Fiberglass vs. Gunite Pool Price: Middle Tennessee Homeowner''s Guide (2026)

Comparing fiberglass vs. gunite pool price in Middle Tennessee is not as simple as looking up a number online. The completed cost of either pool type depends on your specific property, the design you choose, the site conditions on your lot, and the features and finishes you select. This guide explains what drives pricing for each pool type — so you can evaluate quotes accurately and make a decision that fits your situation.

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Why Fiberglass and Gunite Pools Have Different Cost Structures

The most important thing to understand about fiberglass vs. gunite pool pricing is that the two pool types have fundamentally different cost structures — not just different price tags.

A fiberglass pool is a factory-manufactured shell. The shell is built off-site by the manufacturer and delivered to your property as a finished unit. The cost of the shell itself is determined by the manufacturer's model, size, and configuration. On-site construction involves excavation, setting and leveling the shell, backfill, plumbing, equipment installation, and decking. Because the shell arrives as a finished product, the on-site construction process generally involves fewer stages than comparable gunite construction.

A gunite pool is constructed entirely on-site. After excavation, a reinforced steel framework is assembled in the shape of the pool, and gunite — a dry-mix concrete applied pneumatically — is sprayed over the steel to form the shell. The interior finish is applied separately. Because the structure is built in place, gunite construction involves more on-site labor, more trades, and more construction stages. It also allows for a higher degree of custom design flexibility — shapes, depths, and configurations that fall outside the range of available fiberglass manufacturer models.

Comparing a fiberglass shell price with a complete gunite proposal — or vice versa — is not an apples-to-apples comparison. The meaningful comparison is completed project cost, which includes excavation, site preparation, decking, equipment, features, and all finishing work for both pool types.

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What Drives Fiberglass Pool Pricing in Middle Tennessee

Shell Selection

The fiberglass shell itself is a significant component of the project cost. Shells vary by manufacturer, model, size, depth, and configuration. Larger shells, deeper shells, and shells with integrated features such as tanning ledges, built-in spas, or beach entries are priced differently than compact or standard models. The shell you select sets the baseline for the project.

Excavation and Site Conditions

Excavation cost is site-specific and can vary significantly depending on what is in the ground. In Middle Tennessee — particularly in Wilson County, Rutherford County, and parts of Davidson and Williamson counties — rock and limestone are common. If rock or limestone is encountered during excavation, specialized equipment may be required, which can affect the excavation process and the overall project cost. This is a variable that cannot be fully known until excavation begins, which is why site conditions are discussed upfront and addressed clearly in project agreements.

Site access also affects cost. The fiberglass shell must be delivered to the property and craned into the excavated space. Properties with limited access, overhead obstacles such as power lines or tree canopy, or narrow passages may require additional equipment or planning.

Site Preparation and Drainage

Proper backfill material, base preparation, and drainage are important to the long-term performance of a fiberglass installation. Middle Tennessee's clay-heavy soil requires attention to drainage around the shell. These are not optional steps — they are part of a properly executed installation.

Decking and Coping

Decking is a major component of the completed project cost for any pool type. The material you choose — concrete, pavers, travertine, or other options — affects both the appearance and the cost of the finished space. The size of the deck area, the complexity of the layout, and any transitions to adjacent outdoor living areas all factor into the decking cost.

Equipment

Pool equipment — pump, filter, heater or heat pump, automation system, lighting, and any additional features — is a meaningful part of the project budget. Variable-speed pumps, smart automation, and extended-season heating add to upfront cost and affect long-term operating costs. The equipment package you select is part of the project cost discussion.

Features and Outdoor Living

Integrated water features, outdoor lighting, landscaping, and outdoor living elements adjacent to the pool are typically planned and priced as part of the overall project. A pool planned alongside the surrounding backyard environment generally produces a more cohesive result than features added incrementally after construction.

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What Drives Gunite Pool Pricing in Middle Tennessee

Design Complexity

Gunite's primary advantage is design flexibility. The pool is built in place, which means the shape, depth, layout, and features can be designed around your specific property and goals. Custom shapes, unusual depths, complex integrated spas, and highly specific configurations are achievable with gunite in ways that are not possible with manufacturer-designed fiberglass shells. Greater design complexity generally means more on-site labor, more construction stages, and higher project cost.

On-Site Construction

Gunite construction involves more on-site work than setting a manufactured fiberglass shell. The steel framework, gunite application, curing, and interior finishing are all completed on-site by multiple trades. This is a more labor-intensive process, and labor costs in Middle Tennessee — particularly for skilled masonry and finishing crews — are a significant component of gunite project cost.

Interior Finish Selection

The interior finish of a gunite pool is selected as part of the project and applied on-site. Options may include plaster, aggregate blends, and tile. The finish you select affects both the appearance of the finished pool and the project cost. High-end finishes such as glass tile or premium aggregate blends add to the project cost.

Excavation and Site Conditions

The same site-condition variables that affect fiberglass projects apply to gunite. Rock, limestone, drainage, access, and slope all affect excavation cost and site preparation requirements. These are evaluated during the site consultation.

Custom Features

Attached spas, tanning ledges, natural rock waterfalls, and other custom features are commonly integrated into gunite designs. Each adds to the project cost. The degree of customization is one of the primary reasons gunite projects vary widely in completed cost.

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Fiberglass vs. Gunite: Qualitative Cost Comparison

The table below summarizes the key differences between fiberglass and gunite across the factors that most affect project cost and long-term ownership. These are general descriptions — the right choice for your project depends on your specific property, design goals, and ownership priorities.

Factor	Fiberglass	Gunite
Pool structure	Factory-manufactured shell	Constructed on-site
Design flexibility	Manufacturer-designed models and configurations	High custom-design flexibility
Site construction	Generally fewer on-site construction stages	More extensive on-site construction
Excavation / site conditions	Site-specific	Site-specific
Surface	Smooth, non-porous gelcoat	Finish selected as part of the concrete pool system
Future surface work	No routine plaster-resurfacing cycle; surface condition can still require repair or refinishing	Finish condition can require resurfacing over time
Custom shapes / depths	Limited to available manufacturer models	Highly customizable
Spas / water features	Available depending on model and project design	Highly customizable and integrated
Completed project price	Depends on property, model, selections, and site conditions	Depends on design, property, selections, and site conditions

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Long-Term Ownership Costs

The completed project cost is only part of the picture. Fiberglass and gunite pools have different surface characteristics and maintenance needs that affect long-term ownership costs.

Surface Maintenance

The most meaningful long-term difference between fiberglass and gunite is surface maintenance. Gunite pools have a plaster or aggregate interior finish that weathers over time and requires periodic resurfacing — a significant cost that should be factored into any long-term comparison. Unlike plaster-finished gunite pools, fiberglass pools do not have the same routine plaster-resurfacing cycle, although the fiberglass surface can still require repair or refinishing depending on its condition.

Water Chemistry

Fiberglass's smooth, non-porous gelcoat surface resists algae growth and tends to require less chemical input to maintain water quality than the more porous surface of a concrete pool. The degree of difference depends on how the pool is used and maintained, but this is a real ownership-cost consideration.

Equipment and Operating Costs

Variable-speed pumps, efficient heating, and smart automation affect ongoing operating costs for both pool types. The equipment package selected at the time of construction has a long-term impact on what the pool costs to run.

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The Middle Tennessee Site Factor

Middle Tennessee presents site conditions that affect pool projects of both types. Rock and limestone are common in Wilson County, parts of Davidson County, and other areas of the region. Clay-heavy soil requires proper drainage planning and backfill for any inground pool installation. Sloped lots, limited access, and overhead obstacles are common in established neighborhoods across the Nashville area.

These conditions are not unique to one pool type — they affect fiberglass and gunite projects alike. A thorough site evaluation before construction begins is the best way to understand what your specific property presents and how it affects the project.

Pool projects must comply with applicable local permitting, inspection, and safety requirements. Marlin Exteriors coordinates applicable project requirements as part of the construction process.

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Frequently Asked Questions

What is the main cost difference between fiberglass and gunite pools in Middle Tennessee? The two pool types have different cost structures, not just different price tags. Fiberglass cost is driven primarily by the shell model selected, site conditions, and the decking and equipment package. Gunite cost is driven primarily by design complexity, on-site labor, interior finish selection, and site conditions. A completed project comparison — including all site work, decking, equipment, and features — is the meaningful comparison, not a shell price vs. a total gunite proposal.

Does hitting rock during excavation affect fiberglass and gunite projects differently? Rock and limestone affect excavation cost for both pool types. If rock or limestone is encountered during excavation, specialized equipment may be required, which can affect the excavation process and the overall project cost. This is a site-specific variable that is discussed upfront and addressed clearly in project agreements. It is not unique to one pool type.

Can I customize a fiberglass pool as much as a gunite pool? No. Fiberglass shells are available in manufacturer-designed models — the shape, size, and depth are determined by the shell you select. Gunite is built on-site and can accommodate virtually any shape, depth, or configuration. For homeowners with specific shape requirements, unusual depth needs, or highly custom design goals, gunite is generally the appropriate choice. For homeowners whose goals fit within the available fiberglass model range, fiberglass offers a generally more streamlined on-site construction process.

How do long-term maintenance costs compare between fiberglass and gunite? Fiberglass and gunite have different surface characteristics that affect long-term maintenance costs. Gunite pools require periodic resurfacing of the interior finish — a significant cost that should be factored into any long-term comparison. Fiberglass pools do not have the same routine plaster-resurfacing cycle, though the fiberglass surface can still require repair or refinishing depending on its condition. Fiberglass's non-porous surface also tends to require less chemical input to maintain water quality. The degree of difference depends on how the pool is used and maintained.

What other costs should I factor into a pool project budget? Beyond the pool structure itself, a complete project budget includes excavation and site preparation, decking and coping, equipment, any integrated features such as spas or water features, outdoor lighting, and applicable permitting costs. The size of the deck area, the materials selected, and the scope of outdoor living integration are all meaningful cost factors for both pool types.

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Getting an Accurate Estimate for Your Middle Tennessee Pool

For budgeting purposes, many professionally installed fiberglass pool projects in Middle Tennessee average around $85,000. This is an average project figure—not a minimum price, starting price, or required budget. Simpler fiberglass installations may cost less, while larger pools, challenging site conditions, premium decking, upgraded equipment, and highly customized outdoor living features can increase the total investment.

Every pool project is different. Marlin Exteriors develops project-specific pricing after evaluating the property, pool design, site conditions, and selected features. There is no substitute for a site visit — the variables that most affect project cost in Middle Tennessee are specific to each lot.

We build both fiberglass and gunite pools and discuss both options during the consultation. Our goal is to help you understand which pool type fits your property and goals, and to provide a project-specific estimate that reflects what your pool will actually cost to build.

Contact us to schedule a site consultation and receive a site-specific estimate. You can also visit our fiberglass pools page, gunite pools page, or swimming pool overview to learn more about each pool type, or browse our project gallery to see completed work across Middle Tennessee. If you are considering financing, our financial partners page covers available options through VistaFi, Lyon Financial, and Regions Bank.