O'Keefe Built
“We are thrilled with the patio and have been loving spending time in our new outdoor space and look forward to many more years of enjoying our outdoor space.”
Best General Contractors in Longmont, CO
24 companies listed · 23 in Longmont · 6 open weekends · 19 rated 4.5+
Data verified October 27, 2026
Mountain View Landscaping & Concrete
“The project involved removal of existing retaining wall, building a new block retaining wall, installing a stamped and colored concrete patio and outdoor space.”
Baker Builders
“From start to finish - everyone - employees and sub-contractors were extremely helpful and courteous - David, Travis and Jay kept the project on schedule!”
Construction Concepts Inc
“Great people!”
Golden Triangle Construction
“We have been working with GTC for a number of years.”
3model Construction
“Overall, the project from initial discussions to project wrap took about a year, with the actual remodeling work taking about five months (and we appreciated him staying late to meet deadlines before the holidays).”
Listed for homeowners in and around Longmont, CO, these 24 companies take on multi-trade work, from a single addition to a whole-floor renovation. What each one says about licensing, hours and the work it takes on comes from its own website; ratings and quotes come from public reviews.
Area overview: Longmont, CO
Of the 24 companies we list here, 23 are in Longmont itself and 1 comes from Redlands, CA (787 mi). 23 of the companies on this page have a rating, from 4.0 to 5.0 across 333 reviews; 1 has 50 or more reviews and 19 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (90%), responsiveness (89%) and quality (83%). The topics that come up most in reviews of the companies on this page are "communication" and "price". 6 are open on Saturdays and 1 on Sundays. 5 have a BBB rating of A or A+. Domain records put 17 websites of the companies on this page at ten or more years old; the oldest dates from 2000. 1 offers financing or payment plans; 8 give free estimates and 2 are family- or locally-owned. We have a website on file for all 24 of the companies on this page; 22 publish a contact page; 17 list a public email and 1 takes bookings online. 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.
Why do some of these firms sit outside Longmont?
Only 23 of the 24 companies here are based in Longmont. The rest come from other towns within 790 mi. Crews travel to the work, so the office address matters less than whether they will send the same people every morning and what travel time does to the price.
NG Companies
“Extremely efficient and professional company, as a former employee of more than four years I can say that they are truly a stand up team focused on safety, success and providing the greatest value possible for their customers.”
Brady Landscaping & Construction
“Mark designed two gorgeous dry creekbeds in our front yard, flanked on each side with decomposed granite and a diverse collection of water-wise plants compatible with our local climate.”
KCI
“We now have a beautiful church, made by good people.”
LSE Builders Group
“The hardest part of a real estate transaction in the current market is getting 1 contractor who does it all and who will diligently make the time for us within our deadlines.”
Environmental Systems Design
“Paul is very professional !”
BC Home Services
“This company is very professional and a very well done job as well as pricing is very affordable, I'm very happy with this work done I absolutely recommend this company!”
JWL Associates
“This eventually led to refreshing our entire first floor with new tile for the entryway, consistent paint throughout, and painting the wood tone cabinets in our family room.”
Quality Renovations & Roofing
“Brian was there from the monent we bought our house in Longmont to to after we moved away, taking care of the foundation, the roof and everything in between.”
N Line Electric
“They repaired my fallen masthead AND got Xcel to restore my power in the same day.”
Bedrock Granite LLC
“On left leg tattoos of ivy .”
2Q Homes
“Brad does luxury construction and runs an amazing company he also employs our company Vue Clean to help on His Construction cleanups, would definitely recommend, thanks Brad .”
Murphy Construction Services
“They did our kitchen remodel that turned into scope creep with bathroom updates, stairway update, pantry update, general house electrical updates and other odds and ends.”
Asphalt Roadways & Parking Lots Inc
Westec Construction Management
“Westec has been there for us when emergency maintenance issues arrive as well, and have performed many smaller type jobs of upgrading equipment, plumbing upgrades, and soil issues.”
ABC Kitchen and Bath
“Although we used our own builder, he and Lisa were always prompt and patient in answering our many questions and their sense of style and design gave us a beautiful, functional kitchen.”
Living Stones Construction Management
“This was such a smooth, easy transaction with an incredible outcome.”
Built. Construction
“They take pride in their work and are great to work with.”
GR Concrete Construction LLP
“My husband is an employee”
Why these companies made our list
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