Zoning could vary widely based on exactly where you want to place your tiny house. In general, you start with city zoning, then county zoning and then state zoning. If city / county has no zoning in place for a tiny house, the default is state zoning. Each county page will list available zoning laws for the city and county where applicable. If you don’t see the city you are interested in listed and HAVE the resource link(s) for that city, send them to info AT bayareatinyhome DOT com.

ADU

STATE
Accessory Dwelling Unit (ADU) Memorandum
SB 229
AB 494
SB 831
SB 1069
AB 2299
AB 2406

COUNTY
San Mateo County Accessory Dwelling Unit (ADU)
County of San Mateo Planning & Building Department Contact Information
San Mateo County Second Unit Resources Center Permitting

CITY
Atherton Accessory Dwelling Unit (ADU) Municipal Code 17.52
Belmont Accessory Dwelling Unit (ADU) Ordinance 2017-1118
Burlingame Accessory Dwelling Unit (ADU) Municipal Code 25.60.010
Daly City Accessory Dwelling Unit (ADU)
Foster City Accessory Dwelling Unit (ADU) Municipal Code 17.78
Half Moon Bay Accessory Dwelling Unit (ADU) Municipal Code 18.33
Hillsborough Accessory Dwelling Unit (ADU)
La Honda is using San Mateo County standards
Menlo Park Accessory Dwelling Unit (ADU) Municipal Code 16.79
Millbrae is using California state standards as of 10.13.17
Pacifica Accessory Dwelling Unit (ADU)
Redwood City Accessory Dwelling Unit (ADU)
San Carlos Accessory Dwelling Unit (ADU) Ordinance 18.23
San Mateo Accessory Dwelling Unit (ADU) Ordinance 2017-5
South San Francisco Accessory Dwelling Unit (ADU) Municipal Code 20.350.035
Woodside Accessory Dwelling Unit (ADU) Municipal Code 153.049

CONTAINER

In an email received from Will Gibson dated 3.20.18…

“Manufactured and prefab homes are allowed in the County; I don’t have any specific information on shipping containers, but if a home built from that material could meet building code and other standards, it might be allowed.”

If you would like to contact San Mateo County resources to show your support in revising the laws for shipping containers, please reach out to:

Will Gibson
Planner – Planning and Building Department
County of San Mateo
wgibson@smcgov.org
650.363.1816

Melissa Ross
Senior Planner – Planning and Building Department
County of San Mateo
mross@smcgov.org
650.599.1559

THOW

In an email received from Will Gibson dated 3.20.18…

”While you can park a trailer or mobile home on a property, you’re not allowed to reside in it, since a mobile home (on wheels), except within the confines of a mobile home park, is not a legal residence, and doesn’t meet habitability standards. A home on wheels is the same: unless the home is permanently affixed to a foundation, it’s a vehicle, not a residence, and therefore not legally habitable. It also needs, like all homes in the unincorporated County, to be connected to permanent electrical, water, and sewer service, and meet seismic safety, fire, and other structural standards. There’s no specific regulation that says “tiny homes aren’t allowed,” because size is not the issue: the wheels are the issue, and our regulations are quite clear in stating that you cannot reside in a vehicle. In addition, a wheeled vehicle doesn’t meet a number of requirements of the County’s building code.”

If you would like to contact San Mateo County resources to show your support in revising the laws for THOW, please reach out to:

Will Gibson
Planner – Planning and Building Department
County of San Mateo
wgibson@smcgov.org
650.363.1816

Melissa Ross
Senior Planner – Planning and Building Department
County of San Mateo
mross@smcgov.org
650.599.1559

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