Cost to Pour a 1,000 Sq Ft Concrete Slab: $4,000 to $12,000
One thousand square feet is the scope where residential concrete reaches its most efficient installed per-sq-ft rate. The 2026 cost range is $4,000 to $12,000 installed, with a 4-inch wire-mesh slab typically landing at $5,500 to $7,000. The project requires two-truck coordination and a crew of 4, but the per-sq-ft cost drops to the lowest residential rate in the series.
What 1,000 Square Feet Builds
One thousand square feet is the foundation size where backyard projects step up from "patio or pad" to "small building." Common applications at this scale include a 25x40 ft hobby barn or detached workshop with a single roll-up door and a side personnel door; a 30x33 ft 3-vehicle garage with workspace between the bays; a 22x46 ft RV-plus-vehicle pad with hookup connections, gravel apron, and side-vehicle space; or a 32x32 ft footprint for an accessory dwelling unit (ADU) or guest cottage foundation.
Each application has different spec implications. A workshop or hobby barn typically uses 4-inch slab with rebar (vehicles enter occasionally, the slab must support modest equipment loads). A 3-vehicle garage uses 6-inch slab with rebar (vehicles in and out constantly, plus tool boxes and lifts). An RV-plus-vehicle pad uses 6-inch rebar with attention to drainage slope (RV weight and vehicle weight both load the slab). An ADU foundation uses 4 inches or 6 inches per local code (often 6 inches with footings around the perimeter) and is engineered to support the building above, with vapor barrier mandatory and frost-depth footings extending below grade.
The ADU case typically requires engineered drawings stamped by a licensed structural engineer ($800 to $2,500 for the drawings depending on jurisdiction) and a more involved permit process than the workshop or garage cases. The slab itself costs roughly the same, but the engineering and permitting overhead adds $1,000 to $4,000 on top of the slab construction. If you're considering an ADU, factor this overhead into the budget upfront.
For the workshop and garage cases, the building above the slab is the larger budget item. A 1,000 sq ft pole-barn or wood-frame outbuilding costs $25,000 to $80,000 to build, dwarfing the slab cost. Many homeowners build the slab in one season and the structure in the next, spreading the cash outlay. The slab cures fully at 28 days and can sit unbuilt-upon indefinitely with no degradation.
Why the Pour Requires Two Coordinated Trucks
At 12 to 18 cubic yards, a 1,000 sq ft pour exceeds the 10 cubic yard capacity of a standard ready-mix truck. The supplier dispatches two trucks: the first arrives at the scheduled pour time, the second arrives roughly 30 to 40 minutes later. The crew has to keep the leading edge of the pour wet (continuous placement, no significant pause) so that the second-truck concrete bonds properly to the first-truck concrete without creating a cold joint that becomes a stress crack later.
The two-truck coordination is the single most-time-sensitive aspect of a 1,000 sq ft pour. If the second truck is delayed by 45 minutes or more (traffic, dispatch error, weather), the first-truck concrete starts to stiffen at the leading edge and the contractor faces a choice: accept the cold joint and live with a future crack, or place a control joint at the cold-joint line and treat it as designed. Most contractors will pre-plan a control joint location halfway across the pour so that if a truck-coordination problem occurs, the control joint masks the cold joint. This is standard practice and the homeowner usually does not see it as a problem.
Some suppliers offer 12 or 13 cubic yard trucks ("super-loads") that can deliver a 1,000 sq ft 4-inch pour in a single trip. These trucks are more common in larger metros and typically cost $50 to $150 extra in delivery surcharge. If your contractor mentions a super-load option, take it: single-truck delivery eliminates the coordination risk and simplifies the pour.
Why 4 Workers Is the Right Crew
The standard crew for a 1,000 sq ft pour is 4 workers, up from 3 on a 500 sq ft project. The fourth worker handles the increased pour rate and the second-truck coordination. Typical role assignment: one worker runs the chute and directs concrete placement (this is usually the foreman). One pair screeds and floats the leading edge. The fourth worker manages perimeter forming, expansion joints, edge finishing, and clean-up of spilled concrete.
A crew of 3 can complete the work but is rushed during the finishing window and tends to produce uneven finishes near the perimeter. A crew of 5 is overkill at 1,000 sq ft and adds labour cost without speeding the project. Above 1,500 sq ft, crews of 5 to 6 become standard because the area covered per pour increases beyond what 4 workers can finish in the 90-minute window after the last concrete is placed.
Hourly labour cost at this crew size runs $250 to $400 per hour (4 workers at $65 to $100 per hour fully-loaded), with the pour itself consuming 5 to 6 crew-hours. Total day-of-pour labour runs $1,250 to $2,400, which is 15 to 25 percent of the project total. The remainder is materials ($2,500 to $4,500), site work ($1,000 to $2,000), and contractor overhead ($800 to $1,800). The labour share at 1,000 sq ft is lower than at smaller projects because the crew is more efficient per sq ft.
Why Per-Sq-Ft Cost Bottoms Out Here
The per-sq-ft installed cost curve hits its residential bottom at roughly 1,000 to 1,500 sq ft. Below 200 sq ft, mobilisation cost dominates and per-sq-ft rate is high ($7 to $12). Between 400 and 800 sq ft, mobilisation amortises but short-load fees still apply on smaller orders, and per-sq-ft rate is moderate ($5.50 to $8). At 1,000 sq ft and above, full-truck-load economics apply, crews are efficient, and per-sq-ft rate hits the low end ($5.50 to $7 for a wire-mesh 4-inch slab in a typical Midwest market).
Beyond 1,500 sq ft, the per-sq-ft cost stays relatively flat. There are modest efficiency gains in the 2,000 to 3,000 sq ft range from crew specialisation, but the marginal cost per added sq ft is roughly the same as the average cost per sq ft at the 1,000 sq ft scale. The curve eventually picks up again above 5,000 sq ft as projects move into commercial-style execution with project managers, engineered slabs, and tighter quality requirements.
For homeowners considering a slab in the 800 to 1,500 sq ft range, the per-sq-ft economics actually favour building slightly larger if the use case allows. The marginal cost of going from 800 to 1,000 sq ft on the same project is roughly $4 to $5 per added sq ft (versus the $6 to $7 per sq ft average), because the fixed costs are spread across more area. If you can use the extra 200 sq ft, the marginal cost is the cheapest concrete you'll ever buy. Use the size calculator to see exact numbers for your dimensions.
Permit Path for a 1,000 Sq Ft Slab
A 1,000 sq ft slab almost always requires a building permit, regardless of intended use. Most jurisdictions exempt slabs under 120 to 200 sq ft (per the standard building-permit exemptions in the International Residential Code that many states adopt); above this threshold, a permit is required. Permit fees range from $100 to $500 for a slab-only permit, plus inspection fees ($75 to $200 per inspection, with typically 2 inspections: pre-pour for forming and reinforcement, and post-pour for finished slab).
The pre-pour inspection is the more important of the two. The inspector verifies that the forming is structurally sound, that the reinforcement is the correct grade and spacing, that the gravel base is compacted, that the vapor barrier is in place if required, and that the slab elevation matches the approved drawing. Any deficiencies trigger a hold on the pour. Contractors who have built a relationship with the local inspector can usually schedule inspection within 24 to 48 hours; cold-call contractors may face 5 to 7 day delays on inspection scheduling.
If the slab supports a building (workshop, garage, ADU), the slab permit is typically rolled into the broader building permit, which adds $300 to $1,500 to the permit cost and requires architectural and structural drawings. If you're considering a long-term plan that includes a building above the slab, file the building permit upfront even if construction is phased over multiple years; the permit covers the slab and the building together at lower combined fee than two separate permits. See the cost factors page for the permit-fee breakdown by jurisdiction.