4.80 - Building Type Standards

This section sets forth the standards applicable to the development of each building type. These standards

supplement the standards for each zone that the building types are allowed within. These standards are intended

to ensure development that reinforces the highly-valued existing character and scale of Petaluma's neighborhoods

and downtown.

A. The standards established in this section shall apply to all proposed development within the transect zones,

and shall be considered in combination with the standards found within this Code.

B. The standards set forth in this section may be used in non-transect zones as guidelines.

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A. This section provides an overview of the allowed building types. The names of the building types are not

intended to limit uses within a building type. For example, a single-unit house may have non-residential uses

within it, such as a restaurant or oVce.

B. The Lot Size Standards for each building type designate the range of lot sizes that the given building type is

allowed to be built on. If the lot is smaller or larger than the allowed lot size, a diWerent building type must be

selected.

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Sec. 4 Urban Standards | Petaluma SmartCode Page 56 of 139

T6 T6 T6

T5 T5 T5
T4 T4 T4 allowed
not Zones T3 T3 T3
T2 T2 T2 T#

T1 T1 T1 Transect

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T6 T6 T6

T5 T5 T5
T4 T4 T4 allowed
not Zones T3 T3 T3
T2 T2 T2 T#

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T1 T1 T1 Transect

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T6 T6 T6

T5 T5 T5
T4 T4 T4 allowed
not Zones T3 T3 T3
T2 T2 T2 T#

T1 T1 T1 Transect

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Type Key
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T6 T6 T6

T5 T5 T5
T4 T4 T4 allowed
not Zones T3 T3 T3
T2 T2 T2 T#

T1 T1 T1 Transect

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Type Key
Building

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allowed
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Type Key
Building

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One-and-a-half-story carriage house connected to main house by a breezeway

Two and Two-and-a-half-story Carriage houses lining an alley

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One-and-a-half-story carriage house with an internal stair

A. Description. Carriage House: This Building Type is a secondary structure typically located at the rear of a lot.

This structure typically provides either a small residential unit, home oVce space, or other small commercial or

service use that may be above a garage or at ground level. This Building Type is important for providing aWordable

housing opportunities and incubating small businesses within walkable neighborhoods.

T1 T2 T3 T4 T5 T6

B. Lot.

Allowed on lots when accompanying the following building types: Single-Unit Houses, Duplexes, Townhouses,

Mansion Apartments.

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The Carriage House Building Type is the only detached accessory dwelling unit (ADU) allowed in transect

zones.

C. Number of Units.

Units 1 max.

D. Building Size and Massing.

Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 36' max. ?

Per Urban Standards 30' max. ?
(Table 4.10) based on

Transect Zone

Per Urban Standards 10' min.1 ?
(Table 4.10) based on

Transect Zone

1Carriage house may be connected to the main

building by uninhabitable space such as a

breezeway

Height

Carriage houses shall not be taller or have a larger

footprint than the main building on the lot.

E. Allowed Frontages.

Stoop

Carriage houses are not required to have a Frontage Type.

F. Pedestrian Access.

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Main Entrance Location Side Street, Alley, or

internal to the lot

The main entrance may not be through a garage.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

All parking spaces provided shall be separate from the principal building and may be enclosed, covered or

open.

H. Private Open Space.

The Private Open Space requirements for the lot shall be determined by the principal building on the lot. No

additional Private Open Space is required for a Carriage House.

Two-story village house

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Two-story estate house with a wrap around porch.

Two-and-a-half-story estate house.

A. Description. The Detached House: Estate Building Type is a large detached structure on a large lot that

incorporates one unit. It is typically located within a primarily single-family residential neighborhood in a more

rural setting. If located within a walkable neighborhood, this Building Type is typically located at the edge of the

neighborhood, providing a transition to the more rural areas.

T1 T2 T3 T4 T5 T6

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B. Lot.

Lot Size

Width1 75' min. ?

Depth1 100' min. ?

1Smaller lot size permitted only if building type is

already existing on lot at time of code adoption, 6/

17/2013.

C. Number of Units.

Units 1 max.

D. Building Size and Massing.

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Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 48' max. ?

Secondary Wing(s)

Width 36' max. ?

Depth 30' max. ?

2Width and depth regulations do not apply to ?
secondary wings located behind the main

body.

Accessory Structure(s)

Width2 36' max. ?

Depth2 30' max. ?

E. Allowed Frontages.

Common Yard Porch, Projecting

Porch, Engaged Stoop

F. Pedestrian Access.

Main Entrance Front ? Location

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

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Parking spaces may be enclosed, covered or open.

H. Private Open Space.

Width 30' min. ?

Depth 30' min. ?

Area 1,000 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

A street of front-loaded village houses in Petaluma.

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Two-story village house with an engaged porch.

Two-story village house on a corner lot with a wrap-around porch.

A. Description. The Detached House: Village Building Type is a medium-sized detached structure on a medium-

sized lot that incorporates one unit. It is typically located within a primarily single-family residential neighborhood

in a walkable urban setting, potentially near a neighborhood main street.

T1 T2 T3 T4 T5 T6

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B. Lot.

Lot Size

Width 50' min.; 75' max. ?

Depth 75' min. ?

Area1 5,000 sf min.

1Smaller lot size permitted only if building type is

already existing on lot at time of code adoption, 6/

17/2013.

C. Number of Units.

Units 1 max.

D. Building Size and Massing.

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Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 48' max. ?

Secondary Wing(s)

Width 30' max. ?

Depth 30' max. ?

Accessory Structure(s)

Width 24' max. ?

Depth 30' max. ?

E. Allowed Frontages.

Porch, Engaged

Porch, Projecting

F. Pedestrian Access.

Main Entrance Front ? Location

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

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Width 20' min. ?

Depth 20' min. ?

Area 500 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

Small one-story cottage house.

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Newly constructed two-story cottage houses

One-and-a-half story corner lot cottage house in Petaluma.

A. Description. The Detached House: Cottage Building Type is a small detached structure on a small lot that

incorporates one unit. It is typically located within a primarily single-family neighborhood in a walkable urban

setting, potentially near a neighborhood main street.

T1 T2 T3 T4 T5 T6

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B. Lot.

Lot Size

Width 30' min.; 50' max. ?

Depth 50' min.; 150' max. ?

Area1 2,500 sf min.

1Smaller lot size permitted only if building type is

already existing on lot at time of code adoption, 6/

17/2013.

C. Number of Units.

Units 1 max.

D. Building Size and Massing.

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Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 36' max. ?

Secondary Wing(s)

Width 30' max. ?

Depth 30' max. ?

Accessory Structure

Width 24' max. ?

Depth 30' max. ?

Only one accessory structure is allowed per lot.

E. Allowed Frontages.

Porch, Projecting

Stoop

F. Pedestrian Access.

Main Entrance Front ? Location

G. Vehicle Access and Parking.

Parking shall be accessed from a side street or alley.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

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Width 15' min. ?

Depth 15' min. ?

Area 300 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

Small one-story cottage house.

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Newly constructed two-story cottage houses

One-and-a-half story corner lot cottage house in Petaluma.

A. Description. The Detached House: Cottage Building Type is a small detached structure on a small lot that

incorporates one unit. It is typically located within a primarily single-family neighborhood in a walkable urban

setting, potentially near a neighborhood main street.

T1 T2 T3 T4 T5 T6

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B. Lot.

Lot Size

Width 75' min.; 150' max. ?

Depth 100' min.; 150' max. ?

C. Number of Units.

Units 3 min.; 9 max.

D. Building Size and Massing.

Height

Height 1 ½ Stories max.

Main Body

Width 32' max. ?

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Main Body

Depth 24' max. ?

Secondary Wing(s)

Width 24' max. ?

Depth 12' max. ?

Accessory Structure

Width 24' max.

Depth 24' max.

E. Allowed Frontages.

Porch, Projecting

Stoop

F. Pedestrian Access.

Main Entrance Front ? Location

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

Width 20' min. ?

Depth 20' min. ?

Area 400 sf min.

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Required street setbacks and driveways shall not be included in the private open space area calculation.

A front-back duplex with each unit having its own porch

A stacked duplex with a shared porch

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A one and a half-story side-by-side duplex

A. Description. Duplex: This Building Type is a small to medium-sized structure that consists of two side-by-side

or stacked dwelling units, both facing the street, and sharing one common party wall. This Type has the

appearance of a medium to large single-residence home and is appropriately scaled to Tt within primarily single-

residence neighborhoods or medium density neighborhoods.

T1 T2 T3 T4 T5 T6

B. Lot.

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Lot Size

Width2 50' min.; 75' max. ?

Depth 100' min.; 150' max. ?

2Total width of lot(s) if there is a shared Property

Line

C. Number of Units.

Units 2 max.

D. Building Size and Massing.

Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 48' max. ?

Secondary Wing(s)

Width 30' max. ?

Accessory Structure

Width 24' max. ?

Individual unit 24' max.

ownership

Shared between 48' max.

units

Depth 30' max. ?

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E. Allowed Frontages.

Porch, Engaged Stoop

Porch, Projecting

F. Pedestrian Access.

Main Entrance Front3 ? Location

Each unit shall have an individual entry facing the

street on or no more than 10' behind the front

facade.

3On corner lots, each unit shall front a diWerent

street.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

Width 15' per unit, min. ?

Depth 15' per unit, min. ?

Area 300 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

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DiWerent materials window treatments applied to a simple facade plan articulate the individual townhouse units.

A series of townhouse units lining a small open space.

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Stacked units in a townhouse form.

A. Description. Townhouse: This Building Type is a small to medium-sized attached structure that shares a

common party wall with another of the same type . This Type is typically located within medium density

neighborhoods or in a location that transitions from a primarily single-residence neighborhood into a

neighborhood main street.

Syn: Rowhouse

T1 T2 T3 T4 T5 T6

B. Lot.

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Lot Size

Width 18' min. per unit ?

Depth 80' min. ?

C. Number of Units.

Units 3 min.; 8 max.1

1
Units stacked in a townhouse form count as one

unit when calculating the number of units for this

regulation

D. Building Size and Massing.

Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 18' min.; 36' max. ?

Secondary Wing(s)

The footprint area of the Secondary Wing(s) may

not exceed the footprint area of the Main Body.

Accessory Structure(s)

Width 24' max. ?

Depth 30' max. ?

The footprint area of an Accessory Structure may

not exceed the footprint area of the Main Body.

E. Allowed Frontages.

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Porch Dooryard

Stoop

F. Pedestrian Access.

Main Entrance Front ? Location

Each unit shall have an individual entry facing a

street.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

When accessed from the front, a single shared drive shall be used.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

Width 8' min. ?

Depth 8' min. ?

Area 100 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

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A mansion apartment with the scale and character of the surrounding single-residence houses

A mansion apartment with a single entry accessing all units

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A mansion apartment with multiple entries along the front

A. Description. Mansion Apartment: This Building Type is a medium structure that consists of three to six side-

by-side and/or stacked dwelling units, typically with one shared entry or individual entries along the front. This

type has the appearance of a medium sized residence home and is appropriately scaled to Tt in sparingly within

primarily single-residence neighborhoods or into medium density neighborhoods.

T1 T2 T3 T4 T5 T6

B. Lot.

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Lot Size

Width 50' min.; 100' max. ?

Depth 100' min.; 150' max. ?

C. Number of Units.

Units 3 min.; 6 max.

D. Building Size and Massing.

Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 48' max. ?

Depth 36' max. ?

Secondary Wing(s)

Width 30' max. ?

Depth 30' max. ?

Accessory Structure(s)

Width 48' max. ?

Depth 30' max. ?

The footprint area of an Accessory Structure may

not exceed the footprint area of the Main Body.

E. Allowed Frontages.

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Porch, Engaged Stoop

Porch, Projecting Dooryard

F. Pedestrian Access.

Main Entrance Front ? Location

Each unit may have an individual entry.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

Width 8' min. ?

Depth 8' min. ?

Area 100 sf min.

Required street setbacks and driveways shall not be included in the private open space area calculation.

Required private open space must be located behind the main body of the house.

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An apartment house with a small forecourt

A corner lot apartment house.

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A newly constructed apartment house.

A. Description. Apartment House: This Building Type is a medium-to-large-sized structure that consists of seven

to 12 side-by-side and/or stacked dwelling units, typically with one shared entry. This Type is appropriately scaled

to Tt in within medium density neighborhoods or sparingly within large lot predominantly single-residence

neighborhoods.

T1 T2 T3 T4 T5 T6

B. Lot.

Lot Size

Width 75' min.; 150' max. ?

Depth 100' min.; 150' max. ?

C. Number of Units.

Units 7 min.; 12 max.

D. Building Size and Massing.

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Height

Per Urban Standards (Table 4.10) based on

Transect Zone

Main Body

Width 60' max. ?

Depth 50' max. ?

Secondary Wing(s)

Width 48' max. ?

Depth 36' max. ?

Accessory Structure(s)

Width 48' max.

Depth 30' max.

The footprint area of an Accessory Structure may

not exceed the footprint area of the Main Body.

E. Allowed Frontages.

Porch, Projecting Forecourt

Stoop Dooryard

F. Pedestrian Access.

Main Entrance Front ? Location

Units located in the Main Body shall be accessed

by a common entry along the front.

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On corner lots, units in a secondary wing may

front the side street.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

No private open space requirement.

A courtyard building with all units accessed form a central courtyard which provides communal open space

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A courtyard deTned by two and three story buildings.

Courtyard with elevated stoops for privacy

A. Description. Courtyard Building: This Building Type is a grouping of small structures or an individual medium-

to-large-sized structure that is oriented around a shared courtyard or series of courtyards. The units consists of

multiple side-by-side and/or stacked dwelling units primarily accessed directly from a courtyard. This Type is

primarily applicable for medium-density neighborhoods, but is also appropriately scaled to Tt in sparingly within

primarily single-residence neighborhoods.

T1 T2 T3 T4 T5 T6

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B. Lot.

Lot Size

Width 75'min.; 200'max. ?

Depth 100' min. ?

C. Number of Units.

Units 4 min.; 24 max.

D. Building Size and Massing.

Height

Height 2 stories min.;

4 stories max.1

1Height must also comply with Urban Standards

(Table 4.10).

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Main Body/Secondary Wing(s)

Width 100' max. ?

Depth 40' max. ?

Accessory Structure(s)

No accessory structures are allowed.

E. Allowed Frontages.

Porch, Projecting Shopfront

Stoop Gallery

Forecourt Arcade

Dooryard

F. Pedestrian Access.

The main entry of ground Uoor units is directly oW

of a courtyard or a street.

Courtyards shall be accessible from the front ?

Each unit may have an individual entry.

Stairs accessing upper Uoors may serve no more

than three units

Pedestrian connections should link all buildings to

the public right-of-way, courtyards, and parking

areas

Passages through buildings (zagwans) and

between buildings should be provided to connect

multiple courtyards

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or front.

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Sec. 4 Urban Standards | Petaluma SmartCode Page 99 of 139

Parking may be accessed from the front only when there is no adjacent alley or side street.

Parking spaces may be enclosed, covered or open.

H. Private Open Space.

No private open space requirement.

I. Courtyard(s).

Width 20' min.; 50' max. ?

Width-to-Height Ratio 1:2 min. to 2:1 max.

Depth 20' min.; 150' max. ?

Depth-to-Height Ratio 1:1 to 3:1

Area (total) 400 sf min.;

50 sf/unit min.

Buildings must deTne a minimum of two

courtyard edges

Courtyard edges not deTned by building should be

deTned by a 6' stucco or masonry wall

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 100 of 139

Historic main street mixed-use buildings

A three story main street mixed-use building

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 101 of 139

A small mains street mixed-use building

A. Description. Main Street Building: This Building Type is a small- to medium-sized structure, typically attached,

intended to provide a vertical mix of uses with ground-Uoor commercial, service, or retail uses and upper-Uoor

commercial, service, or residential uses. Smaller versions of this Type include live/work and work/live units. This

Type makes up the primary component of a neighborhood main street and portions of a downtown main street,

therefore being a key component to providing walkability.

T1 T2 T3 T4 T5 T6

B. Lot.

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 102 of 139

Lot Size

Width 25' min.; 150' max. ?

Depth 100' min.; 150' max. ?

C. Number of Units.

Units 2 min.

D. Building Size and Massing.

Height

Height 2 stories min.;

6 stories max.1

1Height must also comply with Urban Standards

(Table 4.10).

Main Body

Width 150' max. ?

Depth 65' max. ?

Secondary Wing(s)/Accessory Structure(s)

Width 100' max. ?

Depth 65' max. ?

Separation from Main 10' min. ?
Body

A Secondary Wing/Accessory Structure shall have

a smaller footprint, a narrower width, and a depth

not greater than the Main Body.

E. Allowed Frontages.

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 103 of 139

Forecourt Dooryard

Shopfront Gallery

Terrace Arcade

F. Pedestrian Access.

Upper Uoor units located in the Main Body ? shall be accessed by a common entry along

the front.

Ground Uoor units may have individual entries ? along the front or side street.

On corner lots, units in a secondary wing/ ? accessory structure may front the side street.

G. Vehicle Access and Parking.

Parking may be accessed from the alley, side street or alley.

Parking drives and access may be shared on adjacent lots.

On-site parking spaces may be enclosed or open.

Garages may be detached or tuck-under.

H. Private Open Space.

No private open space requirement.

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 104 of 139

A. Description. Mid-Rise: This Building Type is a medium to large-sized structure, 4 to 8 stories tall built on a

large lot that incorporates structured parking. This building type can be used to provide a vertical mix of uses with

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 105 of 139

ground-Uoor commercial, service, or retail uses and upper-Uoor commercial, service, or residential uses; or may be

a single use building, typically service or residential, where ground Uoor retail is not appropriate. This Type is a

primary component of an urban downtown providing high density buildings.

T1 T2 T3 T4 T5 T6

B. Lot.

Lot Size

Width 100' min.; 200' max. ?

Depth 100' min.; 150' max. ?

C. Number of Units.

Unrestricted

D. Building Size and Massing.

Height

Height 4 stories min.;

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 106 of 139

Height

6 stories max.1

1Height must also comply with Urban Standards

(Table 4.10).

Footprint

Floors 1-2

Width 200' max. ?

Depth 150' max. ?

Lot Coverage 100% max.

Floors 3+

Width 150' max. ?

Depth 65' max. ?

The Uoorplate of any Uoor may not be larger than

the Uoor below.

E. Allowed Frontages.

Shopfront Dooryard

Gallery Terrace

F. Pedestrian Access.

Upper Uoor units shall be accessed by a ? common entry along the front.

Ground Uoor units may have individual entries ? along the front or side street.

G. Vehicle Access and Parking.

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 107 of 139

Parking may be accessed from the front, alley or side street.

Parking may be accessed from the front only when there is no adjacent alley or side street.

On-site parking spaces shall be in a structured garage.

H. Private Open Space.

No private open space requirement.

Podium tops should be used to provide open space.

I. Courtyard(s).

Width 20' min.; 50' max. ?

Width-to-Height Ratio 1:2 to 2:1

Depth 20' min.; 150' max. ?

Depth-to-Height Ratio 1:1 to 3:1

A. Mid-Rise Buildings in T6/T5.

Front/Side Street Setback

Floors 5+ 10' min. ?

The Petaluma SmartCode is current through Ordinance 2864, passed October 2, 2023.

Sec. 4 Urban Standards | Petaluma SmartCode Page 108 of 139

Side/Rear Setback

Abutting T6/T5

Floors 1-4 0' min. ?

Floors 5+ 10' min. ?

Abutting T4

Floors 1-4 10' min. ?

Floors 5+ 20' min. ?

Abutting T3

Floors 1-2 10' min. ?

Floors 3-4 20' min. ?

Floors 5+ 30' min. ?

The Uoorplate of any Uoor may not be larger than

the Uoor below.