Permitting is the part of ADU construction that most homeowners dread — and for good reason. It can be slow, complex, and full of bureaucratic hurdles. But it doesn't have to be painful if you know what to expect. After 30 years of pulling permits in Santa Cruz County, we know this process inside and out.

Overview: What Permits Does an ADU Need?

Every ADU in California requires a building permit. Depending on your project, you may also need:

  • Structural/engineering permit
  • Electrical permit
  • Plumbing permit
  • Mechanical (HVAC) permit
  • Grading permit (if site work required)

We pull all of these on your behalf. You don't deal with city hall — we do.

The Permit Timeline

California Law: 60-Day Guarantee

Under state ADU law (AB 68, SB 13), cities and counties must approve or deny a complete ADU application within 60 days. This is a major improvement from the years when permits could take 6+ months.

Step 1: Pre-Application (Week 1–2)

Before submitting, we do a thorough review of your property: zoning, setbacks, utility connections, and any special requirements. Getting this right upfront prevents rejections later.

Step 2: Plan Preparation (Week 2–6)

Our architectural team prepares a full set of construction documents — site plan, floor plans, elevations, electrical plans, plumbing plans, and structural drawings. Quality plans mean faster permit approval.

Step 3: Permit Submission (Week 6–8)

We submit to the relevant jurisdiction (City of Santa Cruz, County of Santa Cruz, or others depending on your location). Most jurisdictions now accept online submissions.

Step 4: Plan Check Review (Week 8–14)

The city reviews your plans and may issue correction comments. We handle all responses and resubmissions — typically one or two rounds. California law requires approval within 60 days of a complete submission.

Step 5: Permit Issuance (Week 14–16)

Once approved, we pay the permit fees and pull the permits. Construction can begin.

Permit Fees in Santa Cruz County

Permit fees vary by jurisdiction and project size. Here's a general range:

  • City of Santa Cruz: $10,000–$18,000 for a typical ADU
  • County of Santa Cruz (unincorporated): $8,000–$15,000
  • Capitola, Watsonville: $7,000–$13,000

Note: Under state law, jurisdictions cannot charge impact fees on ADUs under 750 sq ft. This was a significant reform that saved homeowners thousands.

Common Reasons for Permit Delays

  • Incomplete plans (missing dimensions, unclear details)
  • Setback violations (units too close to property lines)
  • Utility capacity issues
  • HOA conflicts (if applicable)
  • Environmental review requirements
"We've never had a project die in permit review — but we've taken over projects from other contractors where incomplete plans caused 3–4 month delays. The quality of your plans determines the speed of your permit."

Ready to start the permit process? Contact us for a free assessment — we'll tell you exactly what to expect for your specific property.