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General Information
• Unincorporated Alameda County
• Zip Code: 94580
• Population: 23,452
• Median household income: $93,875
• Housing Units: 7,674
• Percentage Owner-Occupied Housing:
72.3%
• Median Value Owner-Occupied Housing:
$419,300
• Average Persons per Household: 3.30
• Median Gross Rent: $1,743
Real Estate-Related Policies and Regulations
For-Sale and Open House Sign Regulations
As part of the unincorporated area of Alameda County, California, San Lorenzo does not have an
official code and so requires compliance with the County Code of Ordinances. It is suggested to
ensure sign placement does not obscure traffic visibility or impede pedestrian traffic.
In general, two (2) signs are permitted per lot; six (6) square feet maximum area per sign; sign(s)
may not be illuminated; and one (1) sign may be placed for each one hundred (100) feet of street
frontage.
The Alameda County Planning Department recommends placing and removing open house signs
the same day as the property is being held open. Detailed information is available at:
AlamedaCountyMunicipalCode/Signs
For more information call Alameda County Planning Department: (510) 670-5400
Time-of-Sale Requirements
None.
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Potential Disclosure Issues
The potential disclosure issues and resource list below are not intended to be all-inclusive. The
Alameda County Disclosures and Disclaimers Advisory is available from the Bay East
Association of REALTORS®.
Aircraft Noise: There are several airports in and around Alameda County that may create a
certain level of noise and have flight patterns subject to change. For more information on a
particular airport contact:
• Livermore Airport, 636 Terminal Cir., Livermore, CA (925) 960-8220
• 63CN Livermore, CA (925) 606-1536
• Hayward Executive Airport 20301 Skywest Dr., Hayward, CA (510) 293-8678
• Little Hands Airport 18320 Bollinger Canyon Rd., San Ramon, CA (415) 837-8981
• Oakland International Airport 1 Airport Dr., Oakland, CA (510) 563-3300
Energy Efficiency Program Financing - Property Assessed Clean Energy (“PACE”): PACE
financing is available to property owners engaging in energy efficiency, renewable energy, and
water conservation upgrades to buildings. PACE financing is attached to the home, repaid
through the property tax bill, and is transferred to subsequent owners until paid off. San Lorenzo
participates in the CaliforniaFIRST Program and PACE Funding for residential and/or
commercial properties. Information about these programs is available at:
http://www.pacenation.us/resources/all-programs/ or http://cscda.org/Open-PACE
Flood, Fire, and/or Seismic Zones: Portions of the unincorporated areas of Alameda County
are located in flood, fire, and/or seismic zones. To find out if a property is located in one of
these areas contact:
• Flood Information: contact the Engineering Department in the Alameda County Flood
Control and Water Conservation District: (510) 670-5480.
• Fire Information: contact the Alameda County Fire Department: (510) 670-5853.
• Seismic Information: contact the Association of Bay Area Governments Earthquake
Program: (510) 464-7900 or visit: http://quake.abag.ca.gov
Tree Ordinance: The County Tree Ordinance requires property owners planning to perform any
of the following activities to obtain an approved permit from the Alameda County Public Works
Agency: Pruning/ Trimming of branches over one (1) inch in diameter (permits are not required
for minor pruning of branches one (1") inch in diameter or less), planting or removing a tree. For
more information visit: https://www.acpwa.org/codes-and-ordinances#S130
Watercourse Protection: Every person owning property through which a watercourse passes, or
said person's lessee or tenant, shall keep and maintain that part of the watercourse within said
property reasonably free of trash, debris, excessive vegetation and other obstacles which would
pollute, contaminate or significantly retard the flow of water through the watercourse; shall
maintain existing privately owned structures within or adjacent to a watercourse, so that such
structures will not become a hazard to the use, function or physical integrity of the watercourse;
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and shall not remove healthy bank vegetation beyond that actually necessary for said
maintenance or other maintenance specified in Section 13.12.190C of this chapter, nor remove
said vegetation in such a manner as to increase the vulnerability of the watercourse to erosion.
Watercourse Protection Ordinance
Real Estate Developer and Rehabilitation of Real Estate: Every person engaged in the
business of developing or rehabilitating and selling real property in which said person has equity,
interest or title, and not specifically taxed by Section 3.04.350 or other provisions of this chapter,
shall pay a business tax of one dollar and twenty-five cents ($1.25) for each thousand dollars
($1,000.00) of permit value for building permits obtained for work engaged in at sites within the
unincorporated areas of the county. Real Estate Rehabilitation Ordinance
Sidewalk Repair Program: The Sidewalk Repair Program applies only to single-family
residential units in the following five county communities within County Planning Area 2:
Ashland, Castro Valley/Fairmont, Cherryland, Unincorporated Hayward/Fairview, and San
Lorenzo/Royal Sunset.
Funded through Measure B funds, this program will reimburse 50% of the sidewalk repair cost
per property (or up to $750, whichever is less) for sidewalk-related repairs to the frontage of a
single family residential parcel within Planning Area 2. Homeowners residing in San Lorenzo
may be eligible for additional assistance through Redevelopment funds. For more information
contact the Public Works Agency: (510) 670-5500.
Taxes, Bonds and Assessment Districts
Real Estate Transfer Tax: County Transfer Tax: $1.10/per $1000 property value
Flood Benefit Assessment: The Alameda County Flood Control and Water Conservation
District levies benefit assessments to help finance flood control operations. These assessments
are proportionate to the runoff from each parcel of land. The program applies to all Alameda
County with the exception of the Cities of Albany, Berkeley, Alameda, Piedmont, and the Zone
7 area east of the hills (Livermore-Amador Valley).
For more information contact the Assessor’s Office: (510) 272-3787.
For property-specific information, contact Alameda County Assessor’s Office: (510) 272-3787
or search online by parcel number or address at AlamedaCountyTaxInformation
Rent Control, Rent Review and Landlord Responsibilities
Rent Control: The County of Alameda has a rent control ordinance for mobile home parks. The
Ordinance specifies the maximum space rental increase cannot exceed 5% annually unless the
Board of Supervisors approves a request for a higher increase. Mobile Home Park Ordinance
Business License Requirements: You must obtain a business license from Alameda County
only if you are conducting any type of business, including leasing residential and commercial
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property, or your business is based in an unincorporated area of Alameda County. Alameda
County Business License
Special Study or Planning Zones
None.
Additional Information
Dog Licenses: Every dog owner must license their dog which is four months or older and
licenses must be renewed annually. Find details at: AlamedaCountyPetLicensing
Type/Term
1 Year
2 Year
3 Year
Unsterilized
$20.00
$30.00
$40.00
Sterilized
$10.00
$15.00
$20.00
Senior Citizens (62+) - Pet License 50% Discount
Replacement Tags - $5.00
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San Lorenzo/Alameda County Resources
Building Division
Business License
Cable and/or Phone
XFINITY from Comcast
Cable and/or Phone
AT&T U-verse
Electricity
PG&E
Environmental
Services
!!
Finance Department
Fire Department
Garbage
Oro Loma Sanitary District
Gas
PG&E
Housing Authority
Housing Authority of Alameda
County
Permit Department
Planning/Zoning Dept
Alameda County Planning
Department
Sheriff Department
Public Works
Recycling
Water
EBMUD
Online Resources
• Castro Valley/Eden Area Chamber of Commerce: http://www.edenareachamber.com/
• San Lorenzo Unified School District: http://www.slzusd.org/
• County of Alameda: https://www.acgov.org/
• County of Alameda Codes and Ordinances: https://www.acpwa.org/codes-and-
ordinances#S130
• Housing Authority of the County of Alameda: http://www.haca.net/
• East Bay Rental Housing Association: http://ebrha.com/property-owners/
• Source: U.S. Census Bureau: SanLorenzoQuickFacts
DISCLAIMER: The information provided herein is current as of the date below. The intention of this document is to
increase awareness and should not be considered a comprehensive list since all information may not be known to
Bay East Association of Realtors or may have changed since publication. Bay East recommends real estate
professionals contact local officials to determine current codes, regulations, practices and policy requirements.
Document Update: November, 2017