I moved into my house 6 months ago and have been doing it up slowly. I have had all the floorboards up in the downstairs area and there is no water or damp issues, there is a void from the floorboards to the hard ground of approx 18" to 2 feet. The hallway leads into the kitchen and I noticed that the void under the kitchen floor which is a floating concrete floor with no access point is approx 4 to 4.5 feet deep. I noticed that there was a pool of water which never seems to go above a certain point (normally about 4 bricks high off the floor) no matter how much rain we have, but it never ever completley goes away. The previous occupier lived in the house almost all of her life annd her son said he did not know about the water. ( I guess If I was not nosey then I would never have known about it myself).
I believe that where I live, the water table is quite high. Can anybody give advice on whether this will be a problem or not and what I can do.