A1 Building Contractors LLC
About
A1 Building Contractors LLC is a dedicated adu builder serving Granite Bay, CA. With 20 years of experience in the construction industry, they specialize in detached adu, attached adu, garage conversion, jadu (junior adu), custom design, multi-unit adu, aging-in-place / ada, luxury adu. Veteran-owned design-build ADU contractor. CSLB #1094366. 1-year labor warranty, 10-year structural warranty. Serves Sacramento and Placer County. Email: andrew@a1buildingcontractors.com
Services Offered
Specialties
Quick Facts
Documented project and permit counts are directional proxies from mixed sources. They are not apples-to-apples and are not a quality ranking.
Helpful Resources
Sacramento ADU Permit Process: A Complete Step-by-Step Guide (2026)
12 min read
Sacramento ADU Cost Breakdown 2026: What You'll Actually Pay
10 min read
8 Costly ADU Mistakes Sacramento Homeowners Make (And How to Avoid Them)
10 min read
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