We are proposing to install a footing/foundation next to a two story brick building with a deteriorating loose rubble wall foundation installed on fill. The depth of the existing footing is 4'. Adequate bearing material is at 10'. We do not want to underpin the existing building because there are already signs of settlement (vertical cracks in wall) and we are afraid of causing additionl damage during the process. The neighbor is a big problem and we do not want to touch her building. We propose to excavate down 4' to match the adjacent footing and install helical piles to the bearing stratum. We then step the foundation wall away from the existing building and excavate 6' more to the desired depth of cellar level.
Is there an easier, more cost effective way, of installing this foundation?
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