Quick Comparison
| Firm | Founded / Tenure & Credentials | Services & Specialties | Geographic Focus |
|---|---|---|---|
| William J. Guarini Inc. | 1921 (William J. Guarini founder; incorporated 1973); over a century of continuous Jersey City service | NJ Master Plumber, BBB Accredited | 430 Danforth Avenue Jersey City base (07305); Jersey City plus Bergen, Essex, Hudson counties |
| Lou Guarini Plumbing & Heating | Four-generation family operation serving Jersey City | NJ State Master Plumber #6574, NJ HVAC #19HC00110500, NJ Contractor #13VH00047500, BBB Accredited | 240 Woodward Avenue Rutherford NJ base (07070); Jersey City plus Hudson, Bergen, Essex counties |
| Carmine P. Aumenta Plumbing & Heating Co. | 1977 (Carmine P. Aumenta founder); third-generation family operation; current owners are two Aumenta brothers | NJ Master Plumber #36BI00538700, BBB Accredited | Jersey City service area; Hudson, Morris, Somerset, Union counties |
| DMC Plumbing & Heating | 1988 era founder lineage (38+ years operating tenure); family-owned and operated; owners take active part in daily company operations | NJ Master Plumber, BBB Accredited | 162 West 54th Street Bayonne NJ base (07002); Jersey City plus Bayonne and Hoboken |
1. William J. Guarini Inc.
- Address: 430 Danforth Avenue, Jersey City, NJ 07305
- Phone: (201) 754-1095
- Founder: William J. Guarini (founded 1921; incorporated 1973); continuous family-line operation across 105 years
- Operating Since: 1921 (105 years; one of the longest continuously operating plumbing firms in Hudson County)
- License: NJ Master Plumber; BBB Accredited
- Service area: Jersey City (downtown, Journal Square, Heights, Greenville, West Side, Lafayette, Bergen-Lafayette, Communipaw, McGinley Square, Hamilton Park, Paulus Hook, Newport, Liberty State Park) plus Bergen, Essex, Hudson counties
- Website: guariniplumbing.com
105 Years of Continuous William J. Guarini Family Operation
William J. Guarini founded the firm in 1921 in Jersey City. The business was formally incorporated in 1973 after more than 50 years of operation. Across 105 years of continuous family-line operation, the firm has grown from a small plumbing business into a multi-faceted home services operator serving Bergen, Essex, and Hudson counties. The 105-year operating tenure ranks Guarini among the longest-tenured family-owned plumbing operations in northern New Jersey.
Danforth Avenue Jersey City Base
The 430 Danforth Avenue Jersey City headquarters positions the firm in the Greenville section of Jersey City (07305). The position brings dispatch within across all Jersey City neighborhoods including downtown, Journal Square, Heights, Greenville, West Side, Lafayette, Bergen-Lafayette, Communipaw, McGinley Square, Hamilton Park, Paulus Hook, Newport, and the Liberty State Park corridor. Service extends into Bergen, Essex, and Hudson counties.
NJ Master Plumber Compliance Across 105 Years
William J. Guarini Inc. operates under New Jersey Master Plumber credentialing through the State Board of Examiners of Master Plumbers under the NJ Division of Consumer Affairs. The 105-year operating history plus continuous NJ Master Plumber credentialing supports a verifiable multi-generation compliance record. BBB Accreditation provides third-party reputation verification.
2. Lou Guarini Plumbing & Heating
- Address: 240 Woodward Avenue, Rutherford, NJ 07070
- Phone: (201) 333-5314
- Founder: Guarini family founder lineage; four-generation family operation; current ownership in fourth Guarini generation
- Operating Since: Four-generation continuous Guarini family operation
- License: NJ State Master Plumber #6574; NJ HVAC #19HC00110500; NJ Contractor #13VH00047500; BBB Accredited
- Service area: Jersey City plus Hudson County (Bayonne, Hoboken, Union City, Weehawken, North Bergen, West New York, Secaucus, Kearny), Bergen County (Rutherford, East Rutherford, Lyndhurst, Carlstadt, Wallington), Essex County
- Website: jerseycityplumbers.com
Four Guarini Family Generations Serving Jersey City
Lou Guarini Plumbing & Heating has served Jersey City across four Guarini family generations. The firm operates as a family-owned and family-operated business providing plumbing, heating, bathroom remodel, kitchen plumbing, and water heater service. Four-generation operating depth supports unbroken trade-knowledge transmission across the firm’s continuous family ownership line.
Rutherford NJ Base With Jersey City and Multi-County Reach
The 240 Woodward Avenue Rutherford NJ headquarters opens rapid dispatch coverage across the northern New Jersey metro footprint. Service extends through Jersey City plus Hudson County (Bayonne, Hoboken, Union City, Weehawken, North Bergen, West New York, Secaucus, Kearny), Bergen County (Rutherford, East Rutherford, Lyndhurst, Carlstadt, Wallington), and Essex County. The firm specializes in heating, bathrooms, kitchens, and water heaters.
NJ Master Plumber #6574 Plus HVAC and Contractor Multi-License Posture
Lou Guarini Plumbing & Heating operates under three New Jersey credentials: NJ State Master Plumber #6574, NJ HVAC #19HC00110500, and NJ Home Improvement Contractor #13VH00047500. Combined plumbing, HVAC, and contractor credentialing supports unified residential service across plumbing, heating, kitchen, and bathroom remodel scope. BBB Accreditation provides third-party reputation verification.
3. Carmine P. Aumenta Plumbing & Heating Co.
- Address: 309 Sip Avenue, Jersey City, NJ 07306
- Phone: (201) 333-3000
- Founder: Carmine P. Aumenta (founded 1977); third-generation family operation; current owners are two Aumenta brothers
- Operating Since: 1977 (49 years)
- License: NJ Master Plumber #36BI00538700; BBB Accredited
- Service area: Jersey City plus Hudson County (Bayonne, Hoboken, Union City, Weehawken, North Bergen, West New York), Morris County, Somerset County, Union County
- Website: aumentaplumbing.com
Three Aumenta Generations Across 49 Years
Carmine P. Aumenta founded the firm in 1977. Across 49 years of continuous Aumenta family ownership, the firm has built a four-county northern New Jersey service grid covering Hudson, Morris, Somerset, and Union counties. Two Aumenta brothers now run the business as third-generation owners. The firm operates on values of honesty, reliability, and integrity passed down through the family ownership line.
Hudson County Base With Multi-County Northern NJ Reach
The Hudson County operating base speeds dispatch reach across the Jersey City metro plus the Morris-Somerset-Union county corridor. Service extends through Jersey City, Bayonne, Hoboken, Union City, Weehawken, North Bergen, West New York, plus the Morris, Somerset, and Union county service zones.
NJ Master Plumber #36BI00538700 Plus Three-Generation Compliance Record
Carmine P. Aumenta Plumbing & Heating operates under New Jersey Master Plumber license #36BI00538700 issued through the State Board of Examiners of Master Plumbers. The three-generation continuous family ownership plus 49-year operating tenure supports a verifiable compliance record. BBB Accreditation provides third-party reputation verification.
4. DMC Plumbing & Heating
- Address: 162 West 54th Street, Bayonne, NJ 07002
- Phone: (201) 437-5751
- Founder: Founder lineage 1988 era; 38+ years operating tenure; family-owned and operated; owners take active part in daily company operations
- Operating Since: 1988 era (over 38 years)
- License: NJ Master Plumber; BBB Accredited
- Service area: Jersey City plus Bayonne, Hoboken, Hudson County (Union City, Weehawken, North Bergen, West New York, Secaucus, Kearny), plus broader Hudson and Bergen county service
- Website: dmcplumbingandheating.com
Over 38 Years of Continuous Family-Owned DMC Operation
DMC Plumbing & Heating has operated for over 38 years as a family-owned and operated business. The owners take an active part in daily company operations, supporting hands-on service delivery across plumbing, heating, and air conditioning categories. Across 38-plus years of continuous family ownership, DMC has built a sustained Bayonne-and-Jersey-City reputation.
West 54th Street Bayonne Operating Base
The 162 West 54th Street Bayonne headquarters establishes the firm at zip 07002. The position enables rapid dispatch across Bayonne plus Jersey City and the Hudson County metro footprint. Service depth covers sinks, toilets, water heaters, boilers, furnaces, air conditioning systems, and heating systems for residential and commercial customers.
NJ Master Plumber Compliance Plus Multi-Trade Service Mix
DMC Plumbing & Heating operates under New Jersey Master Plumber credentialing through the State Board of Examiners of Master Plumbers. Combined plumbing-heating-cooling service depth supports unified residential and commercial project work. BBB Accreditation provides third-party reputation verification. Continuous owner-operator daily involvement supports a verifiable family-owned compliance posture.
Reference Notes
New Jersey plumbing licensing runs through the State Board of Examiners of Master Plumbers under the NJ Division of Consumer Affairs. The Board issues Master Plumber credentials through sequentially numbered records. Verification runs through the NJ Division of Consumer Affairs license search portal. The Board offices sit at 124 Halsey Street, 6th Floor, Newark, NJ 07101. The City of Jersey City Department of Housing, Economic Development and Commerce issues building permits within Jersey City limits. SUEZ Water New Jersey (Veolia) handles water service connections plus annual backflow-prevention testing across Jersey City.
Jersey City-area residential housing reflects more than 175 years of construction. Pre-1850 housing remains in the historic Paulus Hook, Bergen-Lafayette, and Hamilton Park districts. The 1850-1920 streetcar-suburb expansion built out Greenville, the Heights, Journal Square, Lafayette, Communipaw, McGinley Square, and the West Side. Pre-war Tudor-revival, Colonial-revival, brownstone, and rowhouse housing filled out 1900-1940 across Hamilton Park, Paulus Hook, Heights, Journal Square, and the Bergen-Lafayette corridor. Postwar tract construction built out the Greenville expansion plus Hudson County suburban service through 1945-1980. The 2000s-present drove the Newport, Powerhouse Arts District, and Exchange Place high-rise residential expansion. Cast-iron drain stacks, galvanized supply piping, lead service lines, steam-and-radiator boilers, plus high-rise vertical-stack risers shape recurring service categories across the dense urban housing stock.
The four firms profiled cover four positions on the Jersey City market arc. William J. Guarini Inc. leads tenure with 105 years of continuous family-line operation since William J. Guarini’s 1921 founding, supported by NJ Master Plumber credentialing from a Danforth Avenue Greenville Jersey City base. Lou Guarini Plumbing & Heating follows with four-generation Guarini family service across Jersey City, supported by NJ State Master Plumber #6574, NJ HVAC #19HC00110500, and NJ Contractor #13VH00047500 from a Rutherford NJ base. Carmine P. Aumenta Plumbing & Heating brings 49 years of three-generation Aumenta family ownership since Carmine P. Aumenta’s 1977 founding. Two Aumenta brothers now run the firm. DMC Plumbing & Heating runs over 38 years of family-owned operation from a West 54th Street Bayonne base.
Verification paths run through the NJ Division of Consumer Affairs license search and BBB New Jersey listings. Additional checks run through the NJ Council of Master Plumbers directory plus the Jersey City Department of Housing, Economic Development and Commerce contractor records. Pre-1900 Paulus Hook and Bergen-Lafayette housing tilts toward William J. Guarini’s 105-year operating depth. Four-generation Hudson and Bergen county residential and commercial service fits Lou Guarini Plumbing & Heating. Three-generation Hudson-Morris-Somerset-Union county service fits Carmine P. Aumenta Plumbing & Heating. Bayonne-and-Jersey City residential plumbing-heating-cooling service since 1988 fits DMC Plumbing & Heating. National rollup brands operating in northern New Jersey (Authority Brands’ Benjamin Franklin Plumbing, Neighborly’s Mr. Rooter, Service Experts, Roto-Rooter, Wrench Group, Redwood Services, Master Trades Group, ARS, Apex Service Partners, Turnpoint Services) sit outside the four-firm independent profile. Pruzansky Plumbing (founded 1910 in northern NJ; profiled in the Newark directory) covers an additional historic operator outside this Jersey City list.
Selection Methodology
Selection follows four criteria. First, continuous family ownership or founder-operator continuity outside the national rollup pattern. Second, verifiable NJ Master Plumber license cross-checked through the NJ Division of Consumer Affairs license search. Third, BBB Accreditation or equivalent third-party rating. Fourth, minimum 10-year continuous operating tenure with documented Jersey City 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, Turnpoint Services) are excluded.
Frequently Asked Questions
How do I verify a Jersey City plumber’s license?
Use the NJ Division of Consumer Affairs license search portal. Search by license number or business name. Confirm active NJ Master Plumber status, bonding, and insurance before authorizing work. Contact the State Board of Examiners of Master Plumbers at (973) 504-6420 for verification questions.
What credentials should a Jersey City plumber hold?
At minimum: NJ Master Plumber credential plus general liability insurance and workers’ compensation coverage. New Jersey requires a $3,000 bond plus 4 years apprentice plus 1 year journeyman experience for Master Plumber licensure. Specialty work (gas line, backflow prevention, fire sprinkler, sewer lateral, boiler service, high-rise vertical riser work) may require additional credential layers.
How can I tell if a Jersey City 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 Jersey City?
Burst pipes, sewer backups, gas leaks, no-water events, frozen-pipe events, water heater failures, and high-rise vertical-stack riser leaks justify after-hours dispatch. Cold winter snaps drive freeze-burst pipe demand across northern New Jersey. 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 NJ Division of Consumer Affairs license search before authorizing work. Information current as of the date below; firm details may change without notice. Last updated: 2026-05-10.