Access can cost more than material
Hillside properties in Silver Lake, Echo Park, or the canyons often have no place to park a dumpster and no easy path for material. Carrying tile or plywood up a stair-street is labour, and it belongs on the estimate as labour rather than hidden in a lump sum.
Layers and disposal
Older LA homes frequently carry two or even three layers. Each one adds labour and dump weight. If the estimate does not state how many layers come off, the number is a guess, and guesses get revised upward mid-job.
Deck condition on older homes
Pre-war housing often has plank sheathing rather than plywood, which can change both the work and the cost once it is exposed. A written per-sheet or per-square-foot decking price protects you from negotiating on the day of discovery.
Flashing and the details
Chimneys, skylights, parapets, and wall intersections are where roofs leak. Reusing old flashing lowers a bid and raises your risk. Confirm what is being replaced rather than reused.
Frankly