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Our spillover spa installation services build a raised, heated spa right alongside your pool, connected so the spa’s water pours over a spillway back into the main pool. It is the setup many people mean when they search for a pool with an integrated hot tub. Because the two share filtration and heating, there is one equipment pad to look after instead of a separate tub with its own water, chemicals and wiring. A spa also stretches your swim season, since it heats much faster than the pool and stays comfortable on cool spring and fall evenings. Explore the full range of pool water features too.
A look at pools, spas and outdoor spaces from our own projects. Notice how each spa sits relative to the house, the deck and the view. Placement is one of the biggest decisions in spa design.
Many homeowners start out picturing a standalone hot tub. Here is what usually changes their mind once they compare the two side by side.
// Areas We Serve
We work with homeowners across northeastern Massachusetts and southern New Hampshire. Pick your town to see local details, or ask us if yours is not listed.
The spa is designed with the pool: size, seat layout, footwell depth and which way the spillway faces. In a gunite build, the spa shell is formed and sprayed along with the pool, then the raised walls get stone or tile. Spa plumbing includes its own suction and return lines, jet lines and valves that switch between modes. In spa mode, heated water circulates in the spa alone so it warms quickly. In pool mode, return water flows through the spa and spills into the pool. A licensed electrician wires the heater, pumps and lights, and the spa is included in the pool barrier plan.
Why Work With Us
We build gunite, fiberglass and vinyl liner pools, so we can tell you which spa approach suits your pool type and budget. The spa, deck, walls and planting around it are designed by one team.
Water can pour over a sheer edge, a stone lip or a wide spillway that runs the length of the spa wall.
Bench seats at different depths, a lounger or a corner seat, sized for the number of people you expect.
Directional jets along the seat backs, plus optional air bubbles, driven by a pump that runs only when you want it.
Gas heaters warm a spa quickly for on-demand use. Heat pumps cost less to run but take longer. We explain the tradeoffs.
Natural stone veneer, tile or stone that matches the coping and deck, so the spa looks built in.
An underwater light in the spa makes evening soaks safer and shows off the spillover after dark.
Can spillover spa installation be added to an existing pool?
Sometimes. A new spa needs room beside the pool, its own plumbing and a valve setup tied into your equipment, plus a heater if you do not have one. On many pools that work fits best within a larger pool remodeling project. We assess your pool and equipment before recommending it.
What is the difference between a spillover spa and a hot tub?
A hot tub is a standalone unit with its own water, filter, heater and cover. A spillover spa is built into the pool, shares its water and equipment and pours into it. The spa looks like part of the pool design and adds the sound of moving water.
How fast does a spillover spa heat up?
Much faster than the pool, because the spa holds far less water and is isolated by valves while heating. The exact time depends on the heater type, spa size and air temperature. Gas heaters are quickest, and heat pumps are slower, especially in cold weather.
Can I use the spa in winter?
Some homeowners keep the spa running into the cold months, but because it shares plumbing with the pool, the system has to keep running and stay protected from freezing. Most close the spa with the pool in fall. We talk through what suits you before you decide. See our opening and closing page.
Do spillover spas work with fiberglass or vinyl liner pools?
Gunite is the most flexible, since the spa can be any shape. Many fiberglass pools have matching spa shells made to sit beside them. With vinyl liner pools, the spa is usually built separately and plumbed to spill into the pool. Learn more about gunite pools.
Does a spa need a fence or safety cover?
A spillover spa is part of the pool, so it falls within the barrier and fencing rules that apply to the pool under the state building code. A spa cover also holds in heat and keeps debris out. We plan both during design and permitting.
