The city splits single-family standards into three areas, each with its own article of the Zoning Code. Article 24 governs the Central Area. Article 25 governs the Hillside Area, adding landform alteration and view preservation. Article 26 governs Trousdale Estates, including standards for construction related to level pads. Verify your address on the city zoning map before assuming which set applies to you.
Design review is the other split. In the Central Area, work visible from the public street can trigger it, including a new house, a facade remodel, window replacement, and painting. Those projects run as Track 1, a staff-level review by the city's Urban Designer, or Track 2, a review by the Design Review Commission. Track 1 requires two things: a project designed by an architect licensed in California, and a design the city's Urban Designer judges to be a pure architectural style under the Beverly Hills Single Family Style Guide. Miss either one and the project goes to Track 2. There is no design review process in the Hillside Area of the city.
Trousdale changes the build itself. Pad and grading standards under Article 26 mean the design works with the existing pad rather than around it. Narrow hillside streets mean staging, deliveries, and neighbor access get planned before demolition, not during it. We bring that plan to the walkthrough instead of discovering it in week three.