Depends, probably you will have to apply to the Coastal commission, submit number of reports like seismic, soil, structural integrity etc. It takes a long time, since this is akin to new construction, and CC governing Malibu (don't know if they also control Topanga) is very strict - Sun Feb 10 2008, 23:22
Depends if you have to reinforce down to the bedrock, or make other pre-construction structural enhancements. Generally it is between $ 250 and 300 psf. - Sun Feb 10 2008, 23:18
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