Cost of installing a new Fosse?

Hi
We are just trying to cost out the renovations on a property we are looking and would like to know if anyone can give me a ballpark figure for the costs involved?
Thanks in advance.

Unfortunately the figure will depend entirely on how big is your ballpark. What sort of size fosse? What sort of filtration? Is it a permanent or holiday home? How many bedrooms? Do you want to extend at a latter date?
You may get so many variable answers, it would be a nonsense. Call Russell Waite, he is the man to help you. 05 55 80 00 57 rsw.entreprises@orange.fr www.legrandbourg.com

We paid about 8 000 € to change the Fosse and install 66 meters of drain.
The fosse is 3 000 liter. That's for 4 bedroom after you must add 1 000 l per bedroom.

Thanks for the quick replies and sorry to be so vague!!!
First the facts as I know them, the fosse will have to manage a 2 bed farm house and 2 bed Gite.
Now to show my complete ignorance! I had assumed it would be emptied by truck once every few months but reading more since then together very19's kind answer it appears that they have to drain off to a spring/reedbed/soak away. Can you straighten me out on how they work?

Ah just followed your link Le-Dolly to Russell's site where all is revealed. Now I understand why it's impossible top ballpark the cost. Simply be content with the assumption it's going tone expensive!
Many thanks.

KimatHorbling wrote: Can you straighten me out on how they work?

How they work... Making big holes within the garden and leaving a wasteland behind them   Forget your lawn!

How to explain. Maybe an image will be best


You can find many drawings on the web explainig principle
https://www.google.fr/search?tbm=isch&hl=fr&source=hp&q=assainissement+non+collectif&gbv=2&oq=assainissement&gs_l=img.1.1.0l10.2734.7015.0.9890.14.7.0.7.7.0.281.968.1j4j1.6.0....0...1ac.1.34.img..1.13.1124.52sb7NW42pE