A new roof in Santa Monica is decided largely on paper. Slope, deck and covering come from the plans, and the zone sets the cool roof values.
Title 24 on new roof work
Santa Monica is in climate zone 6, where the state steep-slope values do not apply but low-slope values do. A new roof is all new work, so ask the building office how the Energy Code treats your plans. The 2025 code has been in force since 1 January 2026.
What the plans should show
Roof slope, deck material, underlayment, flashing at every wall and penetration, the covering, its fire class and its cool roof values. Name the vents. Show how a new roof meets an old one. The plans go to the city's plan-check staff.
ADUs and additions
A unit roof can match the house when pitch, weight and fire class allow. On the coast, use corrosion-resistant fasteners and flashing. If the existing covering is old, replace both slopes together.
Santa Monica new roof questions
How does Title 24 apply to new roof work in Santa Monica?
A new roof is all new work. Santa Monica is in zone 6, where steep-slope values do not apply but low-slope values do. Ask the building office how it treats your plans.
Can an ADU or addition in Santa Monica match the existing roof?
Often, when pitch, weight and fire class allow. Use corrosion-resistant fasteners on the coast, and replace both slopes together if the old roof is near the end of its life.
What should the plans show for a new roof in Santa Monica?
Slope, deck material, underlayment, flashing, the covering, its fire class and cool roof values, vents, and how the new roof meets the old.