Deep Bathtubs & Soaking Tub: The Best Way to Relax in Bathroom

Have you ever sunk into a warm bath, only to find your knees or shoulders left out in the cold? The dream of a truly relaxing, full-body soak often clashes with the reality of a standard tub. Enter the deep bathtub, the must-have feature for modern bathrooms in 2025. These tubs are designed for one thing: complete immersion. They offer a spa-level experience that can transform your daily routine into a wellness ritual.

Whether you're looking to create a personal sanctuary in a spacious primary suite or trying to fit luxury into a small bathroom, this buying guide has you covered. We'll explore everything you need to know about choosing, installing, and enjoying a deep soaking bathtub. Get ready to discover how you can bring the ultimate in comfort and relaxation into your home.

Deep Bathtubs at a Glance: Quick Comparison Table (2025)

To help you understand the options, here is a quick look at the common types of deep bathtubs you will find on the market. Instead of focusing on specific companies, this table highlights categories of tubs to help you identify what might suit your needs.

Tub Category	Soaking Depth	Material(s)	Price Range	Key Features	Typical Warranty	Average User Rating
Budget-Friendly Built-In	18–20 inches	Acrylic, Fiberglass	$400 – $900	Alcove design, shower combo ready, lightweight	1–5 Years	★★★☆☆
Mid-Range Freestanding	20–22 inches	High-Gloss Acrylic	$1,000 – $2,500	Modern oval/rectangular shapes, good heat retention	10 Years – Limited Lifetime	★★★★☆
Japanese Soaking Tub	24–36 inches	Acrylic, Stone Resin	$2,000 – $5,000	Upright seating, small footprint, maximum immersion	10–25 Years	★★★★★
Luxury Stone Resin	20–24 inches	Solid Surface/Stone Resin	$3,000 – $7,000	Excellent heat retention, matte finish, statement piece	10 Years – Lifetime	★★★★★
Classic Cast Iron	18–22 inches	Enameled Cast Iron	$1,500 – $4,000	Timeless look (clawfoot tub), extremely durable	25 Years – Lifetime	★★★★☆
Walk-In Deep Soaker	35–40 in. (tub height)	Acrylic, Gelcoat	$3,000 – $8,000+	Inward-swinging door, built-in seat, safety bars	10 Years – Lifetime	★★★★☆

As the chart illustrates, deep soaking bathtubs vary widely in depth, materials, price, and design features—each category catering to different lifestyles, budgets, and installation needs. Whether you're drawn to the sculptural elegance of a freestanding stone resin tub or considering the practicality of a built-in alcove model, your ideal choice ultimately depends on one crucial factor: how deep do you want your soak to be?

But what exactly makes a bathtub deep? Is it just a few extra inches—or does it completely change the bathing experience? In the next section, we’ll break down the defining characteristics of deep bathtubs, how depth is measured, and what those extra inches mean in terms of comfort, immersion, and body support. This will help you understand what to expect when you step into one, and guide you toward a model that truly delivers on your relaxation goals.

What Makes a Bathtub "Deep"? Key Features & Dimensions

So, what is the difference between a bathtub with average bathtub size dimensions and a deep one? It comes down to water depth.

A standard tub depth typically ranges from 14 to 16 inches. This shallow depth is often just enough to cover your legs, which contrasts sharply with deeper tubs designed for full-body immersion. A deep soaking bathtub, on the other hand, is designed for full-body immersion. These tubs usually have a water depth ranging from 20 to 36 inches. This extra space allows you to fully submerge your body, covering your shoulders and providing a much more therapeutic bathing experience.

These tubs come in various shapes and sizes that often align with the bathtub dimensions standard, making it easier to find a deep tub that fits your unique bathroom space without requiring major remodeling.

Common Types of Deep Soaking Tubs

Tub Type	Typical Soaking Depth	Common Lengths	Best For
Japanese Soaking Tub	24–36 inches	36–48 inches	Ultimate immersion in a small bathroom; upright seating.
Freestanding Deep Tub	20–24 inches	55–72 inches	Creating a luxurious focal point in a larger bathroom.
Corner Deep Tub	18–24 inches	48–60 inches diagonally	Maximizing space in unusually shaped or small spaces.
Custom/Extra-Deep Tub	24–36+ inches	Varies	A personalized luxurious soaking experience tailored to your body and room.
Walk-In Deep Tub	36–40 inches (height)	48–60 inches	Safety and accessibility, with a deep seat for a secure soak.
Alcove/Drop-In Tub	18–22 inches	60 inches (standard)	A simple upgrade for a standard tub space, often paired with a shower.

As the table shows, there’s a deep soaking tub for nearly every layout and lifestyle—from compact Japanese tubs perfect for apartment living to dramatic freestanding models that turn your bathroom into a sanctuary. If you're dealing with an oddly shaped layout, corner tubs shine in making the most of tight spaces. For those seeking ultimate comfort and accessibility, Walk-in deep tubs offer enhanced safety features like low-entry doors and built-in seats, making them ideal for seniors or people with mobility challenges. According to OSHA, incorporating non-slip surfaces and safety bars in bathing areas can significantly reduce fall risks. These tubs combine therapeutic depth with easy access, providing peace of mind without sacrificing comfort.

Pro Tip: If you're remodeling an existing space, alcove or drop-in deep tubs often fit into standard 60" x 30" openings—offering a seamless upgrade without altering the footprint.

But space isn't the only consideration. Once you’ve found the style that fits, it’s time to think about comfort, care, and long-term performance—which all come down to materials. The next section will walk you through the pros, cons, and upkeep tips for different bathtub materials so you can make.

Why Choose a Deep Bathtub? Wellness, Comfort & Social Trends

Why is there such a growing interest in the extra deep soaking tub? The reasons go beyond simple aesthetics. Choosing a deep tub is an investment in your well-being.

Here are the core benefits:

Spa-Like Relaxation: The primary reason people choose a deep soak tub is for the unmatched relaxation. Being able to fully submerge your body in warm water creates a feeling of weightlessness that calms the mind and melts away the stress of the day. It’s the closest you can get to a spa in the comfort of your home.
Muscle and Stress Relief: The science of hydrotherapy is well-known. Deep soaking promotes better blood circulation, which can help soothe sore muscles, ease joint pain, and reduce inflammation. The gentle pressure of the water provides a comforting, cocoon-like sensation.
Superior Buoyancy: In a deeper tub, your body experiences more buoyancy. This lift helps take the pressure off your spine and joints, allowing for total muscle relaxation in a way a standard bathtub simply cannot match. You aren’t just sitting in water; you are floating in it.
Accessibility for All Ages: While some might think getting into a deep tub is difficult, many models offer enhanced safety. For example, walk-in deep bathtubs are specifically designed for older adults or those with mobility challenges. They combine the safety of a low-entry door with the therapeutic benefits of a deep soak.

Exploring Popular Types of Deep Soaking Bathtubs in 2025

While we won't discuss specific companies, the market for deep bathtubs is filled with innovation. When shopping, you'll encounter different categories of tubs, each with unique selling points.

The High-Tech Innovators

These tubs are perfect for those who love smart home technology. You will find tubs with features like:

Heated Surfaces: Say goodbye to the cold shock of a tub's backrest. Some deep tubs come with integrated heating systems that warm the interior surface, keeping you comfortable for longer. This feature is especially appreciated during winter months or for those who enjoy extended soaks, as it helps maintain consistent warmth without constantly adding hot water.
Digital Controls: Manage water temperature, jet intensity, and lighting with a simple touchpad. These user-friendly interfaces allow you to customize your bath with precision—whether you want a quick, energizing soak or a long, meditative immersion. Many systems also include memory settings to save your preferred bath configuration.
Chromatherapy (LED Lighting): Integrated LED lights change color to match your mood, aiming to create a more calming or energizing bathing experience. Soft blues and greens can promote relaxation and stress relief, while warmer tones like red or orange may help invigorate the senses—turning your tub into a fully immersive wellness environment.

The Eco-Conscious Choice

For environmentally minded homeowners, some manufacturers are focusing on sustainability without compromising on luxury.

Sustainable Materials: Look for tubs made from recycled materials or natural composites that are less resource-intensive. These environmentally conscious options reduce the carbon footprint of your bathroom renovation while still offering high performance and aesthetics. Materials like recycled acrylic or eco-resin blends are not only durable but also contribute to a more sustainable home.
Improved Heat Retention: Materials like stone resin and modern cast iron are excellent at keeping water warm. Their dense composition traps heat effectively, allowing you to enjoy longer soaks without constantly topping off with hot water. Better heat retention means significant savings over time—not just in energy bills, but also in water usage. A well-insulated soaking tub made from these materials can maintain a cozy bath temperature for 60 minutes or more, even in cooler climates.

The Small-Space Champions

The trend of deep tubs is not just for large homes. The rise of compact, efficient models has made them accessible to everyone.

Like Japanese Soaking Tubs: These tubs are designed to be deeper than they are long, prioritizing vertical space over horizontal. Their compact, barrel-like form is perfect for tight bathrooms, urban apartments, and tiny homes where space is at a premium. Despite their small footprint—often as little as 40 inches across—these tubs deliver an immersive bathing experience that covers your entire body. You sit upright with your legs tucked in, similar to a hot spring or spa, making it a uniquely relaxing and culturally inspired soak.
Corner Tubs: A corner tub is another smart solution for space-challenged layouts. By fitting snugly into a 90-degree corner, it frees up valuable central floor area and visually opens up the bathroom. Many corner tubs still offer a generous soaking depth, with some models including built-in seating or angled backrests for added comfort. They’re especially useful in bathrooms with unusual layouts or when trying to preserve floor space for vanities or storage.

Deep Bathtubs: Buying & Selection Guide

Ready to pick your perfect soaking tub? It's an exciting process, but there are a few practical factors to consider before you buy.

Assess Your Bathroom and Home Systems

Bathroom Size: The most important step is to measure your space accurately. Remember to account for clearance around the tub for cleaning and movement. For a freestanding tub, you'll want at least 4–6 inches of space on all sides. Also, consider how the tub will visually balance within the room—too large a tub can overwhelm a small space, while too small a tub may feel underwhelming in a large bathroom.
Water Heater Capacity: A deep bathtub holds a significant amount of water—some up to 80 gallons or more, compared to 30–50 for a standard tub. Ensure your water heater can handle the demand. A standard 40-gallon tank may require an upgrade to a larger tank or a tankless water heater to fill the tub with sufficiently hot water. Without adequate hot water capacity, you risk lukewarm baths and a less satisfying soaking experience.
Plumbing Requirements: Check if your existing plumbing will work. Freestanding models often require floor-mounted faucets, which might mean moving supply lines. Always consult with a plumber before finalizing your purchase. In some cases, drain relocation or subfloor access may be needed, which can impact both cost and installation time.

Choose the Right Material

The material of your tub affects its look, feel, durability, and cost. Here is a breakdown of popular options:

Acrylic: This is the most popular material for a reason. Acrylic tubs are lightweight, affordable, and easy to clean. They have good heat retention and come in a vast array of shapes and sizes, including the acrylic freestanding tub.
Fiberglass: The most budget-friendly option, fiberglass is very lightweight. However, it is more prone to scratching and discoloration over time than acrylic.
Stone Resin (Solid Surface): A composite of natural minerals and resins, stone resin tubs offer a smooth, matte finish that feels warm to the touch. They have exceptional durability and the best heat retention.
Cast Iron: The classic choice. A cast iron tub is incredibly durable and will last a lifetime. Coated in thick enamel, it holds heat very well once warmed up. Its major downside is its extreme weight, which means your bathroom floor can support it is a critical consideration.

Interactive Quiz: Which Depth is Right for You?

Ask yourself these questions to find the deep bathtub that suits your needs:

What is my primary goal? Is it quick daily bathing (18-20 inch deep tub) or long, meditative soaks (24+ inch Japanese soaking tub)?
How much space do I have? A standard 60-inch alcove (drop-in tubs) or a flexible space for a freestanding soaking tub?
What is my budget for the tub AND installation? Remember that installing a deep bathtub, especially one that requires plumbing or floor changes, adds to the total cost.
Who will be using it? If accessibility is a concern, a walk-in model or a tub with a lower profile (around 20-22 inches) might be a better fit.

Installation & Maintenance: Real-World Considerations

A tub purchase doesn't end when it's delivered. Proper installation and care are key to enjoying your investment for years to come.

Pre-Installation Checklist

Before your new tub arrives, work with a professional to confirm these points:

Structural Support: This is non-negotiable. Deep bathtubs are heavy, and when filled with water, they are extremely heavy. A licensed contractor must verify that your floor joists can handle the load. Floor reinforcement is often necessary, especially for cast iron or large stone models on an upper floor.
Plumbing Compatibility: Confirm that your water supply lines and drain location will work with the new tub. A tub may require significant plumbing adjustments, which can affect your budget and timeline.
Clear Entry Path: Make sure the tub can be delivered and carried into the bathroom. Measure doorways, hallways, and stairwells to ensure a clear path.

Tub Care & Maintenance Chart

Choosing the right bathtub material isn't just about appearance or cost—it also affects how much time and effort you'll spend on cleaning and maintenance.

Material	Daily Cleaning	Deep Cleaning	Stain/Scratch Removal
Acrylic	Rinse after use; wipe with a soft cloth.	Use non-abrasive, non-ammonia liquid cleaner.	Light scratches can be buffed out with fine-grit sandpaper and polishing compound.
Stone Resin	Rinse and wipe dry.	Mild, non-abrasive cleaners (e.g., dish soap and water).	Most stains and scratches can be sanded away with the included sanding pad.
Cast Iron	Rinse and dry thoroughly to prevent rust.	Use gentle, non-abrasive cleaners. Avoid steel wool.	Chips in the enamel require a professional repair kit.
Fiberglass	Rinse and wipe with a soft cloth.	Use non-abrasive gel or liquid cleaners.	Prone to scratching; use specialized fiberglass polish for minor marks.

No matter the material, avoid abrasive cleaners and harsh chemicals. Use soft cloths or sponges, and rinse the tub after each use to prevent soap scum and mineral buildup. For homes with hard water, wiping surfaces dry or occasionally using a white vinegar rinse can prevent long-term staining and calcium deposits.

When choosing your ideal deep soaking tub, don’t just consider the price tag or design—think about how much upkeep you're willing to commit to. A beautiful tub should stay beautiful for years to come, and the right care routine will make all the difference.

Real Owner Reviews & Testimonials

Nothing beats hearing directly from people who’ve already transformed their bathrooms with a deep soaking tub. Here's what they’re saying:

"After a long day of standing at work, my old tub just didn’t cut it. My back ached, and I could never get comfortable. After upgrading my bathroom with a Japanese soaking tub, everything changed. It fits perfectly in my small bathroom, but the depth is incredible. The first time I sank in up to my chin, I felt the tension just released." — Maya L., NYC

Hearing from people who have already made the switch to a deep bathtub provides valuable insight. We've gathered common themes from online forums and discussions.

On Satisfaction: The overwhelming sentiment is positive. Most owners report that their deep tub has significantly improved their quality of life, citing better sleep and reduced stress. The most common phrase is, "I'll never go back to a standard tub."
On Installation Challenges: A recurring tip from owners is to hire a professional. Many who tried to DIY the installation ran into unexpected issues with leveling the tub, connecting the drain, or realizing too late that floor reinforcement was needed. The consensus is that the extra cost for a pro is worth it.
On Unexpected Benefits: Some users with children mention that the extra depth helps contain splashing, keeping the bathroom floor drier. Others note that their freestanding tub makes the entire bathroom feel more open and airy compared to their old, boxed-in alcove tub.

Your Journey to Ultimate Relaxation Starts Here

Choosing a deep bathtub is more than just a home improvement project; it's a commitment to your own comfort and well-being. From the muscle-relaxing benefits of a deep soak to the stunning visual impact of a freestanding tub, the right model can completely transform your bathroom and your daily routine.

By considering your space, understanding the material options, and planning for installation, you can confidently select a high-quality soaking tub that will bring you joy for years to come. The trend for 2025 is clear: the bathroom is becoming a personal wellness retreat, and the deep soaking tub is its centerpiece.

Deep Bathtub FAQ

Here are answers to some of the most common questions about deep soaking tubs.

1. What depth is a deep bath?

The depth of a deep bathtub is measured from the bottom of the tub to the overflow drain. Generally speaking, a deep bathtub is considered deep if it is 18 inches or more deep. But a bathtub that can really let people soak in it is often deeper, usually between 20 and 36 inches. This depth is enough to immerse the whole body in the water, even the shoulders and upper body can be wrapped in warm water, and the feeling of relaxation is incomparable to a standard bathtub. Most of our common standard bathtubs are between 14 and 16 inches deep. In comparison, the comfort brought by a deep bathtub is obviously superior, and it can also bring good healing effects. After a busy day, soaking in it, all the fatigue seems to be taken away by the water. When choosing a deep bathtub, you have to pay more attention to your height. If a tall person chooses a too shallow one, it will definitely be uncomfortable to soak in it; and the size of the bathroom space must also be considered, don't buy it back and put it in a crowded place. Of course, your own bathing habits are more important. Some people like to soak shallowly, while others prefer to immerse their whole body in water. Combining these factors, you can find the ideal bathtub that is both practical and completely relaxing.

2. What do you call a deep bathtub?

Deep bathtubs are most often called "soaking tubs," which are names that directly point out their advantages - they are perfect for soaking your whole body in and staying in comfort for a long time. If you divide them by style or characteristics, you can also see terms such as "extra deep soaking tub" and "Japanese soaking tub." Extra deep soaking tubs are deeper than ordinary deep bathtubs, and the name alone tells you how deep they are; Japanese soaking tubs are small and exquisite, and people can soak in them while sitting. The depth is cleverly designed, and it can be placed even in a small bathroom space, which is particularly practical. Different places or different manufacturers may use different terms, but these names all aim to make you soak deeper and more comfortable than a standard bathtub. No matter what they are called, the core is to bring a more enjoyable bathing experience, making every bath a rare moment of relaxation.

3. What's a good depth for a soaking tub?

The most comfortable depth for soaking in a tub is generally between 20 and 24 inches. This depth allows most adults to soak their entire bodies in it without feeling crowded and just the right amount of relaxation. It strikes a perfect balance between depth and ease of use, and is the right range for those who want to take a relaxing bath every day. Every time you soak in it, the warm water wraps your whole body, and the comfort is indescribable. But if you are taller or like to soak while standing, a Japanese bathtub may be more to your liking. This type of bathtub is usually more than 25 inches deep, which is enough to meet special needs, and even tall people can stretch out freely. Ultimately, the ideal depth depends on personal circumstances. Different body shapes have different suitable depths; different bathing postures have different requirements for depth; and the degree of immersion you want will also affect the final choice. Choosing the right depth can make every bath a pleasure.

4. Can you put a deep tub in a small bathroom?

It’s possible to fit a deep tub in a small bathroom, and sometimes it’s a good idea. The key is to take advantage of the vertical depth, rather than the horizontal space. Japanese soaking tubs are particularly popular in compact layouts. They’re designed to be deep and upright, allowing you to soak in a tub as small as 40x40 inches. They’re usually low to the ground, and some even come with a built-in bench, which saves space and makes soaking in a tub so comfortable. As you immerse yourself in the water, the warmth envelops you and your tiredness melts away. A deep tub in a small bathroom doesn’t have to conflict with ideals. With the right model, you can have a comfortable soak in even the smallest of spaces. Designs that make smart use of vertical space make every inch count. Even if your bathroom is small, you can still find a moment of peace and relaxation after a busy day in the tub. Don’t let space limit your enjoyment, a deep tub can fit perfectly into a small bathroom. The right model will surprise you, without sacrificing depth or comfort, making a bath a daily treat.

5. What are the dimensions of a standard bathtub?

Standard bathtubs, especially the common alcove bathtub, are mostly fixed in size: 60 inches long, 30 to 32 inches wide, and 14 to 16 inches deep. These sizes are designed for everyday use in the average home, where you can stretch your knees and turn around easily while sitting in the bath, but you can't bury your entire body in the water. The water surface reaches up to the waist, shoulders and back are always exposed, and in winter, you have to lift the water up from time to time, so you can't talk about complete relaxation at all.

6. What is the deepest depth for a soaking tub?

Most commercial bathtubs have a standard depth of 18 to 36 inches. If someone is looking for a deep soak, a custom bathtub can be deeper than that. The 36-inch depth does give a strong sense of immersion, but in ordinary homes, there are few bathtubs deeper than this, mainly because it is a lot more troublesome to operate. For example, the deeper the water is, the greater the weight, and the bathroom floor must have a stronger structural support, otherwise there may be problems. And from a safety perspective, it is inconvenient to get in and out of a bathtub that is too deep, which also limits its depth. Bathtubs used in residential areas that are more than 36 inches deep are basically custom-made. However, the cost of customization is not low, and there may be various engineering requirements, which cannot be done casually. So, how deep a bathtub should be is ultimately a matter of personal preference and the actual conditions of the bathroom space, and both must be taken into account.

References

https://www.hud.gov/program_offices/fair_housing_equal_opp/disabilities/fhefhasp