Hot job leads · Castro Valley

Castro Valley has no city hall: county license, permits and work hours

No city government stands behind a Castro Valley job. Because the community is unincorporated, the business license comes from the Alameda County Treasurer-Tax Collector and renews every January 1, permits come from the county Public Works Agency, and work hours come from the county noise ordinance: 7 to 7 on weekdays, 8 to 5 on weekends. Four homes in ten predate 1960, and the Hayward Fault runs through the western part of town.

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New job: Plumbing in Anita and San Miguel avenues, Castro Valley. See the job and the price before you pay: thehandymansflive.com/l/…

New job: TV Mounting near Hayward. Open the link to see it.

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Business license
Alameda County Treasurer; renew each January 1
Source: treasurer.acgov.org: business license taxes faqs (opens in a new tab)
Median home built
1966 (ACS 2019-2023)
Source: data.census.gov
Built before 1960
40.5% of 22,909 housing units (ACS 2019-2023)
Source: data.census.gov
Construction hours
Weekdays 7am-7pm; Saturday and Sunday 8am-5pm
Source: library.municode.com: code of ordinances (opens in a new tab)

Working legally here

A county business license, not a city one

Castro Valley is unincorporated, so the license to work there comes from the Alameda County Treasurer-Tax Collector rather than a city hall. County rules require it of anyone doing business in the unincorporated area, even when the business is based outside it or already holds another city's license, and the county's FAQ singles out contractors holding a state license as well as 1099 independent contractors. It is a tax for each calendar year on the gross receipts earned in the unincorporated area, renewed every January 1, and penalties apply whether or not a renewal notice arrived. Under 5,000 dollars in receipts no tax is owed, but you still file and pay the registration and state access fees. A new business registers within 15 days of starting work, after county zoning clearance.

Alameda County Treasurer-Tax Collector (opens in a new tab)

Permits

County permits: kitchens, review times and seismic retrofits

  • Kitchens, siding and small roof repairs

    The county Building Inspection Department's Q&A on permit exemptions under the 2025 codes draws the lines. A kitchen needs a permit once walls are opened, outlets, lights or appliances move, or base cabinets carrying plumbing or wiring are replaced; resurfacing cabinets, swapping appliances in the same spot and replacing outlets or fixtures in kind do not. New siding over sound existing siding, and siding repairs under 20 square feet in total, are exempt. So is repair of less than 200 square feet of a roof that was permitted before. Window replacement always needs a permit.

    Alameda County Public Works Agency, Building Inspection (opens in a new tab)

  • Review clocks and the debris plan

    Applications, plans and documents all go through the county's online permit portal, and the published review clock starts only after Planning and Zoning approval. A single-family remodel or addition is allotted five business days for intake, 30 for the first plan review and 15 for each review after that. Since January 1, 2026, a residential addition that adds conditioned space, or a remodel over 1,000 square feet, needs a construction and demolition debris plan under Ordinance 2025-72: 75 percent of inert material such as concrete, tile and stucco diverted from landfill, and 65 percent of everything else.

    Alameda County Public Works Agency, Building Inspection (opens in a new tab)

  • Seismic strengthening near the Hayward Fault

    The Castro Valley General Plan puts the Hayward Fault through the western part of the community, crossing Highway 238 west of the I-580 interchange, and names older soft-story buildings with living space over garages among the most vulnerable. The county's earthquake strengthening guide warns that many wood-framed homes built before the 1970s may not be anchored to their foundations, accepts the ABAG standard retrofit plan set for permit submittals, and requires a building permit for structural work. For hillside or multi-story houses it advises bringing in an architect or engineer first.

    Alameda County Public Works Agency, Building Inspection (opens in a new tab)

The homes

22,909 homes, four in ten older than 1960

The ACS 2019-2023 estimates count 22,909 housing units in the Castro Valley census-designated place, with a median year built of 1966. The 1950s built 23.7 percent of them and the 1940s 12.9 percent, and another 3.9 percent are older still, so 40.5 percent predate 1960. Only 6.7 percent went up in 2000 or later. Detached houses make up 73.1 percent of units, and owners live in 71.5 percent of the 22,242 occupied homes. Utility gas heats 70.7 percent, electricity 24.1 percent and bottled gas 2.3 percent. The work, then, is mostly in owner-occupied postwar houses of the age the county's seismic guide flags, far more than in condos.

Source: U.S. Census Bureau

Houses on the hills of west Castro Valley
Houses on the hills of west Castro Valley. Photo: Lights and freedom, CC BY-SA 4.0, via Wikimedia Commons.

Part by part

Castro Valley neighborhoods as the General Plan maps them

  • The Long Lots

    Long, slim parcels laid out for chicken farming from the 1920s through the 1950s are being subdivided, the General Plan notes, with new houses reached by private roads such as the very tight one off Proctor Road. Deep lots elsewhere have gained flag-lot houses built behind the original home, so check access before you quote.

  • Postwar grids west of the high school and south of I-580

    Postwar starter homes sit on small, regular lots set on a street grid in both places. South of I-580 residential density reaches 14 homes per net acre, the top of a range that falls below one per acre along lower Greenridge Road.

  • Anita and San Miguel avenues

    These two north-south streets frame the plan's multifamily study area between Castro Valley Boulevard and Somerset Avenue, where lots were laid out in the 1920s and apartments kept going up through the 1980s. The plan also names the blocks between Somerset and the boulevard as a place for new housing near the town center and BART.

  • Columbia and Palomares Hills

    Both are planned developments, which the county lets depart from standard zoning in return for permanent open space, and both have the curving streets and cul-de-sacs of subdivisions built between the 1960s and 1990s. Columbia was already a hillside subdivision by 1985; Palomares Hills went up in the late 1980s.

  • Madison Avenue and Common Road

    A canyon-bottom neighborhood governed by a specific plan first prepared in the 1970s and amended in 2006. Many lots are partly steep, a creek and wildlife corridor run through it, and its streets are tight enough to limit emergency vehicle access, so plan where a work truck can stand.

Getting around

A Castro Valley workday: county hours and busy collectors

Section 6.60.070 of the county's General Ordinance Code exempts construction noise only from 7 a.m. to 7 p.m. on weekdays and 8 a.m. to 5 p.m. on Saturdays and Sundays. Interstate 580 and the BART line split the community, and when regional traffic backs onto Castro Valley Boulevard, drivers cut through on Seven Hills Road, Heyer Avenue and 167th-Somerset. Heyer between Redwood Road and Cull Canyon Road clogs at school drop-off and pick-up for Canyon Middle, Castro Valley High and Vannoy Elementary. The dam bridge on Heyer near Cull Canyon Road and the creek bridge on Center Street near Fernwood Court both squeeze traffic.

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  4. Pay, then call the homeowner

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Questions

Working in Castro Valley: what pros ask

I hold a Hayward business license. Is that enough for a Castro Valley job?

No. Hayward's license covers work inside Hayward. Castro Valley is unincorporated Alameda County, and the county requires its own license from anyone doing business in its unincorporated area, wherever the business is based. You owe tax only on the gross receipts earned there, and a new business has 15 days from starting work to register.

Does replacing windows in a Castro Valley house need a permit?

Yes. The county's exemption Q&A for the 2025 codes says window replacement requires a building permit because of the California Energy Code. A retrofit unit must reach a U-factor of 0.4 or better, may be set into the existing opening without disturbing the old flashing, must meet safety glazing rules where they apply, and cannot leave a sleeping room's emergency escape opening worse than the original.

Can I start a saw at 7:30 on a Saturday in Castro Valley?

Not under the county's construction exemption. Alameda County's noise ordinance exempts construction noise only between 8 a.m. and 5 p.m. on Saturdays and Sundays, and between 7 a.m. and 7 p.m. on weekdays. Castro Valley follows that county ordinance because it has no city code of its own, so a 7:30 start is fine on a Tuesday and too early on a Saturday.

Can I run my handyman business from a Castro Valley home?

Usually, with conditions. The county taxes home-based businesses like any other and requires zoning clearance before it licenses a new business or one moving address, and its Zoning Ordinance limits which operations may run from a home. Homeowners association CC&Rs are not enforced by county zoning, but the county warns that breaking them can bring fees from the association.

Will the hot list send me work outside Castro Valley too?

Yes. The list does not sort by town: between 8 a.m. and 8 p.m., each new job anywhere in the Bay Area goes out by text as it goes on sale, in any trade, so handyman leads in Castro Valley arrive mixed with work from San Leandro, Hayward and farther away. Opening the link shows the job and its price before any payment. Jobs you skip cost nothing, there is no monthly plan or bidding round, and STOP ends the texts.

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Where these facts come from

Checked against these public sources in October 2026. Rules and fees change: confirm license and permit requirements with the city before work starts.

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