Pool and Spa Builder in Sienna, TX

Attached gunite spas share plumbing, equipment, and structure with the pool they sit next to - which is a completely different animal than a portable hot tub. Done right, they spill into the pool as a feature, hold temperature independently, and pair with the pool schedule through automation. In Sienna, that work is pool and attached spa construction for a specific yard in Fort Bend County, not a city name pasted onto a stock plan. Sienna's master-planned neighborhoods have consistent lot sizes that suit standard-footprint gunite pools with nice deck expansion room.

A properly built attached spa is a small gunite shell tied structurally into the pool but plumbed as its own body of water. That's what allows the spa to hold 102°F while the pool sits at 82°F, and what lets automation route the spa's spillway back into the pool as a moving-water feature. Jet count, blower sizing, and heater capacity all follow the spa volume - under-sizing any of them turns a spa into a lukewarm bath. Placement is a design decision: raised spas above the pool coping give a dramatic spillover; flush spas with a raised bond beam read cleaner from the house; free-standing spas set apart from the pool work when the geometry calls for it. Because the spa shell is built with the pool, it inherits the same warranty and permitting rigor - none of the leak-prone gasket seams that plague DIY combos.

An attached gunite spa is its own body of water tied into the pool structure. That is what lets it hold around 102°F while the pool stays in the 80s, and what lets a spillover run back into the pool as a water feature. A portable tub sitting on the deck is a different object with a different leak path.

Jets, the blower, and the heater are sized to the spa’s volume. Undersize them and you have a lukewarm bath with weak jets. Raised spas give you the spill and the view. Flush spas read quieter from the house. Both are real gunite, permitted with the pool.

If the spa is a remodel on an existing pool, the shell is cut and new steel is tied in. That is not a weekend finish upgrade.

Hiring a pool builder in Houston is a construction decision, not a catalog order. The companies that show up for “pool contractor,” “swimming pool construction,” and “custom pool builder” are not all selling the same thing. Some install a fiberglass shell that arrives on a truck. Some sell a package shape. Houston Cool Pools designs and builds gunite: a steel cage, then a concrete shell sprayed on your lot, then tile, coping, deck, and an interior finish. The shape is whatever the drawing says, because there is no mold.

Fiberglass is a legitimate product. It is also a different product. The shell is manufactured off-site, so the widths, depths, and steps are the ones the mold allows. Gunite is the method behind the custom pools people are usually picturing when they search for a pool builder in Houston: a beach entry on one side, a spa on the other, a sun shelf where the shade actually falls, a raised bond beam if the house sits above the yard. If a salesperson cannot explain which method they build, you do not have a proposal yet.

The design visit is where most of the expensive mistakes are avoided. We look at where water already sits after a storm, where the afternoon sun lands, what you see from the kitchen and the primary bedroom, and whether a fence, a tree, or an easement cuts the usable yard. Equipment has to reach the hole. On a wide suburban lot that is simple. On a fenced inner-loop lot it can decide the shape before the finish does. Bring the survey if you have one, and the HOA architectural rules if the neighborhood has them. We would rather read the rule before we draw than redraw after a committee.

A gunite build follows a sequence, and skipping a step is how pools fail later. Layout and excavation come first. The hole is cut larger than the finished water so the steel and the shell have room. Rebar is tied to the engineered spacing. Plumbing is stubbed and pressure-tested while it can still be seen. Gunite is then sprayed so the steel sits inside the shell, not against one face of it. The shell cures before tile, coping, and deck go on. The interior finish — plaster, quartz aggregate, or pebble — is a wear surface over that structure, not the structure itself. Startup is a separate appointment: the equipment is run, the chemistry is set, and someone walks you through the pump, filter, heater, and light. Video is fine. There is a lot of it.

Greater Houston is not a gentle site. A lot of the metro sits on clay that shrinks when it dries and swells when it rains. The shell is built for that. The deck is not glued rigidly to the coping; a joint there is what keeps the first dry summer from telegraphing a crack across the walking surface. Drainage has to leave the bond beam and the equipment pad. A pool that holds storm water against the shell is a maintenance problem you will notice every June.

Permits follow the address, not the marketing map. A house inside the City of Houston is not reviewed by the same desk as a house in unincorporated Harris County, and Montgomery, Fort Bend, Waller, Brazoria, Galveston, and Chambers counties each have their own path. We confirm the jurisdiction before drawings are submitted and we schedule the inspections that jurisdiction requires. You should not be the person standing in the yard wondering which inspector is coming.

Schedule for a custom gunite pool is generally 8 to 16 weeks from the day we break ground to the first swim. Weather, inspection timing, and the number of features move that window. An attached spa, a vanishing edge, or a difficult access path adds time. A straight rectangle on an open lot does not. We give you the sequence before we dig, and the backyard should not go quiet without you knowing which trade is next.

Houston Cool Pools publishes new-pool project ranges at $65k–$90k, $90k–$115k, $115k–$150k, and $150k and up. Those are ranges of finished projects, not a bid for your yard.

What moves a new gunite pool from one range to the next is concrete: water-surface size, whether there is an attached spa, the deck material, the interior finish, and how hard it is to get equipment into the backyard.

A remodel, a resurface, a deck replacement, or an equipment change is priced from the existing pool, not from those new-build ranges. If the shell has to be cut and new gunite tied in, the job starts to look like construction again and the schedule changes with it.

Financing is available for qualified homeowners. A monthly payment is not a reason to skip the design conversation. The number only means something after the drawing shows the size, the depth, and the deck. Our office is at 21902 Highway 249, Houston, TX 77070. The phone on this website is (281) 645-6631.

Sienna (Master-planned community south of Missouri City) is one of the places we build. The notes below are the site conditions that change pool and attached spa construction here. They are not a slogan with the city swapped in.

Sienna is a master-planned community in Fort Bend County south of Missouri City. The association’s architectural rules are part of the project. So is a consistent lot pattern: fences, easements, and a rear yard that looks like the neighbor’s until you measure it.

Measure it. A standard Sienna back can hold a gunite pool and a modest deck if the setbacks are drawn first. Copying a pool from a different section of the community is how people discover a conflict at review.