GJ Koeppen Construction LLC website

GJ Koeppen Construction LLC

7845 Lookout Road, Longmont, CO, 80503

5.0
14 Google reviews
Website gjkconstruction.comVisit website +1 720-378-7660Tap to call

“After researching several companies and bids, we're glad we…”

Natalie Hilsenbeck ·
Visit website

Overview.

Koeppen Construction helps homeowners plan home remodels in Lafayette, CO, with kitchen updates, basement finishing, home additions, and full renovations tailored to comfort, function, and value. From layout changes and custom finishes to code-conscious construction and clear project communication, the team brings practical craftsmanship to every stage. Whether your home feels outdated, cramped, or ready for a major upgrade, get support from experienced contractors. Contact the team today to start planning a space that fits your lifestyle with more confidence.

2026Listed since
Longmont, COLocation
5.0Google rating
4Photos

Amenities.

  • Offers Online Estimates
  • Onsite Services Provided

Reviews.

5.0 · 14 on Google
October 2, 2026

“After researching several companies and bids, we're glad we chose Koeppen Construction for our basement refinish project. Graham Koeppen personally came to our home several times to evaluate the space…”

NH
Natalie HilsenbeckGoogle review
July 17, 2026

“We used Koeppen Construction for a roughly 3-month remodel of our entire first level — kitchen, powder room, fireplace, flooring, stairs, and more — and highly recommend them. The design…”

CB
Christian Bruun MadsenGoogle review
April 22, 2026

“Good people, great work. Koeppen Construction is the kind of company you actually enjoy working with. Everyone on the team is professional, easy to communicate with, and genuinely cares about…”

LH
Lily HooperGoogle review
April 21, 2026

“Koeppen Construction is the kind of company that’s genuinely hard to find these days. Every person on their team operates with honesty and integrity, and it’s clearly a core part…”

HB
Haylee BrauerGoogle review
January 21, 2026

“I’m happy to write this review of work recently done by Koeppen Construction at my home. I had asked the company to convert a window in my living room into…”

NE
Nancy EhrenreichGoogle review

Location.

Getting here

7845 Lookout Road, Longmont, CO, 80503

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