Pool Cost Calculator / Montana
Inground Pool Cost in Montana (2026)
Start with a 400 sq ft pool in Montana, compare materials, then adjust the calculator to your project. The regional model factor is 100% of the national baseline for the area-and-depth portion of the shell price; it is not a measured local labor rate. Residential electricity is approximately 14¢/kWh in the EIA-based data through April 2026.
A 400 sq ft gunite pool in Montana
20 ft × 20 ft, 5 ft average depth, standard (flat) excavation, no add-ons. The calculator below starts with these same assumptions.
Not an all-in project quote. Decking, fencing, heating, covers and other add-ons are not selected. Permits, unusual site conditions, utility upgrades and yard restoration require separate confirmation with your contractor. The displayed range is a modeled ±15% band, not a statistical confidence interval or a survey of local bids.
Read the calculation methodology and pricing and energy source notes before comparing a contractor's scope with this estimate.
- Estimate for pre-qualification, not a quote; price varies by contractor, location, and season.
Last updated June 30, 2026
Gunite vs. fiberglass vs. vinyl in Montana
Same 400 sq ft pool, priced three ways with the same Montana regional model factor and flat excavation.
- Gunite (concrete)
- $42k – $56k
- Fiberglass
- $39k – $53k
- Vinyl liner
- $29k – $39k
Estimate your pool in Montana
Site data & assumptions: U.S. EIA · OpenEI URDB · Google Solar · NREL PVWatts · DSIRE · IRS · ENERGY STAR · Ballpark Lab model assumptions — see all sources
Already have a pool? Plan monthly maintenance and heating costs. Those calculators have separate defaults; select your location and size there. Or return to the national pool cost calculator.