Poured too much concrete

[irankhan2027]

My builder poured too much concrete for the footings, and the surface ended up higher than the floor level of my existing house. Because of this, there wasn't enough room to lay even a single course of engineering bricks.
We started breaking out some of the concrete using a Titan breaker to lower the level, but this has left the surface uneven, with lumps, dents, and rough areas.
I'm no longer dealing with the builder, so I'm trying to work out the best way forward myself.
What's the best way to create a smooth, level surface suitable for laying the first course of engineering bricks? Would a levelling mortar bed be sufficient, or is there a better approach

 

[Lower]

How much do you need to lower the footings by?

 

[irankhan2027]

It has already lowered by approximately 15 cm. I will wash the footings to get clear pictures of the uneven surface.

 

[stevie888]

A bit of roughness won't hurt in the least

 

[Ivor Windybottom]

It looks like it follows the slope of the ground, so is higher on the right of the door?

Given the obvious level of cowboyishness, I'd be more worried about whether it's deep and wide enough to support a building. Do you have photos of the trench before filling, or did you measure its depth and check it was down to clean subsoil? i.e. not black or brown.

Unless you're certain it's definitely OK then the answer may be to break out the whole lot and start again.

Are planning and building control involved? If they aren't they probably should be, looking at the scale of it and the adjoining neighbours.

 

[irankhan2027]

This is the current state of my footings. How do I make the surface smooth for brickwork?

 

[foxhole]

What is the project? How wide are current footings?

 

[irankhan2027]

500-600mm wide and deep

This is a 6m × 6m single-storey extension with one beam in the middle, while the original rear wall will remain in place.