Mesa vs Portland: ADU, STR & Home Business Rules Compared (2026)
Compare ADU preemption rules, short-term rental permit types, and home business permit requirements between Mesa, AZ and Portland, OR.
Side-by-Side Comparison
Mesa vs Portland
| MesaAZ | PortlandOR | |
|---|---|---|
| ADUs Allowed? | Yes — one attached ADU and one detached ADU are permitted per lot in Agricultural, Residential, Commercial and Mixed Use, and Downtown districts (Mesa City Code Chapter 11) | Yes — cities over 2,500 population must allow at least one ADU per detached single-family dwelling within the urban growth boundary (Oregon SB 1051/HB 2001, ORS 197A.425(1)(a)) |
| Owner Occupancy Required? | Not independently verified — Mesa's ADU ordinance does not codify an owner-occupancy requirement, and Arizona HB 2720 (ARS §9-461.18(B)(2)) restricts certain occupancy-based conditions statewide; see official source for Mesa's current rule (Mesa City Code Chapter 11) | No — Oregon state law bars local governments from imposing an owner-occupancy requirement on either the primary or accessory structure (Oregon SB 1051/HB 2001, ORS 197A.425(1)(b)(B)) |
| Parking Required? | No — no additional parking spaces are required for an ADU under current Mesa ordinance, following Arizona's 2024 preemption (HB 2720) that removed local parking authority over ADUs (Mesa City Code Chapter 11, §11-31-3(G)) | No — Oregon state law directly bars local governments from requiring additional off-street parking for an ADU (Oregon SB 1051/HB 2001, ORS 197A.425(1)(b)(B)) |
| STR Allowed? | Yes — regulated as a licensed short-term rental use (Mesa City Code Chapter 5-15) | Yes — accessory short-term rental regulations apply in all zones (Portland City Code Title 33, §33.207.030) |
| Registration Required? | Yes — a short-term rental license is required (Mesa City Code Chapter 5-15) | Yes — a Type A accessory short-term rental permit is required (Portland City Code Title 33, §33.207.040.A.2) |
| Registration Type | Short-Term Rental License (Mesa City Code Chapter 5-15) | Type A accessory short-term rental permit (Portland City Code Title 33, §33.207.040.A.2) |
| Home Business Allowed? | Yes — home occupations are permitted as an accessory use in Residential, Commercial, Mixed-use, and Downtown districts (Mesa Zoning Ordinance Chapter 87) | Yes — uses meeting the standards of Portland's home-occupation chapter are allowed by right unless specifically listed as prohibited (Portland City Code Title 33, §33.203.030.A) |
| City Permit Required? | No — a base home occupation requires no separate permit; a Special Use Permit applies only if non-resident employees are involved in the AG, RS-90, or RS-43 districts (Mesa Zoning Ordinance Chapter 87) | Yes — Type B home occupations must obtain a permit from Portland Permitting & Development before starting (Portland City Code Title 33, §33.203.060.A) |
Key Differences
Mesa and Portland reach nearly identical outcomes on ADUs and parking, but for different legal reasons. Both cities allow at least one ADU by right and require no additional off-street parking — Mesa's outcome follows from Arizona's 2024 statewide ADU preemption (HB 2720, ARS §9-461.18(B)(2)), which stripped cities of the authority to impose parking or occupancy conditions, while Portland's outcome comes directly from Oregon's own ADU preemption statute (SB 1051/HB 2001, ORS 197A.425(1)(b)(B)), which bars owner-occupancy and parking requirements outright. Mesa's ADU owner-occupancy posture is not independently verified in this corpus — the local ordinance is silent and the statewide preemption's exact reach on occupancy is not confirmed here; see official source for Mesa's current rule. Short-term rentals and home businesses are allowed in both cities, but the paperwork differs. Mesa issues a dedicated Short-Term Rental License (Mesa City Code Chapter 5-15), while Portland requires a Type A accessory short-term rental permit (Portland City Code Title 33 §33.207.040.A.2). Home business permitting is the sharpest contrast: Mesa lets a qualifying home occupation operate with no separate permit in most zones (Mesa Zoning Ordinance Chapter 87), while Portland requires Type B home occupations to obtain a permit from Portland Permitting & Development before starting (Portland City Code Title 33 §33.203.060.A).
Cost Comparison
Mesa's ADU building permit fees run roughly $2,000–$9,000, including the city's water, sewer, and transportation development fees, with a typical 3–5 week review timeline. Portland does not publish a fixed ADU permit fee range in the city's cached fee schedule, but System Development Charges for transportation, parks, and utilities typically add $10,000–$20,000, and pre-approved standard plan sets from Portland Bureau of Development Services can reduce review time. Both figures are drawn from each city's cached fee/process notes and should be confirmed directly with Mesa Building Safety or Portland Permitting & Development before budgeting.
Our Verdict
Mesa and Portland land on nearly the same ADU/parking outcome through very different statutory paths — Arizona's HB 2720 preemption for Mesa, Oregon's SB 1051/HB 2001 preemption for Portland — so an ADU builder in either city avoids added parking requirements. The bigger practical difference is home-business paperwork: Mesa allows a qualifying home occupation with no separate permit, while Portland requires certain home occupations to secure a permit before starting. Short-term rental operators face a registration step in both cities, just under different names (Mesa's Short-Term Rental License vs Portland's Type A accessory short-term rental permit). For an owner who wants the lightest home-business process, Mesa is the more permissive of the two; for ADU parking certainty, both cities are equally favorable thanks to their respective state preemption laws.
Explore Each City
Frequently Asked Questions
Do Mesa and Portland both require extra parking for an ADU?
No — neither city requires additional off-street parking for an ADU, though for different reasons. Mesa's outcome follows from Arizona's HB 2720 preemption (ARS §9-461.18(B)(2)); Portland's follows from Oregon's own ADU preemption statute barring parking requirements (ORS 197A.425(1)(b)(B)).
Do I need a permit to run a home business in Portland?
It depends on the type. Uses meeting Portland's home-occupation standards are generally allowed by right, but Type B home occupations must obtain a permit from Portland Permitting & Development before starting (Portland City Code Title 33 §33.203.060.A). Mesa's base home occupation requires no separate permit in most zones (Mesa Zoning Ordinance Chapter 87).
What's the difference between Mesa's and Portland's short-term rental registration?
Mesa issues a dedicated Short-Term Rental License (Mesa City Code Chapter 5-15); Portland requires a Type A accessory short-term rental permit (Portland City Code Title 33 §33.207.040.A.2). Both are required before operating.
Is Mesa's ADU owner-occupancy rule confirmed the same as Portland's?
Not confirmed for Mesa — the city's ADU ordinance does not codify an owner-occupancy requirement, and the exact reach of Arizona's statewide preemption on occupancy conditions is not independently verified here; check with Mesa Planning for the current rule. Portland's rule is confirmed: Oregon state law bars local governments from imposing an owner-occupancy requirement (ORS 197A.425(1)(b)(B)).
Source: PropertyZoned Editorial Research. Last verified July 15, 2026.