This foundation cost estimator is the most complete free foundation cost calculator available — covering foundation cost, patio and pad cost, concrete removal, footing sizing, commercial slabs, and sidewalk costs in one six-mode tool. For a standard residential concrete slab foundation, expect to pay $4–$8 per square foot installed, or roughly $5,000–$14,000 for a typical 1,200 sq ft home. Concrete patios run $5–$18 per sq ft depending on finish, and concrete removal costs $2–$6 per sq ft depending on thickness and reinforcement.

Below you'll find three professional diagrams — a foundation types comparison, a footing cross-section with cost zones, and a cost-per-square-foot comparison chart — plus reference tables for every project type. Work through the six calculator tabs for foundation cost, patio and pad cost, demolition and removal, footing sizing, commercial slab estimating, or sidewalk cost — or jump directly to the cost guide you need.

How much does a foundation cost — foundation cost estimator guide

Foundation costs vary significantly by type. A concrete slab costs $4–$8 per sq ft installed, a crawl space runs $7–$18 per sq ft, pier and beam is $7–$12 per sq ft, and a full basement foundation ranges from $25–$50 per sq ft of footprint. For a typical 1,200 sq ft home, total foundation costs range from roughly $5,000 for a basic slab to $60,000 for a full poured basement — making this foundation price calculator essential for early budgeting before you talk to contractors.

Three factors drive most of the variation you'll see between a low bid and a high bid on any concrete foundation cost calculator estimate. First, soil conditions and site preparation — expansive clay, high water tables, or sloped lots require extra excavation, fill, drainage, and sometimes engineered footings, which can add 15–40% to a base estimate. Second, regional labor rates swing pricing dramatically; concrete crews in the Pacific West or Northeast charge considerably more per hour than crews in the Southeast or South. Third, reinforcement requirements set by local building code — many jurisdictions in seismic or high-wind zones mandate heavier rebar grids than the national baseline, which raises material and labor cost together.

Homeowners searching for a house foundation cost calculator or a basement foundation cost calculator should treat these figures as starting points, not final numbers. Excavation access (a lot with a tight side yard costs more to dig than an open field), utility rough-in complexity, and whether the site needs a French drain or sump system around a basement all add cost outside the base per-square-foot figure. For footing depth requirements below any foundation type, cross-reference our Deck Footing Calculator, which includes frost-depth guidance by region.

Pier and beam foundation cost — what to expect

Pier and beam foundations cost $7–$12 per square foot installed, or $8,400–$14,400 for a 1,200 sq ft home footprint. Individual concrete piers cost $200–$500 each installed, depending on diameter and depth. Pier spacing is typically 6–8 feet on center, so a 1,200 sq ft home footprint generally requires 20–35 piers plus beam material.

Pier and beam cost is essentially calculated as: (number of piers × cost per pier) + beam material + labor to set and level the beams. This method is preferred over a slab in flood zones (raised floor keeps living space above flood elevation), on expansive clay soils (piers isolate the structure from soil movement better than a rigid slab), on sloped sites (piers of varying height are cheaper than massive cut-and-fill), and in older-home foundation repair (individual piers can be replaced without disturbing the whole foundation).

Typical residential pier specifications run 12–16 inches in diameter and 24–48 inches deep, depending on soil bearing capacity and load. New pier and beam installation runs the full $7–$12/sq ft range above; repair or releveling of an existing pier and beam foundation is usually priced per pier ($150–$400 each) rather than per square foot, since only a portion of the piers typically need attention.

Concrete footing size and cost — footing sizing guide

Concrete footing size is determined by dividing the post or column load by the soil's bearing capacity. A post carrying 2,000 lbs on average residential soil (1,500 psf) needs a footing with at least 1.33 sq ft of base area — equivalent to a 16-inch diameter round footing. The cost to pour concrete footings ranges from $200–$700 per footing contractor-installed, or $54–$155 in DIY materials.

Concrete footing design requires knowing the tributary load, soil bearing capacity, frost depth, and local code minimums. For residential decks, IRC prescriptive tables are typically used and require no engineer. For structural house foundations or heavily loaded columns, a licensed engineer should review the footing design before pouring.

Concrete removal cost — demolition and slab removal guide

Concrete removal costs $2–$8 per square foot depending on slab thickness and reinforcement. A standard 4-inch patio (200 sq ft) costs $500–$1,100 to break out and haul away. Rebar-reinforced slabs cost 20–30% more due to cutting time, and post-tensioned slabs require an engineer's review before any cutting because tension cables can release dangerous stored energy.

Thickness and reinforcement type are the two biggest drivers of demolition cost, but site access matters almost as much — a slab reachable by a skid-steer or mini excavator is far cheaper to remove than one behind a fence requiring hand-breaking with jackhammers. Haul distance and disposal fees add further variation: local dump tipping fees for concrete debris typically run $30–$70 per ton, and jobs far from a disposal facility cost more in truck time.

For reference, standard concrete weighs approximately 150 lbs per cubic foot, or about 12.5 lbs per square foot per inch of thickness. A 200 sq ft, 4-inch slab weighs roughly 10,000 lbs (5 tons) — useful for estimating dumpster size or truck loads needed for haul-away.

Concrete patio cost and sidewalk cost — installation guide

A standard broom-finish concrete patio costs $5–$8 per sq ft installed. Stamped concrete runs $10–$18 per sq ft. A 200 sq ft patio costs $1,000–$3,600 depending on finish. A concrete sidewalk (4 ft wide, 50 ft long = 200 sq ft) costs $1,200–$2,400 installed.

"Cement" and "concrete" are often used interchangeably by homeowners searching for a cement patio cost calculator — but cement is simply an ingredient (a powdered binder) inside the finished material called concrete. Every patio, pad, and slab cost figure on this page refers to poured concrete, not pure cement, since cement alone is never poured as a wearing surface.

Commercial concrete slab cost estimator — light to heavy industrial

Commercial concrete slab costs range from $5–$20 per square foot depending on thickness, reinforcement, and use type. Light commercial office slabs (4"–5", wire mesh) run $5–$9/sq ft. Heavy industrial slabs (6"–8", rebar grid) run $9–$20/sq ft. A 5,000 sq ft light commercial slab costs approximately $25,000–$45,000 installed.

Foundation and concrete cost calculator — frequently asked questions

More free construction calculators on everycalcpro.com

Continue planning your project with these related tools — all free, no account required.