How this pool cost estimator works
- Shell. Surface area (length x width, or 85% for freeform) times a per-sq-ft rate for the pool type. Our rates (low / typical / high): gunite $100 / $140 / $200, fiberglass $90 / $115 / $160, vinyl liner $60 / $85 / $125, above-ground $8 / $14 / $22. Depth adjusts gunite and vinyl by 5% per foot away from 5.5 ft, then access and soil factors multiply the result. The rates include excavation, basic equipment and a standard finish, and were chosen to land inside published ranges at typical sizes.
- Add-ons and permit. Added at your prices. Low and high totals apply x0.85 and x1.25 to add-ons.
- Pump electricity. kW x hours per day x 365 x price per kWh. Above-ground pools use a smaller pump (half the energy).
- Chemicals, water, insurance, equipment. Typical annual allowances by pool type, scaled by pool size. Water assumes about 60 inches a year of evaporation and splash-out plus 3,000 gallons for backwashing. Fiberglass needs the fewest chemicals because its smooth surface resists algae. A salt system trims chemical cost a little and adds a small cell-replacement allowance.
- Resurfacing, amortized. Cost divided by life: gunite replaster about $10,000 for a 16 x 32 pool every 12 years, vinyl liner about $4,500 every 9 years, fiberglass gelcoat refinish $4,000 every 25 years (our assumption), above-ground liner $600 every 8 years (our assumption). Ranges in published guides are wide, so treat these as rough.
Texas and Houston notes
- Barriers: Texas Health and Safety Code Chapter 757 (pool yard enclosures) sets state-level requirements for residential pool barriers. Summaries commonly report a minimum 4 ft barrier with self-closing, self-latching gates, but exact wording, exceptions and which pools it covers matter. Read the statute and check locally.
- Houston: the City's swimming pool permit page and Houston Health Department residential pool page describe plan review, the fence line shown on your survey, and inspections. The city's pool and spa safety rules are in Chapter 43 of the Code of Ordinances. Other cities, counties and HOAs have their own rules, so check with yours.
- Clay soil: Houston's expansive clay moves with moisture. Builders handle it with engineered steel, drainage and sometimes a different pool type. Ask for a geotechnical report on pricier projects. Our soil factor is only a placeholder.
- Electric rates: Texas has retail electric choice in much of the state. The EIA Electric Power Monthly, Table 5.6.A lists average residential price by state; Texas ran roughly 15 to 16 cents per kWh in 2025. Your plan is the number that counts.
Cost sources
- HomeGuide, inground pool cost, gunite (about $50,000 to $120,000), fiberglass (about $45,000 to $100,000) and vinyl liner (about $25,000 to $65,000 for 300 to 400 sq ft).
- HomeGuide, above-ground pool cost: about $1,600 to $7,500 installed, and salt water pool costs.
- Pool heater, pool deck (about $25 to $50 per sq ft) and pool fence (about $20 to $60 per linear foot) from HomeGuide. Spas run roughly $6,000 to $25,000 and automation about $1,500 to $3,500 in published guides.
- HomeGuide, pool maintenance cost and pool resurfacing: chemicals, electricity and replaster ranges. Published guides put chemicals around $300 to $1,100 a year, insurance increases around $200 to $500, replastering around $6,000 to $15,000 and vinyl liners about $4,500 every 5 to 15 years.
Sources disagree and many are pool-industry marketing. We could not verify every figure at its original source, so these are typical ranges, not quotes. Get written bids from at least three licensed pool builders and ask each what is and is not included (deck, fence, electrical, grading and permit fees are the usual gaps).