I am wondering whether caissons are expensive more because of the material, or because of the cost of drilling into bedrock.
would it be more efficient to place one giant fat caisson that then forks above ground, or many thinner caissons that all have to be placed far down?
where would I find information about typical prices for caissons these days in CA? any pointers would be appreciated. most of the pricing info I found on this website is >20 years old.
(I want to build on an unstable slope in Los Angeles, so I know I will have to go 80' down, because bedrock is 40' down.)