10 Best One Piece Toilets 2026 in the United States

The Casta Diva Elongated One-Piece Toilet is a compact, modern choice designed to blend style with functionality. Its one-piece, skirted design makes cleaning easier and helps prevent leaks, which is a real plus in bathroom maintenance. The elongated bowl shape offers more seating comfort compared to round bowls, and the 17-inch ADA comfort chair height suits most adults, making it easier to sit and stand up. It features a dual-flush system with options for 1.1 gallons per flush (liquids) and 1.6 gallons per flush (solids), meeting EPA WaterSense standards for water efficiency, so it helps save water without sacrificing flush power.

The flushing system uses a powerful siphon jet with a fully-glazed trapway, which usually means quiet and effective flushing with less risk of clogs. The toilet's dimensions are on the compact side, which is good for smaller bathrooms. Its seat is made from durable polypropylene with a soft-close function, preventing loud slamming and adding to user comfort. Installation is straightforward with a standard 12-inch rough-in and included hardware, even for those with little plumbing experience.

Weighing 125 pounds means it might be a bit heavy to handle during installation without help. Also, while the design is modern and smooth, some may prefer a different seat shape than the U-shaped one provided. The one-year limited warranty and lifetime technical support add peace of mind. This toilet is a solid pick for anyone looking for an efficient, comfortable, and stylish one-piece toilet, especially suited for small to medium-sized bathrooms.

The TOTO WASHLET+ Nexus One-Piece Toilet is an elongated-shaped toilet, which many find more comfortable compared to round bowl designs. The integrated WASHLET+ bidet seat offers a variety of luxurious features including warm water washing, an auto open/close lid, a heated seat, and a warm air dryer. These features can greatly enhance the user experience with customizable settings for temperature and pressure.

Furthermore, the EWATER+ system mists the wand and toilet bowl, helping to keep the unit clean without harsh chemicals. The toilet uses a 1.28 gallons per flush (GPF) system, making it water-efficient and eco-friendly. At 27 inches in height, it is a comfortable height for most users, and its sleek design hides water supply and power cords for a cleaner look.

The toilet and bidet are made from a combination of ceramic and plastic materials, finished in a cotton white color, which can easily fit into most bathroom decors. One potential downside is its relatively high weight at 116 pounds, which might make installation more challenging. Additionally, the bidet seat is made of plastic, which may not feel as premium as other materials. The contemporary design and array of features make it a great choice for those looking to upgrade their bathroom experience with advanced convenience and cleanliness features.

The KOHLER K-6428-0 Memoirs Stately Comfort Height Toilet is designed for comfort and efficiency, making it a solid choice for those looking for a reliable one-piece toilet. Its compact elongated bowl provides added sitting comfort while maintaining a smaller footprint, which is great for tighter spaces. The comfort height feature elevates the seat to a chair-like height, facilitating easier use for most adults, particularly the elderly or those with mobility issues.

One of the standout features is its AquaPiston flush technology, which allows water to enter the bowl from all sides. This design not only enhances the flushing power but also reduces the chances of clogs, making it effective in terms of performance. The 1.28 gallons per flush (GPF) water consumption meets WaterSense certification, indicating it is water-efficient and can help save on utility bills.

There are a few points to consider. At 114.49 pounds, this toilet is quite heavy, which may complicate installation if you're not experienced. Although it includes a quiet-close seat, it does not come with a supply line, so you may need to purchase one separately, adding to the overall cost. While the left-hand trip lever may suit most users, some may prefer a right-hand option based on their bathroom layout.