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Accessory Structures in Minnesota (2026)

68 rules on the books across Minnesota, 25 cities and counties. Select a rule to read the full details.

Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions

ADU Rules

Rules for building accessory dwelling units (granny flats, in-law suites) including size limits, parking requirements, and owner-occupancy rules.

Carver County

Heavy Restrictions

Carver County's "A" District code bars separate accessory dwelling units outright. Section 152.070(C) allows guest…

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Apple Valley

Significant Restrictions

In the City of Apple Valley, Minnesota, an accessory unit dwelling (AUD) is allowed only inside or attached to a…

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Minnetonka

Significant Restrictions

In the City of Minnetonka, Minnesota, accessory dwelling units are allowed only on R-1, R-1A and R-2 properties, one…

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Olmsted County

Significant Restrictions

Olmsted County doesn't allow garage apartments or backyard ADUs by right on its farm lots; a second dwelling on an…

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Washington County

Significant Restrictions

An accessory apartment in unincorporated Washington County needs a Certificate of Compliance in the Shoreland…

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Anoka County

Some Restrictions

Anoka County's Shoreland Management Ordinance lets an unincorporated shoreland lot carry one guest cottage in addition…

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Blaine

Some Restrictions

In the City of Blaine, an attached accessory dwelling unit is a permitted use in the R-1, R-1A, R-1AA, R-1B, RE, FR and…

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Duluth

Some Restrictions

Duluth allows one accessory dwelling unit per lot under Unified Development Chapter § 50-20.5.E, capped at 800 square…

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Eagan

Some Restrictions

In the City of Eagan, an accessory dwelling unit is a permitted accessory use only on a single-family lot in the Estate…

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Lakeville

Some Restrictions

In the City of Lakeville, Minnesota, an accessory dwelling unit for housing multiple generations is allowed by…

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Minneapolis

Some Restrictions

Minneapolis allows internal, attached, and detached accessory dwelling units on single- and two-family lots through…

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Plymouth

Some Restrictions

The City of Plymouth allows one accessory dwelling unit per single-family detached lot in the FRD, RSF-1, RSF-2, RSF-3…

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Ramsey County

Some Restrictions

Ramsey County sets no ADU rule. Accessory dwelling units are municipal zoning under Minn. Stat. 462.357. St. Paul…

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Saint Paul

Some Restrictions

Saint Paul allows up to two accessory dwelling units per one-family home under Section 65.913, capping each unit at 800…

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St Louis County

Some Restrictions

An accessory dwelling in unincorporated St. Louis County always needs a land use permit, and its allowed size and…

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Stearns County

Some Restrictions

Stearns County allows one accessory dwelling unit per lot, attached or detached, under Ordinance 439 Section 6.3…

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Wright County

Some Restrictions

Minnesota has no statewide ADU mandate. In Wright County's townships the County zoning ordinance decides whether an…

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Coon Rapids

Light Restrictions

Coon Rapids permits accessory dwelling units above garages only in the Riverdale Station Transit District, an accessory…

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Shed & Carport Rules

When a storage shed or carport needs a permit, the square-footage exemption thresholds, and the setback and height limits that apply either way.

Apple Valley

Some Restrictions

In the City of Apple Valley, Minnesota, an outdoor accessory storage building over 200 square feet of enclosed area on…

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Blaine

Some Restrictions

In the City of Blaine, accessory buildings such as sheds cannot sit in a required front or side yard setback and cannot…

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Bloomington

Some Restrictions

Sheds and accessory buildings regulated under City Code §21.301.19. Buildings under 200 sq ft are exempt from building…

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Blue Earth County

Some Restrictions

In unincorporated Blue Earth County's Agriculture and Conservation districts, non-farm stand-alone accessory buildings…

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Brooklyn Park

Some Restrictions

In the City of Brooklyn Park, detached accessory structures such as sheds must sit at least five feet from interior…

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Carver County

Some Restrictions

Carver County scales shed and garage square footage to parcel size in the Agriculture District, from 1,250 square feet…

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Coon Rapids

Some Restrictions

In the City of Coon Rapids, a shed or other detached accessory structure cannot go up before the house, cannot be built…

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Duluth

Some Restrictions

In the City of Duluth, a shed or other accessory structure cannot exceed 20 feet in height, cannot cover more than 30…

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Eagan

Some Restrictions

In the City of Eagan, detached sheds and accessory buildings over 120 square feet must match the house's finish…

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Eden Prairie

Some Restrictions

A shed or other accessory structure in an Eden Prairie R1 District must sit at least 30 feet from the front line, 10…

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Lakeville

Some Restrictions

In the City of Lakeville, Minnesota, a detached shed up to 200 square feet needs only a zoning permit and a 6-foot…

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Maple Grove

Some Restrictions

Maple Grove limits accessory buildings like sheds to the rear yard, caps most detached structures at 1,000 square feet…

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Minneapolis

Some Restrictions

Detached sheds and garages in Minneapolis are capped at 13 feet tall (16 feet with matching materials), 800 square feet…

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Minnetonka

Some Restrictions

In the City of Minnetonka, Hennepin County, Minnesota, Minnetonka City Code § 300.15, subd. 12 keeps a detached…

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Olmsted County

Some Restrictions

In the townships Olmsted County zones directly, Eyota, Marion, Oronoco and Quincy, a shed or other accessory building…

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Plymouth

Some Restrictions

Sheds and other detached accessory buildings in the City of Plymouth need no building permit under 200 square feet, but…

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Ramsey County

Some Restrictions

Ramsey County has no shed ordinance. Detached accessory buildings are municipal zoning under Minn. Stat. 462.357. In…

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Saint Paul

Some Restrictions

Saint Paul caps backyard sheds and detached garages at three non-dwelling accessory buildings per lot, totaling no more…

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St Louis County

Some Restrictions

Within St. Louis County's Flood Fringe District, an accessory structure such as a shed, garage, or storage building…

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Stearns County

Some Restrictions

Stearns County exempts sheds of 150 square feet or less from a construction site permit but still holds them to…

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Washington County

Some Restrictions

Washington County requires a building permit for nearly every accessory building, and caps shed size by lot acreage…

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Woodbury

Some Restrictions

A backyard shed in Woodbury is an 'accessory building' under City Code § 24-281(a): it must sit at least five feet from…

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Scott County

Few Restrictions

A detached shed of 200 square feet or less needs no building permit anywhere in Minnesota, including Scott County…

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Wright County

Few Restrictions

A detached storage shed 200 square feet or smaller skips the building permit statewide under Minn. Rules 1300.0120…

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