Underpinning - Basement Digout - Washington DC

[Tarique Jawed]

We have several projects in DC that we need to dig out our basement.  Most basements in DC are too low to get legal heights.  I'm looking for some rule of thumb numbers to understand the costs.

Price LF  Footings:

Price SF Slab Break and Replace:

Price CY excavation:

Price Block or SF - Block Foundation Walls:

Assume a 5 stage underpin as well.  We have taken care of engineers and permits.

Assume that there is reasonable access from the rear of the property - and these are all attached row homes.

If anyone has recommendations for a good subcontractor we are all ears.  If we end up using them - we are happy to pay a referral fee.

Thanks in advance.