G A Escobar Associates Inc
“His fair and honest approach, providing candid assessments without unnecessary alarm, along with his detailed, accurate, and timely reports, consistently help clients make well-informed decisions.”
Best Civil, Structural and Environmental Engineers in Longmont, CO
24 companies listed · 10 in Longmont · 1 open weekends · 14 rated 4.5+
Data verified October 28, 2026
Zebulon Solutions
“If you have a new product or idea contact them!”
Civil Resources
Management and Engineering Services
“This is a friendly team who will be happy to work with you to get the job done.”
Intelliprop
“Outstanding (stable) high tech startup IP shop specializing in FPGA and storage solutions.”
GR Concrete Construction LLP
“Clean work and great quality, does not matter how big the job is they make sure the job is done right, definitely shows in their years of experience”
Listed for property owners in and around Longmont, CO, these 24 companies do engineering work for properties. Listings show the disciplines each firm names on its own website, from structural to civil site work and environmental assessment, with ratings and quotes from public reviews.
Area overview: Longmont, CO
10 of the 24 companies we list are based in Longmont; the other 14 serve Longmont from towns including Boulder (13 mi), Lafayette (13 mi) and Berthoud (9 mi). 21 of the companies on this page have a rating, from 4.0 to 5.0 across 106 reviews; 14 are rated 4.5 or higher. 1 is open on Saturdays. 3 have a BBB rating of A or A+. Domain records put 22 websites of the companies on this page at ten or more years old; the oldest dates from 1994. 1 offers remote or virtual consultations and 2 give free estimates. We have a website on file for all 24 of the companies on this page; 21 publish a contact page and 19 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
How do I tell which firm suits a house?
Websites are listed for all 24 firms on this page. Look at project types. A practice geared to municipal infrastructure or industrial plants may not want a beam job, while a small residential structural firm will turn it round faster and cheaper. Say the scope plainly on the first call.
Civilarts
“Excellent surveyors with experience in boundary and construction.”
Bowman
Creative Civil Solutions
Sugarloaf Tower Company
Advanced Engineering LLC
“But with the referral of trusted contractor and friend (expansive soils are a big problem in Fort Collins), we asked Jason Baker to do an engineering inspection just for peace of mind.”
Anthem Structural Engineers
“We enjoy working with them and they are clearly one of our preferred structural engineers.”
Gebau Consulting Structural Engineers
“I have completed 30 or so projects with Gebau Engineering, ranging from minor structural issues on remodels to larger commercial projects as well as so civil engineering projects.”
Wilkinson Engineering
“Saved us so much time in planning and designing our mountain dream home by answering all our questions about codes and requirements, and connecting us with the right people for every step.”
Atkinson-Noland & Associates
“I have well over 25 years of experience in every aspect of masonry and structural engineering from building 600 ft tall free standing brick scrubber stacks to glass furnaces and historical brick restoration.”
Ascent Group
“Their years of experience are evident in the high quality work that they produce, and the professionalism in which they handle every project we work on with them.”
Siteworks
“They are especially well versed in the City of Boulder and Boulder County and understand how to keep projects moving forward through entitlements and construction.”
Urban-Gro
“We became involved in our first project together 4 years ago and the thing that struck me about Sam was his willingness to share his knowledge and passion of the cannabis industry.”
Baseline Engineering Corporation
“We have worked with/for them on many projects, and the goal of success is always the prime objective.”
Dinatale Water Consultants
Apecs
On Site Structural Engineering LLC
“I interned with the engineers of On-Site for nearly two years, and in that time I worked with a brilliant group of guys who took on difficult structural problems in a timely and professional manner.”
Diagnostic & Consulting Services
“The are an excellent source for microscopic particulate analysis for evidence of surface water infiltration to the EPA standard.”
S2O Design and Engineering
“A professional, experienced and innovative design firm with a passion for river-based recreation and engineering.”
Why these companies made our list
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