Top of concrete foundations at ground level

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Our concrete foundations poured a couple of days ago are at/just above ground level. Has the builder got this wrong?
 
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This is a picture at the side of the property. It's a corner plot and you'll be able to see the tarmac of the pavement behind the foundations.
 

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So is this a new build built by a developer or what? Come on give us some more info to work with.
 
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It's a rear and side extension to a semi detached property (1920's) on a corner plot. I've attached the engineer's design.
 

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Guess they have filled the trench to speed up getting out of the ground.

Surely it's still below ground level if the pavement is 10cm higher?

Mine is the same with the foundations only 15cm below ground
 
The top of the concrete trench is at its lowest around the lamp post. The rest is about 10cm above the soil level. I think the engineer's drawing shows that it should be approx 475mm below ground level.
 
Looks seriously wrong, nowhere for the deepened edge of the slab to go, no room for drainage in the (non existent) cavity below the dpc. Get your engineer to comment, it might still be soft enough to hack some out, easier if it's slotted with a Still saw first.
 
Is it even possible to construct the wall to the side extension if the concrete is almost at the same level as the pavement?

To the rear the concrete for the trench is running more like a path about 10cm above the soil.

It sounds like the builders need to replaced first.
 
Makes you wonder if they even dug it to the correct depth
 

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