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Toledo, OH Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

ADU rules in Toledo, OH, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

ADUs per lot: One accessory dwelling unit maximum
Footprint cap: 60% of primary dwelling's footprint
Entrance: Separate exterior entrance required
Parking: Exempt from off-street parking requirement
Prohibited types: No mobile homes, RVs, or travel trailers
Effective ordinance: Ord. 440-25, passed 9-23-25

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Ohio under recent ADU streamlining laws. The Toledo, OH rules below cover local size, height, and setback requirements.

Summary

Toledo allows one accessory dwelling unit per single-family lot, attached or detached, capped at 60% of the primary home's footprint, with a separate entrance and no mobile homes or trailers permitted as ADUs.

1105.0207 Accessory Dwelling Units. A. General. Where permitted, an accessory dwelling unit may be established within the existing single-family building or as a detached structure on the same lot as a single-family dwelling. No more than one (1) accessory dwelling unit is permitted per lot. ... E. Lot Coverage. The footprint of the accessory dwelling unit shall not occupy more than 60% of the footprint of the primary single-family dwelling. ... L. Prohibition. Mobile homes, recreational vehicles, travel trailers, or other wheeled and transportable structures may not be used as accessory dwelling units. (Ord. 440-25. Passed 9-23-25.)

Source: Toledo Zoning CodeView official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-105: Complete to June 30, 2026).

Full Breakdown

0207 by Ordinance 440-25, passed September 23, 2025. Under subsection A, an ADU may be established within an existing single-family building or as a detached structure on the same lot, and no more than one ADU is permitted per lot. Subsection C requires each ADU to have a separate exterior entrance independent of the entrance to the principal dwelling. 0204(A). 0201, and an ADU added onto the house must meet the principal-dwelling setbacks for its zoning district. 0202, or the height of the existing principal structure for detached units. 0300, and subsection L bars mobile homes, recreational vehicles, travel trailers, or other wheeled structures from serving as ADUs.

Violations & Fines

ADUs are subject to the Zoning Code enforcement scheme in Chapter 1115. Establishing or altering an ADU inconsistent with Section 1105.0207 is a Zoning Code violation under Section 1115.0201/1115.0205, carrying escalating citation fines of $75, $150, $300 and $600 for successive offenses under Section 1115.0507(C), plus possible stop-work orders and, for continuing violations, a separate penalty for each day the noncompliant unit remains.

Frequently Asked Questions

How many accessory dwelling units can I build on one lot in Toledo?

Only one. Toledo Zoning Code Section 1105.0207(A) permits no more than one accessory dwelling unit per lot, whether it is built inside the existing house or as a detached structure.

How big can a Toledo ADU be compared to the main house?

Its footprint cannot exceed 60 percent of the primary single-family dwelling's footprint under Section 1105.0207(E), and it still counts toward the separate 30 percent rear-yard coverage cap for accessory buildings.

Can I put a travel trailer on my lot as an ADU?

No. Section 1105.0207(L) expressly prohibits mobile homes, recreational vehicles, travel trailers, or other wheeled and transportable structures from being used as accessory dwelling units.

Sources & Official References

[1]Toledo Municipal Code § 1105.0207, Accessory Dwelling Units

Other rules in Toledo

Shed & Carport RulesSome Restrictions Parking Rules: RV & Boat ParkingSome Restrictions ADU Owner OccupancySome Restrictions Parking Rules: Towing & Impound RightsSignificant Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: Loading ZonesSome Restrictions Parking Rules: EV ChargingSome Restrictions Fence Regulations: Fence Permit RequirementsSome Restrictions

All Toledo rules

How Toledo compares: Easiest Cities to Build an ADU·Compare Toledo to another location·View the Ohio accessory structures overview

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