Remodeling in Los Angeles is seeing a very active period and it is not stopping any time soon. Interest rates are low and property values are rising steadily. House flipping is very popular and I have seen run down and neglected houses, less then 1000 sf, sell for $400,000 in the hopes of fixing it up and selling at a quick profit. Rents are also on the rise with building owners fixing up the unit and increasing rents as soon as someone moves out.
All this means that licensed contractors, engineers, designers are busy. That said, it is no excuse for them to take on more work then they can respond to quickly and do well. Most contractors are not good at organizing their businesses which leads to delays in production, calls not returned, and mistakes made as they fly by the seat of their pants. The good ones will follow up and still provide quality service as a good review from you is valuable. They will answer your calls and always try to do the right thing. Keep in mind that remodeling is a different animal. One never knows what is in the walls until work starts so be prepared for surprises. This is not the contractors' fault. I recently spoke a home owner that asked why screw head were visible in the ceiling after the house was re-roofed. We concluded that the motion and vibrations on the roof carried to the dry wall and shook some dry wall compound loose. The original builder had a bad reputation and as this problem usually does not happen, the roofing contractor really is not to blame.