Toal Engineering
944 Airole Way
Custom Residential, Los Angeles CA
Project Details
The One, billed as “the largest and grandest house ever built in the urban world,” is a 105,000 sq. ft. private residence in Bel Air, situated on a ridgeline overlooking the Bel-Air County Club and UCLA, with 360-degree views of the city, the Santa Monica Mountains, and the Pacific Ocean.
Services provided:
- Grading/Drainage Plans
- Standard Urban Stormwater Mitigation Plan
- Storm Water Pollution Prevention Plan

