How many gallons is a typical pool?

A standard 20x40 ft inground pool with 5 ft average depth holds approximately 30,000 gallons. Above-ground pools typically hold 10,000-20,000 gallons.

How much does it cost to build an inground pool?

Basic inground pools cost $25-$50 per square foot ($25,000-$50,000 for a standard size). Premium pools with features like waterfalls, saltwater systems, or custom shapes can exceed $100,000.

What are the annual costs of owning a pool?

Annual pool maintenance costs range from $1,200-$3,000, including chemicals ($300-$800), electricity for pumps and heating ($500-$1,500), and water ($200-$500). Add $500-$1,000 for repairs and servicing.

Are above-ground or inground pools cheaper?

Above-ground pools cost $1,500-$15,000 installed, while inground pools start at $25,000. However, above-ground pools have a shorter lifespan (7-15 years vs 25+ years) and add less value to your home.

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Pool Cost Calculator

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Reviewed by Tom Martinez, Pool Maintenance Expert | Last Updated: November 2025

Planning Your Pool Investment

A swimming pool is a major investment that can enhance your home's value and quality of life. However, the initial construction cost is just the beginning—ongoing maintenance, chemicals, and utilities add up quickly.

💡 Expert Tip: The Hidden Costs

"Don't underestimate ongoing costs. A typical 20x40 pool costs $1,500-$3,000/year just for chemicals, electricity, and water. Add $500-$1,000 for repairs. If you heat the pool, expect another $1,000-$2,000/year."

Common Mistakes to Avoid

Forgetting Excavation Costs: Digging and hauling dirt can add $5,000-$15,000 depending on soil conditions and access. Rocky terrain costs even more.
Ignoring Permits & Inspections: Pool permits cost $200-$1,000. Skipping them can result in fines and forced removal of the pool.
Underestimating Chemical Costs: Chlorine, pH balancers, and shock treatments cost $300-$800/year. Saltwater systems reduce this but have higher upfront costs.

Frequently Asked Questions

Does a pool add value to my home?

In warm climates (Arizona, Florida, California), pools can add $20,000-$50,000 in value. In cooler regions, they may break even or decrease value due to maintenance concerns.

How long does a pool last?

Inground pools last 25-50+ years with proper maintenance. Vinyl liners need replacing every 7-10 years ($4,000-$5,000). Above-ground pools last 7-15 years.

What's better: chlorine or saltwater?

Saltwater systems cost $1,500-$2,500 more upfront but save $300-$500/year on chemicals. The water feels softer and is gentler on eyes and skin.