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Dunster House Ltd.
Incorporated. 1994
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Collection: Monday – Friday (9:00 – 17:00)
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Smell can often be a big deterrent with toilets but due to the urine and waste separated, the process of fermentation is prevented, and so are the odours. Further protection against unpleasant odours is improved by the ventilation pipe with a fixed air vent to direct the flow of air to ensure the Eco Composting Toilet is well ventilated.


This eco-toilet is made from Wood Plastic Composite and high quality slow grown spruce. We use this type of spruce wood as it is less porous and resinous than pine, spruce is also less likely to shrink, warp or split. It is also less likely to produce sap runs which can ruin your clothes if it comes into contact with them. This is why we prefer to use spruce rather than pine. 

Product Features
Eco Toilet Waterless Sink
Humanitarian Waterless Sink
Our Compost Toilet features a Urine Diversion System which reduces the water used and wasted on flushing, and is ideal for locations without access to a sewerage system or or which have a lack of readily available  water.
Humanitarian DIY Product
Humanitarian DIY Icon
Easy DIY
The Compost Toilet is designed to be easily installed and comes with clear instructions and the necessary fixing pack.
Humanitarian Reusable Waste Tank
Reusable Waste composting toilet dunster house
Reusable waste
The Compost Toilet allows reusing wastes after being separated by the Urine Diversion System. By storing them and following the correct procedures for an adequate time they can be reused as either fertilizer or compost.
Avoid Planning Permission composting toilet under 2.5m
Avoid planning permission
All our buildings marked with this symbol are under 2.5m high.
Why does this matter? Well, under permitted development rights someone can place a garden building as close to a boundary as they want without planning permission unlike buildings that are over 2.5m high which would need to be placed over 2m away from any boundary.
If you want to find out more about permitted development rights see our planning guide
Avoid Unpleasant Odours sand bucket composting toilets
Avoid Unpleasant Odours with plastic vent composting toilet
Avoid unpleasant odours
The odour you associate with portable toilets is caused by a mixture of bacteria when solid and liquid waste combines in one bowl. Our Eco Toilets separates the urine and solid waste immediately, preventing the process of fermentation and reducing the unpleasant odours commonly associated with portable toilets. There is also an automatic fan inside a ventilation which all helps to miminise odours. 
composting toilet plastic Ventilation
composting toilet plastic Ventilation
The Compost Toilet has a ventilation pipe with a fixed air vent to direct the flow of air and ensure your eco toilet is well ventilated.
Slow Grown Spruce wall panels
Slow Grown Spruce timber
Slow grown spruce
We use slow grown spruce for the walls of all our interim housing as it is better all round than pine! Our mature timber is much less likely to shrink, warp or split. It is also less likely to sap, which means it is not going to ruin your clothes or furnishings.
Solar Powered composting toilet
Solar Powered composting toilet with open door
Solar powered
Our Composting Toilets can stand independently from electricity sources due to the solar panel on the roof. This solar panel charges a 12V battery pack (not supplied) which, in turn, powers an electric water pump that feeds water through to the sink so you can wash your hands. This also powers a multi-charging point which helps to keep the phones charged.
How high is this Eco-Toilet?
A: It is 2.38m (7' 9") high
Does this Eco-toilet need to be plumbed in to a water source?
A: This Eco-Toilet does not need to be plumbed in to use. The sink system works off a container that must be filled up with water. The Toilet system is designed to not need water to function.
Can this Eco-Toilet be painted?
A: This Eco-toilet can be painted to suit your style, using a high-quality ranch paint.
Do you need to run electrics to this Eco-Toilet?
A: This Eco-Toilet is self-sustaining due to the solar panel, which powers the water pump and 12v light.

We deliver our products to mainland United Kingdom (England, Wales and Scotland). Some exceptions apply; these are illustrated on the map below.

Scottish areas may be subjected to slightly longer delivery turnarounds, please contact us for details. FREE delivery on selected products over £200 to mainland England and Wales.

Delivery to postcode areas PL, TQ, TR, EX may take 1 week longer, beyond the delivery shown on the product page.

Delivery Price

Green - £19.99 delivery fee on all orders under £200.

Blue - Delivery to postcode areas PL, TQ, TR, EX6, EX7, EX20, EX21, EX22, EX23, EX39 may take 1 week longer, beyond the delivery shown on the product page.

Yellow - £59.99 delivery fee.

Orange - £84.99 delivery fee.

Red - We are unable to deliver to these areas.

Assisted Delivery

If you cannot provide an able bodied person to offload the vehicle with the help of our driver, we can provide additional manpower with our Assisted Delivery Service. The driver will arrive with some help to unload the lorry, meaning that you can put your feet up.

We offer this service on all items that are delivered, we do not offer this on our couriered products. Prices for this service can be found on individual products.

Should you require further information on our standard or assisted delivery services, please contact a member of our Sales Team.

Scottish areas may be subjected to slightly longer delivery turnarounds, please contact us for details.

To ensure the very best quality, we only use slow-grown White Spruce Timber, which is harvested in cold climates to ensure solid, dense log rings. This gives the wood superior strength and longevity, and also a much more consistent colour than the likes of Pine.


Despite the care we take in selecting the very best Timber available, it’s not like predictable brick or cold steel, this natural material has characteristics and quirks unique to every log.


Because our timber logs once fed water and nutrients back and forth from its roots to its leaves, its very nature is to be porous and swell up when it gets wet. Any wooden product will do this throughout its life, but there are a few things you can do to help limit this movement.


These include:

1. A great design!

  • Don’t worry, we’ve got this one covered. We’re experts when it comes to all things timber, so we have designed our products from the ground up with its natural properties in mind.

2. Water Repellent Treatment.

  • How you customise and decorate your product is up to you, however we would recommend that you use an appropriate water repellent treatment. This really helps minimise the amount of moisture that the timber can absorb. Therefore minimising the risk of any major movement.
  • (Please note: water repellent treatment is not the same as pressure treatment, which protects against rot and insect infestation, and which we guarantee for 10 Years!)

3. Ventilation.

  • Keeping your timber building ventilated is no less important than keeping your house well ventilated. This is especially true if you plan to cover up your floorboards with something (double check with an expert, that the material is suitable to do so), as moisture can become trapped between layers of non-breathable materials and build-up, leading to floors becoming rotten.

4. Regular Seasonal Maintenance.

  • Whether you opt to build your product yourself, or have us do it for you, don’t be afraid to tighten the odd bolt here and there. Your product is a life improving investment, so it’s only right to give it some love and care from time to time. Make sure that it’s properly treated before the rainy months, and you make adjustments to doors and window frames, when needed.


Natural Timber Properties

After building your timber product, this natural construction will begin to ‘settle’. This means that you will likely see some natural timber imperfections appear. These types of natural imperfections can include:


  • Cracks


Cracks On Wood


  • Splits

Splits On Timber Held With A Green Rounded Safety Cap

  • Shakes


Shakes On Wood Panel


  • Warping / Twisting

Warped wood panels, twisted Wood panels


  • Expansion and Contraction


Expansion And Contraction Of Wood On Garden Building


Please be aware that, as these are natural timber properties they are not considered as defects under our Terms & Conditions (for more information, check out our Ts&Cs here). However, in most cases, these imperfections will not impact the integrity or function of your timber product, and/or can easily be rectified. For advice on how to rectify these and for more support, please get in touch with our Customer Services Team on


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