Dropping floor level in new extension

houseyhouse

I am considering dropping the floor level in part of the back of our new extension (c. 12sqm) to provide a sense of separation between that area and other parts of the open plan space. The site the house is on is pretty level but the floor of the house of a good 12 inches + above outside ground level at the moment. Roughly what would the costs involved in dropping the floor to ground level be?

Gant21

€5k by the time the last concrete truck leaves.

houseyhouse

Thanks. Is it the extra excavation that costs?

C. Eastwood

Is the floor of the extension Existing or Proposed?

I would not have a step in the internal floor of a dwellinghouse.

I would fit all steps outside external doors, and in compliance with the Building Regulations

houseyhouse

https://www.boards.ie/discussion/comment/119316029#Comment_119316029

I would like to drop the floor in part of an extension which is not built yet. I like level changes between different parts of the open plan space because it makes the spaces feel separate while still being connected. I understand there are issues around mobility access etc.

C. Eastwood

https://www.boards.ie/discussion/comment/119323467#Comment_119323467

Yes houseyhouse, I understand that some people like a split level house with the ground floor at different levels with 1 or a few steps.

The Building Regulations are for the Health Welfare and Safety of persons.

Because of family and guests and very young children and elderly persons, I would not have steps in the ground floor of my home.

However, if you decide to do it, there are excellent details on the Damp-proofing for stepped floors in Homebonds House Building Manual.