Hot Tub vs. Spa vs. Jacuzzi: What’s the Difference?

The terms get used interchangeably, but they actually mean different things. Here’s the clear breakdown — plus what’s right for your Utah backyard.

The Quick Definitions

• Hot tub — generic term for any small heated water tub designed for sitting in
• Spa — same thing as hot tub; “spa” is the more current industry term, especially for in-ground or attached
• Jacuzzi — a brand name (Jacuzzi Brothers, founded 1956). Like calling all tissues “Kleenex”
• Swim spa — larger spa with a current-generating jet for swimming in place

Types of Hot Tubs / Spas

Portable / Above-Ground Hot Tubs

Self-contained acrylic shells with built-in heating, plumbing, and jets. Bought, delivered, set on a concrete pad, plugged in, filled. Cost: $5,000-$25,000 depending on size and features.

• Pros: Move with you, no construction, lower upfront cost
• Cons: Less integrated, dated look in a backyard, smaller jet count

In-Ground Spas (Standalone)

Built into the ground like a small pool. Concrete, fiberglass, or vinyl construction. More integrated look, custom shapes possible. Cost: $20,000-$50,000.

• Pros: Permanent, custom design, premium aesthetic
• Cons: Higher cost, can’t move, requires gas + electrical run

Pool-Attached Spas

Spa shares wall with the pool, often raised slightly above. Water cascades from spa to pool. Often shares pool’s filtration but has independent heating. The most common premium option in Utah pool builds. Cost as part of pool: add $15,000-$35,000.

• Pros: Beautiful integration, year-round use, shares equipment
• Cons: Locked in at pool design (can’t easily add later)

Swim Spas

Larger spa (12-19′ long) with current-generating jet at one end. Swim against the current. Combine the spa experience with a swim workout in a smaller footprint than a true pool. Cost: $25,000-$60,000.

• Pros: Year-round swim + spa, smaller footprint than pool, no separate spa needed
• Cons: Not a “real” pool; current swimming is acquired taste

Year-Round Use in Utah

All spas can be heated year-round, including in Park City and Heber winters. Most use natural gas or electric heating. Operating cost: $50-$200/month depending on insulation, cover quality, and use frequency.

Which Is Right for Your Utah Backyard?

• Building a new pool? Add an attached spa during the design phase. Easier and cheaper than adding later.
• Have a pool, want a hot tub? Add a portable hot tub on a deck pad nearby, OR plan a future renovation to add an attached spa.
• No pool, want spa-only? Portable hot tub for fastest install. In-ground for premium look.
• Want spa + light swimming? Swim spa is the answer.

Operating Costs Compared

Building a pool? Talk to us about adding a spa — easier now than later →