Ok, the building is already built, its my building. At the time I was not aware of the rules so never took a position on the matter. The building control do not know about the soakaway that already exists. The soakaway is 2 metres from my new build. The water company will not let me combine my foul water with the surface water so I cannot use the man hole for the foul water to send the surface water.
Distance to the point where I can connect a surface water pipe to the water companies pipe is quite far and the cost is upwards of £18,000.
Should I mention to building control about the existing soak away, and risked them ordering me to also move this soak away.
The ground drainage rate isnt to good because it is clay based.
I could just get 5 metre distance for a new soak away from the new build but because of the slow rate of soakaway this may not work, could there be a case to make the soakaway much larger?
Thanks so far for your time to answer.