Swimming pools are among the most variable residential projects, since ground conditions, access and finish choices can each change the price dramatically.
What the permit filings show
Based on 3,799 residential building-permit filings. The median swimming pool valuation runs from $30,000 in Los Angeles to $89,315 in Seattle, about 3.0× the cheapest city. Within a city the spread matters too: the middle half of Seattle filings spans 252% of its median, versus 70% in Austin.
CityTypical range (P25–P75)MedianFilings
Los Angeles$14,000 – $45,000$30,0001,442
Austin$43,000 – $85,000$60,0002,245
Seattle$25,000 – $250,000$89,315112
Filings are declared valuations from each city's open permit dataset, limited to residential records classified as swimming pool work and valued between $1,000 and $2,000,000. A city is listed only when at least 30 filings qualify. Full methodology. Data refreshed September 2026.
What the numbers say
Sample size varies by city too — 2,245 qualifying swimming pool filings back the Austin figures above, versus just 112 for Seattle — and while both clear the site's 30-filing minimum, Austin's far larger sample settles into a steadier shape than Seattle's, which sits closer to that threshold.
Zoom out across every city on this page and the legitimate range is wider still: the lowest 25th-percentile figure is $14,000, in Los Angeles, and the highest 75th-percentile figure is $250,000, in Seattle — a 17.9× gap that reflects different cities, codes and building stock, not overcharging.
In Austin, quotes cluster tightly: the middle half of filings sits between $43,000 and $85,000, so a quote near the $60,000 median there is the safer assumption. In Seattle, that band runs from $25,000 to $250,000 — wide enough that a quote toward either edge is still plausible, so treat Seattle's median as a starting point for a conversation, not a target.
Site conditions dominate
Excavation is the biggest unknown. Rock, groundwater, poor access for machinery and sloped sites all raise the cost, and they are hard to price before digging starts. Ask for the soil and site assumptions behind the quote in writing.
The pool is only part of the project
Decking, fencing, safety barriers, landscaping, heating and covers are often separate from the pool shell itself. A permit valuation may capture only part of what you will actually spend.
Safety and compliance
Pool barriers and electrical bonding are inspected in most places, and requirements vary. Confirm who is responsible for permits and final safety inspection before work begins.
What drives the cost of a pool
Excavation and site access set the floor. Machinery has to reach the dig site, and rock, high groundwater or a sloped yard can turn a routine excavation into a multi-day operation before the structure is even started — none of that is visible from a rendering.
Structure and finish set the middle of the range: a vinyl-liner or fiberglass shell costs less than poured gunite or shotcrete, and coping, tile and interior finish then scale with both size and specification.
Equipment, plumbing and the electrical connection are a smaller but largely fixed cost regardless of pool size, while permitting and safety inspection add time rather than materials cost — though a project that fails inspection over fencing or bonding can sit unfinished, and unusable, for weeks while it is corrected.
A worked example
Take Austin, the city with the most filings behind its figures (2,245). Suppose two contractors quote for the same swimming pool: one at about $60,000, in line with the local median, and another at about $100,000, well above the local P75 of $85,000.
Neither figure alone says which contractor is right: $60,000 sits where most Austin filings land, a reasonable opening point, while $100,000 sits above where three-quarters of them do — not necessarily a red flag, since difficult excavation, a poured-concrete structure or elaborate coping and tile work can all justify it — but a scope worth having spelled out before you sign. Both figures are illustrative.
What a pool permit valuation leaves out
A pool permit valuation is what the applicant declared for the permitted scope — typically the basin, structure, plumbing and required safety features. It is not automatically the same as what a homeowner pays a pool builder end to end.
Decking, fencing, landscaping and a cover are commonly quoted and installed separately from the pool itself, sometimes under their own permit, so an all-in builder proposal can cover more ground than the figures on this page.
Financing costs, design fees, and any rock removal or dewatering discovered mid-excavation are the kind of extras that show up on a final invoice but rarely make it into the value declared with the permit application.
Use your quote to test the range
What this project can cover
Pool projects can involve the basin, excavation, equipment, plumbing, electrical connection, coping, and required safety features.
What may sit outside it
Landscaping, fencing, retaining walls, access work, rock removal, groundwater control, heating, and covers may be separate.
Checks before you accept a quote
Separate excavation, structure, equipment, and finishes.
Get site and soil assumptions in writing.
Confirm who obtains permits and completes safety inspections.
Questions to ask before you sign
What happens to the price if excavation hits rock or a high water table?
Is the quote for a vinyl-liner, fiberglass or poured-concrete structure, and is that specified in writing?
Does the price include decking, fencing and the safety barrier an inspector will require, or are those separate?
Who pulls the permit, and who is present for the safety inspection?
What is included for equipment — pump, filter, heater — and what are the ongoing running costs?
How is a change to the pool size or shape after signing priced?
What warranty applies to the shell versus the equipment, and who honors each one?
Questions people ask
Does this range include the fence and decking around the pool?
Not necessarily. The permit valuation covers the pool's own permitted scope; decking, fencing and landscaping are frequently priced and permitted separately, so check whether a builder's quote matches that scope or a wider one.
Why does the typical price vary so much between cities?
Climate and local permitting practice matter more than which builder you hire. Cities where in-ground pools are built year-round tend to have a longer tail of large, elaborate projects, which widens the top of the range without necessarily moving the typical price.
Is a below-ground pool always more expensive than one I've seen advertised online?
Advertised 'starting at' prices are usually for the pool package alone, assuming easy digging conditions. The figures here are actual declared costs including whatever site work each project needed, which is why they often run higher than an advertised base price.
Do these figures include a hot tub or spa?
Only if it was declared as part of the same permitted project. A separate spa is often its own line item or its own permit, so check whether your quote bundles the two before comparing it to this range.