Eagan Building Group is a design-build general contractor based in Washington, Missouri, serving industrial and commercial owners across the St. Louis metro region and beyond. Tim Eagan founded the company in 2008 with a simple belief: construction should feel predictable, transparent, and rooted in real partnership with the people who hire us. Nearly two decades later, that belief still drives how we plan, price, and build every project.
We take on projects ranging from $50,000 to $25,000,000 across manufacturing and industrial facilities, corporate and professional offices, healthcare and wellness spaces, retail, hospitality, non-profit, and institutional work. Ground-up construction, renovations (including tenant improvements), and building additions. More important than the list of what we build, though, is the way we build it.
What Design+Build Actually Means
Design+Build is a construction delivery method where one team is responsible for both the design and the construction of your project, under a single contract. Instead of hiring an architect, sending those drawings out for bid, and hoping the numbers come back close to your budget, you bring in one accountable partner from the very first conversation.
At Eagan, that means our team sits shoulder to shoulder with you, the designers, and our trade partners from day one. We coordinate scope, schedule, and cost together, not in sequence. The result is a plan that is already pressure tested by the people who have to build it.
This is not a newer, trendier process. Design+Build is one of the oldest delivery models in construction, the way master builders have worked for centuries. What is newer is how efficient modern Design+Build has become when it is paired with rigorous preconstruction, live budgeting tools, and transparent project management software like our UDA ConstructionOnline platform, which gives owners real-time visibility into daily logs, progress photos, submittals, schedules, and change orders.
Why Design+Build Works Better for Our Clients
Most construction frustration comes from a gap somewhere: a gap between design and cost, a gap between what was drawn and what can actually be built, a gap between the people who made the promises and the people doing the work. Design+Build closes those gaps because there is one team and one contract. That creates a handful of practical advantages we see on every project:
One point of accountability. When something needs to move, there is no finger pointing between designer and builder. We own the outcome.
Budget clarity early. We build a detailed preliminary budget targeting within plus or minus 10 percent, so you can make informed decisions before anything is locked in.
Fewer change orders. When the people pricing the work are the same people designing it, most of the painful surprises get caught on paper, not in the field.
Smarter value engineering. If trimming cost becomes necessary, we already know which elements protect your operation and which ones are safe to adjust.
Faster, more predictable schedules. Design and construction phases can overlap intelligently. Long-lead items get ordered early. Permitting and mobilization flow without the handoff lag of traditional delivery.
Design+Build is not magic. It is a disciplined, 10-step process we apply consistently to new construction, renovations, and expansions. The method is proven. The execution is ours.
Why Relationships Matter Just as Much as the Method
Here is the part that does not fit neatly on a capabilities sheet. No delivery method, no matter how efficient, produces good buildings without good relationships behind it.
Our clients are not transactions. They are business owners, facility managers, and leadership teams investing real capital in a space their people will work in for the next twenty years. Our job is to understand that space the way they do: how it has to function on a Monday morning, what it has to hold up to over a decade of operations, and what quiet details will make it easier to run. That understanding only comes from listening first and estimating second.
We also believe the builder who finishes your project should be the builder you call the next time something needs to move, expand, or refresh. Many of our clients come back for a second, third, and fourth project. Those repeat relationships are the clearest evidence that our process works, because you only bring a builder back if the first experience was honest from start to finish.
Why Our Partners Matter Just as Much as Our Clients
The other side of the relationship equation is the people we build alongside: the architects and engineers we collaborate with, the trade contractors in the field, and the suppliers moving steel, concrete, and equipment on and off our jobsites. These partnerships are not one-off bids. They are long-running relationships we have invested in for years.
That investment pays off for our clients in two specific ways. First, competitive pricing. Our trade partners want to work with us because we treat them fairly, pay them on time, and run organized jobsites, so we consistently get strong pricing and priority scheduling. Second, quality control. When the same electrical contractor has wired a dozen of our buildings, they already know our standards, our documentation, and our expectations for safety. That discipline is part of why we have had zero safety citations or penalties in the last three years.
Good relationships with the people swinging hammers translate directly into better buildings for the people paying for them. It is that simple.
What This Looks Like on Real Projects
Three previous projects show how Design+Build and strong partnerships play out on the ground:
Tri-National, Inc., St. Charles, Missouri. A 30,000 square foot interior office renovation paired with a 60,000 square foot parking lot reconstruction, with a construction cost of approximately $3 million. Two very different scopes of work, one team coordinating them so business operations and site improvements stayed aligned from start to finish.
Sunrise Salt Cave, Ballwin, Missouri. After a fire forced a full gut of the building, we helped the owners reimagine what had been a spa and massage business into a renewed wellness destination built around salt halotherapy and massage treatments. The finished space includes illuminated Himalayan salt brick panels, an LED bubble wall, and a complete interior and exterior renovation. This project is a clear example of what happens when builder, designer, and owner share the same table early and stay there through every decision.
Clearent, LLC, Creve Coeur, Missouri. A 28,000 square foot interior renovation of the company’s headquarters, covering conference rooms, break rooms, a game room, the lobby, private offices, open seating areas, and storage. A full-function corporate environment built around how the Clearent team actually works day to day.
Different industries, different scopes, different square footages. Same method, same team, same standards.
Start the Conversation Early
If you are considering a new building, a renovation, an expansion, or even a property acquisition that might someday become a project, the best thing you can do is start the conversation early. That is why we offer a no-cost, no-obligation Before the Build meeting. It is an early-stage planning conversation designed to give you a clearer understanding of your project direction, insight into key cost and timeline factors, and a trusted construction partner for whenever the timing is right. You do not need to have drawings. You do not need to have a site. You just need a question you would like a thoughtful answer to.
Ready to talk about your project? We would love to hear what you are planning.
