In Houston, a custom gunite pool with an attached spa generally costs about $65,000 to $125,000 or more, based on what local builders publish in 2026. Astorga pool and spa packages start at $60,000 for an 80-foot-perimeter gunite pool with an attached 7-by-7-foot spa. Size, finishes, decking, and your lot move the number from there.
Why you won’t find a spa-only price
Search for the cost of a gunite spa and most of what comes back is about hot tubs, which are a different product: a factory-made tub that sits on a slab. An inground gunite spa attached to a pool is built as part of the pool. It shares the shell, the plumbing runs, the equipment pad, and the permit.
That is why builders price it inside a project instead of as a line you can buy alone, and why the useful comparison is the same pool with and without a spa. It is also why we do not publish a spa-only number. Any figure we gave you would be missing the pool it is attached to.
What a spa adds to the project
A spa moves more than one line on a proposal at once:
- Shell and structure. More steel and gunite, a dividing wall between the spa and the pool, benches formed at sitting depth, and raised walls if the spa sits above the waterline.
- Plumbing. The spa gets its own suction and return runs, dedicated jet lines, and the valves that isolate it from the pool so it can heat and run on its own.
- Jets, and a pump to drive them. Spa jets usually get a dedicated pump, because the pool’s circulation pump is sized for a different job.
- A heater sized for the spa. Houston spas earn their keep from October through March, so the heater gets sized for a quick evening heat-up, not a July afternoon. A gas heater also needs a gas line run to the equipment pad.
- Controls and automation. Valves and a controller that let the spa run separately from the pool, including starting it from your phone before you leave work.
- Coping, tile, and the deck. A raised spa has exposed faces that need tile or stone and coping on top, and the deck has to meet the spa where you actually step in.
- Spillover and water features. A spillover needs a formed edge for the water to cross; a perimeter-overflow spa, where water slips over every side, changes the structure and the plumbing and has to be decided before engineering.
Pool only, or pool and spa: what published pricing shows
| Scope | What it includes | Published Houston range |
|---|---|---|
| Pool only, essentials | Gunite pool, plaster interior, standard pump, filter and sanitation, 500 square feet of concrete decking | $45,000–$65,000 |
| Pool with an attached spa | The pool grows a little, an integrated spa with its own jets, heater and controls, often a tanning ledge and a first water feature | $65,000–$80,000. Astorga pool and spa packages start at $60,000. |
| Pool, spa, and the rest of the yard | Pebble interior, travertine or paver decking, fire and water features, outdoor kitchen and covered structure planned as one build | $80,000–$125,000 and up |
These are third-party published market bands from the sources at the bottom of this page, not Astorga quotes. The one Astorga figure is our own published starting price. The full picture, including the drivers behind each band, is in how much a pool costs in Houston.
Spa size: how many people, really
- 6 by 6 feet seats four to five adults. It is the compact choice for tighter lots.
- 7 by 7 feet seats about six adults comfortably, and it is the most common family size.
- 8 feet and up handles larger gatherings with more elbow room.
Size moves cost through structure, tile, and the amount of water the heater has to bring up to temperature. It matters less than people expect compared with layout. Bench depth, jet placement, and how you step in decide whether the spa gets used. More on that on our pool and spa page.
Raised, flush, or spillover
A raised spillover spa is the classic Houston look. It sits above the waterline, spills into the pool, and gives the yard a focal point and the sound of moving water. It also has exposed walls to finish and a spillway to form, which is scope a flush spa does not carry.
A flush spa sits level with the pool, reads cleaner against modern architecture, and is easier to step into. A perimeter-overflow spa, where water slips over the edge on every side, is the premium version and has to be decided early because it changes the structure and the plumbing, not just the finish.
None of these is right by default. A spillover reads best from inside the house on a bigger lot. A flush spa suits tight geometry. It is a design decision, and it belongs before engineering.
Equipment: where a spa budget quietly moves
The heater is the big one. It has to be sized for the spa, and a gas heater needs a gas line run from the meter to the equipment pad, which is a real cost on lots where the meter sits on the far side of the house. After that come the jet pump and the automation that ties it together. We list equipment in the proposal by model, so there is nothing vague to argue about later.
Finish and decking around a spa
The spa is normally finished in the same interior as the pool. Plaster is the economical baseline, and pebble adds cost and durability. A raised spa also needs coping on top and tile or stone on the faces you can see.
Then there is the deck. A spa you have to climb over a wall to reach gets used less than one that meets the deck, so plan the approach: where you walk from the back door in January, where towels go, and whether there is room to sit on the edge.
Questions to ask before you add a spa
- How many people will actually use it at the same time?
- Will you use it in winter? That decides the heater, and the gas line that feeds it.
- Where will you see it from? A raised spillover is a view from inside the house. A flush spa disappears into the pool.
- How do you get in, and is that easy at night?
- Where does the equipment go, and how far is that from the gas meter?
- Attached or standalone? A standalone spa can run hot all year without heating the pool, and it can sit closer to the house.
- Is the spa in the quote by size, with the heater and the jet pump named by model?
Can you add the spa later?
Sometimes, but treat it as a remodel and not an add-on. Adding a spa to an existing pool means cutting into a finished shell, and whether that makes sense depends on how the pool was built, the soil, access to the yard, and what the change does to the plumbing. If a spa is a maybe, tell us during design. Deciding on paper is free. Our pool remodeling page covers what a later addition involves.
A spa is one budget decision among several. How we design a custom pool walks through the rest in order, and the financing page explains where a lender fits in.
Common questions
What size spa fits six adults comfortably?
As a working rule, a 7×7-ft spa seats about six adults comfortably; 6×6 suits four to five, and 8-ft-plus spas fit larger groups with more elbow room. Bench layout matters as much as footprint, so we size it around how you’ll actually use it.
Does a spa change the budget much?
Yes. A spa adds shell structure, dedicated jets, a larger heater, and controls, which is why pool-plus-spa packages price meaningfully above pool-only builds across published Houston pricing.
What does an Astorga pool and spa package cost?
Our smallest pool and spa package starts at $60,000: an 80-foot-perimeter gunite pool with an attached 7-by-7-foot spa. Size, finishes, features, and site conditions move the number from there, which is why the price that matters is the one in a written proposal after a site walk.
Is it cheaper to add a spa later?
Usually not. Building the spa with the pool is one excavation, one shell, one equipment pad, and one permit. Adding it later means cutting into a finished shell, running new plumbing, and mobilizing a crew a second time, and whether it is even sensible depends on how the original pool was built. If a spa is a maybe, say so during design, when changing the plan costs nothing. What a later addition involves is covered on our pool remodeling page.
Does a spa raise the monthly cost of owning a pool?
Mostly through the heater. An attached spa shares the pool’s water, filtration, and chemistry, so routine upkeep barely changes. What changes is energy: every winter evening you bring the spa up to temperature uses gas or electricity. How much depends on how often you use it and how the heater was sized. Our pool maintenance cost guide covers the drivers.
Price the pool and the spa for your yard.
Ranges tell you what is normal. A site walk tells you what your lot, your access, and your plans add up to, in writing.
Prefer to start with a question? Use the contact page.
Sources
- Ocean Blue Pools, published pricing tiers: obpi.com (accessed Aug 2026)
- Platinum Pools, price-band project galleries: platinumpools.com (accessed Aug 2026)
- Avree Custom Pools, Express package pricing: avreecustompools.com (accessed Aug 2026)
- Houston Cool Pools, entry-tier pricing page: houstoncoolpools.com (accessed Aug 2026)
- Angi, inground pool cost guide: angi.com (accessed Aug 2026)
- Anthony & Sylvan, pool cost guide: anthonysylvan.com (accessed Aug 2026)
Reviewed: September 2026. Market ranges are third-party published figures, not Astorga quotes.