8 Best Composting Toilet for Tiny House 2022

Best Composting Toilet for Tiny House

There are numerous alternatives for the best composting toilet for tiny houses on the market, but not all tiny house toilets are equal. Knowing your requirements, expectations, and desire to maintain an alternative toilet will assist you in selecting a toilet that suits your lifestyle and enhances the pleasure of your new house.

A composting toilet might be the answer if your mobile home or compact house lacks the infrastructure to sustain a regular flushing toilet. This unique toilet breaks down human waste with aerobic bacteria and stores it in a tidy, easy-to-remove container. Composting toilet separate liquids from solids, then breaks down solid waste with organic components and bacteria to produce human waste (a.k.a. humanure). If your local rules allow, you may dispose of this waste in a trash bag, but you can also use it in your garden—yes, even on edibles!—if you choose.

A high-quality composting toilet will minimize odors and leaks, which is especially important in a compact living area but has many other aspects to consider. This article will support you in getting that selection by describing why the following composting toilets are among the finest on the market.

Reviews of Best Composting Toilet for Tiny House

Now that you have a larger conclusion of the best composting toilets, here are some of the most excellent options. You might be able to locate the best composting toilet for your requirements here.

1. Villa 9215 AC/DC Composting Toilet

Separett Villa 9215 AC/DC
  • Composting,Waterless,Urine diverting, off-grid, toilet

Check out the Separett Villa 9215 composting toilet for an all-around high-quality composting toilet. This waterless self-contained composting toilet uses an electric fan to exchange gases and may be used in a house or boat, or RV with a 12V system. It’s lightweight, weighing only 34 pounds, and it’s simple to set up.

The toilet, adapters for both 110V and 12V electricity, and all parts for direct venting and connecting the liquid drain into a greywater system are all included in the package. The tank is large enough for an average-sized household to utilize for three weeks.

It’s the most sophisticated, trouble-free composting toilet available, whether you’re living on or off the grid. It is urine-diverting and waterless. The Villa 9215 may be powered by either AC (average home or on-grid) or DC (batteries or solar). It comes with a single-speed fan with AC and DC adaptors for venting up to 20 feet. All parts necessary for direct vent and drain applications are included. As an option, a child seat is offered.

A five-year warranty against manufacturing flaws is included. The fan comes with a three-year contract, and The total weight of the shipment is 34 pounds. Dimensions of the box: 18.5 x 23 x 27.75 inches The toilet bowl’s design collects urine in a drain connected to a greywater system or holding tank. Only solid trash and paper are confined in a biodegradable liner bag within the concrete waste holding area. The vent fan circulates air over the substantial waste holding area, assisting in drying the waste and venting any odors.

The compostable liner bag is taken from the solid waste holding compartment after a period of usage – around three weeks for the average household – and put in your composter, certified solid waste disposal facility, or burned. This approach eliminates the problems associated with attempting to compost all of the waste in the toilet.

  • Seat with pressure sensitivity
  • Mixing trash bins automatically
  • There is no odor.
  • It can use in an off-grid environment
  • Low use of electricity
  • None


2. Sun-Mar Excel Self-Contained Composting Toilet

Sun-Mar Excel Self-Contained Composting Toilet, Model# Excel
  • NSF CERTIFIED - First self-contained, composting toilet to be certified by the National Sanitation Foundation.
  • ZERO ODOR - A 2-inch vent in the back runs out of the house, which keeps your home clean and odorless.
  • USES NO WATER - This is a completely water-free system, saving the planet while saving you money.

When seeking an environmentally-friendly toilet, the Sun-Mar Excel Electric Waterless Composting Toilet is worth considering. An electric fan is used to dry liquids in this composting toilet, but it also draws air into the tank and pushes waste gases out of the vent to eliminate smells. Three individuals or a family of five can fit in the self-contained tank.

Despite its vast capacity, the Sun-Mar weighs just 60 pounds, making installation simple. However, it may necessitate the purchase of an extra electric kit to connect it to 12V electricity in a boat or camper. The Sun-Mar Excel Self-Contained Composting Toilet is the gold standard in the industry. The NSF recommends this system as the only one for continuous home use, and A single Sun-Mar Excel unit can readily handle the constant use of three individuals or five families.

Even with constant use, a 2-inch rear vent exhausts the air, keeping your home clean and odor-free. Sun-self-contained Mar’s composting toilet consumes no water, saving both the environment and your pocketbook.

  • fit in the self-contained tank
  • Durable
  • None

Related: Best American Standard Toilets

3. Nature’s Head – a Self-Contained Composting Toilet

Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle...
  • No one - and I mean no one - will beat my customer service and individual support
  • Easy to install by any reasonably handy person.
  • Absolutely No Odor. No Maintenance. 5 Year Warranty.
  • Huge Capacity. 2 people using full time will empty every 4-6 weeks. Easy empty in 5 minutes.
  • A vast improvement over older composting toilet designs. This one works!

This Nature’s Head model is tough to beat when it comes to a sturdy, easy-to-use composting toilet. It diverts urine into a removable tank and has a side-mounted “spider” handle for churning the solid waste. The waste tank is large enough to accommodate two individuals full-time, but it will need to be emptied every four to six weeks.

The electric fan in this waterless toilet draws fresh air in and pushes odors out, helping keep odors at bay. The fan runs on 12V, but with a kit purchased straight from Nature’s Head, it can be converted to 110V. This toilet, or Head (the maritime name for toilet), was created by two long-time sailors who wanted to make something that was more user-friendly than anything else on the market.

The device was intended to endure the severe sea environment; it can be used everywhere you need a toilet, especially when plumbing or power is difficult or non-existent. Nature’s Head Composting Toilet is the most up-to-date design, greatest value, and most dependable alternative for portable, self-contained, urine-separating dry toilets on the sea, land, or road.

Most significantly, unlike all other holding tank systems, this toilet does not emit unpleasant odors. The built-in low-volume air circulation fan has the extra benefit of recycling the air in your bathroom, which helps to make your entire surroundings smell nicer. Its robust design and materials (all stainless hardware) have been highly durable no matter what your environment is like because it was initially built for nautical usage.

  • Design that saves space
  • It’s simple to empty
  • Warranty period: 5 years
  • Customer service is outstanding.
  • High-quality construction
  • None


4. SUN-MAR GTG TOILET | Portable Compost Toilet

SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV
  • COMPACT AND PORTABLE - The efficient GTG is the ideal portable toilet for camping or RV toilet use!
  • INSTALLS IN MINUTES - This portable potty for adults (children too) is almost TOO easy to install!
  • SOLID/LIQUID SEPARATION - This smart toilet separate liquid and solid waste to separate chambers!
  • TINY - The most compact porta potty camp toilet (that doesn't sacrifice practicality) we could find!
  • EASY DISPOSAL - The GTG functions similarly to a cassette toilet, making waste management a breeze!

When looking for a compact, portable toilet that composts, the Sun-Mar GTG Composting Toilet is worth considering. The self-contained GTG generates the same compost as other, much larger toilets, unlike other travel versions that still need to be emptied into a sewer.

The GTG is a 12V-powered waterless toilet with a fan. It separates liquids from solids and divides them into two containers that are easier to remove. It weighs just under 30 pounds and measures 24 inches deep by 15.75 inches wide and 19.8 inches tall so that it will fit in most compact houses, RVs, and campers’ restrooms without difficulty.

You’ll be wondering where else you can place a composting toilet now that it’s so simple to use and install! This toilet compartmentalizes liquid and solid waste into separate compartments. You’ll wonder why you didn’t get rid of your RV toilet chemicals sooner with this porta-potty toilet. Compared to incinerator toilets and incinerating toilets, this type is much less inconvenient and has a minor environmental effect (s).

The GTG is also a waterless toilet, which is maybe the most attractive feature. Your portable bathroom will be complete with the GTG. The tiny size, function (similar to a cassette toilet), and convenience of use make these toilets popular.

  • 12V-powered waterless toilet
  • simple to use and install
  • None


5. Nature’s Head Dry Composting Toilet

Nature's Head Dry Composting Toilet with Standard Crank Handle
  • Hand crank agitator in base for fast composting
  • User friendly
  • Easy installation
  • Features a molded design
  • Includes 5' vent hose, bottle cap, 12v power plug

Nature’s Head Dry Composting Toilet with Crank Handle is a reliable and easy composting toilet solution for a cabin, boat, or RV. This self-contained toilet features a durable, molded plastic construction that is suitable for boats and RVs, as well as rust-resistant stainless steel fittings. It has a detachable liquid jug that separates liquids from solids. It features a 12-volt fan and a 5-foot vent pipe for exhausting gases.

Instead of a spider handle, Nature’s Head has a crank handle. While the handle is swappable between sides and gives enough leverage for churning solids, it does require a little extra space from the wall. Nature’s Head Composting Toilet is the most inventive design, the best value, and the most dependable personal sanitation solution of any product on the market.

The toilet was built to resist the most extreme circumstances, with stainless steel hardware, a sturdy structure, and user-friendliness. The toilet is self-contained, urine-diverting, and operates without water, making it ideal for various applications. Nature’s Head is a beautiful match for your home, cabin, tiny house, RV, workshop, boat, and survival application since it is lightweight, odorless, and compact.

  • Containers for liquids and solids should be kept separate.
  • A toilet that does not use water
  • Polyethylene structure is durable.
  • Disassembly is simple for composting, and the product comes with a 5-year guarantee.
  • None

Read also: Best Toilets Under $200

6. Sun-Mar Compact Self-Contained Composting Toilet

The Sun-Mar Compact is a smaller version of Excel and is better suited to small families with up to two persons. It’s not as big as the Excel model, but it’s a lot more appealing. It features a low-profile, stylish design that will fit into most compact areas. Sun-unique Mar’s Bio-drum is used to shrink it. It has a smaller diameter in the front and a larger diameter in the back.

The drum is stirred using a single agitator handle. It extends from the unit’s front. The fact that it disappears into the unit’s body is a beautiful space-saving feature that Nature’s Head versions don’t have. This model’s front-operated handle makes it excellent for small areas, but it’s not perfect for short-length restrooms. This composting toilet is one of the tiniest on the market.

Sun-Mar toilets are easy to install anywhere and do not require any plumbing connections. They outperform regular toilets in terms of preserving public health and the environment. It is critical to understand how various treatment systems compare when selecting which treatment option is best for you. Bacteria are used in most waste treatment systems to break down organic waste. Composting is the term for this procedure.

Regardless of whether the treatment system supports aerobic or anaerobic bacteria, selecting a system that composts waste completely to safeguard public health and safety is critical. Companies frequently use the word “composting” to describe their waste management methods, even if they do not “completely compost” trash. It is especially true that toilets collect waste or provide only partial treatment, such as urine separating toilets. These systems leave homeowners with the onerous responsibility of disposing of raw solid and liquid waste regularly. Composting garbage entirely is critical for public health and safety as well as the environment.

  • Small size
  • Front-operated recessed handle with no odor
  • Bio-drum (patent pending)
  • Non-polluting to the nth degree
  • None


7. Reliance Products Luggable Loo Portable 5 Gallon Toilet

Reliance Products Luggable Loo Portable 5 Gallon Toilet Gray, 13.5 inch x 13.0...
  • Compatible with reliance's standard Double doodle bag
  • Weight: 3.00lbs
  • Economically priced portable toilet
  • 5-gallon (20-liter) capacity
  • Simple bucket style design; traditional snap-on lid

The Luggable Loo is about as simple as a toilet for your compact house can get. It’s just a 5-gallon bucket with a plastic toilet seat affixed to the top. The genius of it is that these buckets are sturdy enough to hold the majority of people. They’re also made to be completely airtight. It is ideal for something that will use to store garbage.

Reliance’s Double Doodie bags are compatible with the Luggable Loo. The majority of people begin by placing a standard plastic garbage bag in the bucket before inserting the Double Doodie bags. It protects the bucket from spillage and makes trash disposal very simple. The device includes a snap-on toilet seat as well as an airtight lid.

The toilet features a strong metal handle that allows you to move it anywhere. It makes transporting garbage to a compost bin or a dumpster for disposal much more accessible. We’ll be honest: this isn’t the most attractive or user-friendly toilet for a tiny house. It is, however, both practical and portable, making it ideal for people looking for a valuable but straightforward toilet for a tenth of the price of other higher-end composting toilets.

  • Dirt is inexpensive.
  • Compact and lightweight
  • It may be utilized in any situation.
  • Completely self-sufficient
  • Airtight cons are sealed.
  • It doesn’t distinguish between liquid and solid waste
  • It necessitates frequent emptying, and each user requires the use of a plastic bag.
  • If not drained, it quickly produces smells.

Read also: Best Kohler Toilets

8. Porta Potti 92306 White Thetford Corp

Porta Potti White Thetford Corp
  • [VERSATILITY]: Award-winning, top-of-the-line portable toilet, suited for RVs, boats, trucks, vans, healthcare, medical, camping and even off-the-grid lifestyle, with a 4 gallons fresh water tank...
  • [DESIGN]: Sleek, modern, and homelike look, Porta Potti Curve comes with a comfortable seat height, increased bowl size, and battery-powered flush
  • [FUNCTIONALITY]: Easy to use and clean, Curve has an ergonomic carrying handle, an integrated toilet paper holder, and a tank level indicator
  • [SANITARY]: Odorless and leak proof, the portable toilet has a sealed valve to prevent odors from escaping and a rotating pour-out spout for emptying the waste water tank without backsplashes
  • [OPTIONAL]: The hold down kit helps secure the portable toilet to the floor, holding it in place while you're on the road and Water fill adaptor

The toilet bowl is more significant, the seat is more comfortable, and the batteries power the flush. The Curve splits, making access to the storage tanks simple. Empty and clean the Curve’s tanks with ease thanks to a redesigned water tank carrying handle and rotating pour-out spout.

The inbuilt holder keeps the toilet paper attached to the Curve traditionally. When not in use, close the container to keep the toilet paper clean and hidden. With the holding tank level indicator for fresh water and waste tanks, you can keep an eye on your Curve.

This toilet is particular to wow with a name like that! Unlike the different composting toilets in the store, this one is a work of art in design. In other words, if you had one in your tiny house kitchen, visitors could think it was a high-end coffee maker. This composting toilet is not only attractive, but it is also highly efficient, with features such as a giant bowl and a toilet paper holder. There’s no requirement to be concerned about the cost of energy because it has a battery-powered flush.

  • Easy to clean
  • Highly efficient
  • None


Composting Toilet Buying Guide

Check to see if a composting toilet will function in your area before buying one. Self-contained and split/central systems are the two sorts, and while they both break down waste, they operate differently and have distinct needs.

A self-contained system:

A self-contained system includes a tiny toilet with a removable tank and a liquid drain for waste removal. Some self-contained systems are portable, making them ideal for camping vacations or boat journeys. They may also be set up in areas where plumbing isn’t available, such as a workshop or garage.

As the name implies, the whole composting process takes place within the toilet. When the tank is filled, remove it and empty the manure. Freshwater tanks or supply lines are occasionally included in these systems to flush waste into the chamber below.

Central System or Split System:

Composting toilets that are connected to a central or split system are comparable to regular toilets. They link to a network of pipes that transport trash to a central bio-drum, hopper, or tank, where it is composted. The garbage is churned in the hopper, which allows it to decompose while simultaneously releasing odorless fumes. When the tank reaches capacity, empty it as if it were a self-contained toilet.

Because split systems require a hopper, which is generally put beneath the toilet, they are significantly more costly than self-contained composters. The hoppers are helpful since they enhance the amount of compost that can store. These composting toilets are an intriguing option for permanent off-grid or environmentally aware houses, but their design makes them unsuitable for mobility.

Available Space:

Composting toilets take up a little more room on the floor than regular toilets, and they don’t have a separate holding tank to deal with. Look for a compact model with a smaller waste tank if you’re building a tiny house or boat.

If room for a split system is available, the greater holding capacity may be worth the expenditure. Adding a hopper to areas like garages and cottages is occasionally possible. Installing the tank outside is a possibility in warmer climes.

Composting vs. Portable:

Although a portable toilet and a composting toilet may appear identical, there are several key distinctions. Microorganisms break down human waste in composting toilets. They distinguish between liquids and solids, allowing bacteria to feed on the organic chemicals found in both. Humanure can be used to strengthen a lawn or garden after it has been composted. The composting process produces a byproduct that fertilizes the soil and provides nutrients to plants.

That is not the case with a portable toilet. Everything flows into one waste tank with portable toilets, and liquids and particles are not separated. Even after adding enzymes and deodorizer to the tank to break down particles and mask odors, the final product must still be disposed of through a sewage or septic system. While portable toilets are convenient for camping and boating, they may not be ideal for permanent housing such as mobile homes and compact houses.

The Capacity of Tank:

When looking for the best composting toilet, consider how many people will be using it. It will help you estimate how much of a tank you’ll need. Manufacturers frequently categorize this based on the size of the family and the intended usage.

A split system with a large tank, for example, might manage the waste of three adults or a family of five, but a self-contained composting toilet with a five-gallon tank would suffice for one adult. The theory is that by appropriately designing the tank, waste will have enough time to decompose into manure before it fills up.

Use of a Utility:

The aerobic bacteria that break down the waste require a lot of oxygen, abundant in the air. A fan that pulls air into the tank and across the waste is powered by electricity in specific composting toilets. It also vents the carbon dioxide produced by the bacteria into the atmosphere. Many functions with a 110V system in the home, while others work with 110V AC and 12V DC from a vehicle or RV battery.

A water line may be required for a composting toilet. While it may seem paradoxical, water-using composting toilets use considerably less water each flush than a typical household toilet. There are also waterless and non-electric versions available, so consider your utility arrangement and household budget when selecting a toilet.

Odor Elimination:

The gases must be produced by the microorganisms in a composting toilet evacuated. Otherwise, smells may develop, and the bacteria’s function may deteriorate due to a lack of oxygen. The blower that draws air into the tank on some versions also drives gases out of the vent, removing odors. After each use, add organic materials, such as sawdust, on top of the waste to cover the scent while allowing the bacteria to break down the solids.

We’ve compiled a list of the best composting toilets for tiny homes below. Each of these toilets is for its capacity to work daily and its ability to be on the move without spilling if you decide to take your small house on the road.


The bottom line is that these toilets aren’t cheap! Despite their rudimentary appearance, they attract high fees. That’s where we’re at with the entire “going green” issue right now. It appears to be subject to a tax, which is unjust. Nature’s Head model, on the other hand, is currently the cheapest model of actual quality available.

It also has a teeny-tiny footprint. The spider handle model takes up only 18″ (W) x 17.75″ (L) of floor space (allowing a few more inches to rotate the handle comfortably). If you’re building a tiny house or RV, this model is worth looking at. Finally, we suggest this toilet since it is long-lasting. It’s made to last, with a 5-year warranty included.

However, we have listed the best composting toilet for a tiny house. If you want to know more then you should read this article and find for yourself.


What’s the tiniest composting toilet you’ve ever seen?

The Sun-Mar Compact is a smaller version of Excel and is better suited to small families with up to two persons. It’s not as big as the Excel model, but it’s a lot more appealing.

In a compact house, how does a composting toilet work?

Liquid and solid waste are generally separated in toilets. Substantial trash will be collected in one chamber and mixed with peat moss to aid in the decomposition of the garbage. Otherwise, you’ll be able to compost the solid waste.

Is it possible to install a composting toilet in a house?

Composting toilet rules do not often apply to households that also have a flush toilet. If the following requirements are satisfied, a composting toilet does not generally breach any regulations (even when it is not explicitly authorized) in existing homes: Your composting area and toilet are both on your property.

Does a composting toilet need to be emptied?

Yes, you must drain it as well, but it is less dirty and odorous. The composting toilet differs from a water-based system in that urine and solid waste is collected separately in the composting toilet. As a result, the outcomes aren’t as obnoxious. You won’t even need to utilize your black tank.

Is it possible to pee in a composting toilet?

It is possible to redirect urine away from the toilet, although it is not required. If there is pee in the mix, more sawdust is added to soak up the extra liquid. Composting toilets are frequently utilized in places where wood shavings, leaf duff, or other appropriate cover is readily available.

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