Raleigh ADU Permit

What's Required in Raleigh

• Full architectural and structural plan set required.
• Must meet zoning standards for lot occupancy and setbacks.
• Maximum size capped at 1,000 square feet or 50% of the main house size.
• Requires a separate water/sewer connection or verified shared capacity.
• Must contain permanent provisions for living, sleeping, eating, and cooking.
• Owner-occupancy of the primary or secondary unit may be required.

How Much Does an ADU Permit Cost in Raleigh?

Budget $1,400–$3,000 for the Raleigh permit itself (valuation-based), issued by the Planning and 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: includes zoning, building, and impact fees for new habitable space. 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 Raleigh

Before drawing plans, check the two gates that sink most ADU projects: size and zoning. Size ceilings vary by lot and ADU type (attached, detached, or conversion), so confirm your specific configuration. Other recorded conditions: must meet zoning standards for lot occupancy and setbacks; owner-occupancy of the primary or secondary unit may be required. Setbacks, height limits, and utility connections layer on top of those rules. The Planning and 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 Raleigh

Frequently Asked Questions