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 Much Does an ADU Permit Cost in Sacramento?

Budget $3,000–$14,200 for the Sacramento permit itself (size-based), issued by the Community Development Department — but treat that as the entry fee, not the total. ADUs are full dwelling units, so the permit stack usually includes building, electrical, plumbing, and mechanical trade permits, plus plan review. One local note: fees average $4,800 for units <750 sq ft and over $14,000 for larger units. Get an itemized fee estimate from the department before finalizing your budget; the spread between a simple conversion and a new detached build is wide.

ADU Size Limits and Zoning Rules in Sacramento

Before drawing plans, check the two gates that sink most ADU projects: size and zoning. On record here, the size ceiling is 1,200 square feet for detached ADUs. Other recorded conditions: owner-occupancy is not currently required for the primary or secondary unit. Setbacks, height limits, and utility connections layer on top of those rules. The Community Development Department can confirm what your specific lot allows — worth doing before you pay for architectural drawings rather than after.

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.
On record, the ceiling is 1,200 square feet — with the exact limit depending on ADU type and lot. Confirm your configuration with the Community Development Department.