing fees are calculated from Table A2, which lists "Re-roofing: Refer to Table B2 - minimum $50.".
Jurisdiction
City of Lenexa, Kansas
Jurisdiction type
city
Address
17101 W. 87th St. Pkwy., Lenexa, KS 66219
Contact
- url: https://www.lenexa.com/Business-Development/Design-Construction/Building-Codes
- phone: 913-477-7725
- email: [email protected]
Permit portal
Roofing permit required
Required
Contractor registration required
Registration details
- license: The city's Residential Asphalt Roofing Code Summary states under "Contractors Licensing": "The homeowner may obtain the permit; however, if the homeowner is hiring a contractor to perform the work then the contractor is required have a valid Johnson County Contractor License and City of Lenexa Business License. All roofing contractors are also required to be current on the State of Kansas Roofer's Registration."
Permit process note
The city's Residential & Commercial Permit Application lists "Re-roof" as a distinct project-type checkbox for both residential and commercial projects, and its fee table states: "Commercial re-roofing permits refer to table B1, minimum $100. Residential re-roofing permits refer to table B2, minimum $50." Residential re-roofing fees are calculated from Table A2, which lists "Re-roofing: Refer to Table B2 - minimum $50."
Inspection requirements
The city's Residential Asphalt Roofing Code Summary instructs: "For re-roof permits please schedule an 'in-progress' inspection for the below items accordingly," covering: an ice barrier (Section R905.1.2) of at least two cemented underlayment layers or a self-adhering polymer-modified bitumen sheet extending not less than 24 inches inside the exterior wall line (36 inches measured along the slope on roofs 8:12 or steeper); asphalt shingles fastened to solidly sheathed decks (Section 905.2.1); underlayment installed over the drip edge at eaves and under it at rakes (Section 905.2.8.5); a tear-off of all existing roof coverings before applying new roofing where the existing covering is water-soaked or deteriorated, is slate/clay/cement/asbestos-cement tile, or already has two or more layers (Section R908); replacement of rusted, damaged, or deteriorated flashing, edging, outlets, or vents, with aggregate surfacing materials not reinstalled (Section 908.5); and attic/rafter space ventilation of not less than 1/150 of the vented area (reducible to 1/300 with 40-50% of vents in the upper portion) (Section R806).
Adopted code
The city's Building Codes page states that the Unified Development Code and Ordinance 5890 adopt: the 2018 International Building Code, 2018 International Plumbing Code, 2018 International Mechanical Code, 2018 International Fuel Gas Code, 2018 International Residential Code, 2018 International Fire Code, 2018 International Existing Building Code, 2017 National Electrical Code, 2012 International Energy Conservation Code, and 2018 International Swimming Pool & Spa Code. The city's Residential Asphalt Roofing Code Summary confirms roof coverings "shall be applied in accordance with all applicable provisions of the 2018 International Residential Code and the manufacturer's installation instructions."
Drip edge
Required — "Drip Edge (Section 905.2.8.5): Underlayment shall be installed over the drip edge along eaves and under the drip edge along rake edges" (City of Lenexa, Residential Asphalt Roofing - Code Summary, rev. 11/2024). The document states roof coverings "shall be applied in accordance with all applicable provisions of the 2018 International Residential Code," of which Section R905.2.8.5 is the drip-edge mandate this summary is keyed to. About drip edge
Ice & water shield
Required — "Ice Barrier Underlayment (Section R905.1.2): Ice barrier shall consist of not fewer than two layers of underlayment cemented together, or a self-adhering polymer-modified bitumen sheet shall be used in place of normal underlayment and extend from the lowest edges of all roof surfaces to a point not less than 24 inches inside the exterior wall line of the building. On roofs with slope equal to or greater than eight units vertical in 12 units horizontal the ice barrier shall also be applied not less than 36 inches (914 mm) measured along the roof slope from the eave edge of the building. Note: Many manufacturers require ice barrier underlayment in valleys" (City of Lenexa, Residential Asphalt Roofing - Code Summary, rev. 11/2024). About ice & water barrier
Mid-roof inspection
Required — "For re-roof permits please schedule an 'in-progress' inspection for the below items accordingly" (City of Lenexa, Residential Asphalt Roofing - Code Summary, rev. 11/2024), covering: ice barrier underlayment (Section R905.1.2), asphalt-shingle sheathing requirements (Section 905.2.1), drip edge (Section 905.2.8.5), tear-off conditions for reroofing (Section R908), reinstallation of flashings/vents/edgings (Section 908.5), and attic/rafter ventilation (Section R806).
Impact-resistant roofing
Not required — Ordinance No. 5890 (City of Lenexa, Kansas, passed and signed by the Mayor June 21, 2022, effective August 1, 2022) repeals and replaces Chapter 4-8 of the Lenexa City Code in full and was read cover to cover (115 pages). Its Article 4-8-C "International Residential Code" adopts the 2018 International Residential Code (fourth printing), including Appendixes C, G, H, K, P and Q, by reference, and Sections 4-8-C-1 through 4-8-C-33 (pages 39-58 of the ordinance) are the complete list of local amendments to it -- covering title and administration, two-family dwelling separation (R302.3), mechanical ventilation (R303.4), temporary toilets, driveways, townhouse sprinklers, smoke and carbon-monoxide alarms, building addresses, storm protection, physical security, footing and foundation design, retaining walls, water discharge, concrete floors, top-plate notching, energy-code compliance and testing, fuel-burning appliance rooms, electrical systems, and basement receptacles. None of the 33 items amends IRC Chapter 9 (Roof Assemblies, R902-R908), and no other part of the ordinance's other code articles (International Building, Fire, Property Maintenance, Energy Conservation, Plumbing, Fuel Gas, Mechanical, Existing Building, or Swimming Pool and Spa Code articles) touches residential roof covering either. No UL 2218, Class 4, or impact-resistance provision appears anywhere in the ordinance.
Wind design criteria
115 mph wind design speed, topographic effects No, special wind region No, windborne debris zone No, seismic design category A (Table R301.2(1) repealed and replaced by Section 4-8-C-3, "Climatic and Geographic Design Criteria," Article 4-8-C International Residential Code, City of Lenexa Code; 2018 IRC adopted by Ordinance No. 5696). Ground snow load 20 psf, weathering severe, frost line depth 36 inches, winter design temp 6°F, ice barrier underlayment required Yes, air freezing index 1000, mean annual temp 55°F.
Sales & use tax
Lenexa's combined sales tax rate is 9.35% (KS state 6.5% + Johnson County 1.475% + City of Lenexa 1.375%). KDOR Pub. 1700 lists 20 CIDs, most raising the rate to 10.35% within specific addressed parcels (the Restaurant Row CID reaches 11.35%). Per Kansas DOR Pub. KS-1525 "Sales & Use Tax for Contractors, Subcontractors, and Repairmen" (Rev. 7-29-25): "Services performed to install or apply tangible personal property are exempt from sales tax when the services involve the original construction, reconstruction, restoration, remodeling, renovation, repair or replacement of a residence" -- so residential re-roof LABOR is exempt, but materials are not: contractors "are considered to be the final user or consumer of the materials they install for others, and must pay Kansas sales or use tax on them" at the time of purchase (or self-assessed compensating use tax on out-of-state materials, via Form CT-10U, per the same publication's Compensating Use Tax section). Commercial re-roof labor is taxable ("roofing, siding and guttering" is listed as a taxable labor service on commercial projects). Pub. KS-1525 describes only two collection points for contractor materials tax -- retailer sale or self-assessed use tax -- with no mechanism tied to building-permit issuance anywhere in the publication; Kansas sales/use tax is administered centrally by KDOR, not self-collected by home-rule cities as in Colorado.
The permitting authority for the City of Lenexa, Kansas, a Johnson County suburb in the Kansas City metropolitan area. The Building Codes Division, within the Department of Community Development, reviews plans, issues building permits, and performs inspections for residential and commercial construction within city limits, and publishes roofing-specific code guidance covering permit and inspection requirements for re-roofing.
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Sources
- lenexa.com verified 2026-07-31
- lenexa.com verified 2026-07-18
- ksrevenue.gov verified 2026-07-18
- online.encodeplus.com verified 2026-07-18
- lenexa.com verified 2026-07-17
- cdn.lenexa.com verified 2026-07-17