Permit Requirements for
Home Additions in KC Metro.

If you live in the Kansas City metro and you’re thinking about adding square footage to your home, the permit question is not whether — it is which jurisdiction, what does that jurisdiction require, and how long will the review take. The KC metro is fragmented across two states and roughly fifteen municipalities Tessera regularly works in, and every one of them has its own portal, its own contractor licensing structure, and its own review timeline.

This guide walks through the major KC-metro municipalities and what you should expect from each on a residential home addition.

Why permits matter on additions specifically

Additions almost always require permits. They typically involve:

• New foundation, frost footings, or pier work
• Structural framing — load-bearing changes to the existing home
• New plumbing supply, drain, vent, gas
• New electrical service or sub-panel work
• HVAC additions or extensions
• New roofing tied into the existing roof system
• Exterior tie-in (siding, windows, doors)
• Stormwater impact (new impervious surface)
• Possibly setback, lot-coverage, or zoning constraints

Each of those triggers an inspection. Skipping the permit on an addition is not a small thing — it shows up at resale, can void homeowner insurance on the addition (if a fire or storm damages an unpermitted structure, your carrier may decline the claim), and creates a code-enforcement liability that follows the property.

Pull the permit. Always.

The two-state, many-city reality

The KC metro spans Missouri (Jackson, Clay, Platte, Cass counties) and Kansas (Wyandotte, Johnson counties). Each state has its own building code adoption cycle, contractor licensing structure, and lien law. Within each state, individual cities adopt their own codes and run their own permit offices.

Practically: a contractor licensed in Olathe is not automatically licensed in Lee’s Summit. Permit fees, review timelines, and required documentation vary city to city.

Kansas City, Missouri (KCMO)

The largest single municipality in the metro and the one most KC-area homeowners think of when they hear “Kansas City.”

• Office: City Planning & Development — Permits Division
• Portal: Compass KC (online plan and permit submission)
• Contractor licensing: General Contractor license required; issued through Compass KC. The contractor’s qualified individual must hold a separate Certificate of Qualification per trade.
• Fees: GC license: $55 application + $167 issuance, four-year renewal cycle.
• Permit fees: Valuation-based — calculated on the declared project cost. Compass KC has a published fee schedule.
• Contact: cdlicensing@kcmo.org · (816) 513-1500 ext 1 opt 2
• Typical review time: Residential remodels 1 to 3 weeks. Structural additions 3 to 6 weeks if engineered drawings are submitted. Historic district properties (Westside, Northeast, parts of Brookside) require additional historic-preservation review.

KCMO is generally responsive on residential additions when documentation is complete. The single most common rejection cause: missing structural drawings or no licensed sub identified on the application for trade work.

Kansas City, Kansas (KCK / Wyandotte County)

Operates under the Unified Government of Wyandotte County and KCK.

• Office: Wyandotte County Neighborhood Resource Center — Building Inspection
• Portal: Accela Citizen Access at mauwi.wycokck.org
• Contractor licensing: Required. Trades require master licenses (electrical, plumbing, HVAC).
• Process: Pre-application meeting strongly encouraged for any addition over 200 sf or any project crossing multiple departments. Multi-department review (building, fire, zoning, stormwater, public works) on substantial additions.
• Typical review time: Routine residential remodels often 1 to 3 weeks. Larger additions with multi-department review can take 90 to 120 days.

The pre-application meeting is worth taking seriously in KCK. Showing up to plan review with your scope already vetted by a department contact significantly reduces rejection cycles.

Overland Park, KS

• Office: Building & Safety Division
• Portal: ePLACE (online permit system)
• Contractor licensing: Johnson County license required, plus Overland Park-specific permit registration.
• Phone: (913) 895-6225
• Typical review time: Residential remodels 7 to 14 business days. Larger additions 2 to 4 weeks with engineered drawings.

Overland Park’s review process is tighter than some neighboring cities. Plans submitted with incomplete dimensions, missing electrical/plumbing on the scope, or no engineering on load-bearing changes will get rejected.

Olathe, KS

Olathe is in Johnson County and uses the county’s contractor licensing structure.

• Process: Johnson County contractor license is the gating credential.
• Owner exception: A homeowner acting as their own GC on a single-family residence (their primary residence) can file directly without a contractor license — the only KC-metro city we know of with this carve-out.
• Portal: Johnson County Online Permitting (customer portal). All permits since January 2020 must be submitted online.
• Typical review time: Residential permits typically issue in 7 to 10 business days when documentation is complete.

Olathe’s online portal is one of the cleaner systems in the metro. The 7-to-10-business-day target is realistic for straightforward residential additions.

Lenexa, KS

• Office: City of Lenexa Building Codes (under Johnson County contractor licensing umbrella)
• Process: Johnson County contractor license is the credential. Lenexa-specific permit application form on top.
• Typical review time: 7 to 14 business days for residential remodels.

Lee’s Summit, MO

One of the more documented permitting jurisdictions in the metro.

• Office: Development Services Department (City Hall, first floor) · (816) 969-1200
• Portal: CityView Portal — devservices.cityofls.net
• Contractor licensing classes: Class A (commercial), Class B (large-scale), Class C (Residential Contractor — single-family, duplex, townhouse), Class D (trade — HVAC, plumbing, electrical).
• Insurance requirement: Lee’s Summit requires the GC’s general liability policy to list the City of Lee’s Summit as Certificate Holder with $300k GL / $300k Property Damage / $100k Contractual minimum coverage.
• Typical review time: Residential additions 2 to 4 weeks with complete documentation.

Lee’s Summit is one of the few metros that requires the city to be named as additional insured on the contractor’s GL policy. A contractor without that endorsement on file cannot pull permits in Lee’s Summit, even if licensed elsewhere.

Liberty, MO

Liberty has its own Code Enforcement office and permit process. Documentation requirements are roughly comparable to other Clay County municipalities — engineered drawings on structural changes, licensed trades identified, stormwater plan if new impervious surface exceeds local thresholds.

Independence, MO

Independence operates a tiered trade-license system (Master/Craftsman). Master/Craftsman licenses from Independence are recognized as equivalent in some neighboring jurisdictions, including Lee’s Summit, which simplifies cross-city work for trades licensed in Independence.

Blue Springs, MO

• Office: Permit & Application Center, Blue Springs City Hall
• Process: Electronic submission, mail, or in-person at City Hall.
• Typical review time: Comparable to Lee’s Summit and other Jackson County municipalities — 2 to 4 weeks for additions.

Raytown, MO

• Office: City of Raytown Building Permits
• Restriction: Only licensed contractors may pull permits in Raytown — no homeowner-as-GC exception. Trade contractors (electrical, plumbing, mechanical) must hold a “Master Craftsman License” in addition to a general license.

Belton, MO

Belton operates a standard residential permit process under Cass County. Permit-fee specifics and exact timelines vary; verify with the Belton building office during your project’s pre-construction phase.

Shawnee, KS

• Office: City of Shawnee Community Development
• Codes adopted: As of April 1, 2026, Shawnee adopted the 2024 IBC, IRC, and other International codes. Plans should reference the 2024 IRC for residential additions.
• Contractor licensing: Operates under Johnson County contractor licensing.

Leawood, KS

• Office: Leawood Codes Administration
• Process: Generals and subs must be licensed by both Leawood and Johnson County.
• Permit lifecycle: Permits expire 365 days from issuance — a real consideration if your project is staged or paused.
• Typical review time: 2 to 4 weeks for residential additions with engineered drawings.

Leawood’s dual-license requirement (city + county) is the strictest in Johnson County and worth confirming on any contractor before you sign.

Common reasons for permit delay or rejection

Across all these jurisdictions, the consistent failure modes:

1. Incomplete drawings — missing dimensions, missing electrical or plumbing on scope, no engineering signature on load-bearing changes.
2. No licensed sub identified on the application for trade work (plumbing, electrical, HVAC).
3. Missing site survey for additions or driveway changes.
4. Setback or zoning conflict — particularly historic districts (KCMO) and Westwood KS.
5. Stormwater management not addressed when new impervious surface exceeds local thresholds (commonly 1,000 sf).
6. Inspection failures during construction — framing issues, missing fire-blocking, improper ventilation.

A pre-application meeting in any of these jurisdictions, where available, almost always pays for itself in avoided rejection cycles.

What homeowners should ask their contractor

Before signing an addition contract, confirm:

• Is the contractor licensed in your specific municipality? A general license in KCMO does not automatically transfer to Lee’s Summit or Leawood.
• Do they carry the insurance the municipality requires? Lee’s Summit’s $300k GL / Additional Insured requirement is a real constraint.
• Who is pulling the permit — the GC, or are you as the homeowner expected to pull it? GC-pulled permits are standard practice; homeowner-pulled permits shift liability for code compliance onto you.
• What is the assumed review timeline in this jurisdiction? A contractor who doesn’t know the answer is one whose schedule will slip during permit review.
• What happens if the plans are rejected? Revisions, re-submittal, and re-review add 2 to 4 weeks. Honest contractors budget for this on first submittal.

What we do on the permit side

We handle permits on every Tessera project where they are required. We pull them, we walk inspections, and we share the review timeline with you in writing before signing. If a project’s review timeline puts a project outside your acceptable window, you find out before signing the contract — not after demo starts.

If you want a quote that addresses jurisdiction-specific permit requirements for your address, the contact page form takes about two minutes. We respond within minutes during business hours.