L7 Principal Development LLC.
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L7 Principal Development has been providing high quality general contracting services in the Bay Area since 1986. We are fully insured, bonded and licensed, and are LEED Certified Professionals. We specialize in a wide variety of contracting services including home additions, remodeling, home improvements, construction services and much more.
10/28/2025
12/10/2024
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Telephone
Address
860 E Lewelling Boulevard
Hayward, CA
94541
Opening Hours
| Monday | 7am - 5pm |
| Tuesday | 7am - 5pm |
| Wednesday | 7am - 5pm |
| Thursday | 7am - 5pm |
| Friday | 7am - 5pm |
| Saturday | 7am - 3pm |
