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Self-Perform Construction

More than contract managers, we’re true builders

Welder at work with sparks coming off weld site

More control, safer jobsites, higher quality through self-perform work

Predictable schedules. Safer jobsites. Higher quality. In today’s fast-paced world, you need construction performance that delivers to higher standards. You need to maximize control over how your construction projects unfold, with a respected self-performing contractor that can ensure adequate labor resources to deliver speed to market and consistent quality, without sacrificing safety. 

A legacy of self-perform construction expertise, 130+ years strong

Since Martin Boldt started his carpentry shop in 1889, the Boldt name has been synonymous with craftsmanship and quality. Today we’re proud to continue that tradition as a leading self-perform construction company, with nearly 2,000 union tradespeople nationwide across a range of disciplines.

Concrete Pour at Aurora Medical Center - Grafton

Concrete services

Concrete foundations and flatwork are critical to the success of any project. Boldt’s ACI (American Concrete Institute) trained and certified professionals manage concrete scope to ensure timelines are met, while providing the highest level of quality and safety. Boldt offers mass concrete foundations and bases, footings, foundation walls, slabs-on-grade, slabs-on-deck, structural concrete, sidewalks, curb and gutter and more. You can count on Boldt’s in-house layout capabilities to ensure your project is delivered efficiently and effectively before you break ground.

structural pre-cast erection

Boldt is a PCI (Precast Concrete Institute) certified erecting company that has been erecting structural precast jobs for the last 40 years. Boldt’s precast experience spans a variety of markets, including Industrial, Commercial, Education and Justice. Count on Boldt for quality and uniformity for building foundations and concrete wall structures.

County Garage Precast Concrete Installation - Sheboygan County
Boldt masonry worker holding cement brick

Masonry Services

Boldt is a leading masonry construction company with highly skilled, union-trained cement masons and bricklayers nationwide. Whether you’re building new, expanding or replacing your existing structure, we can offer masonry services like new brick, stone, precast, block / Concrete Masonry Unit (CMU) and veneer masonry, as well as concrete flatwork and foundations, to improve your building’s performance. To extend the life of your existing building, our experts can assess current conditions, then tuckpoint, repair and replace weathered masonry to keep your facility protected against the elements and looking its best.

Steel Services

Structural steel framing and concrete steel reinforcement are the backbone of most commercial construction projects. They’re also often one of the largest bid packages on a project—and more prone to supply chain disruptions in steel procurement. Boldt is an AISC (American Institute of Steel Construction) certified steel erector. When you use Boldt union ironworkers to self-perform this key trade, instead of subcontracting to another steel construction company, you can better control costs and guarantee this critical construction piece is in place and on time, to keep construction moving.

steel beam infrastructure

Rough and Finish Carpentry and framing

Our company was founded on one man’s reputation for extraordinary carpentry construction. Even as we’ve grown far beyond a carpentry construction company, carpentry craftsmanship remains a core part of Boldt. We provide both rough carpentry—framing, studs and basic construction—and finish carpentry, for high-end millwork, casework, molding and more.

Millwright Services

In-house hoisting/rigging, installation, alignment, leveling and maintenance and repair services — Boldt offers millwright services for even the largest, most complex equipment. That’s part of the reason we’re one of the nation’s largest industrial contractors. Combined with Boldt Technical Services’ engineering and planning services, our millwright construction services provide exceptional value to our manufacturing, food and beverage and power and energy construction clients.

two employees working together with forklift
welder working on a piece of equipment

Boilermaker Services

Our boilermakers are expert welders and riggers who fabricate, install and repair boilers, chillers and other large containers for holding liquids and gases. As a self-perform boilermaker construction firm, Boldt provides excellent value for clients with complex systems in heavy industrial environments such as power generation facilities, chemical plants, steel mills, mines, refineries and paper mills.

Self Perform Construction crew pouring concrete

More control. More certainty. Better quality. All with a self-perform construction company that builds boldly.

When your partner can deliver extensive self-perform construction capabilities, you get incredible project value. Schedule and budget control. Consistent high quality. An industry-leading safety program that has delivered more than 5 million people-hours without a lost-time incident. As a true, self-perform construction company, even when Boldt doesn’t perform these trades, our expertise helps us better manage subcontractors and mitigate project risk.

Bringing a Lean mindset and master builder’s skillset to self-perform work

Your vision achieved at a higher standard of quality. That’s what to expect with Boldt, a self-performing contractor built to deliver facilities that perform better.

group of 5 people icons from the chest up

~2,000 skilled tradespeople nationwide

Safety Vest

Industry-leading safety program

spinning gears icon

Built-In Quality program proven to reduce rework


Comprehensive millwright services


More than $60 million in owned equipment

Ready for a self-perform construction company that builds boldly? Let’s talk.