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  • Compost toilets

    Price: £30.00 (one off payment)

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    This online course contains over 3 hours of video, plus an entire e-book on how to build, purchase, use and maintain a range of different compost toilets.

    Here’s an introduction to compost toilets, and see the right-hand column for more resources.

    See here for our other online courses.

    This course explains how to build a range of different compost toilets, from the very basic to luxury models. It includes the large-scale – a toilet block for a campsite; and the small-scale – a toilet extension for a house, plus retrofitting a compost toilet indoors. It deals with the theory of how they work, including urine separation, using the compost, and keeping everything ticking along nicely. After taking the course, if there’s still anything you don’t understand about compost toilets, you can ask Cordelia, the tutor.

    Cordelia Rowlatt: compost toilets online course expert tutor


    Cordelia Rowlatt runs Vallis Veg in Somerset with her partner. They are off-grid, and have a range of compost toilets for themselves and for their campsite. This is how she describes herself: ‘I’ve built and used many compost toilets for different situations, as well as lived toilet-free when travelling with a gypsy circus – lesson learned: never take your toilet for granted! I also processed urine and faeces to feed crops safely.



    1. Introduction (pdf)
    2. Introduction (video)
    3. What is a compost toilet? Components (pdf)
    4. Decompostion (pdf)
    5. Carbon:nitrogen ratio (pdf)
    6. Pathogens / hygiene (pdf)
    7. A bit of history (pdf)

    Examples of toilets

    1. Basic bucket toilet (pdf)
    2. Basic bucket toilet system (video)
    3. First Vallis Veg toilet (pdf)
    4. First Vallis Veg toilet (video)
    5. Market garden and campsite toilets (pdf)
    6. Market garden toilet (video)
    7. Campsite toilet (video)
    8. Campsite washblock toilet (pdf)
    9. New campsite toilets (with waterless urinal) (video)
    10. Our first house toilet (pdf)
    11. The house toilet (inc. pest control) (video)
    12. Processing the urine and faeces (pdf)

    Benefits, options, other processes

    1. Benefits: comparisons with other systems (pdf)
    2. Benefits: water, soil, pollution, energy, cost (pdf)
    3. Buying a compost toilet (pdf)
    4. Various types of basic compost toilet (pdf)
    5. What happens to the urine? (pdf)
    6. Urine separation and processing (video)
    7. Faeces treatment (video)
    8. Wormeries (video)

    Building a compost toilet

    1. Building an indoor compost toilet: tools, materials, planning (pdf)
    2. Chambers (pdf)
    3. Hatch (pdf)
    4. Urinals & drains (pdf)
    5. Steps & platform (pdf)
    6. Vent (pdf)
    7. Seat (pdf)
    8. Handbasin, fly-trap, extras (pdf)
    9. Building a toilet as a house extension, part 1: introduction (video)
    10. Part 2: tools (video)
    11. Part 3: flue (video)
    12. Part 4: room, chambers, accessibility & separating systems (video)
    13. Part 5: connecting the urine tank (video)
    14. Part 6: the seat (video)
    15. Part 7: waterless urinal (video)

    Use, maintenance, troubleshooting, conclusion

    1. Use and maintenance (pdf)
    2. Questions and troubleshooting (pdf)
    3. Regulations (pdf)
    4. The future (pdf)
    5. Conclusion (video)

    Compost toilets online course

    See here for our other online courses.

    Thanks to Cordelia Rowlatt and Studio Nima.

    There’s a crash coming – a slap from Mother Nature. This isn’t pessimistic; it’s realistic.

    The human impact on nature and on each other is accelerating and needs systemic change to reverse.

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