What types of projects does Cosman Construction handle?

We work across the full range of residential construction — design-build, home additions, interior and exterior remodeling, outdoor living spaces, and design refresh updates. The common thread isn't project type, it's project quality. If your project requires real coordination and a builder who'll still be reachable six months after completion, we're likely a strong match.

How does the design-build process work, and what does it cost to get started?

The initial consultation with Alex is completely free. We use that time to understand your goals, walk your space, and figure out if we're aligned before talking numbers. If we move forward, we produce real drawings, a written scope, and a detailed estimate — not a per-square-foot guess. No deposits taken.

How long does a typical remodel or addition take?

Timelines depend on scope, and any contractor who quotes a duration before understanding your project is guessing. What we commit to is a realistic schedule with clear milestones and proactive communication when anything changes. A design refresh can move in weeks. A full addition typically runs several months.

Do you work with property managers and investment property owners?

Yes, and the priorities are different. Downtime on an investment property is a direct cost, and we manage those projects accordingly — defined scopes, tight schedules, one point of contact who knows the full picture. Property management companies across Boulder County rely on us because we treat their timelines seriously.

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Boutique Design Build in Boulder, CO

The General Contractor in Boulder, CO Homeowners Call When The Work Matters

Boutique residential construction focused on remodels, additions, outdoor living spaces, and complex home improvements throughout Boulder County.

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About Cosman Construction

Cosman Construction is a boutique design-build firm led by Alex Cosman, serving homeowners, property owners, and property management companies across Boulder County who want a contractor they can actually trust with their home.

We specialize in design-build projects, home additions, interior remodeling, exterior remodeling, outdoor living spaces, and design refresh services — and we've built everything from single-room remodels to full second-story additions without ever changing how we approach the work.

We sit down with you, learn how you use your home, and build accordingly. No pressure, no vague timelines — just honest process and solid results across Boulder County and the surrounding Front Range.

When you're ready, schedule a conversation with Alex. No obligation, just a chance to talk through your project.

Our Services

Design Build in Boulder - Cosman Construction

Planning Is Where Great Projects Begin

Step 1: Consultation & Design

Every project starts with a conversation with Alex — not a sales rep, not an estimator. From there we produce design drawings, a written scope, and a real estimate so you know exactly what the project costs before deciding whether to move forward.

Step 2: Project Begins

Once design is approved and permits are in hand, work begins on a defined schedule with phase milestones and target dates. Alex is reachable directly throughout, and if anything changes you hear about it before it becomes a problem.

Step 1: Project Completion

Alex walks every inch of the finished work against the original scope. Anything that doesn't meet standard gets corrected before the final walkthrough — not flagged during it. Permits closed, documentation handled. Done means done.

A note on the design phase: You're not locked into completing construction with us. If you take the design we've produced and work with another contractor for the build, that's completely your call. If you choose to move forward with us, the design fee is credited toward the project cost.

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The Cosman Construction Difference

Boulder County has no shortage of contractors. What's harder to find is a boutique builder — small enough to give every project genuine attention, experienced enough to handle complex work without flinching.

We keep our project load manageable so Alex stays on every job from start to finish. You'll get same-day responses, a bid built around the right materials, and a builder who shows up consistently until the work is done.

Boulder is a small market. Reputation travels. We build accordingly. We look forward to speaking with 303.775.6690

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