Jackson & Sands Engineering

Jackson & Sands Engineering, Inc. is a California-based civil, structural, and architectural engineering firm with offices in Chico and Grass Valley. Founded by Sean Jackson, P.E. and Frank Sands, P.E., the firm combines more than 30 years of combined engineering and construction experience to provide innovative, permit-ready residential and commercial design solutions. The company is widely recognized for its expertise in Accessory Dwelling Units (ADUs), offering custom engineering services, structural design, and one of California’s largest collections of pre-designed ADU plans.

Jackson & Sands Engineering provides comprehensive ADU planning services throughout California, including architectural design, structural engineering, site planning, and permit-ready construction documents. Homeowners can choose from dozens of professionally engineered ADU floor plans available for immediate download or work with the firm’s design team to develop a fully customized solution. The company has also partnered with numerous California cities and counties to create pre-approved ADU plan programs, helping streamline permitting and accelerate housing development.

Services

• Custom ADU Design
• Pre-Designed ADU Plans
• Permit-Ready ADU Plans
• Free ADU Plan Downloads
• Architectural Design
• Structural Engineering
• Residential Home Design
• Home Additions
• Remodel Design
• Site Planning
• Foundation Design
• Structural Calculations
• Civil Engineering
• Bridge Design
• Retaining Wall Design
• Multi-Family Design
• Commercial Structural Engineering
• Construction Consulting
• Permit Coordination
• Engineering Reports

Why Choose Jackson & Sands Engineering?

• Over 30 years of combined engineering experience
• Licensed Professional Engineers
• Specializes exclusively in permit-ready engineering solutions
• Dozens of customizable ADU plans available immediately
• Custom architectural and structural design services
• Trusted designer for numerous California pre-approved ADU programs
• Extensive knowledge of California ADU regulations
• Practical engineering backed by real-world construction experience
• Serves homeowners, builders, developers, and government agencies
• Projects available throughout California