Accessory Dwelling Unit / Detached Guest House / Casita Permit in Goodyear, Arizona

Goodyear requires an accessory dwelling unit / detached guest house / casita permit for: A detached guest house, casita, or accessory dwelling unit requires a standard building permit under the 'Detached Casita or Guest House' Residential Fees category; plan review is billed at 65% of the Table 1-A permit fee, plus the Table 1-A permit fee itself, an $86 Planning and Zoning fee, and a $102 application fee; The City's SMART program allows a design professional to pre-submit a non-site-specific ADU plan set (Class 4: SMART41 at 200 sq ft, SMART42 at 600 sq ft, SMART43 at 1,000 sq ft, each requiring at least 3 elevation options) for City pre-review and listing in the SMART Pre-approved Plan Library; Using a posted SMART plan still requires a site-specific permit application (site plan, grading info, utility connection details, energy compliance documentation, geotechnical report) — a pre-approved plan is not itself a construction permit; Property owners using a SMART plan must independently obtain usage rights from the plan's author; the City does not grant or broker usage rights; As of this review (2026-07-03), all SMART Class 1-4 plan types (including the ADU Class 4 track) show status 'Seeking Submittals' — no plans had yet been approved/posted, so the SMART pre-approved pathway was not yet operational for ADUs; the standard Detached Casita/Guest House building permit route remains the only verified, currently-usable path. If your project isn't listed, confirm with City of Goodyear Development Services — Building Safety Division at 623-932-3910 before starting work.

In Goodyear, the published Detached Casita or Guest House (plan review) is: 65% of Permit Fee, plus Table 1-A permit fee, $86 Planning and Zoning, $102 Application. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Goodyear's published plan-review target for an accessory dwelling unit / detached guest house / casita permit is 5–15 business days.

You'll need: Building Permit Application (Detached Casita/Guest House). Depending on your project, Goodyear may also ask for: SMART Pre-Application Meeting Request. See the required-documents checklist on this page for details on each.

Goodyear requires 3 inspection(s) for an accessory dwelling unit / detached guest house / casita permit, in order: Foundation/Footing, Framing, Final. Schedule each through City of Goodyear Development Services — Building Safety Division (623-932-3910).

Apply through City of Goodyear Development Services — Building Safety Division at 1900 N. Civic Square, 2nd Floor, Goodyear, AZ 85395. Phone: 623-932-3910, email: buildingsafety@goodyearaz.gov. Office hours: Development Center, 1900 N. Civic Square, Goodyear, AZ 85395; general Development Services line 623-932-3910; development counter/fee questions 623-932-3004 option 2; project fee estimate requests developmentcounter@goodyearaz.gov. Official information: https://www.goodyearaz.gov/government/departments/engineering-development-services/development-services/building-safety-division/currently-adopted-building-codes.

Goodyear, Arizona has adopted: Arizona has no mandatory statewide building code for general construction — the state legislature does not adopt a single edition binding all municipalities; each Arizona city/town or county adopts and amends its own building code by ordinance (contrast with counties, which are directed by A.R.S. Title 11 to adopt at least the most recent edition or the immediately preceding edition of the ICC codes for unincorporated areas). The City of Goodyear operates its own Development Services / Building Safety Division and administers its own adopted codes and permitting program within city limits — it does not defer to Maricopa County. Source: City of Goodyear Building Safety Division, Currently Adopted Building Codes page.; 2018 International Building Code (IBC) — City of Goodyear, with local amendments, effective November 27, 2019. Source: City of Goodyear Currently Adopted Building Codes page; 2018 International Residential Code for One- and Two-Family Dwellings (IRC) — City of Goodyear, with local amendments, effective November 27, 2019, plus City of Goodyear Residential Design Standards (Table 301.2(1)); 2018 International Mechanical Code (IMC) — City of Goodyear, with local amendments, effective November 27, 2019; 2018 International Plumbing Code (IPC) — City of Goodyear, with local amendments, effective November 27, 2019 (Arizona municipalities generally use the IPC rather than the Uniform Plumbing Code); 2018 International Fuel Gas Code (IFGC) — City of Goodyear, with local amendments, effective November 27, 2019; 2018 International Energy Conservation Code (IECC) — City of Goodyear, with local amendments, effective November 27, 2019; 2018 International Existing Building Code (IEBC) — City of Goodyear, with local amendments, effective November 27, 2019; 2018 International Property Maintenance Code (IPMC) — City of Goodyear, with local amendments, effective November 27, 2019; 2018 International Fire Code (IFC) — City of Goodyear, with local amendments, effective November 27, 2019; City Code Fire Code amendments codified at Section 5-2-1 (International Fire Code Adopted); 2017 National Electrical Code (NEC) — City of Goodyear (Goodyear retains the 2017 NEC rather than a later edition as of this review); ICC A117.1-2009 Accessible and Usable Buildings and Facilities — American National Standards Institute / International Code Council; 2010 ADA Standards for Accessible Design — U.S. Department of Justice; NFPA 99 (2018 Edition), Standard for Health Care Facilities Code — National Fire Protection Association; Technical Building Codes amendments codified at City Code Section 9-1-1 ('Adoption by reference'). Source: City of Goodyear Currently Adopted Building Codes page (Building Safety Division). Local amendments apply — see the Goodyear overview page for the full list.

Goodyear does not have a permit type called 'ADU permit' distinct from its standard building permit — a detached guest house, casita, or ADU is permitted as a 'Detached Casita or Guest House' under the standard Residential Building Permit fee and review-time schedule. Separately, the City has established SMART (Streamlined Municipal Approved Residential Types), a pre-approved plan program under A.R.S. 9-461.20 and SB 1529 (2025) with a dedicated Class 4 ADU track (200/600/1,000 sq ft), but as of this review no ADU plans had yet been approved and posted to the SMART library — the class was still listed 'Seeking Submittals.'