The biggest variables anywhere are cabinetry (stock versus semi-custom versus fully custom), whether the layout requires moving plumbing or a load-bearing wall, appliance tier, and countertop material.
Three more push it here. Coastal review adds review cycles rather than construction cost, so budget the schedule, not just the build. Older Village and Bird Rock homes frequently need electrical, framing, or Title 24 energy work once walls are opened. And access is a real line item: narrow hillside streets on Mount Soledad, constrained Village blocks, and private roads in La Jolla Farms limit equipment, deliveries, debris handling, and staging in ways a flat inland lot never does.