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What to Ask a Pool Contractor Before Signing a Contract

A swimming pool is one of the largest and most complex home improvements you can undertake, involving excavation, structural engineering, plumbing, electrical, and finish work. Pool projects commonly go over budget and over schedule, and the pool construction industry has more than its share of contractors who take deposits and disappear. No other home improvement project requires this level of scrutiny before you commit.

8 QuestionsPrintable ChecklistAvg Cost: $20,000 - $80,000 per pool

Questions to Ask

1Are you licensed specifically as a pool contractor, and how many pools have you completed in the last two years?

Why It Matters

Many states require a specific pool contractor license separate from a general contractor license. Volume indicates whether this is their primary business or a side project.

Red Flag

They hold only a general contractor license with no pool-specific license, or they've completed fewer than 5 pools in the past two years.

Pro Tip

Ask for a list of recent completions with addresses. Driving by completed pools shows the quality of decking, coping, and tile work.

2What is included in the quoted price, and what are typical change orders I should budget for?

Why It Matters

Pool contracts are notorious for excluding items that every pool needs: fencing, decking, electrical service upgrade, landscaping, and equipment. These 'extras' can add 30-50% to the quoted price.

Red Flag

An unusually low bid that doesn't include decking, fencing, electrical, or landscaping. This is the most common pool construction bait-and-switch.

Pro Tip

Get a line-item bid that includes: excavation, shell (gunite/fiberglass), plumbing, electrical, equipment (pump, filter, heater), tile and coping, interior finish, decking, fencing, and landscaping restoration.

3What type of pool construction are you building, and why is it right for my site?

Why It Matters

Gunite/shotcrete, fiberglass, and vinyl liner pools each have different costs, lifespans, and maintenance requirements. The best choice depends on your soil conditions, budget, and preferences.

Red Flag

They only build one type and recommend it regardless of your site conditions.

Pro Tip

Gunite offers the most design flexibility but costs more. Fiberglass installs faster with less maintenance but has fixed shapes. Vinyl liner costs less but requires liner replacement every 7-12 years.

4Given my soil conditions, are you recommending gunite, fiberglass, or vinyl -- and why is that the right choice for my property?

Why It Matters

Soil type directly affects pool construction. Expansive clay soil shifts and can crack a rigid gunite shell. High water tables create hydrostatic pressure that can pop a fiberglass shell out of the ground. Sandy soil drains well but may require additional stabilization during excavation.

Red Flag

They recommend a construction type without asking about or testing your soil conditions, or they only build one type regardless of site factors.

Pro Tip

Ask whether a soil test or geotechnical report has been done for your property. In clay-heavy soil, a gunite pool with proper steel reinforcement and a hydrostatic relief valve is often the safest choice. In high water table areas, fiberglass needs a dewatering plan during installation.

5Where will the equipment pad be placed, and how will you manage noise, access for maintenance, and drainage?

Why It Matters

Pool pumps, heaters, and chlorinators generate noise and require regular service access. The equipment pad location also affects plumbing run length (which impacts pump efficiency) and needs proper drainage to handle filter backwash and equipment leaks.

Red Flag

They haven't planned the equipment pad location, or they plan to put it directly under a bedroom window or in a location that's difficult to access for repairs.

Pro Tip

The equipment pad should be as close to the pool as practical to minimize plumbing friction loss, placed on a concrete pad with proper drainage, screened from living areas for noise, and accessible from at least two sides for service. Ask about noise levels for the specific pump model.

6What is your winterization plan, and does the contract include closing the pool for the first season?

Why It Matters

Improper winterization causes cracked plumbing, damaged pumps, and surface finish damage from freeze-thaw cycles. In freezing climates, pool closing is a critical service that must be done correctly.

Red Flag

In a cold climate, they don't discuss winterization at all, or they say it's the homeowner's responsibility from day one with no guidance provided.

Pro Tip

Ask specifically about: blowing out plumbing lines with compressed air, adding antifreeze to lines, lowering water level, installing a winter cover or safety cover, and removing and storing sensitive equipment. First-year closing should be included so you can learn the process.

7What is your project timeline, and what causes common delays?

Why It Matters

Pool construction typically takes 8-16 weeks. Delays from weather, permits, inspections, and material availability are common. Understanding realistic timelines prevents frustration.

Red Flag

They promise completion in an unrealistically short timeframe (under 6 weeks for gunite) or can't give you any timeline.

Pro Tip

Ask about their current backlog. If they have 20 pools in progress with a small crew, your timeline will extend. Get the estimated completion date in writing with a clause addressing delays.

8What is your warranty on the pool shell, and what does it cover?

Why It Matters

Pool shell warranties (structural and finish) vary from 1 year to lifetime depending on the contractor and finish type. The structural warranty covers cracks and leaks; the surface warranty covers delamination and discoloration.

Red Flag

No written warranty, or the warranty excludes structural cracking.

Pro Tip

A quality gunite pool should have at least a 10-year structural warranty and a 5-year surface finish warranty. Fiberglass pools typically carry longer manufacturer warranties (25+ years structural).

Bonus Tips for Hiring a Pool Contractor

  • Ask the contractor to walk you through the first 30 days of pool ownership, including water chemistry startup, equipment break-in, and surface curing requirements. New plaster finishes require specific brushing and chemical balancing during the first month or they stain permanently.
  • Verify that the quoted electrical work includes a dedicated sub-panel for pool equipment, proper GFCI protection, and bonding of all metal components within 5 feet of the water. Electrical code for pools is strict, and retrofitting after construction is expensive.
  • If your property has an HOA, confirm setback requirements, fence specifications, and any design approval process before signing a pool contract. Some HOAs require a specific fence type, height, or pool placement that can change the project scope significantly.
  • Ask whether the contractor installs a hydrostatic relief valve in the pool floor. This valve prevents groundwater pressure from lifting the pool shell if the pool is ever drained, which is especially critical in areas with high water tables.

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