What Pool Features Are Worth Deciding Early?

TL;DR: Features that must be decided before construction begins — because they require structural integration, specific plumbing, or deck-level planning — include: spa integration, vanishing edge design, beach entry, automatic safety cover, in-deck water features, and niche-mounted underwater lighting. Features that can be decided later include: outdoor kitchen, freestanding pergola, most landscaping, and most equipment upgrades. Getting the irreversible features locked in before the first shovel enters the ground saves $15,000–$50,000+ in retrofit cost. Scott Payne Custom Pools walks every PA and NJ client through this list explicitly during the design phase.

The design phase of a pool project has two types of decisions: those that need to be made before construction begins and those that can wait. Confusing the two is expensive. Features that require structural integration — built into the gunite shell, the plumbing, or the deck hardscape — cost two to three times as much to add after construction as they do to include from the start. Features that don't require structural integration can genuinely be deferred with minimal penalty.

Here's the specific list, with the rationale for each.

Must Be Decided Before Construction

Integrated Spa

The spa is the most financially consequential early decision in most pool projects. An integrated gunite spa — built as part of the pool structure, sharing plumbing and equipment — costs $18,000–$30,000 added at original construction. The same spa added to an existing pool costs $30,000–$55,000 because the work requires excavating adjacent to the existing shell, new plumbing runs, equipment modifications, and hardscape reconstruction.

The decision to include a spa needs to happen before the pool is designed, because the spa's position affects the pool's shape, the plumbing routing, and the deck layout. A spa decided after the shell is poured cannot be seamlessly integrated — it's always a retrofit.

Vanishing Edge / Infinity Edge

A vanishing edge is perhaps the most planning-intensive feature in pool design. The hydraulic engineering, catch basin construction, secondary pump system, and precision-leveled edge wall must all be designed into the original project. Adding a vanishing edge to an existing pool requires rebuilding pool wall sections, constructing a catch basin beneath the edge, and adding a separate pump system — typically $40,000–$70,000+ in retrofit cost. Design it in from the beginning or don't build it.

Beach Entry / Zero-Entry Slope

A beach entry — the gradual slope from deck level to pool floor that mimics a natural water's edge — requires specific excavation geometry and shell formation that cannot be added to an existing pool without major demolition. The decision must be in the design before excavation begins.

Automatic Safety Cover

An automatic safety cover system uses tracks recessed into the deck surface and a motorized box at one end of the pool. Both require planning into the hardscape design before the patio is poured. The tracks must align precisely with the pool edge, which means the cover system must be specified before deck construction begins. Retrofitting tracks into existing concrete or stone decking requires cutting and reconstruction — expensive and sometimes aesthetically disruptive.

Niche-Mounted Underwater Lighting

Underwater pool lights mount in a niche — a housing built into the pool wall at the time of gunite construction. You cannot add a niche to an existing pool wall without cutting through the shell, which is expensive and structurally disruptive. If you want underwater lighting (and you should — it transforms the pool experience after dark), the number and placement of light niches must be in the design before gunite day.

In-Deck Water Features (Deck Jets, Bubblers)

Deck jets and bubblers are plumbed into the pool deck with supply lines running beneath the hardscape. These supply lines must be installed before the hardscape base is poured. Adding deck jets to an existing patio requires cutting through finished hardscape, running new plumbing, and patching — expensive and rarely invisible.

Main Drain Configuration

Under federal law (Virginia Graeme Baker Pool Safety Act), pools must have anti-entrapment protection — either dual main drains separated by at least 3 feet or a single anti-vortex drain cover. The drain housing is cast into the pool shell during gunite construction. The position of the main drain(s) affects circulation efficiency and cannot be changed after the shell is complete.

Can Be Decided Later (Deferrable Features)

Outdoor Kitchen

An outdoor kitchen is built on top of existing hardscape — typically a concrete masonry unit (CMU) frame with countertop and appliance installation. As long as the gas line and electrical service reach the area, an outdoor kitchen can be built on an existing patio at any point after pool construction. The premium for doing it later versus at the time of pool construction is modest — primarily mobilization cost.

Freestanding Pergola or Shade Structure

Pergolas and pavilions attach to the ground or to existing structures. They don't require integration into the pool shell or deck sub-base. Building one three years after the pool is complete is completely feasible and at similar cost to doing it at original construction.

Landscaping

Virtually all landscaping — trees, shrubs, perennials, lawn — can be phased. In fact, some landscaping is better deferred until construction disruption is complete and final grades are established.

Most Equipment Upgrades

Pump upgrades, heater replacements, automation system additions, and salt system retrofits can all be done after the pool is built. These are inline equipment changes that don't require structural work.

Frequently Asked Questions

If we're undecided about the spa, should we at least rough-in the plumbing for one?

Yes — this is one of the smartest deferral strategies available. For a modest additional cost at construction ($1,500–$3,000), your builder can rough in the plumbing runs and conduit for a future spa without building the spa structure itself. If you decide to add the spa later, the most expensive part of the retrofit (excavating and running new plumbing) is already done. Ask your builder explicitly about this option.

What about adding a water feature like a sheer descent waterfall later?

A sheer descent waterfall that flows from the pool coping can sometimes be retrofitted — the supply plumbing can be run through the deck and the spillway positioned at the coping. The cost is higher than at original construction but more feasible than structural features. Natural rock waterfalls that are integrated with the pool shell are much harder to retrofit. Ask your builder to assess feasibility for your specific design.

We're not sure about the automatic cover. Should we at least plan for it in the deck design?

Absolutely. Tell your builder "we're considering an automatic safety cover and want to preserve the option." The builder can design the deck layout so that track installation remains possible — specifically, ensuring adequate flat deck area on both long sides of the pool and space for the cover box at one end. Planning for the option costs nothing and keeps the door open.

Is there anything we can decide early to save money even if we're not sure we want it?

Electrical conduit. Running extra conduit during construction (for future lighting circuits, equipment circuits, or outdoor entertainment wiring) costs very little when the trench is already open during excavation and plumbing installation. Running conduit through finished hardscape and landscaping later costs $800–$2,500 per run. If there's any chance you'll want outdoor audio, additional lighting zones, or future equipment, ask your builder to run spare conduit at construction.

---