What Portzen Construction does

Portzen Construction, Inc. is a private, family-owned general contractor founded in 1983 by Mike Portzen and incorporated in May 1989. The firm is headquartered in Dubuque, Iowa, and is self-described as the largest union contractor in the Dubuque area. It serves commercial, industrial, institutional, and public-sector clients across most of Iowa and Southwestern Wisconsin, with project types spanning schools and university buildings, hospitals, water and wastewater treatment facilities, municipal swimming pools, flood mitigation infrastructure, and commercial developments. The business is led by Mike Portzen (Chairman), JR Portzen (President), Adam Portzen (Vice President), and Jayme Kluesner (CFO), with no external institutional ownership identified.

The company's core offering is general contracting delivered through four self-performed service divisions: General Contracting (construction management, design-build, carpentry, drywall, Duro-Last roofing), Excavating (demolition, utilities, building and site excavation), Concrete (flatwork, structural concrete, paving, tilt-up panels), and a plumbing and heating division operating under the d/b/a name Dubuque Plumbing & Heating (plumbing, hydronic heating, medical gas piping, process piping). Self-performance across multiple trades is positioned as the primary value proposition, allowing schedule control, quality assurance, and reduced subcontractor dependency relative to peers who sub out these scopes. The firm does not disclose proprietary technology, software platforms, or digital tools; its differentiators are operational and relational rather than technology-based.

Revenue is generated through project-based competitive bidding on public tenders and direct negotiation with private clients, with no recurring or subscription pricing. Marketing is limited to a website portfolio, client testimonials, Facebook presence, and trade-association participation; there is no evidence of digital marketing, content marketing, or formal demand-generation programs. The firm maintains relationships with multiple labor unions (Operators Local 234, Plumbers Local 125, Teamsters Local 120, LIUNA, North Central States Regional Council of Carpenters) and industry associations (Associated General Contractors of America, Iowa Concrete Paving Association, Master Builders of Iowa) that underpin labor access and bid eligibility. The website shows an active project pipeline and current hiring, indicating ongoing operations as of the most recent available data.

Name

Portzen Construction

Legal name

Portzen Construction, Inc

Website

https://pci-dbq.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

Portzen Construction is a family-owned general contractor and the largest union contractor in the Dubuque, Iowa area, self-performing concrete, excavating, carpentry, and plumbing/heating work for commercial, industrial, municipal, and institutional clients across Iowa and Southwestern Wisconsin.

Ownership category

akta.pro rank

Product category

General Contracting and Commercial Construction Services

NAICS

Nonresidential Building Construction (2362), Water and Sewer Line and Related Structures Construction (237110), Poured Concrete Foundation and Structure Contractors (23811), Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Heavy Construction Other Than Bldg Const - Contractors (1600), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE)

akta.pro secondary industries

Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE), Hydro BOP Civil & Water Conveyance (Dams, Spillways, Penstocks, Canals) (EUAMAFAG)

Keywords

• General contracting services
• Commercial construction
• Concrete construction
• Excavating services
• Design build construction

Headquarters

HQ city

Dubuque

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. General Contracting Services: Revenue from general contracting services including construction management and design-build delivery methods. Projects are typically won through competitive bidding for municipal, commercial, and industrial clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Portzen Construction is a general contractor that delivers commercial and industrial construction projects, self-performing work in concrete, excavating, carpentry, and plumbing/hydronics. The firm offers construction management and design-build delivery, with a separate plumbing and heating division operating as Dubuque Plumbing & Heating. Projects span schools, hospitals, water/wastewater facilities, swimming pools, and flood mitigation infrastructure across Iowa and Southwestern Wisconsin.

Product overview

Portzen Construction is a general contractor offering commercial and industrial construction services. The company operates four core service divisions: General Contracting (construction management, design-build, carpentry, roofing), Excavating (demolition, utilities, site work), Concrete (flatwork, structural, paving, tilt-up panels), and Plumbing & Heating (under the sub-brand Dubuque Plumbing & Heating for plumbing, hydronic heating, medical gas, and process piping). The company self-performs a significant portion of project work, positioning itself as a value-added partner for clients. Project types include schools/university buildings, hospitals, water/wastewater treatment facilities, swimming pools, and flood mitigation projects.

Differentiator

Problem solved

Functional benefit

Products and services

• General Contracting Full-service general contracting including construction management and design-build services for commercial and industrial clients. Self-performed field work covers rough carpentry, finish carpentry, framing, steel studs & drywall, and Duro-Last roofing.
• Excavating

Quantifiable outcome

• Thousands of projects completed in tri-state area
• +1 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Twelve partnerships are on record, tiered moderate, core and minor.

• Dubuque Area Chamber of CommercemoderateOthersLocal chamber of commerce membership providing networking opportunities, business advocacy, and community visibility for the construction company.
• Associated General Contractors of AmericacoreOthersNational trade association membership providing industry representation, advocacy, networking, training resources, and best practices for construction contractors.
• Iowa Concrete Paving AssociationcoreOthersState-level industry association for concrete contractors providing advocacy, technical resources, and industry networking specific to concrete paving.
• Master Builders of IowacoreOthersState construction industry association providing advocacy, education, and networking for commercial contractors in Iowa.
• Dubuque Area Labor-Management CouncilmoderateOthersLocal labor-management cooperation organization facilitating positive relations between union contractors and labor organizations.
• Dubuque Homebuilders & AssociatesminorOthersLocal homebuilder association for residential construction industry networking and advocacy.
• North Central States Regional Council of CarpenterscoreChannel Partner/ Reseller/ DistributorUnion partnership providing access to skilled carpentry workforce. Company is the largest union contractor in the Dubuque area with established labor relationships.
• Operators Local 234coreChannel Partner/ Reseller/ DistributorUnion labor partnership providing equipment operators for heavy construction and excavation work.
• Plumbers Local 125coreChannel Partner/ Reseller/ DistributorUnion labor partnership providing licensed plumbers for commercial and industrial plumbing work, including the company's Dubuque Plumbing & Heating division.
• Teamsters Local 120coreChannel Partner/ Reseller/ DistributorUnion labor partnership providing truck drivers and warehouse workers for construction logistics and materials handling.
• Laborer's International Union of North America (LIUNA)coreChannel Partner/ Reseller/ DistributorNational labor union affiliation providing skilled laborers for general construction, concrete, and excavation work.
• Greater Dubuque Development CorpmoderateOthersEconomic development organization focused on business attraction, retention, and expansion in the Dubuque area. Provides networking and development opportunities.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Mortenson Construction: National GC with strong Midwest presence across commercial, healthcare, and water/wastewater projects; comparable delivery model including construction management and design-build, and similar self-perform trade capabilities.
• Boldt Company: Wisconsin-based construction services firm with self-perform trades including carpentry, concrete, and steel erection; comparable to Portzen's vertically integrated trade model across industrial and institutional projects.
• Weitz Company: Des Moines-based general contractor with national reach in commercial, healthcare, and industrial construction; direct Iowa-headquartered peer with overlapping self-perform trades and similar design-build delivery model.
• McCarthy Building Companies: Large Midwestern-headquartered general contractor delivering commercial, healthcare, education, water, and industrial projects with self-perform capabilities — closely matching Portzen's vertical mix and self-perform philosophy, though at substantially greater scale.
• Miron Construction: Wisconsin-based general contractor serving the upper Midwest across education, healthcare, municipal, and industrial verticals — same regional corridor as Portzen with comparable self-perform concrete and carpentry capabilities.
• CD Smith Construction: Wisconsin-headquartered general contractor with self-perform concrete, carpentry, and pre-engineered building capabilities serving commercial, healthcare, and industrial clients — comparable mid-size Midwest GC profile.
• Kraus-Anderson Construction: Regional Midwest general contractor headquartered in Minneapolis serving healthcare, education, commercial, and municipal clients — closely overlapping with Portzen's Iowa/Wisconsin service area and vertical mix.
• J.H. Findorff & Son: Wisconsin-based commercial general contractor serving education, healthcare, and corporate clients; overlapping geographic reach and project types with Portzen, including self-performed concrete and carpentry work.
• Vogel Brothers Building Co. Wisconsin-based general contractor providing construction management, design-build, and self-performed concrete and carpentry across commercial and institutional clients — directly comparable in size, region, and service mix.

Broad incumbents

• Gilbane Building Company: Large national general contractor with Midwest presence serving education, healthcare, and municipal clients; overlaps with Portzen's verticals but operates at significantly greater scale and geographic breadth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Portzen-Construction-Inc-243384352415931

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Portzen Construction