Last updated on July 15th, 2025 at 11:33 pm
Our annual ranking of top construction firms highlights the top companies in Longmont based on their project volume over the past year, with a focus on relevance. This compilation is derived from permit and contractor information sourced from city, county, and state building departments through our partners at BuildZoom. For further information regarding data accuracy, please consult the note at the end of this article.
Construction data offers valuable insights that support many roles across the building industry. Suppliers and service companies can use this information to identify when general contractors are beginning new projects or expanding, allowing them to approach at the right moment with relevant offers. This kind of targeted outreach is made more effective by following construction trends and analyzing patterns through construction market data. Subcontractors also benefit by locating general contractors currently active in the field and reaching out for potential collaboration. At the same time, developers and property owners can rely on contractor history and construction activity details to evaluate the skill level and past performance of those they plan to hire. As the use of data analytics in construction industry practices continues to rise, staying informed through accurate and timely data is becoming a key part of success.
| Business | # Projects (’23) | Average Contract Value |
|---|---|---|
| Melton Design Build | 23 | $46K |
| Lyon Design/Build | 6 | $116K |
| Skycastle Construction | 5 | $39K |
| Build Old School LLC | 4 | $9K |
| Rosewood Construction, Inc | 4 | $48K |
Melton Design Build
Address:
3082 Sterling Cir., Boulder, CO 80301
Melton Design Build has been a leading force in the Boulder County construction industry, known for its award-winning architecture, design, and remodeling services. Since implementing its signature design-build process in 2003, the company has consistently delivered projects on time, on budget, and with high levels of client satisfaction. With decades of experience, Melton has earned a reputation for excellence in custom homes, commercial spaces, and residential remodels, all backed by a dedicated in-house team of skilled professionals. Their integrated approach brings together design and construction under one roof, offering clients a seamless experience with clear communication and a single point of accountability. Melton’s work has been recognized with numerous design and industry awards, including the prestigious Remodeling Magazine’s Big50 Award. As one of the few Energy Star certified general contractors in Colorado and the first in Boulder to earn Building Analyst Professional Certification, Melton remains committed to sustainable and energy-efficient building practices. The firm is also known for its deep community ties, contributing to local organizations and setting a high standard for socially responsible business. Every project reflects a dedication to craftsmanship, innovation, and personalized service tailored to meet each client’s vision. With a people-first philosophy and a passion for creating beautiful, functional spaces, Melton Design Build continues to set the benchmark for construction excellence in the region.
The Home Builder Digest team reviewed data provided by the City of Longmont Building Services Department to highlight projects completed by Melton Design Build. In 2023, the company completed a $952,730 single-family home that included an attached garage. In 2024, they worked on a $702,632 project to construct a new detached two-story residence that replaced an existing home and featured an attached garage on the lower level.
Lyon Design/Build
Address:
6700 Sunshine Canyon Dr, Boulder, CO 80302
Lyon Design/Build is a trusted remodeling contractor with over 30 years of experience transforming residential and commercial spaces throughout the region. Known for their expertise in kitchens, bathrooms, additions, structural work, and office renovations, the company brings both creativity and precision to every project. Lyon Design/Build offers full-service solutions, from planning and design to construction, and supports clients regardless of whether they have a clear vision or need guidance in shaping one. Their commitment to honesty, integrity, and continuous improvement has earned them a loyal client base and a reputation for delivering exceptional results. The company prioritizes clear communication and personalized service, ensuring that clients remain informed and comfortable throughout every stage of the project. Lyon Design/Build stands behind its workmanship with a two-year warranty, reinforcing their dedication to quality and long-term satisfaction. They are passionate about creative innovation, constantly updating their knowledge to stay ahead of evolving design trends and construction technologies. Whether working on a single bathroom or a major commercial renovation, the team remains focused on staying on time and on budget. Their customer-first approach and decades of hands-on experience make them a standout choice in the design-build industry.
Data obtained from the City of Longmont Building Services Department, as analyzed by the Home Builder Digest team, revealed Lyon Design/Build’s recent work. One project in 2024 involved a $63,862 conversion of an attic over a 1910 historic detached garage into an ADU with dormer enhancements. Another project that year was valued at $170,000 and included a family room addition, deck, and detached garage.
Skycastle Construction
Address:
929 Pearl St., Suite 250, Boulder, CO 80302
Skycastle Construction, established in 2001, is a Boulder-based design-build firm recognized for its unmatched expertise in green custom home construction. With over two decades of experience, the company has become a leader in sustainable residential design, delivering high-performance homes that reflect both environmental responsibility and architectural excellence. Skycastle’s long-standing relationships with local building departments, consultants, and engineers allow them to navigate Boulder County’s complex permitting and regulatory landscape with efficiency and confidence. Their strong reputation within the building community is a result of fair treatment of subcontractors and vendors, which consistently results in competitive pricing and top-tier craftsmanship. The team is known for its friendly and responsive service, clear communication, and unwavering business integrity. Skycastle’s process is particularly effective for clients who are not local during construction, offering a transparent and well-managed experience that eliminates uncertainty. Their deep focus on energy efficiency and local code compliance ensures every project meets the highest standards of sustainability. Clients regularly praise their ability to turn bold design visions into stunning, eco-conscious homes. With a commitment to quality and a proven track record, Skycastle continues to raise the bar for green building in Colorado.
The City of Longmont Building Services Department provided records that the Home Builder Digest team used to identify work done by Skycastle Construction. Their most significant 2023 project was a $2,300,000 new single-family home with an attached garage. In 2022, they completed a $100,000 detached garage project.
Build Old School LLC
Address:
7991 W. 28th St., Greeley, CO 80634
Build Old School LLC has been delivering high-quality remodeling and construction services across Northern Colorado since 2006, earning a reputation for craftsmanship, reliability, and personalized care. With over 17 years of industry experience, the company has transformed countless homes through expert kitchen, bathroom, and basement remodels, as well as roofing and water remediation services. Their team is known for blending timeless design with modern functionality, ensuring that each project enhances both the beauty and practicality of the space. Build Old School takes pride in offering expert interior design support, including complimentary consultations for larger projects, helping clients bring their vision to life with clarity and confidence. The company’s commitment to detail, quality materials, and open communication fosters strong relationships with homeowners and results in spaces that truly reflect individual lifestyles. Whether upgrading a single room or renovating an entire property, Build Old School delivers tailored solutions that stand the test of time. Their trusted process and customer-first approach have made them a preferred contractor in the region. Clients appreciate their ability to handle projects of all sizes with professionalism and creativity. With a deep-rooted mission to enhance environments and enrich lives, Build Old School continues to set the standard for excellence in home renovation.
Two garage addition projects by Build Old School LLC were found through data from the City of Longmont Building Services Department, reviewed by the Home Builder Digest team. One, completed in 2025, was a $62,256 attached addition totaling 960 square feet. The other, from 2024, was a $35,000 garage addition.
Rosewood Construction, Inc
Address:
2795 Pearl St., Suite 200, Boulder, CO 80301
Rosewood Construction, Inc., based in Boulder, Colorado, has been a trusted name in custom home building for over 45 years, delivering residences that combine luxury, functionality, and architectural integrity. Led by Dave Rose and Ryan Gilmour, the company is known for its hands-on management style, guiding clients through every phase of the building process from concept to completion. Rosewood’s long-standing, full-time staff ensures unmatched craftsmanship and consistency across projects, while their deep understanding of Boulder’s permitting and environmental regulations allows for efficient and compliant builds. The firm’s client-first philosophy is evident in its transparent communication, accurate cost analysis, and thoughtful project planning, which help make the construction journey clear and rewarding. Whether crafting a new home or managing a remodel, Rosewood focuses on precision, care, and lasting value in every detail. Their ability to seamlessly integrate design and construction has earned them a reputation for creating homes that feel both timeless and highly personalized. Known for turning visions into reality, Rosewood delivers spaces that are as beautiful as they are livable. With decades of proven success and a portfolio of inspired homes, they continue to be a leading force in Boulder’s residential construction landscape.
The Home Builder Digest team reviewed information from the City of Longmont Building Services Department to highlight recent work by Rosewood Construction, Inc. In 2023, the company completed a $45,000 detached garage. That same year, it also handled a $6,714 project involving a 101-square-foot addition and alterations to a 293-square-foot existing accessory garage.
Note: The data used to compile this list may not be complete based on the availability of permit data – collecting and consolidating this data is a time-intensive and difficult task. It may not be complete in all areas due to jurisdictional reporting requirements and the availability of data. Job values and permit fees should be taken as estimates rather than exact values, based on the most complete permit and contractor data available. Additionally, number of projects and typical job size may be updated per contractor request.
The time period for the data used for this ranking was the past 365 days, plus an additional 45 days to account for the average timeline of a building permit. If you have any suggestions on the data or see any corrections that you’d like to give feedback on, please fill out this form. For more insights on construction data outside that are not directly related to contractors, there are other resources available as well.
