O'Keefe Built
“We wanted a classy deck with some height and warmth (good materials and quality railings) to make the yard stand out, and give us an organization point to finish putting in shrubs and trees.”
Best Architects in Longmont, CO
24 firms listed · 7 in Longmont · 21 rated 4.5+
Data verified October 27, 2026
F9 Productions Inc.
“The biggest thing I'd emphasize to potential clients is that F9 feels a lot more like a "product" business than a "services" business -- they're fantastic if you like their style and leave the whole project in their hands.”
Waugh & Associates
“Those are tattoos on my daughter and she had legs at memorial.”
Wayne Brungard Architectural
Properties BUY Design
R L Morton & Associates PC
Listed for property owners in and around Longmont, CO, these 24 firms take architectural work. The project types each one handles, the stages of service it offers and any license it names are drawn from its own website, next to ratings and quotes from public reviews.
Area overview: Longmont, CO
7 of the 24 firms we list are based in Longmont; the other 17 serve Longmont from Boulder (13 mi) and Lafayette (13 mi). 22 of the firms on this page have a rating, from 4.3 to 5.0 across 377 reviews; 3 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these firms on specific qualities, they most often praise professionalism (92%), quality (90%) and responsiveness (90%). 7 have a BBB rating of A or A+. 21 have ten or more years of experience, the longest 55 years. 1 offers financing or payment plans and 1 gives free estimates. We have a website on file for all 24 of the firms on this page; 18 publish a contact page; 13 list a public email and 3 take bookings online. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book.
What can an architect's website tell me?
All 24 firms here list a website, and it is worth more than a phone call at first. Look for completed buildings rather than renderings, for projects of your size and budget, and for the same climate and code environment. A practice that does civic work may not want a rear addition.
Gary Kerr
Rodwin Architecture
“We had a great experience with this firm -- the design was more than we could have hoped for and the professionalism, thorough research and delivery was flawless.”
Melton Design Build
“They always try to balance client desires with client budgets and have really gone the extra mile to work with local building code design requirements and to come up with creative design options to blend code necessities with client needs.”
Fanas Architecture
“If you look along the front range, you'll find some of the most breathtaking homes designed by Dale.”
DTJ Design
“Good food”
Fuentesdesign
Arcadea Architecture
“We were thinking of going with a design/build firm but David was able to coordinate for a great contractor at a better design/build price than any other option.”
Caddis Collaborative
“Combined with their impressive building science knowledge and ability to deliver PHIUS energy modelling and certification, Caddis brought an incredibly skilled, thoughtful, and dedicated team to our project that helped the design work express our cor...”
Mosaic Architects & Interiors
“Aside from being kind, intelligent, and all-around wonderful people, their attention to detail and the forethought they bring to projects is unsurpassed.”
Coburn
“Coburn is one of the most responsive landlords and is always quick to jump on any issue in our building!”
HMH Architecture + Interiors
“He has gone above and beyond on every project often doing extra work on his own time to make sure I was taken care of, treated fairly and things were done right.”
Gettliffe Architecture
“As a high end construction company, our experience with Gettliffe Architecture has been one of close collaboration, resulting in the highest quality architectural detailing for our clients.”
Sopher Sparn Architects
“Now that the house is built, we really appreciate the subtle design aspects – the layout is perfect for our family, the design captures mountain and plains views better than we could have imagined, and the feel of the whole house is a perfect fit for...”
JKA Design LLC
“Jeff is an incredible architect and I would recommend his to anyone!”
Tectonic Design Build
“What made the difference was that we always knew what was going on, why a delay might be happening, and when something went wrong, that there was a path to fix it.”
Tumu Studio
“For the aesthetic feel, working with them in mood boards and communicating in the abstract language of artists through intangibles such as mood and vibe -- and finding ways to make that tangible -- was creatively thrilling and Huili and Ross made it ...”
Urban-Gro
“Their ability to coordinate multi-disciplinary meetings and bring a team oriented approach to the project made our Mississippi facility a resounding success.”
M Gerwing Architects
“Mark is an artist at heart, and he knows how to take risks, push comfort zones, raise questions and offer concepts that yield unexpected, elegant, and delightful results.”
Why these companies made our list
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