New pool construction · Walnut Creek & the Lamorinda and Danville hills

Pool Builders in Walnut Creek, CA

A new inground pool in the Bay Area typically costs $75,200–$140,000+, with fiberglass starting lower and custom gunite pools with spas running higher (Angi, San Francisco data). Start with the real numbers, the permit and hillside rules, then get it quoted by a local pool builder.

Call (925) 492-7114 See what pools cost here →

3–6 monthstypical design-to-swim
2 of 7safety features required
5 ftCounty setback to water's edge

Start here

What are you planning?

Every pool here starts as a top-view plan. Pick the one closest to yours.

Custom gunite poolAny shape, any depth, sun shelf, raised spa, vanishing edge. The most design freedom and the longest build.Read more →Fiberglass poolA factory-made shell set by crane. Faster on site and smooth to the touch; limited to the shapes and widths that ship by road.Read more →Small or plunge poolFor tighter lots and setback limits. Cool off, soak, or swim against a jet without giving up the whole yard.Read more →Pool on a slopePiers, retaining walls, drainage and often a soils report. Where the view usually is, and where engineering sets the budget.Read more →Pool + spaAn attached spa adds Angi's $5,000–$20,000+ to the job, plus heating choices that matter year-round.Read more →

Cost

What a new pool costs in the Bay Area

$75,200–$140,000+

That's Angi's typical range for an in-ground pool in San Francisco, with an average of $104,000. Contractors in Walnut Creek, Danville and Lamorinda price from the same Bay Area labor market; the yard is what moves the number.

Full cost table and what drives it →

Angi (San Francisco) and Golden Yards (GY) editorial ranges. Real quotes can land below or above.
Pool	Typical range
Fiberglass	$55,000–$100,000+
Concrete (gunite)	$65,000–$120,000+
Plunge pool	$25,000–$40,000+ GY
Gunite + spa	$80,000–$130,000+ GY
Spa add-on	$5,000–$20,000+

Method

Gunite or fiberglass?

Gunite (sprayed concrete)

Any shape, size, depth, spa or vanishing edge
Best fit for steep or irregular lots
Longest build: steel, shell cure, tile, plaster
Concrete range: $65,000–$120,000+ (Angi SF)

Custom gunite pools →

Fiberglass (factory shell)

Fixed models; widths limited by road transport
Shell set in days once the hole is ready
Smooth gelcoat, no replastering
Fiberglass range: $55,000–$100,000+ (Angi SF)

Fiberglass pools →

Side-by-side comparison guide →

Permits & safety

The rules, at a glance

Who issues the permit depends on where the house sits, not the mailing address. Every new pool also has to meet the state's drowning-prevention law before final inspection.

Permits by jurisdiction →
New-pool safety requirements →

Walnut Creek: Building permit; no pools in a required front or street-side yard.
Alamo · Blackhawk · Diablo: Contra Costa County: 5 ft from side and rear lot lines to water's edge; engineer-stamped structural calcs.
Danville: Grading and drainage plan; soils report on slopes steeper than 5:1, fill, slide areas or drainage swales.
Lafayette · Moraga: Local planning review; County Building Inspection handles the building permit.
Everywhere: At least 2 of 7 drowning-prevention features (HSC §115922).

Process

How a gunite pool gets built

Eight phases, roughly 3–6 months end to end. Design and permits usually take longer than construction.

01DesignLayout, size, spa and decking on a scaled plan; equipment list.
02Engineering & permitsStructural calcs, soils report if the site needs one, plan check, HOA review.
03ExcavationDig, haul-off, layout check. Soil surprises show up here.
04Steel & plumbingRebar cage, suction and return lines, electrical bonding; inspections.
05GuniteConcrete shell sprayed in place, then left to cure.
06Tile & copingWaterline tile, coping stones, then decking around the pool.
07PlasterInterior finish (plaster, quartz or pebble) applied over the shell.
08StartupFill, balance water chemistry, commission equipment, final inspection.

What happens at each stage →

Areas

Walnut Creek, the Lamorinda hills and the Danville foothills

Lots here run from flat Walnut Creek parcels to steep, oak-covered Orinda slopes and HOA-governed Blackhawk estates. Each changes the permit path and the price.

Schematic, not to scale.

Before you sign

Check any builder's license

In California, pools and spas are built under the CSLB's C-53 Swimming Pool classification (or by a general building contractor). Look the license up, confirm it's active and bonded, and ask who will do the excavation, steel, gunite and plaster. California also limits the down payment on a pool contract to 10% or $1,000, whichever is less (CSLB).

Check a license at cslb.ca.gov ↗Bid checklist and red flags →

FAQ

Questions people ask

How much does it cost to build a pool in the Bay Area?

Angi's San Francisco data puts the average in-ground pool at $104,000, with most projects between $75,200–$140,000+. Fiberglass runs $55,000–$100,000+ and concrete (gunite) $65,000–$120,000+ in the same data. Hillside engineering, a spa, long haul-off and premium decking push a Walnut Creek or Lamorinda yard toward the top of those ranges. See the full cost breakdown.

Can I get an inground pool for $50,000?

Sometimes, if the pool is small and the lot is easy. Golden Yards' editorial ranges put plunge pools at $25,000–$40,000+ and a compact 12×24 pool at $45,000–$70,000+; Angi's San Francisco fiberglass range starts at $55,000. A flat yard with good side access, a modest deck and no retaining walls is the realistic $50,000 scenario. A full-size gunite pool with a spa is not.

What is the new pool law in California?

When a building permit is issued for a new pool or spa at a single-family home, California's Swimming Pool Safety Act (Health & Safety Code §115922) requires at least two of seven drowning-prevention features, such as an isolation fence, a safety cover, or exit alarms. The inspector checks them before final. The seven features, explained.

How long does it take to build a pool here?

Plan on roughly 3–6 months from design to first swim; that's the planning assumption in Golden Yards' California cost guide. Engineering, a soils report, HOA review and the permit queue usually take longer than the digging. Stage-by-stage timeline.

Do I need a permit for an inground pool in Walnut Creek?

Yes. Walnut Creek's list of work that doesn't need a permit covers only small portable pools; an in-ground pool needs a building permit, and the zoning code keeps pools out of required front and street-side yards. Unincorporated Alamo, Blackhawk and Diablo go through Contra Costa County instead. Permits by city.

Next step

Tell a builder about 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