Footings for another storey

Question

Hello, I have a single storey extension on the side of my house.  My Dad had the house before me and had the extension built, which the builder at the time, stated that the footings he did, would be strong enough, for another storey at a later date.

So how deep or wide would footings need to be for another story please?

Harry · Answer

Usually as standard practice in today's world building control ask for 1m+ in depth, 600mm wide squared off and would usually require test holes to be dug for inspection at a couple of points to evidence the depth. In the worse case a structural engineer would be best placed to design a solution should your footings be less than this.

Hope this helps!

Ola · Answer

The footings for double storey extension should  be 500 wide x 1mtr depth

Chris · Answer

Hi its normally 200mm  8 inches 
But also depends on nature of build    soil ect

Ian · Answer

Footings for Building Control Regulations should be 620mm wide and 1m deep plus depending on ground conditions and any trees or hedges in close proximity.  Regards Ian

Jim · Answer

Only way is to dig down and expose section of old footings get a inspection done from build control may after underpin old footings if not substantial enough to take another storey on them or a structural engineer

Doug · Answer

Hi building regulations have changed over the years you would need to have someone in to inspect and check if they would be acceptable.
There should be plans with the council that would say what was done originally and they would be available to you if you speak to your local planing office

Footings for another storey

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