Permit Required? Required
Typical Fee Range $3,000–$14,200 Fees average $4,800 for units <750 sq ft and over $14,000 for larger units.
Fee Method Size-based
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What's Required in Sacramento

  • Full architectural plans and site survey are mandatory.
  • Maximum size of 1,200 square feet for detached ADUs.
  • Impact fees apply for units 750 square feet or larger.
  • Must meet California Title 24 energy efficiency standards.
  • Separate utility connection fees for water and sewer may apply.
  • Owner-occupancy is not currently required for the primary or secondary unit.

How to Get a ADU Permit in Sacramento

1

Step 1: Design Phase

Prepare custom or pre-approved ADU plans and obtain a land survey.

2

Step 2: Digital Submission

Upload plans to the Sacramento building permit portal for review.

3

Step 3: Plan Review

City reviews for building, fire, and zoning compliance.

4

Step 4: Fee Payment

Pay building permit and applicable impact fees upon approval.

5

Step 5: Construction

Inspections required for foundation, framing, and final occupancy.

Frequently Asked Questions

In Sacramento, fees for units under 750 sq ft typically average around $4,800.
Yes, most ADUs require their own panel or an upgrade to the main service.
Yes, garage conversions are permitted and typically cost less than detached builds.