In this guide

Prefab vs Custom Indoor Pool

Depending on the way they are made, swimming pools cost $10,000 to $90,000. When you build them inside, you first need to choose the installation method or whether it will be prefabricated or custom made. The main difference between prefab and custom options is the way they are made. Prefab options are made and assembled in a facility and brought as a complete shell to be placed on-site. In contrast, custom options are fully built on-site. Below is a table with their costs and what building each of them involves:

Prefab Swimming Pool

Prefab swimming options come at the price of $10,000 to $95,000. They are usually made of fiberglass or precast concrete panels. While they can be made in basic shapes like rectangular, square, circle, kidney, and L-shapes, the range of shapes and designs is limited compared to swimming areas made on-site. Prefab swimming areas also need to be made of high-quality materials to last longer, although typically, custom constructed options last longer.

Prefab models are often cheaper than custom models because they are manufactured in a facility and brought to the installation area fully assembled. This lowers the time needed to complete the project significantly, and with it, the price. However, keep in mind that prefab models have to be shipped and craned into place, which means they cannot be wider than 16 feet and longer than 40 feet. Sometimes, prefab options can be made with precast concrete wall panels instead of the whole shell. The wall panels are made in a facility but then assembled on-site rather than brought fully assembled as pool shells.

Custom Swimming Pool

The price to build a custom swimming area ranges between $100,0000 and $350,000. All materials are brought to the installation area and built in the area where the structure will be. While they allow homeowners to choose various designs, colors, and shapes, custom options can be messy to do. The machinery used to dig the hole and clean the area may damage the surrounding landscape, gardens, or yard. You may need to hire a landscape service to bring it back to its old shine. While building the structure itself, dust and debris can get stuck to the home facade and exterior and enter the home, requiring additional cleaning services afterward.

When you build a concrete custom swimming area, keep in mind that the concrete takes several days to cure. During the curing time, the concrete will have to be sprayed with water to prevent it from drying out suddenly and developing cracks. Depending on the contractor, this responsibility may be yours, or it will be done by the company. The surface would also need to be protected to prevent animals and insects from stepping on it or getting stuck in the wet mixture.

Indoor Swimming Pool Prices by Size

The average price for an interior option ranges from $69.50 to $295 per sq.ft. for prefab options and $100.50 to $312.50 for custom models, depending on various factors. The price of building an inside is primarily based on the square footage, or size, of the swimming area being installed. There are several different sizes of options available. While the 12’ x 24’ size is most common, those who want a larger option could install one as big as 30’ x 50’. There are many other sizes in between. Since most people choose to install an in-ground swimming area inside, the costs in the table below reflect pricing for in-ground installation.

Indoor Pool Costs by Material

If you plan to install an interior option, expect to pay between $20,000 and $85,000 for a prefabricated option and $29,000 to $90,000 for custom options. The material that you choose for your impacts how much it costs to install. Typically, fiberglass is used for prefab options, while vinyl is used for custom-made models only. Concrete, on the other hand, can be used for both custom and prefab models. However, prefab models are not so common due to the design and size limitations. Here is how much you can expect to pay for each material installed, no heater, enclosure, dehumidifier, or other extra elements included.

Vinyl Indoor Pool

Most people spend between $35,000 and $65,000 for a vinyl option. Because of how they are made, vinyl models can only be made on-site but not prefabricated. Prefabricated fiberglass options still require a vinyl liner, which is why many think that the option is prefabricated in vinyl when this is not the case. Vinyl options are available in several shapes and sizes: rectangular, round, full-L, and lagoon. However, these options require a lot more maintenance over time compared to the other materials available. They need liner replacements every ten years, along with other maintenance and care.

Concrete Indoor Pool

To install a custom concrete or gunite option, you can expect to spend about $29,000 to $90,000. Prefab concrete options are smaller and are priced $20,000 to $50,000 depending on the size and customization features. There is often confusion if concrete and gunite options are the same. They are. The difference is in the way they are made. Gunite is a dry mixture mixed with water at the nozzle while it's sprayed. In contrast, concrete (shotcrete) is a wet mixture sprayed onto the surface. Although the priced for precast concrete optoni is lower, the reason for this is the smaller size and lower labor costs.

Concrete models are typically poured on site and offer more shapes and creative designs than fiberglass or vinyl. Precast concrete models have to be shipped and craned into the installation area, so their size is usually less than 8 feet by 15 feet. The shape can vary, giving homeowners many design options. The structure may also be coated with various finishes such as plaster, paint, aggregate, or specialty coating. Precast concrete models, on the other hand, can only be made in simple shapes like squares, circles, and rectangles, with rectangles being the most common shape due to the easier construction.

Fiberglass Indoor Pool

A fiberglass model is the most common type of prefab option that typically costs between $45,000 and $85,000 to install. Fiberglass options are the preferred option for modern swimming areas located inside because the shells can be set in place and provide plenty of years of use. This is primarily because they use fewer chemicals and are easier to maintain. The shells are available in many styles and designs and can be installed quickly, so they are more affordable than other types. They have a higher initial cost, but since they are the lowest-maintenance choice, they provide years of enjoyable use. However, because they need to be shipped, fiberglass options are limited in size and depth. They cannot be longer than 40 feet and wider than 16 feet, and their depth usually does not surpass 6 feet.

Indoor Pool Prices by Construction Type

Based on how they are constructed, swimming areas can be above-ground or in-ground, with prices ranging between $10,000 and $200,000. The big range of costs is because above-ground options are simpler and quicker to install than in-ground options. Above ground options do not require any excavation, while you would have to excavate a hole to construct an in-ground one. In-ground models can also be customized, while in-ground models come with limited customization options. These are just some factors that affect the cost of the project. Here is how much you can expect to spend for each type based on the way it is constructed:

Indoor Above-Ground Pool

Typically, for a full installation with additional construction, you can expect to spend $10,000 to $36,000 on an above-ground model. Above ground models are usually prefab, but they can also be custom-made with a range of materials. However, they are limited in depth, with 48 inches, 52 inches, and 54 inches being the only options available. People save a lot of money on installation by installing an above-ground model instead of going in-ground. Considering that it can save you as much as 20% or more, it might be worth a look. This is possible when you already have an existing space and few installation and maintenance issues to address.

Indoor In-Ground Pool Cost

The average price of an interior in-ground option is about $40,000 to $200,000. In-ground models can be either prefab or custom-built, depending on the material used. However, the most common type is custom because of the wide range of designs and customization features. Depending on whether you just need the swimming area or you need to build the enclosure too, the price of installing an in-ground option inside varies significantly. The increase in price may be due to labor to break through the foundation. Leveling and adding drainage can also drive up the price of an in-ground model.​

Cost to Build Indoor Pool by Type

The type of inside swimming area you choose may affect the price ranging from as little as $10,000 for a plunge model to $204,500 for a heated saltwater model. There are several options available for installation. Below, we’ll look into installing options based on their intended use, such as lap, heated, saltwater, and more. Some factors affecting the price are the size and the chosen swimming structure. If an enclosure is needed for the, the cost will be higher than those that do not require an enclosure. These variables affect the cost, and each type has its own pros and cons to consider. In the table below, you’ll see a list of average costs for interior in-ground options by type, with all labor, materials, and finishing work included.

Indoor Plunge Pools

If you want a plunge pool in your home, expect to pay between $10,000 and $25,000 for prefab models and between $15,000 and $30,000 for custom ones. Plunge models are newer, but they are one of the most affordable options on the market. They are designed for basic swimming and do not require much space. They are ideal for those who just want a place to cool off and may not need a whole installation that takes up a lot of space. If you want a swimming area inside your home, but are on a budget, consider a plunge design.

Indoor Heated Pool Cost

A heater adds about $4,500 to the average price, making it around $14,500 to $204,500 to install an interior heated option. A heated option is not always required inside the home but may be desired by those who want a more comfortable year-round swimming experience. When you choose a heated pool, the only additional expense during installation that you will have to consider is the heater and the electrical work involved to install the unit. After installation, costs to run it may incur additional charges if outside temperatures dip below 45 degrees. This is because it uses more energy if outside temperatures are colder.

Indoor Basic Pool

The price to install a basic option inside your home ranges between $20,000 and $90,000, depending on the size. This price would include only the basic design of a rectangular option without the additional customization features such as salt, decking, heat pumps, or custom designs or shapes. Basic optoins can be made in any material, vinyl, fiberglass, or concrete, which affects the overall price of the project.

Indoor Endless Pool Cost

Endless pools typically cost between $50,000 and $60,000, depending on their size and the materials used for construction. The endless lap option is one of the most popular choices for interior use. This option is unique because it requires a smaller footprint but still provides all the benefits of swimming laps like you would in a regulation-size model. The ongoing current within the also makes endless options a great choice for inside your home. You feel like you are swimming through a strong river current, making for a high-quality swim in a small area. Because of the designs of these types, endless options can only be custom made.

Indoor Lap Pool Cost

If you want a lap pool, it costs an average of $50,000 to $100,000 for in-ground models, but you can get an above-ground lap model for a much lower price. For those who just want to swim laps, a lap option could be a cost-effective choice. They can be installed in-ground or above the ground, depending on the space available and your budget. Most models are custom made but can also be prefab. They are ideal for exercise and maximizing space, but they’re not as much fun for general swimming. They typically range from 40 to 75 feet in size.

Indoor Saltwater Pool

The average price to install an interior saltwater option is about $156,000 to $200,000. The price of interior saltwater option is high because they require an enclosure, which significantly increases the costs. An saltwater option is a great choice for those who would prefer less maintenance and fewer chemicals. When you love to swim, but you don’t want the work of a traditional pool or the risk of the chemicals, salt water is the way to go. Also, if you don’t like the smell of chlorine or are allergic to it, this choice is a good option and still is effective at keeping the water sanitized. However, they also require a saltwater generator and other equipment traditional ones don’t need.

Indoor Pool Cost by Design Type

The interior swimming area design is another element that affects the price of your installation, with costs ranging from $20,000 to $75,000 for prefab options and $29,000 to $100,000 for custom options. There are many styles on the market today, and each has several different designs. While rectangular models are the most affordable, kidney-shaped models are still inexpensive. See the table below to get an idea of the different designs and how much each costs to install in-ground.

Indoor Kidney-Shaped Pools

If you want to get a common design, opt for the kidney-shaped model that costs between $20,000 and $35,000 for prefab kidney options and $30,000 to $65,000 for custom ones. These options resemble the shape of a kidney bean, thus the name. Kidney-shaped options have been around for decades and are one of the most affordable options for those who don’t want a rectangular design. They offer a reduced risk of sharp corners. They also come in various sizes and configurations for something more visually appealing than a simple shape.

Indoor Rectangular Pools

If you want to install a rectangular model in your home, the price ranges from $20,000 to $60,000 for prefab designs and $60,000 to $70,000 for custom rectangular options. Rectangular models are fairly standard in interior installation. These models come in different sizes, all the way up to 30’ x 50’ or more. They can be installed in just about any space. Rectangular options are also cheaper to install because of their shape. They are among the least expensive options you can buy for interior use.

Indoor Classic Pools

Classic designs, such as Greek or Roman, are usually simple rectangular designs that add detailed curves and accents for a stylish look and are priced between $25,000 and $45,000 if you opt for a prefab model. Custom options are slightly more expensive, moving in the $29,000 to $90,000 range. These will typically cost more for the decking and installation because of the detailed features, but they also offer that classic look that people love. Roman options have half-circles at the ends and rounded corners. Grecian designs include curves and angles that are similar but more flowing and less structured. For those who want to add a touch of elegance to simple installation, this style could fit the bill.

Indoor Lagoon Pools

Lagoon options give you the chance to turn your interior space into a tropical oasis and can set you bac you between $35,000 and $75,000 when you build prefab model and $70,000 to $100,000 for custom models. You may choose this design if you prefer something that resembles a natural body of water. For added style, many people also add rocks, grottos, waterfalls, and other designs to their lagoon-style swimming areas. For those less concerned with budget and more so with style, this is the way to go. You can even create completely custom designs that give you a space like none you’ve seen before. Bear in mind that any additional features add to the price of the basic structure.

Indoor Swimming Pool Cost to Build

Installing an interior structure depends on the type of pool and its size, but an indoor structure ranges from $40,000 to over $200,000, with $22,800 to $60,700 of the price range going towards labor and the $17,200 to $139,300 going towards materials. Interior installation is not a small feat. Typically, it starts with a survey of the site and a discussion of the type of swimming area that will be installed. You can choose from several types, including lagoon, rectangular, classic, and more. Once a design and style are chosen, the installer will help you understand the installation process and what it will entail.

Typically, in-ground models require more installation labor and costs than above-ground models. You will also have to consider any excavation and construction work on the structure where you will be installing. After excavation, the contractor installs the plumbing, fixtures, material, walls, coping, and backfill. The final touch will be adding the finishing and additional enhancements if you choose. An in-ground interior model can take anywhere from two to eight weeks to install, depending on the type of material.

Other price factors in building inside include excavation and site prep which make up about 5 to 10% of the total project expenses for installation. If you don’t already have a structure in place, the costs will change significantly. Other costs that may be incurred include building permits, costs for filter and pump installation, a heat pump, and hourly use of contractors. These contractors may include installers, electricians, plumbers, and concrete workers. You may even incur costs for materials and finishing.

Basement Swimming Pool Cost

Typically, a basement swimming pool costs the same as installing one in other rooms, between $40,000 to $200,000, because there is no need to build an enclosure. However, additional excavation or construction modifications may incur additional expenses. Installing a swimming area in the basement is a great way to use existing space and give your swimming area a solid foundation. It creates a private oasis in your home. The location means that there is less to worry about in terms of flooding and other insurance or liability concerns. If you have an unfinished basement, the chances are good that there’s a concrete floor that can be used to create the decking, which means you will also incur lower installation costs.

Interior options are ideal because they don’t collect dirt and bugs like outdoor ones. They can even be locked and covered with automatic covers for added safety. Something you will need to consider with this installation is whether the basement ceiling needs to be raised, but this usually isn’t an issue. In-ground options are generally the preferred option for basements, but there are above-ground models available.

Basement swimming areas have their own considerations. For example, you’ll want to stick with that automatic cover to prevent evaporation and reduce humidity issues. You’ll also need to pay attention to lighting to create an inviting space. Most importantly, leave plenty of room in your budget for the heater, filtration system, pump, and a full dehumidification system to ensure no excess moisture buildup in your basement or the rest of your home.

Indoor Pool Dehumidification System Cost

Dehumidification systems can be as cheap as $2,400 for smaller units, or you could spend up to $20,000 or more to have a pool-specific system installed. One of the biggest elements of interior installation is having an appropriate dehumidification system in place. These systems draw the moisture from the water out of the air and ensure that moisture doesn’t build up in your walls or elsewhere throughout the structure. These systems come in different styles and price ranges. You need to find the one that is right for your swimming area. Below, you will see a table that lists the average price of each system for a pool that measures 12’ x 24’ (288 sq.ft.) and requires an enclosed space of 22’ x 36’ (792 sq.ft.). For the whole-home system, we estimated a 2,500 sq.ft. home.

Whole-Home System

If you want a whole-home ventilation system installed, expect to pay between $2,400 and $8,000. A few different types of dehumidification systems are available for you to invest in for your interior swimming area. A whole-home system certainly isn’t required if you are only trying to keep the swimming area dry. However, it can be installed in your existing HVAC unit to create uniform dehumidification throughout the house. It is ultimately more likely that you will choose a pool-specific system. These units are specifically designed for interior swimming areas and have more sophisticated features and better humidity controls than a standard HVAC system or freestanding dehumidifier.

Ventilation-Based Systems

A ventilation-based system costs between $4,000 and $10,000 installed, depending on the size of the unit that you need. Ventilation-based dehumidification systems use the outside air to create a temperature balance and eliminate excess humidity during colder months. The flaw of this system is that in the summer months, it has no means of cooling the room. This affects its ability to remove humidity adequately. You can add a cooling coil to this system. However, since it has limited cooling and dehumidification abilities, it may be best to choose the refrigeration-style system we’ll discuss next.

Mechanical Refrigeration Systems

Mechanical refrigeration systems average between $4,000 and $20,000 installed, based on the size and type of unit you choose. These are the most popular choice for small and mid-size interior installations. They are also the more popular choice in most climates. These dehumidification systems work by drawing in the warm, humid air and passing it over coils that cool the air. The moisture is condensed to capture it, releasing cool, dry air into the swimming area.

Indoor Pool Heat Pump Cost

You will find swimming pool heaters ranging in price from about $1,250 to more than $9,000. Installation costs vary depending on the type of heater and installation required. The average homeowner will likely pay $4,500 for the installation and unit. If you choose to heat your water, you will have to factor in the added price of the heat pump. There are several styles on the market today, and each has its own pros and cons to consider.

Electric Pool Heater Installation Cost

A electric resistance heater and its installation price of $1,250 to $5,800. You can install an electric resistance heater in your home to assist with heating the water. Electric resistance heaters work by pumping the water across heated coils and returning it to the water. They draw in cool water, warm it up, and send it back out. This cycle keeps an even balance with the temperature of the water.

Gas Pool Heater Installation Cost

A gas heater has an average price of $1,350 to $5,500, including installation. A gas heater is the most popular choice for most homeowners. These can run off natural gas or propane, although natural gas is typically the more affordable option. Homeowners prefer this type of heater because they heat water the fastest. These systems are slightly more expensive initially, but they offer a lower price of use over time.

Pool Heat Pump Installation Cost

A heat pump and its installation price an average of $2,250 to $7,000. Electric heat pumps are the most common choice for in-ground water heating. These are different from resistance heaters in their operation, and they use less energy. They are among the most efficient options and last twice as long as most heaters. These pumps can get water within a desirable heat range of 78 to 86 degrees Fahrenheit.

Solar Pool Heater Installation Cost

The solar heater and panels have an average price of $3,000 to $9,000, installation included. Those who want to save in the long run can choose solar heaters. These have a higher initial price but save more money on heating costs in the long run and protect from the risk of huge electricity bills. Solar heaters, however, can only be used in areas with direct sunlight. The size determines how many panels you need. Typically, for a 12’ x 24’ model with a surface area of 288 square feet, you’ll need nine or ten solar panels.

Indoor Pool Maintenance Cost

On average, you’ll spend about $25 to $50 per hour on swimming pool maintenance and upkeep. Interior maintenance is much less labor-intensive and less expensive than outdoor maintenance in most cases. If you have a swimming area that has been properly installed with vapor barriers, dehumidifiers, and all other necessary elements, you won’t spend that much on routine maintenance. Occasionally you will need chemical treatments and regular cleaning. However, since it’s inside, you won’t have to worry much about the elements affecting your swimming area.

Of course, this could be significantly higher or lower, depending on the type you opt for. For example, concrete options require resurfacing, and vinyl options need a new liner every ten years. Fiberglass is the most expensive initially but offers the lowest maintenance costs over time. Maintenance consists of regular cleanings and chemical treatments and includes occasional parts repairs or replacements. Many people take on basic care as a DIY project, in which case you would only pay for the chemicals and materials needed.

Indoor vs Outdoor Pool

It generally costs less to build a swimming area outdoors than it does indoors, with outdoor costs ranging between $10,000 and $100,000 and interior costs between $40,000 and $200,000. Building inside the home is usually more expensive because of the additional features and equipment needed to operate properly. There are a number of variables involved with an interior model, including whether you have or need a structure around your swimming area, whether you’re installing it above-ground or in ground, how big the it will be, and the need for a dehumidification system. When you add in the cost of decking, heating the water, a dehumidification system, and building or properly adapting the structure that will contain the pool, the average price will be closer to the highest price of the range. The table below compares the price range of interior and exterior installation.

Indoor vs Enclosed Pool Cost

The price to install an indoor option ranges from $40,000 to $200,000, while an enclosed option ranges from $45,000 to $120,000. Many people assume that indoor and enclosed swimming areas are the same. This, however, is not the case at all. When you opt for an interior one, it is typically in a home or other existing building. An enclosed option, however, can be made simply by building a structure over an existing swimming area. The biggest difference between interior and enclosed options is the freestanding nature of an enclosed pool–it will not typically be connected to the house. The following table describes the price of installation in an existing structure and installing an in-ground enclosed option, including the price of creating the structure.

Pros and Cons of Indoor Swimming Pools

When considering whether an interior pool is the right investment, you will certainly want to weigh the pros and cons. Although they may be different for you, depending on your interest in this project, here are some of the biggest things to consider. The first benefit of building one inside which leads most people to consider it, is the fact that they can be used year-round. It won’t matter what the weather is like or where you live, because you’ll be able to swim whenever you want. These models also require less maintenance because they are out of the elements. This means they won’t collect as much debris and dirt. They will remain in better condition for longer since they aren’t exposed to the harsh conditions outdoors.

Speaking of exposure, an interior option is also going to have the benefit of less sun exposure. This protects you, your family and friends, and your swimming area from the harmful UV rays of the sun. Finally, interior options provide more privacy and security than outdoor options. You can even install automatic covers, put locks on the doors, and include additional safety features for added protection.

Of course, choosing to install an interior option comes with a huge initial investment. However, you should keep in mind that upkeep and maintenance with an interior option typically priced at less over time. One of the biggest concerns with installing indoors is moisture. Humidity and moisture control are critical to the enjoyment of your space and the protection of your home. Make sure that you carefully research and install a proper dehumidification system to help protect your home from moisture damage, mildew, and even potential mold risks.

Enhancement and Improvement Costs

Pool Waterfall Cost

If you choose to install a water feature or waterfall, you will typically budget an additional $100 to $3,500 for the total project. Installing a waterfall can be a great way to add a unique touch to your swimming area. Not only is it great for aesthetic reasons, but a waterfall acts as a sound barrier. Waterfalls can be purchased in prefabricated designs or custom-designed to your exact specifications. Custom water features cost more, but this feature typically makes up about 10 to 15% of the total cost.

Automatic Pool Cover Cost

An automatic cover runs between $5,000 and $15,000 in addition to your existing project costs. A cover keeps your swimming area protected and makes your life easier. This is because it will save you on maintenance costs by keeping dirt and debris out. It can also protect small children and pets from accidental drownings. Covers operate by using interlocking gears that open and close the cover. This mechanism is controlled by typing in a code and pressing a button to cover or uncover it.

Pool Lighting Cost

The average price of a good lighting installation is between $450 to $1,200. LED lights are a great choice because they are long-lasting and won’t have to be changed as often. Some people choose to install lighting around their swimming area, either for function or style. Having them inside the water enhances the ambiance and minimizes the use of overhead interior lights. The options for lighting are as varied as the amount of designs available.

Pool Steps

Installing steps could set you back anywhere from $1,400 to $1,900, depending on the type of pool and steps. A set of steps is a vital feature for getting in and out of the water. Most fiberglass shells include steps to get into an in-ground model. They will also often be built into concrete and vinyl options. Above-ground steps are also available for above-ground models.

Pool Deck Cost

The average price of a deck is $6,750 to $8,000, with some people paying as much as $26,000 or more for a larger or custom deck creation. You need a deck around your pool where people can walk. The material of the deck will typically have the biggest effect on cost. Even in an existing structure, the construction creates a need for new decking. You can install concrete decking or use composite materials.

Vapor Barrier Installation Cost

This typically costs between $1,200 and $4,000, depending on the size of the structure. A vapor barrier costs about $0.50 to $0.75 per sq.ft. to install. When installing an interior swimming area, you need to install a vapor barrier on the structure walls to prevent moisture buildup. The accumulation of water vapor can damage drywall, cause rust to develop on metals, and increase the chances of mold growth. This problem can worsen if you have heat pumps installed within your swimming area because heat causes more evaporation.