Maricopa County, Arizona
Maricopa County Residential Design & Permit Information
This page covers residential permitting and design requirements for properties located in unincorporated areas of Maricopa County.
How This Page Helps
A practical starting point for unincorporated Maricopa County projects
If a property is not within a city jurisdiction, Maricopa County handles permitting and plan review. This process differs from city jurisdictions and requires understanding county-specific requirements.
Common Project Types
- Custom homes in unincorporated areas
- Additions and remodels
- Detached structures and RV garages
- Rural and large-lot development
- As-built documentation
Before You Start
Information that helps move a project forward
It is critical to confirm whether the property is within city limits or unincorporated county. This determines which jurisdiction governs permitting.
- Confirm whether the property is in a city or unincorporated county
- Project scope and site constraints
- Drainage and site condition awareness
- Any available existing plans or field documentation
Current Code Adoption
Current Maricopa County code references
Maricopa County follows the 2021 code cycle, including the 2021 IRC, 2021 IBC, 2021 IMC, 2021 IPC, 2021 IECC, and the 2020 NEC, with county amendments.
- 2021 IRC
- 2021 IBC
- 2021 IMC
- 2021 IPC
- 2021 IECC
- 2020 NEC
- County amendments apply
Process Overview
How unincorporated Maricopa County residential projects typically move through review
Maricopa County uses a digital plan review process. Projects are reviewed for building code compliance, zoning, drainage, and site conditions.
Online Portal
Maricopa County uses its online permitting system for plan submittals, permit tracking, and inspections.
Related Services
Services that often connect to Maricopa County projects
County projects often begin either with a new design path, such as a custom home, detached structure, or rural lot development, or with existing-condition documentation where as-built drawings help clarify scope before county review.
Contact Residential Design
Planning a Project in Maricopa County?
Tell us about the property, the project type, and whether it is within city limits or unincorporated county. Whether you are planning a custom home, remodel, addition, detached structure, or need existing-condition drawings, starting with accurate jurisdiction information helps avoid major delays and surprises.