Broad rolling western Missouri cropland near Kansas City with dark prairie soil, an osage-orange hedgerow and standing bur oaks.
Jackson County City-adopted code, city inspection

Barndominium Builders in Kansas City, MO

Kansas City is legally a four-county city. The Census Bureau's own place-part figures put 317,383 of its residents in Jackson County, 143,075 in Clay, 55,477 in Platte and 97 in Cass — legally four counties, functionally three. It is also, unusually for a place this size, a genuine land market: 516,032 people spread over 314.5 square miles at 1,641 people per square mile, with a real rural fringe north of the Missouri River in Platte and Clay and open ground on the southern and eastern edges. Inside the city line one authority permits every build — the City's own Chapter 18 building and rehabilitation code, administered by the director of city planning and development — no matter which of the four counties the parcel sits in. But the county still decides what your parcel is assessed at, which recorder of deeds holds your deed, and, under the City's own private sewage disposal code, which septic standard your system may be designed to. No single county classification is stated on this page, because Kansas City does not have one: Jackson and Clay are charter counties and Platte and Cass are first-classification counties, and each of those four is a different statutory regime the moment you cross the city line.

Kansas City at a glance

County
Jackson County
Population
516,032
ZIP codes
64108, 64110, 64114, 64116, 64118, 64119, 64129, 64131, 64133, 64134, 64138, 64145, 64147, 64151, 64152, 64153, 64155, 64157, 64164, 64165
Site visits
Same-week site visits anywhere inside the city line, from the Platte County fringe north of the river down to the Cass County boundary
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Building conditions in Kansas City

Missouri sets no residential building code and no statewide way of adopting one, so the first question on any parcel is not what the code says — it is whether there is one. Only counties of the first and second classification may adopt a building code at all, and classification is set by assessed valuation rather than population, so a small county can hold the power while a much larger one does not. Zoning is a separate power with its own answer, granted only after a vote of the people and repealable by another. What changes from one jurisdiction to the next is whether the work is inspected, who issues the permit, what that office charges, how the parcel is zoned, and the design figures your drawings have to satisfy.

Build conditions for Kansas City , Jackson County, Missouri : design wind speed 115 mph. BUILD CONDITIONS KANSAS CITY, MOJackson CountyCITY-ADOPTED CODEDESIGN WIND SPEED115 mphFrom Kansas City's own amended Table R301.2(1), printed in the ordinance text at KCMO Code §18-57. The same row records topographic effects: No, special wind region: No and windborne debris…ZONING · R-80 (RESIDENTIAL 80) AND AG-R (AGRI…R-80: 80,000 sq ft (about 1.84 acres…R-80 is the lowest-density base residential district in the city(Zoning and Development Code Table 110-2, 88-110-06-B); a detached…ARTERIAL STREET IMPACT FEE, SPLIT BY THE MISS…$715.00 per single-family detached d…Code of Ordinances ch. 39. The fee is only due where the parcelfalls inside one of the benefit districts defined by § 39-6 — five…WHO ISSUES THE PERMITCity of Kansas City, Missouri — City…KCMO Code § 18-1(b): the director of city planning and developmentis the building official, and every 'administrative authority',…
Build conditions for Kansas City, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
Four counties, one city — and one of them holds 97 people
Kansas City legally spans four Missouri counties. The Census Bureau's place-part records for the city put 317,383 residents in Jackson County, 143,075 in Clay County, 55,477 in Platte County and 97 in Cass County, summing to the city's 516,032. So the city is legally four-county and functionally three-county: the Cass County portion is a sliver on the southern edge with fewer people in it than a single apartment block. Which county a parcel sits in does not change who issues the building permit, but it does change who assesses the property, who records the deed, and which county's septic standards the city's own code will accept.

U.S. Census Bureau, Vintage 2024 Subcounty Population Estimates, Missouri file sub-est2024_29.csv, SUMLEV 157 (place part within county), place FIPS 2938000; county names cross-checked against st29_mo_cou2020.txt — both fetched from www2.census.gov, 6 September 2026

The city permits, whichever county you are in
There is no county building department with jurisdiction inside Kansas City. The city's own building and rehabilitation code, Chapter 18 of the Code of Ordinances, applies across the whole municipality; § 18-1(b) makes the director of city planning and development the building official and § 18-16(a)(1)a makes it unlawful to construct, enlarge, alter, move, raise, shore or demolish a structure without a permit first. The two statutes on the other side of the line agree. RSMo 64.180.3, effective 28 August 2001, says of a county building code adopted under RSMo 64.170 to 64.200 that 'the regulations adopted shall be applicable to the unincorporated territory of the county' — that is Platte and Cass. Mo. Const. Art. VI § 18(c) vests a charter county's municipal-type legislative power 'in the part of the county outside incorporated cities', extendable inside cities only by a separate ballot proposition defining the power and its financing — that is Jackson and Clay.

KCMO Code of Ordinances §§ 18-1(b), 18-2(b), 18-16(a)(1)a (Ord. No. 200418, § 1, 6-18-20); RSMo 64.180 (RSMo 1939 § 14943, A.L. 1945, A.L. 2001 S.B. 86, effective 28 Aug 2001); Mo. Const. Art. VI § 18(c), Const. of 1945 (amended November 3, 1970)

Kansas City's own Table R301.2(1), in full
The city replaces the model code's climatic and geographic design table with its own. Ground snow load 20 psf; wind speed 115 mph; topographic effects No; special wind region No; windborne debris zone No; seismic design category A; weathering Severe; frost line depth 36 inches; termite moderate to heavy; winter design temperature 6°F; ice barrier underlayment required Yes; flood hazards see Code of Ordinances ch. 28; air freezing index 1000 F-days; mean annual temperature 54.2°F. Its Manual J criteria give elevation 909 feet, latitude 39°N, winter heating 4°F and summer cooling 96°F. The 36-inch frost line is the number that costs money on a post-frame building — it sets the depth of every post hole and every pier, and it is 12 inches deeper than the City of Springfield's published figure at the other end of the state.

KCMO Code of Ordinances § 18-57, amended Table R301.2(1) (Ord. No. 200418, § 1, 6-18-20; Ord. No. 220364, § 1, 10-13-22), read from the city's codified ordinances; Springfield comparison from the City of Springfield 2018 IRC adoptive ordinance, Table R301.2(1)

400 square feet is the licence line; 200 square feet is the permit line
Two thresholds decide how a detached shop is handled here, and both are unusually low. Under KCMO Code § 18-14(j), anyone who contracts to construct, structurally alter or enlarge a one- or two-family detached dwelling or townhouse 'including detached accessory buildings in excess of 400 square feet in area' must first be licensed as a residential building contractor, or work as a direct employee under that licensee's qualified supervisor, or as a building-trades subcontractor to a licensed residential building contractor holding a valid building permit. Separately, § 18-16(b)(1)a exempts from any building permit at all a one-story detached accessory building used as a tool shed, playhouse, garage, carport or similar use where the projected roof area does not exceed 200 square feet. Any shop worth building clears both lines comfortably. The licence carries its own conditions: § 18-327(b)(2) requires liability insurance with a minimum aggregate limit of $1,000,000.00 per occurrence from a carrier rated A.M. Best B+ V or better and licensed in Missouri; § 18-335 requires the licensed company to have a qualified supervisor holding a Kansas City certificate of qualification; § 18-330 makes licences valid four years.

KCMO Code of Ordinances §§ 18-14(j), 18-16(b)(1)a, 18-326, 18-327(a) and (b)(2), 18-330, 18-335 (Ord. No. 200418, § 1, 6-18-20)

The county still sets your septic standard, inside the city
This is where the four-county fact stops being trivia. Kansas City adopted the 2018 International Private Sewage Disposal Code as Chapter 18 Article VIII, and amended its scope section to read: 'The installation of private sewage disposal systems for one and two family dwellings, where permitted, shall be in accordance with this article. Exception: Private sewage disposal systems designed in accordance with the adopted standards of the county in which the system will be installed.' The city's own ordinance turns, by its own words, on which county the parcel is in. The same section's amended 101.3 bars any private sewage permit on a lot where a public sewer is available — so on a serviced lot the question never arises, and on an unserviced fringe parcel it is the first question to ask.

KCMO Code of Ordinances § 18-142, amending International Private Sewage Disposal Code (2018) §§ 101.2 and 101.3 (Ord. No. 200418, § 1, 6-18-20)

A big-city page about land: 314.5 square miles at 1,641 per square mile
Kansas City holds 516,032 people across 314.515 square miles of land — 1,641 people per square mile, against 4,532 in the City of St. Louis on a tenth of the area. It is physically the largest municipality in Missouri by a wide margin and it still has ground in it. The zoning code proves the point: R-80, the lowest-density base residential district, requires 80,000 square feet — about 1.84 acres — of lot area and of lot area per unit, with 150 feet of lot width; and the AG-R Agricultural-Residential district, written for 'areas of the city on the outer edge of urbanized development', requires 40 acres for a detached house with a 30-foot setback from every property line. A district needing 40 acres per house does not exist in a city with no land in it.

U.S. Census Bureau, Vintage 2024 Subcounty Population Estimates (SUMLEV 162) and 2024 Census Gazetteer places file, ALAND_SQMI for GEOID 2938000, both fetched 6 September 2026; Kansas City Zoning and Development Code Table 110-2 (88-110-06-B) and 88-270-01, 88-270-03-B

Also worth knowing before you build in Kansas City

Cross the city line and you are in one of four different regimes
Kansas City's four counties are not four versions of the same thing. On the Missouri Association of Counties' May 2025 classification list, Jackson and Clay are charter counties — their code and zoning power comes from their own charters under Mo. Const. Art. VI § 18(b)–(c), not from RSMo 64.170 — while Platte and Cass are first-classification counties whose power does come from RSMo 64.170. The state's own county building-code dataset, published by the Missouri Department of Economic Development, recorded four different residential code editions for them: Jackson 2015 IRC, Clay 2012 IRC, Platte 2018 IRC and Cass 2006 IRC. That dataset was last updated 11 August 2021 and its edition columns should be treated as a dated snapshot, not as current law — but the structural point it demonstrates is solid, because RSMo 64.196 only requires a nationally recognised code of 1999 or later vintage, with no review cycle and no state approval. None of it reaches inside Kansas City.

Missouri Association of Counties, 'Missouri Counties by Classification', published May 2025; Missouri Department of Economic Development, 'County Building Codes for Missouri', data.mo.gov dataset iq7s-izvt, last updated 11 August 2021; RSMo 64.170, 64.196; Mo. Const. Art. VI § 18(b)–(c)

Every county Kansas City touches is EPA Radon Zone 1
Only 11 of Missouri's 114 counties sit in EPA Radon Zone 1, the band with a predicted average indoor screening level above 4 pCi/L. All four of Kansas City's counties are among them — Jackson, Clay, Platte and Cass — alongside Andrew, Atchison, Buchanan, Clinton, Holt, Iron and Nodaway. The Kansas City metro and the northwest corner are the state's radon country; the Bootheel, which carries Missouri's severe earthquake demand, is the state's lowest-radon country. EPA's own Missouri sheet says the map 'should not be used to determine if individual homes need to be tested' and that 'all homes should be tested, regardless of zone designation' — so treat it as a design decision to make at slab stage, not a site fact.

U.S. EPA, Map of Radon Zones county-level data (radon_zones-spreadsheet.xls, document number EPA 402/A-16/001; underlying map developed 1993) and the EPA Missouri zone map sheet, epa.gov

What the city charges to permit a house and a shop
Kansas City's residential permit fee is set on construction valuation, and it is materially cheaper than the schedule for everything else. Under § 18-20(b)(2), a one- or two-family detached dwelling permit is $52.00 up to $1,000 of valuation, $58.00 from $1,001 to $2,000, then $58.00 for the first $2,000 plus $4.33 for each additional $1,000 up to $100,000, and $483.00 for the first $100,000 plus $1.41 for each additional $1,000 above that. The corresponding rate on the schedule for other than one- and two-family dwellings is $14.00 per $1,000, more than three times as much. Two administrative points matter more than the rates for a house-plus-shop build: § 18-20(b)(1) requires that separate valuations be computed, separate permits obtained and separate plan review fees paid for each building or structure in an application, and § 18-20(c)(1) charges the initial construction-document review fee only 'for other than one- and two-family dwellings'.

KCMO Code of Ordinances §§ 18-20(b)(1), 18-20(b)(2), 18-20(b)(3), 18-20(c)(1) (Ord. No. 200418, § 1, 6-18-20)

Sprinklers cannot be made mandatory, and the city's code says so
Kansas City's residential code rewrites IRC section R313 to read that a builder of a one- or two-family dwelling or townhouse must offer the purchaser the option, at the purchaser's cost, to install fire sprinklers, and that the purchaser has the right to choose or decline — with the ordinance's own bracketed note that the requirement 'is provided in accordance with, and shall expire in conjunction with, Missouri Statute (RSMO 67.281).' The city also amends R302.2.2 for townhouse common walls under the same statute. RSMo 67.281 is one of the very few things the State of Missouri says about every new house in the state: no county or other political subdivision may deny a purchaser the right to decline a sprinkler system.

KCMO Code of Ordinances § 18-57, amendments to IRC R302.2.2 and R313; RSMo 67.281 (L. 2009 H.B. 103 and S.B. 513; A.L. 2011; A.L. 2014; A.L. 2016 S.B. 732), effective 28 August 2016

The exterior-material rules here reach other building types, not a detached house
Kansas City sorts residential development into building types and hangs its design standards off the type, so this question has to be asked type by type rather than district by district. A detached house is "subject to the lot and building standards of 88-110-06-B (Table 110-2)" and nothing further, and Table 110-2 is minimum lot area, lot area per unit, lot width, front, rear and side setbacks and maximum height — no material, no roof pitch, no eave, no floor area. The building-type-specific standards at 88-110-06-C are where the material rules actually sit, and they run to seven types: zero lot line houses, cottage houses, attached houses, two-unit and semi-attached houses on corner lots, multi-unit houses, colonnade buildings and multi-unit buildings. The detached house is not one of them. That is where a colonnade building's "Cladding must be of brick, stone, or acceptable materials" lives, and where the multi-unit house and the colonnade are told to reflect the scale, roof pitch, material, ingress and fenestration of other residential buildings within 500 feet. The infill residential standards at 88-110-07, which govern development on an infill residential lot, are dimensional too — lot area and width as a percentage of the block face average, setback range, maximum building width, coverage and height — and roof pitch appears there only as a way of measuring storeys. At the rural edge of the city the AG-R Agricultural-Residential district permits a detached house as of right, with a 40-acre minimum lot, a 35-foot height limit and a 30-foot setback from every property line, and no design standard whatever. There is at least one mapped corridor where the answer changes: in the Westport Overlay along Westport Road and Pennsylvania Avenue, Table 3 classes metal as a secondary material, which may be used above the first storey but may not exceed 30 percent of the first-storey façade. The building code adds nothing to this — Chapter 18, Article III amends the 2018 IRC at length and touches Chapter 7 exactly once, to add an exception at R703.7.2 for plaster installed per an approved listing or evaluation report.

Kansas City Zoning and Development Code §§ 88-110-04 (Residential Building Types), 88-110-06-A and -B with Table 110-2, 88-110-06-C (building-type-specific standards, items 1—7), 88-110-07 (Infill Residential Development Standards), 88-270-01 through 88-270-03 (AG-R, Agricultural-Residential District) and 88-285-04-A with Table 3 (Westport Overlay District, Building Composition Standards, Ord. No. 230498, 15 June 2023), read from the codified Zoning and Development Code through the Municode JSON API (productId 14867, job 490581, Supplement 38, codified through Ordinance No. 260478 enacted 21 May 2026), with 88-110-04 and 88-110-06 re-read from an independent second request; and KCMO Code of Ordinances § 18-57 (Adoption of International Residential Code (2018); amendments), whose sole amendment to IRC Chapter 7 is the added R703.7.2 plaster exception (productId 10156, job 483858, Supplement 139, codified through Ordinance No. 260342 enacted 16 April 2026). All read 9 September 2026

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Below the slab

The expensive surprises are in the ground, not the building

What moves a Missouri budget is usually below grade, and which problem you have depends on where in the state you are. Across the Ozarks it is karst: the Department of Natural Resources maps more than sixteen thousand sinkhole points, and what matters there is what is under the slab rather than what the slab sits in. Across the north and centre it is claypan — dense, slow-draining subsoil that perches water above it for months of the year. In the Bootheel it is deep alluvium carrying the highest seismic demand in the state, where the same soils modelled for liquefaction attack post embedment and slab bearing rather than the frame above them. The same ground then decides the septic system, and Missouri does not run that on a percolation test alone: the rule allows a perc test or a soil morphology examination in a profile pit, and the authority reviewing your parcel picks which. Where a drainfield sits near a sinkhole's drainage, perc testing on its own is not permitted at all. Whether that authority is the state or your own county is itself a local question, and it changes what you have to file. So the site work, the foundation and the drainfield get resolved together rather than one at a time. We price the dirt before we price the building.

What we build in Kansas City

All nine services are available in Kansas City. What a build costs depends far more on the parcel than on square footage, so we price against your land rather than publishing a rate card.

Custom Plans

Barndominium floor plans drawn to your parcel and your soil, and to whichever Missouri authority — a county, a city, or none at all — will review them.

Barndominium Kits

Barndominium shell packages delivered to your Missouri land, drawn to the criteria your own county or city publishes — because the state publishes none.

Turnkey Builds

Start to finish barndominium construction in Missouri: the permits that genuinely apply, site work, shell and interior finish, under one contract.

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What a build looks like

Three stages every Kansas City project passes through, from a raw parcel to a finished home. Site work first, because that is where the budget is decided.

Aerial view of an undeveloped rural lot with cleared grass, a oak and hickory treeline with a few loblolly pines, and a pale gravel access track.
Stage one

The parcel

Zoning, setbacks, flood zone and utility access get checked before anything is drawn.

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the submittal works through whichever office issues the permit where you are building.

A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Stage three

Frame to finish

Shell erected and dried in, then systems, insulation and interior finish through to CO.

Those are the rules where you are building in Kansas City. Tell us what you want to build and we will draw it to them.

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Where we build around Kansas City

Jackson County and the rural land around it. The buildable acreage for a project this size usually sits outside the city limits, which is frequently what changes who issues your permit.

The Kansas City service area, including the rural acreage outside the built-up edge, which is where the parcels big enough for a build like this usually sit. The map marks the territory we build in. It is not a branch location, and there is no office at this pin.

Keep reading

The questions that usually come next once you know what Kansas City allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and by size, with a calculator built on the same figures.

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Is It Legal in Missouri?

Classification, zoning, the HOA gate, and why "nonresidential farm building" does not cover a home.

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How Long Does It Take?

Census build-duration data, and what actually sets the permit clock where you are building.

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Nearby areas we build in

Others we cover nearby, and they are not interchangeable. One may be a county with an adopted building code, another a county with no legal authority to have one, another a city that permits inside its own limits whichever county the land sits in. So the office that issues the permit, whether anyone inspects the work at all, the fees, the zoning and the design figures can differ from one card to the next — sometimes across a single property line.

Jackson County

Jackson County
Clay County

Clay County
Platte County

Platte County
Cass County

Cass County

Building in Kansas City: common questions

8 questions we get asked most often about building in Kansas City. If yours is not on the list, ask it directly.

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Kansas City is in four counties. Who actually issues my building permit?
The City of Kansas City does, wherever inside the city line your parcel is. Chapter 18 of the city's Code of Ordinances is the building and rehabilitation code for the whole municipality; § 18-1(b) makes the director of city planning and development the building official, and § 18-16(a)(1)a makes it unlawful to build without a permit from that official. No county building department has jurisdiction inside the city, and the reason is in two different instruments because Kansas City's four counties are two different kinds of county. For Platte and Cass, which are first-classification counties, RSMo 64.180.3 limits a county building code adopted under RSMo 64.170 to 64.200 to 'the unincorporated territory of the county'. For Jackson and Clay, which are charter counties and sit outside the classification system entirely, Mo. Const. Art. VI § 18(c) vests that legislative power 'in the part of the county outside incorporated cities' unless the county's voters have approved a separate proposition extending a specific, defined power inside municipalities. Either way, the city line is the boundary.
So does it matter at all which county I am in?
Yes — just not for the building permit. Three things change with the county. First, assessment: RSMo 137.115 requires the assessor in each county to list and value all taxable real property annually, so your assessed value and your tax bill come from Jackson, Clay, Platte or Cass, not from the city. Second, your deed: RSMo 59.010 provides that 'there shall be an office of recorder in each county in the state', and the recorder for your parcel's county is the one holding the record. Third, and least expected, septic: Kansas City adopted the 2018 International Private Sewage Disposal Code and amended its scope section to add an exception for 'private sewage disposal systems designed in accordance with the adopted standards of the county in which the system will be installed'. That is the city's own ordinance turning on the county line.
Can you really buy building acreage inside Kansas City?
Yes, which is unusual for a city of half a million. Kansas City covers 314.515 square miles of land and holds 516,032 people — 1,641 per square mile, against 4,532 in the City of St. Louis. Much of the northern fringe in Platte and Clay is still open, and the zoning code is written for it: R-80, the lowest-density base residential district, requires 80,000 square feet of lot area — about 1.84 acres — and 150 feet of lot width, and permits a detached house as-of-right along with Agriculture, Crop; and the AG-R Agricultural-Residential special-purpose district under 88-270 is written expressly for 'areas of the city on the outer edge of urbanized development', permitting detached houses, orchards, crop and animal agriculture, agricultural services and stables without development plan approval — at a 40-acre minimum lot area for a detached house and a 30-foot setback from every property line. What district a given parcel carries has to be checked on the zoning map before you buy; the difference between 1.84 acres and 40 acres is the whole deal.
Do I need a licensed contractor to put up a detached shop here?
Almost certainly, and the trigger is lower than people expect. KCMO Code § 18-14(j) requires anyone who contracts to construct, structurally alter or enlarge a one- or two-family detached dwelling or townhouse — 'including detached accessory buildings in excess of 400 square feet in area' — to be licensed as a residential building contractor, or to be working as a direct employee under that licensee's qualified supervisor, or as a building-trades subcontractor to a licensed residential building contractor holding a valid building permit. Four hundred square feet is a 20-by-20 building. There is a narrow owner route: § 18-14(k)(1) lets a permit issue to the bona fide owner of a single-family dwelling used exclusively for living purposes, including its usual accessory buildings, provided the owner occupies it and the owner and immediate relatives personally purchase all material and perform all labour. Separately, § 18-16(b)(1)a exempts a one-story detached accessory building of 200 square feet or less of projected roof area from needing a building permit at all — that is a garden shed, not a shop.
What design numbers does Kansas City actually use?
The city publishes its own table, so there is no guessing and no need for a state figure — Missouri has no statewide residential code and no statewide design figures. Kansas City's amended Table R301.2(1) at § 18-57 gives ground snow load 20 psf, wind speed 115 mph, seismic design category A, weathering Severe, frost line depth 36 inches, termite moderate to heavy, winter design temperature 6°F, ice barrier underlayment required, air freezing index 1000 F-days and mean annual temperature 54.2°F, with topographic effects, special wind region and windborne debris zone all answered No. The 36-inch frost line is the number to design around on a post-frame building, because it sets the depth of every post hole and pier. One honest wrinkle: on current mapped values the USGS seismic service returns category B for Kansas City on ASCE 7-16 at Site Class D, one step above the A the city's adopted 2018-edition table prints. The permit is issued against the city's figure; both are worth knowing, and neither makes seismic a driver on a Kansas City house.
Is there an agricultural exemption for a barn-style building in Kansas City?
No, and this is the most common misunderstanding people bring from the surrounding counties. Missouri's agricultural exemption lives in the county planning-and-zoning enabling acts — RSMo 64.620(2), 64.890(2) and 64.090(2) — and it exempts farm buildings 'used for such purposes', meaning the raising of crops, livestock, orchards or forestry. It is an exemption from county zoning, it does not reach a county building code, and it does not reach inside a city at all: Kansas City's zoning power comes from RSMo 89.020, which empowers the legislative body of all cities, towns and villages without any such carve-out. Inside the city, agriculture is handled as a permitted use in the zoning tables rather than as an exemption from them — Agriculture, Crop is permitted as-of-right in R-80, Agriculture, Animal is permitted subject to Code of Ordinances ch. 14, and AG-R permits both without development plan approval. But a dwelling is a dwelling: living in the building makes it a residence, and Chapter 18 applies to it in full.
What will the city charge me to permit a house with a detached shop?
Kansas City prices permits on construction valuation. Under § 18-20(b)(2) a one- or two-family detached dwelling permit is $52.00 up to $1,000 of valuation, $58.00 from $1,001 to $2,000, then $58.00 for the first $2,000 plus $4.33 per additional $1,000 to $100,000, and $483.00 for the first $100,000 plus $1.41 per additional $1,000 above that. The structural point for a house-plus-shop build is § 18-20(b)(1): separate valuations are computed, separate permits obtained and separate plan review fees paid for each building or structure in the application — a detached shop is its own permit, not a line on the house permit. On top of that, if the parcel falls inside one of the arterial street impact fee benefit districts under Code of Ordinances ch. 39 — five north of the Missouri River and three south — § 39-3(a)(1) blocks the residential building permit until the fee is paid: $715.00 per single-family detached dwelling in the North Service Area and $706.00 in the South Service Area, both after the 50 percent discount factor the ordinance applies. Whether a given address sits in a benefit district has to be checked with the city.
Kansas City is in Kansas, isn't it?
No — and there are two different cities with almost the same name, in two different states, which trips up more land buyers than any other fact on this page. Kansas City, Missouri is the city described here: 516,032 people over 314.515 square miles in Jackson, Clay, Platte and Cass counties, permitting under its own Chapter 18 and the 2018 IRC it adopted. Kansas City, Kansas is a separate municipality in a separate state with its own government, its own adopted codes and its own permitting, and nothing on this page applies to it. Everything set out here is Missouri law and Kansas City, Missouri ordinance: the RSMo sections, the Missouri Constitution provisions, the county classifications and the city code citations. If your parcel is west of the state line, none of it governs your build.

Building in Kansas City?

Start with the plan. Tell us what you want to build and we will draw it, then confirm which office issues the permit for your parcel, what it will let you put there, and what wind load it has to meet. That conversation costs nothing.

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