Building an ADU !

Let's break down the conservative build costs for a high-end Accessory Dwelling Unit (ADU) of 1,200 square feet in CA, where luxury and high-quality finishes are prioritized.

1. Site Preparation and Permits

• Site Survey and Engineering: $15,000
• Permits and Fees: $25,000
• Site Clearing and Grading: $10,000

2. Foundation

• Excavation: $10,000
• Foundation (concrete slab or raised foundation): $30,000

3. Structure

• Framing (labor and materials): $60,000
• Roofing (high-end materials): $25,000
• Windows and Doors (custom, high-efficiency): $40,000

4. Exterior Finishes

• Siding and Exterior Trim (premium materials like stucco or wood): $30,000
• Paint and Finishes: $15,000

5. Interior Finishes

• Insulation: $10,000
• Drywall and Interior Walls: $20,000
• Flooring (hardwood, tile, etc.): $40,000
• Paint and Wall Treatments: $15,000

6. Mechanical Systems

• Plumbing (high-end fixtures): $35,000
• Electrical (high-end fixtures and smart home features): $35,000
• HVAC System (high-efficiency): $25,000

7. Kitchen and Bathroom

• Kitchen (custom cabinetry, high-end appliances): $75,000
• Bathrooms (luxury fixtures and finishes): $50,000

8. Additional Features

• Built-in Storage and Custom Millwork: $25,000
• Lighting (custom and designer fixtures): $20,000
• Smart Home Integration: $15,000

9. Landscaping and Exterior Amenities

• Landscaping (high-end design and plants): $30,000
• Outdoor Living Space (deck, patio, etc.): $25,000
• Fencing and Gates: $15,000

10. Contingency and Miscellaneous

• Contingency (10% of total costs): $48,500
• Miscellaneous Expenses: $10,000

Total Estimated Cost

• Grand Total: $553,500

This estimate is based on conservative, high-end assumptions for a luxury ADU in CA. Costs can vary based on specific design choices, site conditions, and other variables. It's advisable to consult with local builders and contractors for a more accurate and detailed quote tailored to your specific project requirements.