
Room Addition Cost in West Hills, CA (2026 Pricing Guide)
Room additions in West Hills run $55Kβ$380K+ in 2026. 4-tier pricing (basic room $55K-$85K, bedroom+bath $85K-$160K, master suite $160K-$250K, second story $220K-$380K+), 15-line per-component cost table, 4-neighborhood guide (Shadow Ranch, Fallbrook/Pierce College, Orcutt Ranch, Platt Village), LADBS permit process (4-8 week plan check, $3.5K-$15.5K fees), pre-1980 asbestos costs, fire zone VHFHSZ costs ($6K-$18K adder), ROI 50-65%, timeline table, 5-city comparison, and 6-question FAQ.
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