Professional ADU Construction Services for Your Property
Adding an Accessory Dwelling Unit (ADU) is one of the smartest investments homeowners can make today. Whether you want to generate rental income, provide private space for family, or increase your home’s value, hiring professional ADU construction services ensures your project is completed efficiently, legally, and with high-quality results.
What Are ADU Construction Services?
ADU construction services cover every stage of building a fully independent residential unit on your existing property. These services include design, permits, engineering, construction, utilities setup, and inspections.
An ADU (Accessory Dwelling Unit) is a self-contained home with its own entrance, kitchen, bathroom, bedroom, and living space. ADUs are ideal for rental income, multigenerational living, guest housing, or home offices.
Why Homeowners Choose ADU Construction Services
✅ Rental Income Potential
An ADU can generate steady monthly income by providing long-term or short-term rental opportunities.
✅ Multigenerational Housing
Offer aging parents, adult children, or extended family independent living space close to home.
✅ Boost Property Value
Homes with legal, well-constructed ADUs typically sell for more due to added square footage and flexibility.
✅ Flexible Living Solutions
ADUs can serve as guest houses, offices, studios, or retirement housing.
✅ Help Solve Housing Shortages
Many states, especially California, actively encourage ADU construction to expand housing options.
Types of ADUs That Require Construction Services
| ADU Type | Description |
|---|---|
| Detached ADU | Freestanding home in the backyard or side yard |
| Attached ADU | Addition to the main home, functioning as a separate unit |
| Garage Conversion | Converts existing garage into a fully functional residence |
| Above-Garage ADU | Adds a new unit above a detached garage |
| Basement ADU | Converts a finished basement into a separate living space |
What’s Included in ADU Construction Services?
🔧 1. Feasibility Assessment
Evaluate your property’s potential for ADU development, considering zoning laws, lot size, access, and utilities.
📝 2. Design & Architecture
Architectural services ensure your ADU complies with local building codes while meeting your functional and aesthetic goals.
📑 3. Permits & Approvals
Your contractor handles submitting architectural plans, navigating zoning regulations, and securing building permits.
🏗️ 4. Construction
Full-service ADU contractors manage every aspect of the build, including:
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Foundations
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Framing
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Roofing
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Electrical and plumbing
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HVAC systems
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Interior finishes
🔌 5. Utilities Integration
Connect your ADU to water, sewer, electricity, and gas systems in compliance with code.
✅ 6. Final Inspections & Compliance
Ensure the ADU passes all required inspections and is fully certified for occupancy.
Benefits of Hiring Professional ADU Construction Services
🔨 Expert Knowledge
Experienced contractors understand complex regulations, building codes, and best practices for efficient ADU construction.
🚧 Streamlined Process
Combining design, permitting, and construction in one service reduces miscommunication and costly delays.
📅 Faster Timelines
Professionals know how to navigate city permits, site prep, and inspections swiftly.
💵 Cost Control
Upfront detailed estimates and clear contracts protect you from budget surprises.
🏠 Quality Workmanship
Licensed, bonded, and insured builders deliver higher-quality results with warranties on work and materials.
How Much Do ADU Construction Services Cost?
Costs depend on ADU size, type, materials, and local regulations.
| ADU Type | Estimated Cost Range |
|---|---|
| Garage Conversion | $40,000 – $90,000 |
| Attached ADU | $100,000 – $180,000 |
| Detached ADU | $150,000 – $300,000+ |
| Above-Garage ADU | $175,000 – $350,000+ |
Cost Factors Include:
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Site preparation (grading, foundation)
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Structural engineering
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Utility upgrades
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Interior finishes (cabinets, flooring, appliances)
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Energy efficiency compliance (Title 24, solar panels)
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Local permits and city fees
A professional ADU construction company will provide detailed, transparent pricing for your specific project.
Timeline for ADU Construction
| Stage | Estimated Duration |
|---|---|
| Feasibility & Design | 1-3 months |
| Permits & Approvals | 1-3 months |
| Construction | 4-8 months |
| Inspections & Occupancy | 1-2 months |
| Total Timeline | 6-12 months |
Timelines may vary based on property conditions, city processes, and contractor workload.
Choosing the Right ADU Construction Contractor
✅ What to Look for:
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Licensed, bonded, and insured
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Extensive ADU-specific experience
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Knowledge of local building codes
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Transparent proposals and contracts
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Positive client testimonials and project portfolio
❓ Questions to Ask Before Hiring:
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How many ADUs have you completed locally?
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Do you handle both design and construction?
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What’s your typical project timeline?
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How do you manage unexpected costs or changes?
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Can you provide recent references?
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What warranties do you offer?
Common Mistakes to Avoid
🚩 Hiring general contractors without ADU experience
🚩 Skipping feasibility studies before committing
🚩 Accepting vague, verbal quotes
🚩 Making large deposits before permits are secured
🚩 Overlooking local zoning restrictions
Real-Life Example: Successful ADU Construction
Location: Sacramento, CA
Type: 700 sq. ft. Detached ADU
Purpose: Rental income
Cost: $195,000
Timeline: 8 months
Outcome: Leased for $2,400/month within 45 days of completion.
“We hired full-service ADU construction services and it saved us so much stress. They handled everything—from design to permits to final inspection. The project was smooth, and the rental income has been consistent.”
