Pool type · Small, plunge & lap

Small Pools and Plunge Pools

A plunge pool is a small, deep-enough-to-sit pool for cooling off and soaking; a small pool or lap pool trades width for swimming length. They fit lots where a full pool won't clear the setbacks. Golden Yards' editorial range for plunge pools is $25,000–$40,000+.

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Plunge, small or lap?

	Plunge	Small pool	Lap pool
Typical use	Cool off, soak, heated spa-style	Play, cool off, short swims	Exercise swimming
Footprint	Under about 12 ft	e.g. 12×24	Long and narrow
Fits	Courtyards, side yards	Most suburban yards	Along a property line
Cost cue	$25,000–$40,000+	$45,000–$70,000+	Length drives it

Fitting a pool inside the setbacks

Draw the setbacks before you fall in love with a size:

Contra Costa County (Alamo, Blackhawk, Diablo): 5 ft from side and rear property lines to the water's edge (County handout)
Walnut Creek: no pools in a required front or street-side yard (WC zoning §10-2.3.112)
Easements, utility lines and the equipment pad all take space
The required safety barrier needs room around the water

Rules by jurisdiction →

Fiberglass or gunite for a small pool?

Small fiberglass models are a fast, tidy option where a truck or crane can reach. Gunite lets you fit an odd-shaped corner, add a bench all the way around, or build a raised plunge that doubles as a spa. Fiberglass pools · Custom gunite

Heated plunge pools

Many plunge pools here are built to be heated, used like a large spa in winter and a cold plunge in summer. Plan the heater, a good cover and the controls up front; a heat pump suits steady warmth, gas suits quick heat-ups.

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Small pool questions

How much does a plunge pool cost?

Golden Yards' editorial planning range for a plunge or cocktail pool (under 12 ft) is $25,000–$40,000+. Heating, a cover and decking push it up; easy access and a simple shape keep it down.

How much does a small inground pool cost?

A compact 12×24 pool runs $45,000–$70,000+ in Golden Yards' ranges. Small doesn't scale price down evenly: permits, engineering, equipment and the safety features cost about the same as on a bigger pool.

Can a small backyard fit a pool?

Often, if the pool clears the setbacks. Contra Costa County requires 5 ft from side and rear property lines to the water's edge, and Walnut Creek doesn't allow pools in a required front or street-side yard. Add room for coping, deck, equipment and the barrier.

Sources

Read October 2026. Rules and prices change; confirm current requirements with the agency and your builder.

Next step

See what fits your yard

Share a few details about the yard and the pool you have in mind. A local pool builder will call to talk through design, site access and budget, then quote it.

Prefer to talk it through?

Call (925) 492-7114