A large inground pool, often around 20 by 40 feet, typically costs $70,000-$160,000, with many complete projects near $115,000. Excavation, pool material, decking, access for construction equipment, and regional labor rates drive the final price.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Large inground pool | $70,000 | $115,000 | $160,000 | About 20 by 40 feet; standard filtration |
| Shell and installation | $50,000 | $85,000 | $120,000 | Varies by vinyl, fiberglass, or concrete |
| Pool and basic deck | $70,000 | $115,000 | $160,000 | Typical installed project range |
What a 20-by-40-foot pool usually costs
A large pool with a basic concrete or paver surround commonly falls between $70,000 and $160,000 installed. A practical planning figure is about $115,000 for a rectangular pool with standard equipment, ordinary excavation, and a modest deck. A pool with premium finishes, heating, lighting, and expanded hardscape can exceed $200,000.
Material changes the estimate: a large vinyl-liner pool may start near $55,000, while a concrete pool with custom features can reach $180,000 or more. Fiberglass prices depend on whether a suitable large shell can be delivered and placed at the site. Assumptions: U.S. pricing, roughly 20 by 40 feet, standard access, and no major rock or groundwater issues. For a large pool, the shell is only part of the budget; decking and site work can add tens of thousands of dollars.
How excavation, shell, and decking shape the quote
Contractors may bundle work differently, so quotes should identify what is included. The ranges below describe common portions of a large-pool project, not fixed national line items.
| Quote component | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Excavation and soil hauling | $5,000 | $10,000 | $20,000 | Access, soil, and disposal |
| Pool shell and installation | $45,000 | $75,000 | $115,000 | Material and finish |
| Filtration and plumbing | $5,000 | $9,000 | $15,000 | Pump, filter, and plumbing |
| Decking and coping | $8,000 | $18,000 | $35,000 | About 600-1,000 sq ft |
| Electrical, permits, and startup | $3,000 | $7,000 | $13,000 | Local code and equipment |
Labor commonly represents a substantial share of installed pricing. A rough estimating method is ; pool crews and specialty trades may bill effectively at $75-$150 per hour per worker, though bids generally price the full project. Ask for a written scope that separates the pool, deck, equipment, and site restoration.
Why depth, soil, and pool material change the price
Size is not the only cost driver. A 20-by-40-foot pool with an average depth near 5 feet holds roughly 30,000 gallons; increasing average depth to 6 feet adds excavation, structure, and water-treatment demand. A diving area, tanning ledge, spa, or irregular shape also requires extra design and construction.
Site conditions can move a quote sharply. Rock excavation or difficult soil may add $5,000-$20,000 or more, while a narrow equipment route can require smaller machines and additional labor. Concrete offers flexible shapes but usually costs more than vinyl. A large fiberglass shell can be limited by transport dimensions and crane access. Confirm the proposed pool’s dimensions, depth profile, and included soil-disposal allowance before comparing totals.
How regional labor and access affect large-pool prices
Large-pool construction often costs 10%-25% more in high-cost metro areas and parts of the Northeast or West Coast than in lower-cost inland markets. Local permitting, insurance, wages, and subcontractor availability contribute to the difference. Rural locations may have lower labor rates but higher charges for travel, delivery, or hauling.
Delivery access matters especially for fiberglass shells and heavy equipment. A crane, street closure, or utility-line coordination can add several thousand dollars. In-ground utilities and retaining walls may require separate work. Use local bids rather than a national average when setting the final budget.
How long excavation and pool installation take
Once permits and materials are ready, excavation may take 2-5 days, while shell construction and equipment installation can take several weeks. Concrete pools often need 8-16 weeks or longer from excavation through interior finish; vinyl and fiberglass projects may move faster when access and inspections are straightforward.
Weather, inspections, crew scheduling, and custom materials can extend the calendar. A compressed schedule or peak-season start may carry higher charges where contractor demand is strong. Get a schedule showing excavation, inspections, finish work, and expected water-fill date.
What add-ons and site work can add to a pool bill
A heater commonly adds $2,000-$6,000, while a salt system may add $1,500-$3,500. Automatic covers often cost $10,000-$20,000, and a spa or water feature may add $5,000-$20,000 or more. Fencing, landscaping, and drainage are frequently priced separately.
Deck area is another major swing. At roughly $10-$30 per square foot, expanding a 600-square-foot deck to 1,000 square feet may add $4,000-$12,000, depending on surface and preparation. Demolition or removal of an old pool can cost $5,000-$20,000. Check whether fencing, landscaping, drainage, and cleanup are included or excluded.
Three large-pool quotes with different project scopes
| Example | Specifications | Estimated total | Cost detail |
|---|---|---|---|
| Value build | 20 by 40 ft vinyl; basic filtration; 600 sq ft deck | $75,000-$95,000 | About $94-$119 per pool sq ft |
| Midrange build | 20 by 40 ft concrete; standard finish; 800 sq ft deck | $105,000-$140,000 | About $131-$175 per pool sq ft |
| Premium build | 20 by 40 ft concrete; upgraded finish, heater, cover, larger deck | $155,000-$210,000 | About $194-$263 per pool sq ft |
These illustrative totals assume ordinary soil and access, with major landscaping and unusual retaining work excluded. Compare what each quote includes, not just the advertised pool price.
Where homeowners can trim a large-pool budget
A simple rectangle, consistent depth, standard finish, and restrained deck size can reduce construction complexity. Choosing a standard equipment package and adding optional features later may help, but retrofits can cost more than including necessary plumbing during construction. Avoid removing safety items or required code work.
Request at least three itemized bids using the same dimensions, depth, decking area, and equipment list. Confirm allowances for rock, hauling, electrical work, permits, and restoration, then ask how changes are priced. Controlling the design and clarifying exclusions are usually more dependable savings than choosing the lowest headline bid.