Top 4 Plumbers in Milwaukee, WI

Quick Comparison

Firm	Founded / Tenure & Credentials	Services & Specialties	Geographic Focus
Seider Heating, Plumbing & Electrical	1912 (Arthur Seider and William Pergande, Hopkins Street hardware store origin); four Seider generations	WI Master Plumber, WI Master Electrician, BBB Accredited	Waukesha corporate office; Menomonee Falls branch; Milwaukee, Waukesha County, Menomonee Falls
Tim's Plumbing Co LLC	1919 (Barney Dereszynski Plumbing & Heating, South Side Milwaukee origin); five Dereszynski generations	WI Master Plumber (Tim Dereszynski; 60+ years field experience), BBB Accredited	Oak Creek base on S Howell Ave (53154); Milwaukee Metro and surrounding suburbs
Heiden Plumbing	1925 (Al Heiden and Stan Wyderka founders); three Wyderka generations under current ownership	WI Master Plumber, Plumbers Local Union 75 affiliated, BBB Accredited	W Bruce Street base in Milwaukee proper (53204); Milwaukee and Waukesha Counties; 36+ cities including Bay View, Brookfield, Mequon, Waukesha
C.P. Conway Plumbing	C.P. Conway plumbing diploma 1929; incorporated August 1960; three Conway generations	WI Master Plumber (Rick Conway, current owner), BBB Accredited	West Allis base on S 62nd Street (53214); greater Milwaukee area, Waukesha region

1. Seider Heating, Plumbing & Electrical

Address: N22W22967 Nancys Court, Waukesha, WI 53186 (corporate office); N89W16340 Main Street, Suite B, Menomonee Falls, WI 53051. branch, by appointment
Phone: (262) 436-0505 (Waukesha); (262) 251-8900 (Menomonee Falls)
Founder: Arthur Seider and William Pergande (founded 1912 as a hardware store on Hopkins Street in Milwaukee); 2nd generation Hilbert and Harold Seider (Arthur’s children); 3rd generation Bryan Seider (Harold’s son); 4th generation Blake Seider (Bryan’s son)
Operating Since: 1912 (114 years); four Seider family generations across the Hopkins Street hardware-store origin through the contemporary Waukesha-and-Menomonee-Falls dual-location operation
License: WI Master Plumber; WI Master Electrician (the firm operates Heating, Plumbing & Electrical service lines under appropriate credentialing); BBB Accredited
Service area: Waukesha, Brookfield, Pewaukee, Sussex, Menomonee Falls, Germantown, Wauwatosa, West Allis, Greenfield, Greendale, Hales Corners, Franklin, Milwaukee proper, Mequon, Cedarburg, Grafton, Oak Creek, South Milwaukee, Cudahy, St. Francis, New Berlin, Muskego, Big Bend, Waterford
Website: seider.com

Four-Generation Seider Family Operating Lineage Spanning 114 Years

Seider Heating, Plumbing & Electrical traces its origins to 1912, when Arthur Seider and William Pergande opened a hardware store on Hopkins Street in Milwaukee. Across the 114-year operating history, the Seider family has retained continuous ownership through four generations: Arthur Seider (founder, 1912), Hilbert and Harold Seider (Arthur’s children, second generation), Bryan Seider (Harold’s son, third generation), and Blake Seider (Bryan’s son, fourth generation). The hardware-store origin reflects the integrated retail-and-trade-services business model common in early-20th-century American small towns and city neighborhoods, where the local hardware store and the local trade contractor often operated under unified ownership and shared customer base. Across the intervening decades, the operation evolved away from the retail hardware model and into a focused heating-plumbing-electrical contracting firm now operating from corporate offices in Waukesha (Nancys Court) and a branch location in Menomonee Falls.

Hopkins Street Milwaukee Origin and Waukesha Corporate Relocation

The original Hopkins Street hardware-store location in Milwaukee framed Seider’s first decades of operation. The firm’s later relocation to Waukesha (N22W22967 Nancys Court) reflects the broader suburban-development pattern that shifted commercial-and-trade-services activity outward from central Milwaukee into Waukesha County across the post-World-War-II decades. Waukesha sits west of Milwaukee proper and serves as the seat of Waukesha County, one of the wealthiest counties in Wisconsin and a substantial residential and commercial market in its own right. The Menomonee Falls branch (N89W16340 Main Street) extends operating presence into northern Waukesha County and the Germantown-Sussex corridor.

Triple-Trade Service Portfolio (Heating, Plumbing, Electrical)

Seider’s credential portfolio extends across three distinct trades: heating (HVAC mechanical service), plumbing, and electrical. Wisconsin regulates each trade through separate state-level credentialing systems administered through the Wisconsin Department of Safety and Professional Services (DSPS): plumbing-trade licensing requires master plumber examination passage, journeyman plumber experience hours, and continuing-education renewal under the WI Plumbing Code (SPS 382, SPS 383, SPS 384); electrical-trade licensing operates through a separate master electrician credential tier; and HVAC mechanical work falls under the WI Mechanical Code (SPS 341). The triple-trade integrated service portfolio supports residential customers who would otherwise need to coordinate three separate contractors for whole-home renovation, mechanical-system replacement, or new-construction projects, and the four-generation operating tenure means the firm has accumulated trade-knowledge depth across all three credential tiers.

Wisconsin Master Plumber Licensing and Continuing-Education Compliance

Wisconsin regulates the plumbing trade through the Wisconsin Department of Safety and Professional Services (DSPS) Plumbing Program under chapters SPS 382 (Wisconsin Plumbing Code), SPS 383 (private wells), and SPS 384 (residential and commercial sanitary plumbing) (master plumber licensing requires examination passage, journeyman plumber experience hours, and continuing-education renewal cycles, and the DSPS public credential database is the standard pre-engagement diligence verification step Wisconsin residential customers use. Seider has held continuous Wisconsin master plumber licensure across multiple generations of family ownership, and the four-generation operating tenure under Wisconsin’s plumbing-trade regulatory framework provides a verifiable multi-decade compliance track record.

Family Operating Continuity Versus National Rollup Pattern

Seider Heating, Plumbing & Electrical has remained family-owned and operated under continuous Seider family ownership across the 114-year operating history, without sale to a private-equity rollup or national home-services aggregator. The Milwaukee-area plumbing trade has experienced consolidation pressure from regional and national aggregators (Authority Brands operates Benjamin Franklin Plumbing franchise locations across the region, Mr. Rooter Plumbing operates as a Neighborly franchise system, and various regional consolidators have acquired Wisconsin-area home-services brands across recent decades), and Seider’s continuous family-owned independent positioning distinguishes the firm from acquired-and-rebranded operators. The 114-year tenure and four-generation operating lineage substantially predate the national home-services franchise era.

2. Tim’s Plumbing Co LLC

Address: 6418 C S Howell Avenue, Oak Creek, WI 53154
Phone: (414) 762-5723
Founder: Barney Dereszynski (founded Barney Dereszynski Plumbing & Heating in 1919 on the South Side of Milwaukee, originally at 2922 South 13th Street north of Oklahoma Avenue); current owner Tim Dereszynski (Wisconsin Master Plumber, 60+ years of field plumbing experience); fifth-generation Dereszynski family in operation
Operating Since: 1919 (107 years); five Dereszynski family generations
License: WI Master Plumber (Tim Dereszynski); BBB Accredited
Service area: Milwaukee Metro (South Side, Bay View, Cudahy, St. Francis, South Milwaukee, Greenfield, Greendale, Hales Corners, Franklin, Oak Creek), Bayside, Whitefish Bay, Shorewood, Wauwatosa, West Allis, Brookfield, Waukesha
Website: timsplumbing.com

Five-Generation Dereszynski Family Plumbing Lineage

Tim’s Plumbing Co LLC traces its origins to 1919, when Barney Dereszynski founded Barney Dereszynski Plumbing & Heating on the South Side of Milwaukee, originally at 2922 South 13th Street just north of Oklahoma Avenue. Across the 107-year operating history, the Dereszynski family has retained continuous ownership through five generations of plumbers, with current owner Tim Dereszynski holding the active Wisconsin Master Plumber credential and bringing 60+ years of personal field experience to the operation. Tim grew up around his grandfather, father, and uncles, all of whom were plumbers, embedding institutional trade knowledge across multiple generations of working Dereszynski family plumbers. Tim took over his grandfather’s original 2922 South 13th Street location in 1991 and operated from that address until 2007, when the operation moved to its current Oak Creek facility on S Howell Avenue. Five-generation continuity across 107 years ranks Tim’s Plumbing among the longest-tenured family-owned plumbing operations in Wisconsin.

South Side Milwaukee Origin and Oak Creek Operating Base

The original 1919 location at 2922 South 13th Street sat in the heart of Milwaukee’s South Side, an area dominated by working-class Polish-immigrant residential housing dating predominantly to the 1880s through 1920s build-out cycles. The South Side’s residential housing stock includes substantial Milwaukee-distinctive bungalows, Polish-flat duplexes (a Milwaukee-specific architectural typology with two distinct family residences stacked vertically), and the brick-clad working-class single-family housing that defines neighborhoods like Bay View, Lincoln Village, and Burnham Park. The Dereszynski family’s origins as Polish-American Milwaukee plumbers align with the South Side’s dominant immigrant heritage, and the firm’s accumulated trade knowledge spans the entire arc of Milwaukee South Side residential plumbing infrastructure across more than a century. The current Oak Creek operating base on S Howell Avenue sits in the southern Milwaukee Metro suburban corridor, providing service access across both the South Side urban housing stock and the post-1950 suburban housing in Oak Creek, Cudahy, South Milwaukee, and St. Francis.

Wisconsin Master Plumber Credential and Multi-Generation Trade Practice

Tim Dereszynski’s Wisconsin Master Plumber credential combined with 60+ years of personal field plumbing experience plus inherited trade knowledge from his grandfather, father, and uncles’ plumbing-trade practice gives the firm an unusual depth of institutional plumbing knowledge. Wisconsin’s master plumber licensing tier requires examination passage, journeyman experience hours, and continuing-education renewal under SPS 382 and the broader Wisconsin Plumbing Code framework, and the multi-generation Dereszynski family practice means each generation has progressed through the apprentice-and-journeyman training pipeline before earning master-level credentials. The fifth-generation Dereszynski family progression continues this trade-credential investment pattern.

Family Operating Continuity Outside the Rollup Pattern

Tim’s Plumbing has remained family-owned and operated under continuous Dereszynski family ownership across the 107-year operating history, without sale to a regional consolidator or national home-services aggregator. The five-generation operating tenure and the documented family-trade lineage (with Tim explicitly tracing his plumbing knowledge to his grandfather, father, and uncles) provide a depth of family-business continuity that sets apart the operator from acquired-and-rebranded operators in the Milwaukee Metro market.

3. Heiden Plumbing

Address: 1100 West Bruce Street, Milwaukee, WI 53204
Phone: (414) 937-8420
Founder: Al Heiden and Stan Wyderka (founded 1925); current owner Ken Wyderka (Stan’s son, who purchased the business in 1972); Ken’s family currently operates the firm; three Wyderka family generations
Operating Since: 1925 (101 years); three Wyderka generations under current ownership lineage
License: WI Master Plumber; Plumbers Local Union 75 affiliated; BBB Accredited
Service area: Milwaukee proper (downtown, Walker’s Point, Riverwest, East Side, North Side, South Side, Bay View), Wauwatosa, West Allis, Brookfield, Mequon, Cedarburg, Grafton, Glendale, Whitefish Bay, Shorewood, Bayside, Fox Point, River Hills, Brown Deer, Greendale, Greenfield, Hales Corners, Franklin, Oak Creek, South Milwaukee, Cudahy, St. Francis, Waukesha (36+ cities total)
Website: heidenplumbing.com

101-Year Operating Tenure and Wyderka Family Ownership

Heiden Plumbing was founded in 1925 by Al Heiden and Stan Wyderka, and the operation has continued across 101 years of continuous Milwaukee presence. Stan Wyderka’s son Ken Wyderka purchased the business in 1972, transitioning Heiden Plumbing to second-generation Wyderka family ownership, and Ken’s family currently operates the firm under continuing third-generation Wyderka family involvement. The 1100 West Bruce Street headquarters in Milwaukee proper (zip 53204, in the Walker’s Point/South Side neighborhood) frames the operation in central Milwaukee, providing rapid dispatch access across the full Milwaukee Metro residential service area.

Plumbers Local Union 75 Affiliation

Heiden Plumbing’s plumbers are members of Plumbers Local Union 75, the United Association (UA) local affiliate covering Milwaukee and surrounding southeastern Wisconsin. UA Local 75 operates a five-year apprenticeship program through the joint-apprenticeship-and-training-committee (JATC) framework, providing trade-school instruction, on-the-job training under journeyman supervision, and the credential-progression pipeline through which apprentices advance to journeyman and ultimately master plumber status. Union affiliation is operationally meaningful for residential and commercial customers as a verification of formal trade-training depth, standardized work practices, and prevailing-wage labor compliance for projects subject to public-works prevailing-wage requirements. Heiden’s Local 75 affiliation represents one of the more rigorous credentialing-and-training tracks available in the Wisconsin plumbing trade.

Walker’s Point and South Side Milwaukee Operating Base

The 1100 West Bruce Street headquarters sits in Milwaukee’s Walker’s Point neighborhood, one of the city’s oldest immigrant-settled districts (with substantial 19th-century Polish, German, and Eastern European residential heritage), and immediately adjacent to the Menomonee River industrial corridor and the South Side’s Polish-flat-and-bungalow residential housing stock. The location supports rapid access to the full Milwaukee Metro residential and small-commercial service area, and the 36+ city service-area list extends coverage across Milwaukee County, Waukesha County, Ozaukee County, and parts of Washington County. Heiden’s century of accumulated trade knowledge across this geography spans the Milwaukee-distinctive housing typologies (Polish flats, Cream City brick bungalows, the duplex-and-cottage working-class housing that defines the South Side and Riverwest).

Three Wyderka Generations and Service-Mix Breadth

The three-generation Wyderka family operating tenure (Stan Wyderka co-founder, son Ken Wyderka purchased 1972, current third-generation Wyderka family involvement) provides multi-generation family-business continuity. The service-mix breadth includes residential plumbing repair and installation, commercial plumbing service, sewer-and-drain service, and the broader plumbing-trade work that the diverse Milwaukee Metro housing stock requires across pre-war urban and post-war suburban housing types.

4. C.P. Conway Plumbing

Address: 1231 South 62nd Street, West Allis, WI 53214
Phone: (414) 704-7240
Founder: Charles Patrick (C.P.) Conway (graduated Boy’s Technical School Milwaukee with a plumbing diploma in 1929; incorporated C.P. Conway Plumbing, Inc. in August 1960); 2nd generation Richard Conway (purchased business 1976); 3rd generation Rick Conway (current owner since 2005)
Operating Since: C.P. Conway diploma 1929; firm incorporated August 1960; 66 years of continuous incorporated operation under three Conway family generations
License: WI Master Plumber (Rick Conway); BBB Accredited
Service area: Greater Milwaukee area, Waukesha region, West Allis, Wauwatosa, Brookfield, Greenfield, Greendale, Hales Corners, Franklin, Oak Creek, South Milwaukee, Cudahy, Bay View, Milwaukee proper
Website: cpconwayplumbing.com

Three-Generation Conway Family Plumbing Lineage

C.P. Conway Plumbing traces its origins to 1929, when Charles Patrick Conway graduated from Boy’s Technical School in Milwaukee with a plumbing diploma. C.P. Conway pursued his trade career across the intervening decades and ultimately incorporated C.P. Conway Plumbing, Inc. in August 1960, formalizing what had been an informal trade practice spanning more than 30 years before incorporation. C.P.’s son Richard Conway purchased the business in 1976, transitioning the firm to second-generation family ownership, and Richard’s son Rick Conway took over as current owner in 2005, holding his Wisconsin Master Plumber credential and continuing third-generation Conway family operating leadership. The Conway family operating tenure thus spans from 1929 (diploma) through 1960 (incorporation) through 1976 (second-generation transition) through 2005 (third-generation transition) to the present, with continuing Conway family ownership intact across the entire arc.

West Allis Operating Base and Greater Milwaukee Service Geography

The 1231 South 62nd Street headquarters sits in West Allis, Wisconsin, an inner-ring suburb of Milwaukee with a residential housing stock dominated by 1900s through 1950s working-class single-family housing tied historically to the Allis-Chalmers manufacturing operations that supported the local economy across most of the 20th century. West Allis remains one of the larger Milwaukee Metro inner-ring suburbs, and the 62nd Street headquarters provides positioning that supports service across the full greater Milwaukee area and the Waukesha region.

Wisconsin Master Plumber Credential Continuity Across Three Generations

Each successive Conway family owner has progressed through Wisconsin’s master plumber credentialing pipeline (apprentice through journeyman through master), with C.P. Conway holding his original 1929-era plumbing diploma, Richard Conway succeeding to ownership and master credential under second-generation operating leadership, and Rick Conway holding the current Wisconsin Master Plumber credential under which the firm operates. This three-generation credential continuity provides a verifiable multi-decade compliance track record under Wisconsin’s plumbing-trade regulatory framework (SPS 382 and the broader WI Plumbing Code).

Reference Notes

Milwaukee’s residential plumbing market reflects three operating realities that shape how Milwaukee firms differentiate themselves. The first is housing-stock vintage and Milwaukee-distinctive architectural typologies: Milwaukee’s residential housing stock spans pre-1900 immigrant-settled urban housing on the South Side. Polish-American working-class neighborhoods including Bay View, Lincoln Village, Burnham Park, Walker’s Point and the East Side, substantial pre-1925 Cream City brick bungalow and Polish-flat housing across the inner neighborhoods, mid-century housing in West Allis and the inner-ring suburbs (built out heavily 1925 through 1965 around manufacturing-industry employment hubs like Allis-Chalmers), and post-1970 suburban-development housing in Waukesha County and Ozaukee County. The Milwaukee-distinctive housing typologies (Polish flats with two stacked family residences, Cream City brick bungalows using the local cream-colored brick from Lake Michigan-shore clay deposits, and the working-class duplex-and-cottage housing that defines the South Side and Riverwest) generate plumbing-service-mix characteristics distinct from most other major American cities. Cast-iron drain stacks running through the multi-story Polish-flat structures, galvanized supply piping, and (in the oldest properties) lead service connections from Milwaukee Water Works mains characterize the pre-war Milwaukee plumbing infrastructure that long-tenured operators have accumulated trade knowledge of. The second structural condition is licensing depth: Wisconsin regulates the plumbing trade through the Wisconsin Department of Safety and Professional Services (DSPS) Plumbing Program under chapters SPS 382 (Wisconsin Plumbing Code), SPS 383 (private wells), and SPS 384 (residential and commercial sanitary plumbing), with master plumber, journeyman plumber, and apprentice plumber license tiers requiring examination passage and continuing-education renewal. The DSPS public credential database is the standard pre-engagement diligence verification step Wisconsin residential customers use. Plumbers Local Union 75 affiliation (the UA local for Milwaukee and southeastern Wisconsin) provides an additional credential-and-training-depth layer for unionized operators. The third structural condition is national rollup activity: Authority Brands operates Benjamin Franklin Plumbing franchise locations across the Milwaukee Metro, Mr. Rooter Plumbing operates as a Neighborly franchise system across the region, and various regional consolidators have acquired Wisconsin-area home-services brands across recent decades; the four Milwaukee firms profiled here all operate as locally-owned independent shops outside the franchise consolidator pattern, with multi-generation family ownership (Seider 1912 across four Seider generations; Tim’s Plumbing 1919 across five Dereszynski generations; Heiden 1925 across three Wyderka generations under current ownership; C.P. Conway 1929/1960 across three Conway generations).

Tenure profiles across the four firms vary across approximately a 50-year span, and the ranking aligns with both formal corporate founding dates and family-trade lineage continuity. Seider Heating, Plumbing & Electrical leads on the longest tenure dimension, with a 1912 founding date and four continuous Seider family generations spanning Arthur Seider (founder), his children Hilbert and Harold Seider, Harold’s son Bryan, and Bryan’s son Blake; the 114-year operating tenure and four-generation lineage rank Seider among the longest-tenured family-owned plumbing-and-trades operations in Wisconsin, supported by a triple-trade service portfolio (heating, plumbing, electrical) that materially exceeds the typical single-trade configuration of Milwaukee Metro plumbing operators. Tim’s Plumbing Co LLC follows on the second-longest tenure dimension by founding date. With a 1919 founding under Barney Dereszynski Plumbing & Heating on Milwaukee’s South Side and five continuous Dereszynski family generations now extending to current owner Tim Dereszynski (Wisconsin Master Plumber, 60+ years of personal field experience), with the firm tracing institutional plumbing knowledge across Tim’s grandfather, father, and uncles’ multi-generation plumbing-trade practice; the five-generation operating tenure ranks Tim’s Plumbing among the longest family-trade-lineage operations in the Milwaukee Metro market. Heiden Plumbing’s three-generation Wyderka family ownership lineage since the 1925 founding by Al Heiden and Stan Wyderka (with Stan’s son Ken Wyderka purchasing the business in 1972 and the current third-generation Wyderka family involvement continuing operations) and Plumbers Local Union 75 affiliation secure a Walker’s Point Milwaukee proper base supporting service across 36+ Milwaukee Metro municipalities. C.P. Conway Plumbing’s three-generation Conway family lineage from C.P. Conway’s 1929 plumbing diploma through 1960 incorporation through Richard Conway’s 1976 second-generation transition through Rick Conway’s 2005 third-generation transition supports a West Allis base serving the greater Milwaukee area and Waukesha region under current Wisconsin Master Plumber credentialing. The credential portfolios scale with operating depth: Seider’s triple-trade master credentials across heating, plumbing, and electrical, Heiden’s Local 75 union affiliation, Tim’s Plumbing’s five-generation master plumber lineage, and C.P. Conway’s three-generation master plumber credential continuity together provide the four-firm comparison framework that Milwaukee Metro residential customers use to select between long-tenured independent local operators outside the has absorbed several Wisconsin home-services brands across recent years..

Selection Methodology

Selection follows four criteria. First, continuous family ownership or founder-operator continuity outside the national rollup pattern. Second, verifiable WI Master Plumber license cross-checked via the Wisconsin Department of Safety and Professional Services (DSPS) Plumbing Program public lookup. Third, BBB Accreditation or equivalent third-party rating. Fourth, minimum 10-year continuous operating tenure with documented Milwaukee, WI 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 a Milwaukee, WI plumber’s license?

Use the Wisconsin Department of Safety and Professional Services (DSPS) Plumbing Program public licensee database at dsps.wi.gov. Search by license number or business name. Confirm active status, classification, bonding, and insurance before authorizing work.

What credentials should a Milwaukee, WI plumber hold?

At minimum: WI Master Plumber credential plus general liability insurance and workers’ compensation coverage. Specialty work (gas line, backflow prevention, fire sprinkler, sewer lateral) requires additional credential layers.

How can I tell if a Milwaukee, WI 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 Milwaukee?

Burst pipes, sewer backups, gas leaks, no-water events, and water heater failures 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 Wisconsin Department of Safety and Professional Services (DSPS) Plumbing Program public lookup before authorizing work. Information current as of the date below; firm details may change without notice. Last updated: 2026-05-10.