Sitework Cost Guide — Kansas City Pricing & Bid Breakdown
Real ranges, honest breakdown, no lowball traps. What sitework actually costs in the KC metro, what drives the price, how to read a bid, and where the hidden traps live.
01 — Cost by Service Type
Sitework Cost by Service Type
The table below shows the units commercial and residential sitework is typically priced by in the Kansas City market, along with the ranges we have published with confidence and the items where we will not publish a range at all. Where the cell reads "varies — request a bid," the honest answer is that the spread between a simple version of that scope and a complicated version of it is so wide that any published number would mislead more projects than it would help. The only accurate number is a bid built from the civil plans and a site visit.
| Service | Unit | KC Metro Range | What Affects Price |
|---|---|---|---|
| Mass excavation (common earth) | Per bank cubic yard | $8 – $25 | Soil type, depth, access, haul distance |
| Rock excavation | Per cubic yard | Varies — request a bid | Rock hardness, depth, ripping vs hoe-ram, weathered vs solid limestone |
| Structural fill (placed and compacted) | Per compacted cubic yard | $20 – $40 | Source material, haul distance, compaction testing |
| Site grading (rough) | Per acre | Varies — request a bid | Terrain, cut/fill volume, soil conditions |
| Site grading (fine, laser-guided) | Per square foot | Varies — request a bid | Tolerance required, equipment, GPS vs rotating laser |
| Land clearing (brush and light vegetation) | Per acre | Varies — request a bid | Density, debris disposal, topsoil stockpile handling |
| Land clearing (heavy timber) | Per acre | Varies — request a bid | Tree diameter, stump grinding, haul-off |
| Utility trenching | Per linear foot | Varies — request a bid | Depth, soil type, shoring, bedding, backfill spec |
| Demolition — concrete slab | Per square foot | Varies — request a bid | Slab thickness, rebar content, haul-off |
| Erosion control — silt fence | Per linear foot | Varies — request a bid | Terrain, trenched vs surface-stapled install |
| Storm pipe (RCP or HDPE) | Per linear foot | Varies — request a bid | Diameter, material, depth, bedding |
| Mobilization — commercial | Flat fee | $1,500 – $5,000 | Equipment count, lowboy transport distance, staging setup |
| Mobilization — residential | Flat fee | $500 – $1,500 | Equipment count, haul distance |
Ranges reflect typical KC metro conditions and normal project logistics. Complex sites, rock conditions, dewatering, shallow bedrock, or long haul distances can push any line outside the published range.
02 — Cost Drivers
What Drives Sitework Cost in the KC Metro
Soil conditions. The single biggest cost variable in KC sitework is what comes out of the ground. Wymore-Ladoga clay — the dominant near-surface soil across Jackson, northern Johnson, Clay, and Cass counties — is workable but unforgiving. It has a narrow moisture window for compaction, it swells 25–35% from bank to loose, and it holds water long after a rain. Move 20 miles south into Olathe or Gardner and you hit limestone bedrock at 3–15 feet, which swings the cost equation from dirt moving to rock excavation. Two projects of identical scope can vary by 50% or more based on soil alone.
Access and staging. An urban infill site in downtown KCMO with no lay-down space, tight truck turns, and pedestrian traffic costs more to work than a 40-acre greenfield in south Olathe where equipment can spread out. Staging space, haul routes, and neighboring property constraints all show up in the bid — often as crew hours rather than as a separate line item, which is part of why comparing bids from different contractors is harder than it looks.
Haul distances. Spoils disposal and fill import both scale with truck miles. At roughly $25–$35 per load for hauling in the KC metro — distance-dependent — moving 2,000 loose cubic yards off-site quickly becomes a five-figure line item before you account for disposal fees at the receiving site. Finding a local fill site or reuse opportunity can save more than any other single cost lever on a big dirt job.
Regulatory requirements. SWPPP, NPDES permits, bonding, PE-stamped erosion control plans, compaction testing, and city grading permit review all cost real money. A bid that does not carry these items as discrete line items is either absorbing them into unit prices (fine, but ask) or forgetting them (not fine). For the full regulatory picture, see the sitework permits and regulations reference.
Seasonal timing. KC's weather window is not neutral. Spring clay is saturated and unworkable; expect 40–50% weather days in March through May. Summer is reliable but extreme heat dries clay into hard clods that have to be moisture-conditioned before compaction. Late summer and early fall are the cheapest windows because production holds. Winter is possible but frozen ground adds cost and KC frost depth runs 30–36 inches.
Project scale. Larger projects spread fixed costs — mobilization, BMPs, crew minimums, survey setup — across more billable units. A 5-acre commercial site is almost always cheaper per square foot than a half-acre site of the same scope complexity. Economies of scale are real in sitework.
03 — Reading a Bid
How to Read a Sitework Bid
BCY, LCY, and CCY. Sitework volume is measured three different ways and the unit matters. Bank cubic yards (BCY) measure the volume of soil as it sits in the ground before it is disturbed. Loose cubic yards (LCY) measure the same soil after it has been excavated, bulked, and loaded onto a truck — KC clay swells 25–35% going from bank to loose. Compacted cubic yards (CCY) measure the same soil after it has been placed as fill and compacted to spec, which shrinks it back down. A bid quoting excavation at $10/BCY and a bid quoting the same scope at $10/LCY are not the same bid. Our excavation contractor page owns the detailed mechanics and conversion math.
Mobilization as a separate line item. Mobilization belongs on its own line because it is a real, fixed cost that does not scale with production. Bids that roll mobilization into unit prices hide it — and they get worse-looking the smaller your project is, because a hidden $3,000 mob fee buried in a 500-CY excavation price is $6/CY of concealed markup. Ask to see mobilization separately.
What is included vs excluded. A well-written sitework bid lists each major scope — mobilization, clearing, mass excavation, structural fill, grading, utility trenching, erosion control, storm drainage, compaction testing, closeout — with a unit and a quantity. It also lists what is not included: rock excavation, dewatering, unsuitable soil replacement, import fill, blasting, bonding. Common allowances show up as separate lines with a capped dollar amount. Exclusions are not dishonest if they are written down clearly — they become dishonest when they are not.
Red Flags in a Lowball Bid
- ▶No SWPPP or erosion control line — the bidder is assuming the GC will cover it, or forgot about it entirely.
- ▶No compaction testing — nuclear density gauge work and proof rolling cost money and should be a line item.
- ▶No mobilization fee — it is not missing, it is buried in the unit prices.
- ▶"TBD" or "contractor to verify" on soil conditions — you are about to buy a change order.
- ▶No bonding line on a project that requires bonds — the bidder has not priced the surety cost.
- ▶No rock contingency on a southern Johnson County project — rock is not a surprise there, it is a certainty.
- ▶Lump-sum excavation with no BCY quantity — you lose the ability to adjust cleanly if quantities change.
04 — Single-Source Value
The Hidden Cost of Separate Subs
A project that hires a grading contractor, a utility contractor, and a concrete contractor as three separate subs pays three separate mobilization fees, manages three separate schedules, and owns the coordination gaps between them. Every handoff is an opportunity for the trade that follows to blame the trade that preceded — and every week of schedule gap between subs costs real money in extended general conditions, carrying costs, and delayed rent.
Ford Concrete runs sitework and concrete with the same crew. One mobilization instead of three. No schedule gap between grading and the concrete pour. No finger-pointing when a sub-grade problem shows up at finish time — because the people who built the sub-grade are the people finishing the slab. On commercial jobs with both scopes, the single-source delivery model typically saves between 5% and 15% on the combined sitework-plus-concrete total versus hiring each scope separately, and it saves calendar time that is usually worth more than the dollars.
This is the reason general contractors in the KC metro keep bringing us back on ground-up commercial work — it is not about the unit prices line by line, it is about the project total and the schedule certainty at the end of the job. For the sitework side, see the sitework hub. For the concrete side, see our warehouse and industrial floors page.
Sitework Cost — FAQs
How much does sitework cost for a typical commercial building in Kansas City?
A small commercial pad — say a 2-acre restaurant or retail site — can run anywhere from roughly $75,000 on the low end to several hundred thousand on the high end once you combine clearing, mass excavation, grading, utility trenching, SWPPP compliance, and storm drainage. The spread is that wide because soil conditions, haul distances, rock, and import fill swing the number dramatically. The only accurate answer is a bid built from the civil plans and a site visit. We do not publish package prices for commercial sitework because doing so would mislead every project that does not match the assumptions behind the package.
Why is rock excavation so much more expensive than dirt?
Dirt comes out with a bucket. Rock has to be ripped, broken, or blasted before the bucket can move it. In the Kansas City metro, rock excavation mostly comes up in southern Johnson County where Bethany Falls and Argentine limestone sit 3–15 feet below grade. Weathered rock can be ripped with a D8 dozer. Solid limestone requires a hydraulic breaker (hoe-ram) mounted on an excavator, which is slow and hard on equipment. Production rates can drop to a fraction of common earth excavation, and the machine cost per hour is higher, which is why rock excavation is priced as a separate line and why the range on rock is always wider than the range on dirt.
What is a mobilization fee and why is it a separate line item?
Mobilization covers getting equipment, crew, and support vehicles to the job site and set up to begin work. On a commercial sitework job that means lowboy transport of dozers, excavators, and motor graders, setting up a staging area, installing a rock construction entrance, and putting perimeter erosion control in place before any production work begins. It is a real cost that scales with how much iron has to move and how far it has to travel. Bundling multiple scopes — sitework plus concrete, for example — cuts mobilization in half or better because the equipment only moves once. That is a real dollar advantage of single-source delivery.
How much does a SWPPP add to project cost?
A SWPPP adds cost in three places. The permit itself is roughly $90 on the Kansas side and varies on the Missouri side. The plan preparation runs from a few hundred dollars for a small site up into the thousands for a complex one (and must be PE-stamped in Kansas). The physical BMPs — silt fence, wattles, construction entrance, inlet protection, and their inspection and maintenance across the life of the project — are where most of the dollar impact lives. On a typical KC commercial project, the installed and maintained BMP package commonly runs into the low five figures. A bid that does not break out erosion control as a separate line item is hiding something.
What is the cheapest time of year to do sitework in Kansas City?
Late summer and early fall — August through October — are typically the most reliable weather windows in the KC metro for earthwork. Clay is drier, compaction is easier to hit, and fewer days are lost to rain. Spring (March through May) is the most expensive hidden-cost window because wet Wymore clay becomes unworkable after rain and crews lose 40–50% of their days on average. Winter sitework is possible but frozen ground adds cost, and KC frost depth is 30–36 inches — meaning water lines and other utilities have to be installed below that and any trench bottom can be frozen hard. The cheapest calendar answer is: schedule dirt work for late summer.
How do I compare sitework bids that use different units?
Normalize everything to the same unit and quantity before you compare. If Bid A quotes excavation per bank cubic yard and Bid B quotes the same scope per truck load, convert both to compacted cubic yards using the swell and shrink factors for KC clay (roughly 25–35% swell from bank to loose). Make sure both bids include the same scope items — mobilization, erosion control, SWPPP, compaction testing, proof rolling, and haul-off are the common differences. A "cheaper" bid is almost always cheaper because it left something out, not because the contractor found real savings. For the mechanics of bank, loose, and compacted volume conversion, see our excavation contractor page — that page owns the detailed math.
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