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Top-Rated Architects/engineers in Longmont - Updated Nov 2026

Medeiros Architectural Group, Inc.
4.9(
17
)
Draftsperson/CADDArchitectArchitect - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2004

Free estimates

Customers say: True professional

"I enjoyed our first meeting—in which Chuck asked good questions and listened closely to my answers—and after seeing the early sketches I decided to go ahead with the project. Chuck began by exploring the existing house, making measurements, studying details, and doing numerous sketches. His enthusiasm for the project was encouraging. We collaborated frequently as he developed detailed plans and had them professionally reviewed. The plans moved easily through the permitting process, and they impressed the contractor and his subs once work began: I heard many times that the architect’s drawings and notes were more clear and complete than those they are used to working with. Chuck stayed involved throughout the project, helping me make decisions and offering creative solutions to the small difficulties that arose."
Response time1 day
1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for ISTA Engineers
ISTA Engineers
4.7(
31
)
Engineer - Structural

Serving Longmont, CO and surrounding areas

Approved

In business since 2008

Free estimates

Offers commercial services

"Pedram arrived at the time that he promised and was thorough with his assessment. Addressing the issues but also looking at all the evidence or information available to make a decision. I recommend him as a solid engineer, capable in this field of work."
Remodeling Project
Dumfries Project
Removing Bar Walls
Response time9 hrs
Response rate88%
Recommended by96%of homeowners
Avatar for Design Exteriors LLC
Design Exteriors LLC
4.8(
130
)
Architect - LandscapeArchitect - Landscape - For Business

Serving Longmont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Warranties offered

"Cedric and Design Exteriors did a fabulous job designing and creating my new backyard space. I found them easy to work with, especially given my budget. I have a plan for when I can do more and still have a wonderful backyard to enjoy now."
WOW!! Look at those gorgeous curves! We call them #ShoebridgeCircles
Dinner al fresco right in your own backyard! Give your family a reason to put down their phones and turn off their screens.
Restaurants WISH they could be this awesome.
When we saw this gorgeous tree, we knew we had to plan for it in the design.  We took it into account when we designed the roof of the pavilion and even thought it through when we poured the concrete for the patios.
Tough day at work? Come home to this.

+208

Response time7 hrs
Response rate100%
2 neighbors recently requested a quote
TAS Engineering, LLC
4.7(
50
)
Engineer - Structural

Serving Longmont, CO and surrounding areas

Approved

In business since 2011

Emergency services offered

Customers say: True professional

"Tom at TAS Engineering was professional, friendly, helpful, patient and highly competent and efficient. He did the assessment of my attic structural issue and identified the simplest and most cost-effective solution. He ensured that my contractor did the work to his specifications and provided the certified engineering letter that all had been addressed properly. This was exactly what I needed. I would highly recommend him and would hire him again."
Response time2 hrs
Recommended by97%of homeowners
Avatar for Rock N Block- Turf N Hardscapes
Rock N Block- Turf N Hardscapes
4.9(
33
)
Architect - LandscapeArchitect - Landscape - For Business

Serving Longmont, CO and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2017

Free estimates

Warranties offered

"I was very happy with my experience with Rock N Block from start to finish. Paul helped with my design phase, and was very communicative throughout the process the installation team was quick and did a wonderful job."
Backyard Turf Installation
Landscape Design
Frontyard Full Makeover
Backyard Turf Installation
Additional Photos

+60

21 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Maliakai Architectural Design
Maliakai Architectural Design
5.0(
6
)
Architect

Serving Longmont, CO and surrounding areas

Approved

In business since 2005

Free estimates

Offers commercial services

"Marc is an incredible architect and was instrumental in getting our project back on track with the City of Denver. He was always available to answer our questions, brainstorm ideas, helped us navigate Denver building code, and provided some very strong guidance about the building and permitting process. He delivered our project/plans on time and on budget, including a super quick review and approval process with the city. Highly, highly recommend!"
Bright Tanks
Livign Room
Bar Seating
Cocktail Bar and Dining
New Exterior

+48

Response time12 hrs
Response rate96%
5 neighbors recently requested a quote
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