California Shop Homes & Adus

  • Architectural drawing of a two-story house front elevation with a two-car garage, front porch, and multiple windows.

    Design and Pre-Construction

    Estimated Cost: $10,000 – $35,000

    This phase includes a full site evaluation, preliminary design, floor plan layout, utility review, Title 24 energy reports, and engineer-stamped construction drawings. We help prepare everything you need to submit for permits and get the project approved.
    We also help determine zoning compatibility and walk you through cost-saving strategies from day one.

  • Construction site with red steel beams and scaffolding, dirt ground with small piles of dirt and scattered leaves.

    Site Work and Foundation

    Estimated Cost: $12 – $25 per sq ft

    Once permits are approved, you’ll begin site prep. This includes grading, trenching, and pouring the slab foundation for both the shop and ADU portions. Depending on your location and soil conditions, this may also include minor grading or pad work, as well as utility trenching for water, sewer/septic, electric, and gas.

  • Large beige house with a covered porch on a vast grassy lawn under a partly cloudy sky.

    Steel Building Package and Erection

    Estimated Cost: $50 – $70 per sq ft

    This includes your factory-direct steel building package, delivery, and erection. Each structure is engineered specifically for your location (wind, snow, and seismic loads). Insulation systems, roll-up doors, framed openings, windows, walk doors, and wall/roof panels are all included in this package.

  • Close-up of three gas meters with pipes connected above, mounted on a wall.

    Rough Utilities and Systems

    Estimated Cost: $15 – $25 per sq ft

    This covers all rough-in work for plumbing, electrical, HVAC, and mechanical systems. It includes utility tie-ins, subpanels, water lines, gas lines, and ductwork for heating and cooling. This is the infrastructure that turns a structure into a functioning home.

  • Indoor sports facility with a basketball hoop, a volleyball net, and a rock climbing wall on the back wall.

    Interior Build-Out and Finishes

    Estimated Cost: $50 – $100 per sq ft

    This is where the project becomes your vision. It includes framing, drywall, interior doors, flooring, cabinets, countertops, appliances, trim, tile, paint, lighting, bathroom fixtures, and kitchen build-out. Finish costs vary depending on your style, layout, and purpose—whether you’re building for family, rental, or resale.

  • A large black metal garage with two doors, a small side porch, and a black pickup truck parked in front. Green grass surrounds a concrete driveway and neighboring homes are visible in the background under a partly cloudy sky.

    Total Project Estimate

    Shop ADU Example:
    1,200 sq ft ADU + 2,000 sq ft Shop
    Estimated Total: $290,000 – $524,000

    Shop Home Example:
    3,000 sq ft Home + 2,000 sq ft Shop
    Estimated Total: $475,000 – $900,000+

    Use $125 – $250 per sq ft for the livable space
    Use $50 – $80 per sq ft for the shop or garage space