Quick Comparison
| Firm | Founded / Tenure & Credentials | Services & Specialties | Geographic Focus |
|---|---|---|---|
| Berkeley Plumbing and Heating | 1906 (120 years); four Wind family generations | CA CSLB #293715 (six licenses total), UA Local 159/342/38, BBB Accredited | Dwight Way base in Berkeley (94704); Berkeley, El Cerrito, Oakland, Claremont, Piedmont, Rockridge, Albany, Richmond, Emeryville, Kensington |
| Val Betti Plumbing | 1946 (80 years); three Betti family generations | CA CSLB #196928, BBB Accredited, PHCC of Alameda & Contra Costa Counties member | Macdonald Avenue base in Richmond (94805); Oakland, Berkeley, Walnut Creek, East Bay |
| Frank Bonetti Plumbing | 1955 (71 years); Bonetti family multi-generation operation | CA CSLB #251165, BBB Accredited | Rutledge Road base in Castro Valley (94546); Oakland, Union City, Fremont, Livermore, Dublin, San Ramon, Danville, Walnut Creek |
| Harry Clark Plumbing and Heating | Harry Clark founding origin (Grand Ave Plumbing); Don and Brad Marshall 1989 acquisition; brothers split into two entities in 2020; three generations of ownership transitions | CA CSLB Plumbing Contractor, BBB Accredited | Broadway base in Oakland (94611); Oakland, Berkeley |
1. Berkeley Plumbing and Heating
- Address: 2160 Dwight Way, Berkeley, CA 94704
- Phone: (510) 841-0883
- Founder: Original 1906 founding; Wind family ownership across four generations; current owner Stephen Wind (fourth generation, son of Walter Wind who held third-generation ownership)
- Operating Since: 1906 (120 years; one of the longest-tenured plumbing operations in the East Bay)
- License: California CSLB #293715 (plus six total licenses); UA Plumbers Local 159, 342, and 38 affiliated; BBB Accredited
- Service area: Berkeley, El Cerrito, Oakland (Rockridge, Piedmont Avenue, Temescal, Lake Merritt, Adams Point, downtown), Claremont, Piedmont, Albany, Richmond, Emeryville, Kensington
- Website: berkeleyplumbing.com
Four Wind Family Generations Spanning 120 Years
Berkeley Plumbing and Heating opened in 1906. The Wind family has owned the operation across four generations. Walter Wind held third-generation ownership. His son Stephen Wind now leads the fourth generation. The 120-year tenure ranks Berkeley Plumbing among the longest-tenured plumbing operations in California. The Dwight Way base roots continuous Berkeley presence across the entire arc.
Dwight Way Berkeley Headquarters
The 2160 Dwight Way headquarters sits in central Berkeley near Telegraph Avenue. The position speeds dispatch reach into Oakland’s adjacent neighborhoods (Rockridge, Piedmont Avenue, Temescal). The East Bay service map extends through El Cerrito, Albany, Richmond, and Kensington north plus Emeryville, Piedmont, and Claremont south. The firm operates a retail store alongside service operations.
CSLB #293715 Plus UA Local 159/342/38 Affiliation
California CSLB #293715 supports Berkeley Plumbing’s contractor credentialing. The firm holds six total licenses across the credentialing portfolio. UA Plumbers Local 159 (Northern California), Local 342, and Local 38 affiliations cover union-trained journeyman and master plumber credentialing through the joint-apprenticeship-and-training-committee framework. The four-generation operating tenure plus the multi-local UA affiliation sit clearly outside the franchise rollup pattern.
Residential, Commercial, and Industrial Service Stack
Berkeley Plumbing covers residential, commercial, and industrial plumbing-and-heating service. The integrated scope supports homeowners, commercial property managers, and industrial-facility customers under one operating relationship. Hard-water service mix across the East Bay aquifer plus pre-1925 housing stock in Berkeley and inner Oakland generate recurring service categories.
2. Val Betti Plumbing
- Address: 3605 Macdonald Avenue, Richmond, CA 94805-2114
- Phone: (510) 232-1018
- Founder: Valentino “Val” Betti (founded 1946 in Richmond); third-generation family ownership; current President Robert Betti
- Operating Since: 1946 (80 years); three Betti family generations
- License: California CSLB #196928 (renewal cycle through 8/31/2026); BBB Accredited; PHCC of Alameda & Contra Costa Counties member
- Service area: Oakland, Berkeley, Richmond, Walnut Creek, El Cerrito, Albany, Pinole, Hercules, Rodeo, Crockett, San Pablo, Concord, Pleasant Hill, Lafayette, Orinda, Moraga, Kensington
- Website: valbetti.com
Three Betti Generations Spanning 80 Years
Valentino “Val” Betti founded the firm in 1946 as a small residential plumbing operation in Richmond, California. Three Betti family generations have run the firm. Current President Robert Betti leads contemporary operations. The 80-year operating tenure spans the post-war East Bay residential expansion, the 1970s-1980s suburban tract development, and the contemporary East Bay renovation cycle.
Macdonald Avenue Richmond Base and East Bay Coverage
The 3605 Macdonald Avenue headquarters sits in central Richmond. The position supports East Bay service across Contra Costa County (Richmond, El Cerrito, Pinole, Hercules) plus Alameda County (Berkeley, Oakland, Albany). Service extends inland through Walnut Creek, Concord, Pleasant Hill, Lafayette, Orinda, and Moraga. The 80-year accumulated trade context covers the diverse East Bay housing stock from pre-war Richmond and Oakland through contemporary Walnut Creek.
CSLB #196928 and PHCC Affiliation
California CSLB #196928 reflects mid-20th-century era licensing consistent with the 1946 founding date. Active renewal status runs through 8/31/2026. PHCC of Alameda & Contra Costa Counties membership signals participation in the formal trade infrastructure. BBB Accreditation provides third-party reputation verification through BBB Greater San Francisco. Three-generation Betti family operating depth distinguishes Val Betti from newer market entrants.
3. Frank Bonetti Plumbing, Inc.
- Address: 20878 Rutledge Road, Castro Valley, CA 94546
- Phone: (510) 581-3658
- Founder: Frank Bonetti (founded 1955 with a small shop); Bonetti family multi-generation operation; Daniel Bonetti and Raymond Bonetti currently serve as Vice Presidents
- Operating Since: 1955 (71 years); Bonetti family operating continuity
- License: California CSLB #251165 (renewal cycle through 5/31/2026); BBB Accredited
- Service area: Oakland, Castro Valley, Hayward, San Leandro, Union City, Fremont, Livermore, Dublin, San Ramon, Danville, Walnut Creek, Pleasanton, Alamo, Lafayette, Orinda, Moraga
- Website: bonettiplumbing.com
Bonetti Family Operating Continuity Since 1955
Frank Bonetti started the firm in 1955 with a small shop. Across 71 years, the Bonetti family has expanded the operation to serve commercial properties and institutions across the greater East Bay and Tri-Valley markets. Daniel Bonetti and Raymond Bonetti both serve as Vice Presidents in the contemporary operating team. The family-owned operating structure has remained intact throughout.
Castro Valley Rutledge Road Base
The 20878 Rutledge Road headquarters sits in Castro Valley, the unincorporated Alameda County community east of Oakland. The position supports East Bay-and-Tri-Valley service across the I-580 corridor. Coverage extends from Oakland west through Castro Valley, Hayward, and San Leandro into the Tri-Valley arc (Livermore, Dublin, San Ramon, Pleasanton). Walnut Creek and Lafayette northern reach rounds out the footprint.
CSLB #251165 and Commercial-and-Institutional Service Mix
California CSLB #251165 reflects mid-1950s era licensing consistent with the 1955 founding date. Active renewal status runs through 5/31/2026. Frank Bonetti specializes in commercial properties and institutions, including school districts, hospitals, and large commercial buildings. The commercial-and-institutional focus separates Bonetti from purely residential operators in the East Bay market.
4. Harry Clark Plumbing and Heating, Inc.
- Address: 3040 Broadway, Oakland, CA 94611 (HVAC and Air Conditioning); 3026 Broadway, Oakland, CA 94611 (Plumbing and Sewer)
- Phone: (510) 444-1960; (510) 444-1776
- Founder: Harry Clark (originally founded as Grand Ave Plumbing); Don and Brad Marshall acquired the firm in 1989; brothers split the operation into two entities in 2020 (Plumbing & Sewer; HVAC & Air Conditioning)
- Operating Since: Founder-era origin under Harry Clark; Marshall brothers’ 1989 acquisition; 35+ years under current ownership; multi-decade Oakland presence
- License: California CSLB Plumbing Contractor; BBB Accredited
- Service area: Oakland (Broadway corridor, Rockridge, Piedmont Avenue, Temescal, Lake Merritt, Adams Point, Lakeshore, Glenview, Montclair, Crocker Highlands), Berkeley
- Website: hcplumbing.com
Harry Clark Founding Plus Marshall Brothers Three-Generation Stewardship
Harry Clark founded the original operation as Grand Ave Plumbing decades ago. Don and Brad Marshall acquired the firm in 1989, becoming the third generation of ownership through the firm’s history. In 2020, the brothers formally split the operation into two entities: Harry Clark Plumbing & Sewer plus Harry Clark Heating & Air Conditioning. The split allowed each operation to focus on its respective trade scope.
Broadway Oakland Operating Base
The Broadway corridor headquarters sits in Oakland near the Piedmont Avenue and Rockridge boundaries. The 3040 Broadway address houses the HVAC operation and the 3026 Broadway address houses the Plumbing and Sewer operation. The position enables rapid dispatch into Oakland’s inner residential corridor (Rockridge, Piedmont Avenue, Temescal, Lake Merritt) plus the broader Oakland residential arc.
CSLB Plumbing Contractor and Two-Entity Split Operating Model
Harry Clark holds California CSLB Plumbing Contractor credentialing through the State License Board. BBB Accreditation provides third-party reputation verification. The 2020 two-entity split lets the Plumbing & Sewer operation focus exclusively on plumbing scope while the HVAC operation handles heating and cooling. Inner-Oakland customers can engage either trade under the unified Harry Clark brand.
Reference Notes
California plumbing licensing runs through the Contractors State License Board (CSLB). The C-36 Plumbing Contractor classification grounds plumbing-specific work. Verification runs through cslb.ca.gov. The City of Oakland Building Bureau issues building permits within Oakland city limits. East Bay Municipal Utility District (EBMUD) handles regional water-and-sewer service connections plus annual backflow-prevention testing across most East Bay communities. Title 24 energy-code revisions, drought-conservation requirements, and seismic-zone Plumbing Code provisions add layered pressures.
Oakland-area residential housing stretches across roughly 150 years. Pre-1900 Victorian-era housing remains in West Oakland, Old Oakland, Adams Point, and parts of the Lake Merritt corridor. Rockridge, Piedmont Avenue, Temescal, and parts of North Oakland filled out with Craftsman and Bungalow housing 1900-1925. The 1923 Berkeley Hills fire reshaped East Bay hill housing through Mediterranean-revival and Tudor-revival reconstruction. Postwar tract construction built out East Oakland and parts of San Leandro through 1945-1970. The 1980s-1990s saw inner-Oakland renovation cycles. The contemporary cycle focuses on West Oakland renovation and Bay Area tech-driven luxury renovation across Piedmont, Crocker Highlands, and the hills neighborhoods.
The four firms profiled cover four positions on the Oakland market arc. Berkeley Plumbing and Heating leads tenure with its 1906 founding plus four Wind family generations across 120 years of operation. The firm holds California CSLB #293715, six total licenses, and UA Local 159/342/38 affiliations. The Berkeley Dwight Way base serves Oakland’s adjacent neighborhoods. Val Betti Plumbing follows with three Betti family generations since Valentino Betti’s 1946 Richmond founding, plus California CSLB #196928 and current President Robert Betti. Frank Bonetti Plumbing brings Bonetti family operating continuity since 1955 plus California CSLB #251165 and Daniel Bonetti and Raymond Bonetti as current Vice Presidents from a Castro Valley base covering the East Bay-and-Tri-Valley commercial-and-institutional market. Harry Clark Plumbing and Heating runs through the Harry Clark founding origin plus Marshall brothers’ 1989 acquisition, with the 2020 two-entity split into Plumbing & Sewer plus HVAC operations from a Broadway Oakland base.
Verification paths run through cslb.ca.gov, BBB Greater San Francisco listings, the PHCC of Alameda & Contra Costa Counties directory, and the City of Oakland Building Bureau contractor records. Pre-1925 Rockridge, Piedmont Avenue, and Temescal housing tilts toward Berkeley Plumbing’s century-spanning four-generation depth. Three-generation East Bay residential service fits Val Betti. Commercial-and-institutional Tri-Valley work fits Frank Bonetti. Inner-Oakland Broadway corridor service fits Harry Clark.
Selection Methodology
Selection follows four criteria. First, continuous family ownership or founder-operator continuity outside the national rollup pattern. Second, verifiable CSLB C-36 Plumbing Contractor license cross-checked via the California Contractors State License Board public lookup. Third, BBB Accreditation or equivalent third-party rating. Fourth, minimum 10-year continuous operating tenure with documented Oakland service coverage. Firms acquired by national franchise networks (Authority Brands’ Benjamin Franklin Plumbing, Neighborly’s Mr. Rooter, Service Experts, Roto-Rooter, Wrench Group, Redwood Services, Master Trades Group, ARS) are excluded.
Frequently Asked Questions
How do I verify an Oakland plumber’s license?
Use the California Contractors State License Board public licensee database at cslb.ca.gov. Search by license number or business name. Confirm active status, classification, bonding, and insurance before authorizing work.
What credentials should an Oakland plumber hold?
At minimum: CSLB C-36 Plumbing Contractor classification plus general liability insurance and workers’ compensation coverage. Specialty work (gas line, backflow prevention, fire sprinkler, sewer lateral, seismic gas-shutoff valves) requires additional credential layers.
How can I tell if an Oakland plumber is locally owned versus a national rollup?
Check ownership disclosures and acquisition history. National franchise brands typically operate under parent-company branding. Search the firm name plus “acquired” or “parent company” to surface ownership structure. The four firms in this directory all run as independent locally-owned operators.
When should I call an emergency plumber in Oakland?
Burst pipes, sewer backups, gas leaks, no-water events, water heater failures, and seismic-event-triggered gas-line shutoffs justify after-hours dispatch. Each firm in this directory offers either 24/7 emergency service or structured after-hours response.
Editorial Note
Compiled by the editorial team. Firm details cross-verified through state license databases, BBB business profiles, and firm-published websites where available. License numbers should be re-verified through the California CSLB public lookup before authorizing work. Information current as of the date below; firm details may change without notice. Last updated: 2026-05-10.