If you’re planning a renovation or new construction, one of the first questions that often comes up is also one we hear all the time:
Do I hire an interior designer, an architect, or a builder first?
If you’re unsure, you’re in very good company. This is one of the most common questions we’re asked, especially at the beginning of a project when there are a lot of moving pieces to consider. Each professional plays a different role. And the order you bring them on can shape how smooth the process feels, how clear your budget is, and how cohesive your home ultimately becomes.
At Milly & O’Malley Interiors, we walk clients through this decision every week. There’s no single “right” answer. That said, we’ve seen time and again that when the right people come on board at the right time, the process feels calmer, more intentional, and far less stressful.
Let’s walk through how each role fits — and help you figure out where it makes the most sense for your project to begin.
Interior Designer vs Architect: What’s the Difference?
Before deciding who comes first, it helps to understand what each professional truly owns.
What an Architect Does
An architect focuses on the structural and technical framework of a home. Their role typically includes:
- Structural design and exterior form
- Engineering coordination
- Code compliance and permitting
- Major layout changes and additions
- Custom home and large-scale renovation design
Architects ensure the home is structurally sound, buildable, and approved to move forward.
What an Interior Designer Does
An interior designer focuses on how the home functions and feels once it’s built. This includes:
- Space planning and everyday flow
- Cabinetry and millwork design
- Lighting layouts and layering
- Plumbing fixture and finish selections
- Flooring, tile, hardware, and material transitions
- Furnishings, styling, and final detailing
In new construction especially, an interior designer works alongside the architect. Together, they ensure the architecture supports real life — how your family cooks, gathers, hosts, unwinds, and moves through the home every day.
We often explain it this way:
Architecture creates the structure. Design shapes how it lives.
Both roles are essential. However, they serve very different purposes.
Where the Builder Fits In
A builder’s role is to execute the plans. They manage construction, coordinate trades, and bring drawings to life on site.
Builders are experts in how something gets built. Designers and architects help define what gets built — and why.
When a builder comes in before the vision, layout, and finishes are clearly defined, pricing often reflects assumptions rather than intention. As a result, budgets can drift and change orders tend to appear.
Why We Often Recommend a Design-Led Approach
When clients decide to hire a designer before a builder or architect, they’re often thinking about aesthetics. What they don’t always realize is that early design involvement also protects the project as a whole.
Starting with a design-led approach allows you to:
- Clarify layout priorities before drawings are finalized
- Make meaningful flow changes early, not during construction
- Visualize cabinetry and plumbing before rough-ins begin
- Align lighting placement with actual fixture selections
- Establish finish direction before contractors price the work
When design leads, decisions feel intentional instead of reactive.
In our experience working throughout the Chicago suburbs, projects feel more cohesive and far less stressful when the team establishes the vision early. Builders can price accurately. Architects can draw with clarity. And everyone works from the same understanding from the start.
As a Chicago interior design firm serving St. Charles, Geneva, and the surrounding suburbs, we collaborate closely with architects and builders to create cohesive, design-led homes.
Already Have a Builder or Architect? That’s Completely Fine.
It’s important to say this clearly: there’s no wrong place to start.
Many of our clients come to us after they’ve already selected a builder or architect. We’re always happy to come on board at that stage. In practice, we regularly step into projects mid-process, collaborate closely with existing teams, and help bring cohesion and clarity to what’s already underway.
If you don’t have a builder or architect yet, we’re just as comfortable helping there too. One of the benefits of working with a full-service interior design firm is access to trusted professionals we collaborate with regularly. These are teams who share our values, communication style, and attention to detail. When the designer, builder, and architect align from the beginning, the process tends to feel smoother, more efficient, and far less stressful.
For that reason, our goal is never to take over — it’s to partner. Whether we’re joining an established team or helping assemble one, we focus on creating a seamless, well-coordinated experience where everyone works toward the same vision.
So… Who Comes First?
Rather than a hard rule, this decision really comes down to clarity — and to matching the order to the scope of your project.
For renovations or additions, we often find the smoothest path starts with a designer-led approach, followed by an architect and builder as needed. This allows layout, flow, and finishes to be thoughtfully considered before plans are finalized.
For new construction, the process typically begins with an architect. From there, the interior designer joins early alongside them, and the builder comes on once the vision and plans are clearly defined.
In both cases, the goal remains the same: early alignment. When the team defines the vision upfront, every professional can do their best work, and the process feels far less reactive.
What This Really Comes Down To
Hiring an interior designer isn’t just about choosing finishes.
At its core, it’s about thinking holistically — about how your home functions day to day, how spaces connect, and how hundreds of small decisions work together to support real life. It’s about creating a home that feels intentional, layered, and designed to evolve with you over time.
That level of cohesion doesn’t happen by accident. Instead, it comes from thoughtful, collaborative planning from the beginning.
A Final Note on Working Together
Whether you’re just starting out, already working with a builder or architect, or somewhere in between, we’re happy to meet you where you are.
We regularly join projects already in progress. In those cases, we collaborate closely with existing teams to bring clarity and cohesion to what’s underway. And if you haven’t assembled your team yet, we’re equally comfortable helping connect you with trusted professionals we love working with. This creates a seamless, aligned partnership from the start.
As a full-service interior design studio, our role is to support the entire process holistically — from early planning and layout decisions to finishes, furnishings, and final details. Above all, we aim to be a steady, thoughtful partner along the way.
Ready to Move Forward?
If you’re planning a renovation or new construction and wondering how to assemble the right team, we’d love to talk.
Whether you’re in the earliest planning stages or reviewing drawings, we’re here to help you move forward with clarity, confidence, and a design-led approach that supports how you actually live.
