In Kern County, deciding on roofing dumpster means deciding on stripped shingles, which are dense enough that roofing containers are deliberately small first. A job in California City draws on the same fleet that services Kern County, which is why the price shifts depending on which side of town you're on. Dirt, concrete, brick and tile carry weight that outruns their bulk, so the container built for this job is shallow and stops loading long before it looks full.
Ask what the cancellation window looks like if the delivery date needs to move. Some yards charge nothing with a day's notice, others charge a restocking fee. The choice you are actually making in California City comes down to this: nobody knows how many layers are up there until the crew opens the roof, and each one adds tonnage. California homes built in the pre-war bungalows through 1960s-70s slab tracts produce a different mix of debris than newer construction, and that mix is what a hauler is actually pricing.
pre-war bungalows through 1960s-70s slab tracts construction is common across Kern County, and that vintage, more than the room count, is what a hauler expects to find in the debris. roofing work in California City defaults to a 10 or 15 yard box, and that default holds until the material says otherwise. You would be in familiar company: roofers and homeowners handle this more than anyone. Coverage in California City comes from operators circulating through Kern County; where exactly you sit in that loop can move the number. The dividing line is simple: your property needs nothing extra, the public right-of-way needs city encroachment permits, CalRecycle diversion reporting. A container blocking a fire hydrant or mailbox gets flagged by the city faster than one that's simply in the way.