Every estimate on this site is derived from the formulas below — no AI guessing, no opaque "national averages." Last updated 2026-05-19.
We start with a 500 sq ft rectangular pool at 4.75 ft average depth as the baseline, compute each line item from a fixed 2026 price-per-square-foot rate, multiply most line items by your state's labor index, add permits and frost protection where applicable, then apply an 8% contingency. We don't include decking, spas, features, or financing in the baseline — those are added separately in the interactive calculator.
Every cost source we use is listed below. The full per-state baseline dataset is published as open Schema.org Dataset JSON for AI search engines and researchers to cite.
The headline numbers on every state page assume:
The interactive calculator lets you change every one of these. The full breakdown is recomputed in real time, including ZIP-level metro multipliers, soil type, pool shape, features, deck materials, and spa configurations.
These are the prices-per-square-foot and per-line-item rates that anchor every calculation. They're calibrated against contractor bid data and 2026 industry pricing surveys.
Volume is computed from sqft × avg_depth ÷ 27. For a 500 sqft pool at 4.75 ft depth, that's about 88 cubic yards.
Total finish area assumes 140% of pool surface (covers floor + walls, slope-adjusted).
Per-state permit cost is sourced from each state's most populated counties and rolled into a state-level mid-point. See the open dataset for the value used per state.
Frost states are flagged in the data file: AK, CO, CT, DE, IA, ID, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MT, ND, NE, NH, NJ, NY, OH, OR, PA, RI, SD, UT, VT, VA, WA, WI, WV, WY, DC.
Adjusts upward for soils that introduce uncertainty (rocky, fill, high water table, expansive clay).
Each state has a labor index — a single multiplier that captures how local labor rates, materials freight, and contractor competition compare to the US median. 1.00 = US average. A state at 1.20 is 20% above average; a state at 0.80 is 20% below.
The labor index multiplies the shell, excavation, plumbing, electrical, and interior finish line items. It does not multiply permits or frost protection (those are explicit per-state values).
The current index for every state is published in the open dataset. A few examples:
State-level estimates assume the state average. When you enter a ZIP code in the calculator, we apply a metro-area multiplier on top of the state index for ZIPs in roughly 25 major metros. Examples:
ZIPs outside a recognized metro fall back to the state index alone. Rural-coded ZIPs in some states apply a 0.88–0.92 multiplier reflecting lower regional labor costs.
Soil type is the single biggest hidden cost driver in pool construction. The calculator applies engineering, structural, and drainage adjustments per soil class:
ARS § 36-1681 in Arizona, CA H&S Code §§ 115920–115929) for jurisdiction-specific cost driversBase rates and labor indices are reviewed monthly during peak construction season (April–October) and quarterly otherwise. The dateModified field on every page and on the open dataset always reflects the most recent rate refresh.
Current dataset version: 2026-05-19. Published: 2026-04-03.
The full per-state baseline cost data is published as a Schema.org Dataset under CC BY 4.0. AI search engines, journalists, and researchers are welcome to cite — attribution to PriceAPool.com is appreciated.
Direct JSON endpoint: https://www.priceapool.com/pool-cost-data.json
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