Hillside Foundation cost

Member since 2019 · 1 post · 0 votes

Hi everyone,

I have a general question and any answer will be appreciated.

I am in thinking of purchasing lot in Los Angeles, CA. The lot is very sloped, to give you an idea, it is 140 feet in lenght and it slopes down 85 feet. I am planning to build 4,000 sq ft house including the garage on three levels. To have a solid return on this project; I don’t want to spend more than 300k on the foundation. Is this doable? If not, what would the worst case scenario be. I know this is very general question, but any input wil be highly appreciated.

Thank you in advance. Igor

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Jay HinrichsBusiness Member

Real Estate Consultant · Summerlin, NV · Member since 2014 · 45k+ posts · 66k+ votes

Originally posted by @Tim Johnson:

Nobody should give you a ball park on this item. Get a blueprint and then get a quote. That's not a cookie cutter foundation, you need someone who knows what they are doing and can provide you with a price.

No kidding Tim.. First thing out of the gate is a geo tech report.. give that to a civil then they design structure then give to architect to design the home.. who knows how much it could cost..

even on flat ground .. I am doing two 2 mil specs in Charleston on flat sand but still having to put in Helical piers about 40 each house at 1500 a pop. and thats flat ground.. so that foundation system will be 100k each house.

No way anyone ball parks this without site inspections and licensed professionals signing off on it.. City will demand it any way.

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Tim Johnson
Lender · Grand Rapids, MI · Member since 2018 · 703 posts · 446 votes
7y
Nobody should give you a ball park on this item. Get a blueprint and then get a quote. That's not a cookie cutter foundation, you need someone who knows what they are doing and can provide you with a price.
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Jay HinrichsBusiness Member
Real Estate Consultant · Summerlin, NV · Member since 2014 · 45k+ posts · 66k+ votes
7y
Originally posted by @Tim Johnson:
Nobody should give you a ball park on this item. Get a blueprint and then get a quote. That's not a cookie cutter foundation, you need someone who knows what they are doing and can provide you with a price.
No kidding Tim.. First thing out of the gate is a geo tech report.. give that to a civil then they design structure then give to architect to design the home.. who knows how much it could cost..
even on flat ground .. I am doing two 2 mil specs in Charleston on flat sand but still having to put in Helical piers about 40 each house at 1500 a pop. and thats flat ground.. so that foundation system will be 100k each house.
No way anyone ball parks this without site inspections and licensed professionals signing off on it.. City will demand it any way.
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Xander Tertychny
Developer · Los Angeles, CA · Member since 2019 · 19 posts · 14 votes
7y
@Igor Gjorgjiev Definitely a lot of unknowns at this point.
Prior to getting a soils report (geotech), you should have the an idea of where the house will be on the property, so the soil samples are taken from close to where the perimeter of the house is, otherwise you'll need to have to soils engineer back out later to take additional samples. Based on the soils report, the engineer will give recommendations for structural foundation design.
Another thing to consider is the floor elevations of each level. If you're excavating the flat pads into the hillside, you're spending the money on retaining walls; if you're building out away from hill, it could be easier to have a series of caissons support the structure. All of this will also depend on site access and how steep the hill is, since you need have heavy machinery and equipment navigate the site, and site grading will also be a part of the overall cost to get the foundations in place.
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Robert ChuangPro Member
Realtor · Arcadia, CA · Member since 2014 · 145 posts · 46 votes
7y
@Igor Gjorgjiev I am building a hillside and (4 other projects in permitting, all hillside) in LA. If you need advice or have any question let me know.
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