I’m Sean, and building pools is the family business. My grandfather Charles started it, my dad carried it on, and now it’s my turn: more than 60 years and three generations of digging, framing, and finishing backyards across the East Bay. In all that time, one method has stayed at the center of what we do: gunite.
This isn’t a sales pitch. It’s just how we think about pool construction after doing it for so long. So let me walk you through what a gunite pool actually is, why we’ve chosen to specialize in it, how it compares to other options, and what it costs to build a gunite pool here in the Bay Area. My goal is simple: help you make a good decision, whether or not you build with us.
What Is a Gunite Pool?
A Gunite pool is built on site, from the ground up, rather than dropped into your yard as a pre-formed shell. Here’s the basic idea: we dig a hole in the earth, then build a grid of steel reinforcing bars, called rebar, that forms the pool’s skeleton. Within that framework, we spray a dry mix of cement and sand, combined with water, right at the nozzle. That sprayed application is what “Gunite” refers to. In the wider construction world, it’s a form of shotcrete, the same category documented by the American Shotcrete Association for structural work.
Once the shell cures, we finish the interior surface with plaster, quartz, or pebble, then add tile and coping around the edge. Because every step happens in your backyard, the pool is truly built to fit your space, not the other way around.
Why We Specialize in Gunite
After three generations, gunite is the method we trust. Here’s why we keep coming back to it.
- Unlimited customization. Gunite takes any shape, size, or depth you can imagine. That flexibility matters here, where sloped and irregular lots around Concord and the East Bay are the norm rather than the exception. We build the pool in your yard, not to a mold.
- Built to last. A properly built gunite pool holds up for decades. The concrete shell isn’t a wear item you plan to replace. It’s the permanent structure to which everything else attaches.
- Structural strength. The rebar-and-concrete shell is strong enough to handle Bay Area soil conditions and hillside builds, where ground movement and slope put real demands on a pool.
- Finish flexibility. You choose the interior surface and the look that comes with it: plaster, quartz, or pebble. (I get into the differences in our guide to pool finishes.)
- Features integrate naturally. Spas, waterfalls, tanning ledges, and beach entries aren’t add-ons bolted onto a gunite pool. They’re formed right into the structure.
When you can shape the shell however the design calls for, the backyard starts to feel like it was always meant to be there. That’s the part I love.
Gunite vs. Other Pool Types
Every pool type has its place, and I’m not going to knock the alternatives; they solve real problems for real budgets. But it helps to understand the trade-offs honestly.
| Gunite | Vinyl liner | Pre-formed shell | |
| Upfront cost | Higher | Lower | Moderate |
| Shape & size | Fully custom | Limited | Fixed by mold |
| Build time | Longer | Shorter | Shorter |
| Longevity | Decades | Long shell; liner replaced periodically | Long, but shape is set |
Gunite vs. Vinyl Liner
Vinyl liner pools usually cost less to install, and for some homeowners, that’s the deciding factor. The trade-off is the liner itself: it’s a surface that wears and needs to be replaced on a cycle over the life of the pool. Gunite skips that cycle entirely. The finished concrete shell is the pool.
Gunite vs. Pre-Formed Shells
A pre-formed shell can go in faster because it arrives already made. The catch is that “already made” also means “fixed”: you’re choosing from a set of shapes and sizes. Gunite is built to your yard, which is exactly why it suits sloped lots and one-of-a-kind designs. If customization and longevity are what you’re after, gunite is the choice; if speed and a lower entry price matter most, another type may fit you better.
How a Gunite Pool Is Built
People are often surprised by how much goes into a gunite build. Here’s the sequence we follow for a typical gunite pool build, the heart of our Gunite Inground Pools service, from first sketch to first swim.
- Design & 3D plan. We map out shape, depth, and features so you can see the pool before we break ground.
- Permits & layout. We pull the required permits and stake out the exact footprint in your yard.
- Excavation. We dig the hole to the design’s contours.
- Steel rebar framework. We tie the rebar grid that forms the pool’s skeleton.
- Gunite application. We spray the cement-and-sand mix over the steel to form the shell, then let it cure.
- Plumbing & equipment. We set the pipes, pumps, filtration, and any heating or automation.
- Finish, tile & coping. We apply the plaster, quartz, or pebble interior, then set tile and coping.
- Fill & startup. We fill the pool, balance the water, and start the system.
Every one of those steps is where experience shows. It’s also what makes a new pool and spa installation worth doing right the first time.
What Gunite Pools Cost in the Bay Area
I won’t quote you a price in a blog post, because a straight answer depends on your yard. Anyone who gives you a flat figure sight unseen is guessing. What I can do is tell you what moves the cost:
- Size and depth of the pool
- Shape complexity: simple rectangles cost less than free-form designs
- Interior finish: plaster, quartz, and pebble sit at different price points
- Features: spas, waterfalls, tanning ledges, lighting, and automation
- Site access: how easily equipment reaches your backyard
- Soil and slope: hillside and challenging soil conditions add engineering challenges
- Permits: requirements vary by city across the Bay Area
Every lot in Concord and the wider Bay Area is different, so the best way to get a real number is a free consultation, where we look at your actual space and talk through what you want. That’s the only way I know to price a custom pool fairly.
Caring for a Gunite Pool
A gunite pool is durable, but it still benefits from a little routine. The basics are straightforward: brush the interior surfaces regularly to keep them clean, and maintain balanced water chemistry so the finish and equipment stay healthy. Balanced water does more for a pool’s lifespan than almost anything else.
Over time, the interior finish naturally ages. Most gunite pools benefit from resurfacing every 7 to 15 years, depending on the finish, with plaster on the shorter end and pebble on the longer end. When that time comes, resurfacing restores the surface without affecting the structural shell beneath, which is the beauty of gunite. When you’re ready, that’s where our pool and spa renovation and resurfacing work comes in.
FAQ: Gunite Pools
What is a gunite pool?
A gunite pool is an inground pool built on site from a steel-reinforced framework, sprayed with a cement-and-sand mixture, then finished with plaster, quartz, or pebble. Unlike pre-formed shells, it’s constructed in your yard so that it can be built to any shape, size, or depth.
How long do gunite pools last?
A properly built gunite pool lasts for decades. The concrete shell is the permanent structure, so the pool itself isn’t something you replace. The interior finish ages over time and is renewed through resurfacing, while the shell remains in place.
Is gunite better than concrete?
This is a common mix-up: gunite is a type of concrete used for pool construction. “Gunite” describes how the concrete is applied (sprayed as a dry mix that meets water at the nozzle), not a different material. So comparing gunite to “concrete” is really comparing application methods within the same family.
How much does a gunite pool cost in the Bay Area?
There’s no single price because costs depend on size, shape, complexity, finish, features, site access, soil, slope, and local permits. Rather than guessing, we give you a real figure after we see your yard during a free consultation.
How long does it take to build a gunite pool?
A gunite build takes longer than dropping in a pre-formed shell because each step (excavation, steel, gunite, plumbing, finish) happens on site, and some stages need curing time. The exact timeline depends on the design’s complexity and your site conditions.
Do gunite pools need resurfacing?
Yes. The structural shell lasts for decades, but the interior finish ages and is typically resurfaced about every 7 to 15 years, depending on the finish. Plaster sits at the shorter end of that range, and pebble at the longer end. Resurfacing refreshes the surface and appearance without rebuilding the pool.
Can a gunite pool be built on a sloped lot?
Yes, and this is one of gunite’s biggest advantages in the Bay Area. Because the shell is formed on-site, over-engineered steel and gunite handle sloped and hillside lots that fixed shells struggle to accommodate. It’s often the most practical way to put a pool on a challenging site.
Let’s Talk It Through
Gunite is what my family has built for three generations. As a Concord gunite pool builder, I still believe it’s the best way to put a pool in the ground, especially on the kind of lots we see around here. But the right pool is the one that fits your yard, your budget, and how you plan to use it, and just as important is knowing how to choose a pool builder you can trust with the work. The only way to sort that out is to talk.
Gunite is unforgiving of shortcuts, which is why it pays to work with experienced pool contractors in the Bay Area who build it every week.
If you’re weighing a gunite pool for your backyard, call or text me at 925-212-0789 for a free consultation and estimate. I’d be glad to walk your space with you and give you an honest take. You can also reach us through our contact page.
