What the rules say about windows
The EPA’s minor-repair exemption stops at 6 square feet per room indoors and 20 square feet outdoors, but window replacement is covered regardless, and the rule bans open-flame burning and dry sanding without a HEPA shroud. Firms must hold EPA certification. CDPH says California’s own renovation regulations under SB 1076 are still being developed.
Permits
Whether a window change needs a building permit turns on what changes: opening, size, style. We have not confirmed how Novato treats like-for-like replacements, so ask the building division before ordering units. Lead rules apply either way.
What affects the cost
Number of openings, replace versus restore, the state of the frames behind them, upper-floor access and any sill that needs wood repair set the scope. Doors bring frame work, and a tenanted building brings scheduling.
Think of windows as the first stop rather than the whole house. For outside walls and trim, go to exterior lead paint removal. For a remodel that includes new windows, go to lead-safe renovation and remodeling. Novato Lead Paint Removal shows how the services connect, and the testing page applies to every one of them.