L7 Principal Development LLC.
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Commercial, Residential, General Contractor, #builder ,#management, #consulting services
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.
08/25/2026
Built Right. Done Right.
From repairs and renovations to full construction projects, L7 Principal Development delivers quality workmanship you can count on. Honest service, dependable crews, and results that last.
Call us today for a free estimate: (415) 990-2139
L7 Principal Development — Building trust, one project at a time.
L7 PRINCIPAL DEVELOPMENT INC.
Built Right. Done Right.
From repairs and renovations to residential and commercial construction projects, L7 Principal Development delivers quality workmanship you can count on. Honest service, dependable crews, and results that last.
Call us today for a free estimate: (415) 990-2139
L7 Principal Development — Building trust, one project at a time.
07/29/2026
03/30/2026
They drove me out of the crib, but there are other places for the God…..1Love
01/16/2026
I had tom learn this the hard way…. my way up!
If I get any hint of toxicity, I’m gone! Time is a currency that we can never get back.
01/13/2026
The crew
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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 |
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