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Permitting & Regulations
in Santa Clara County

Your Guide to a Smooth Construction Process

Navigating the Santa Clara County permitting process can be complex, but Darco Construction is here to help. Whether you're planning a custom home, ADU, remodel, or commercial project, understanding local regulations is crucial to keeping your project on track.

This guide covers everything from permit applications and zoning laws to inspection checklists and compliance requirements—ensuring you avoid costly delays and legal issues.

Santa Clara County Building Permit Process

Most residential and commercial construction projects require a building permit. The general process follows these steps:

Step 1: Determine if a Permit is Required
You will need a permit for:

  • New construction (custom homes, commercial buildings, ADUs)

  • Major renovations and additions

  • Structural modifications

  • Electrical, plumbing, and mechanical upgrades

  • Grading, excavation, and demolition

🔗 Official Santa Clara County Permit Requirements:
Click here to check permit requirements

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Step 2: Submit Permit Applications
Permit applications must include:

  • Project plans (drawn to scale)

  • Engineering calculations (if required)

  • Energy efficiency compliance documents

  • Contractor and ownership details

🔗 Submit applications via the Santa Clara County Public Portal:
Apply for a Building Permit

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Step 3: Plan Review & Approval
Once submitted, county officials review plans for compliance with California Building Codes (CBC) and local zoning laws. Review times vary based on project complexity.

Step 4: Inspections & Final Approval
Inspections ensure construction meets safety and quality standards. The county will perform multiple inspections before issuing a Certificate of Occupancy.

Santa Clara County ADU Regulations

Building an Accessory Dwelling Unit (ADU) in Santa Clara County is an excellent way to increase property

value. However, there are specific rules you must follow:

 

🏡 Size Limits

  • Detached ADUs: Up to 1,200 sq. ft.

  • Attached ADUs: Cannot exceed 50% of the main home’s size

 

🚗 Parking Requirements

  • No additional parking required if the ADU is within half a mile of public transit

  • One parking spot per unit may be required otherwise

 

📍 Setback Rules

  • Rear and side setbacks: Minimum 4 feet

  • Must comply with fire safety and utility access regulations

 

🔗 Get complete ADU requirements from Santa Clara County:
Santa Clara County ADU Guidelines

Santa Clara County Construction Inspections & Compliance

To pass inspections, projects must comply with local building codes. Santa Clara County typically requires:

  • Foundation & Framing Inspections – Ensure proper structural support

  • Electrical & Plumbing Inspections – Verify safety and compliance

  • Final Walkthrough – Confirms all work meets regulatory standards

🔗 Schedule an inspection through Santa Clara County’s Public Portal:
Book an Inspection

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How Darco Construction Simplifies Permitting & Compliance

With extensive experience in Santa Clara County, Darco Construction handles the entire permitting and regulatory process for you. Our team ensures:

  • Fast-track approvals by submitting complete, compliant applications

  • Proactive issue resolution to prevent costly project delays

  • Expert ADU & zoning compliance guidance tailored to your property

  • Seamless coordination with county officials, inspectors, and engineers

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Ready to start your project?


Contact us today to ensure a smooth permitting process for your home or commercial build.

CONTACT FORM

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