What is the Best Tiny House Composting Toilet?

Composting Toilets

Composting toilets have been around for a long time and range from a simple bucket in a box to an electric powered agitating composter with built in urine diverter. The best tiny house composting toilet for you may not be the best one for someone else. Some composting toilets use agitators and some simply store the waste in compostable bags or bins to compost outside. A good resource on compostable toilets is The Humanure Handbook which you can read online for free here. Another great resource, written by the same author, is The Compost Toilet Handbook. It is an illustrated instructional manual explaining how to make, use, and manage compost toilets.

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Things to Consider when Buying a Compostable Toilet

While you can build your own compostable toilet, it is much easier to simply buy one.

Consider the following factors when looking for a compostable toilet:

Do you have regular, reliable power?
Do you have grey water drainage available?
How much room do you have?
How will you vent your composting toilet? You do want some sort of venting system, at a minimum you should be able to open a window. Even when covered with sawdust or peat moss a composting toilet off gasses creating smell.
And the big question – How much money do you want to spend?

Depending on your answers to the above questions lets look at some of the best composting toilets in each category starting with the simplest, least expensive and moving to the high end, most expensive composting toilet.

Ultra Low Cost Tiny House Composting Toilet

Camco Portable Toilet with Seat and Cover

13.4 x 16.1 x 13.8 inches.
Unit weights 4 Pounds.
5 Gallon bucket.
Add sawdust or peat moss after every use and periodically dump in an outside compost.

Best Low Cost Tiny House Composting Toilet

Bonergy Toilet with Removable Inner Bucket and Toilet Paper Holder (White)

17.5 x 14 x 15.32 inches LxWxH.
Extra Side Holder: Toilet paper roll holder with multipurpose storage shelf is large enough to hold various items such as phone, facial tissue, green plant, etc.
Leak-proof and Spill-free: This toilet is equipped with an inner lid and a tight-fitting toilet lid.
Inner Bucket measures 9×12×7 inches LxWxH.

Best High End Tiny House Composting Toilet with Electric Vent Fan and Optional Grey Water Drainage

Separett Villa 9215 AC/DC

The Villa 9215 will operate on either AC (standard household or on-grid), or DC (from battery or solar) power.
Features a single speed fan, with adaptors for both AC and DC to support venting to 20 feet.
Included are all parts required for direct vent and drain application.(Venting matches US pipe sizing), 10 compostable bags, 1 waste container w/lid.
Child seat available as an accessory.
Five year guarantee against manufacturing defects. Three year guarantee on the fan.
Ship weight: 34 lbs.
Box dimension: 18.5 x 23 x 27.75 inches.
The design of the toilet bowl catches the urine in a drain which is plumbed to a grey water system or holding tank.
The solid waste and paper are contained within the solid waste holding area in a compostable liner bag.

Best High End Tiny House Composting Toilet with Electric Agitator

OGO Composting Toilet – Power Agitator | Urine Diversion | Liquid Level Indicator

15 x 16 x 18.38 inches LxWxH.
Electric agitator with an easy to empty solids bin – 12 Volts (DC).
Modern, sleek compact design with very small footprint.
USA Made with direct human contact customer service.
Urine level indicator light with urine separating trap door mechanism.
2.4 gallon urine bottle and 25-30 use solids bin.
‎Unit weight 28 Pounds.

Best High End Tiny House Composting Toilet with Hand Agitator

Nature’s Head Self Contained Composting Toilet with Close Quarters Spider Handle Design (Granite color)

20.98 x 19.02 x 20.98 inches LxWxH.
Easy to install by any reasonably handy person.
Absolutely No Odor. No Maintenance. 5 Year Warranty.
26 Liter Capacity.
2.2 Gallon (8.3 L) urine bottle capacity.
2 people using full time will empty every 4-6 weeks. Easy empty in 5 minutes.
‎Unit weight 28 pounds.

Best High End Tiny House Composting Toilet with Airtight Separate Air Intake and Exhaust Pipes

Thinktank Composting Toilet

Brand New Composting Toilet solves major problems with existing compost toilets.
Airtight with separate air intake and exhaust pipes. No loss of heated or cooled air.
Men can stand when using!
Very easy to clean. No bowl to get messy. Waste is contained in compostable bag.
Easy to use. Never need to add peat moss or turn a handle.
25.7 x 22.5 x 21.8 inches
‎39 pounds
Made in Canada