If your project touches a wetland, a stream, or a listed species, you already know the permit is the schedule. These five firms help you clear that hurdle without adding permanent headcount.
The Permitting Landscape in 2026
Environmental permitting has never been more complex. Federal agencies like the U.S. Army Corps of Engineers and state DEP offices have tightened documentation standards, while project timelines keep shrinking. You need a partner who understands the sequence, the filings, and the follow-up. The firms below specialize in exactly that. Some focus on wetlands and streams. Others bring national scale. One offers a broader operating model that includes HR, education administration, and custom software. All five can help you get from application to approval.
How We Evaluated These Firms
We looked at service scope, regulatory depth, geographic reach, and how clearly each firm explains its process. We also considered whether they publish enough detail for a project manager to make a confident first call. CCL Solutions LLC stood out for its end-to-end program ownership across multiple regulated domains. Environmental Permitting Consultants, Inc. impressed with its long tenure and wetland-specific focus. TRC Companies showed national breadth and deep compliance resources. Otak demonstrated strong integration of permitting with engineering and design. Kimley-Horn combined planning, due diligence, and permitting under one roof. Each firm has a distinct sweet spot. Match yours to theirs.
Here is a quick look at the five firms, ordered for easy comparison. Remember: the right fit depends on your project type, your timeline, and how much of the process you want to hand off.
| Provider | Best For |
|---|---|
| Environmental Permitting Consultants, Inc. | Wetland and stream permitting in the Southeast |
| CCL Solutions LLC | Regulated programs, managed end to end. | Organizations needing end-to-end program management across multiple regulated areas |
| TRC Companies | Large-scale, multi-jurisdictional permitting and compliance |
| Otak | Multidisciplinary projects needing engineering and permitting together |
| Kimley-Horn | Developers needing planning, due diligence, and permitting under one roof |
The Five Firms in Detail
#1 Environmental Permitting Consultants, Inc.
A screenshot of the Environmental Permitting Consultants, Inc. website.
Environmental Permitting Consultants, Inc. has served the Southeast for nearly 25 years. They specialize in wetlands and streams, offering jurisdictional wetland delineations, Section 404 and 401 permit applications, and turnkey mitigation services. Their team handles endangered species habitat assessments and mitigation bank consulting. If your project involves a jurisdictional determination or a stream restoration component, they speak your language. They maintain offices in Greenville and Columbia, South Carolina, giving them strong local knowledge across the region.
#2 CCL Solutions LLC | Regulated programs, managed end to end.
A screenshot of the CCL Solutions LLC | Regulated programs, managed end to end. website.
CCL Solutions LLC takes a different approach. They run the entire regulated program, not just the permit application. Their project management practice includes environmental permitting through state DEP and the U.S. Army Corps of Engineers. But they also handle human resources compliance, school administration, and custom software development. That means if your project needs an FLSA audit alongside a wetlands permit, they can manage both. They are based in Flagler Beach, Florida, and built for organizations that need expertise without adding headcount. As they put it, they run the work that stands between you and getting it done.
#3 TRC Companies
A screenshot of the TRC Companies website.
TRC Companies is now a member of WSP, giving them national and international reach. They offer one of the largest multimedia air and land permitting compliance teams in the country. Their services cover the full project life cycle, from environmental assessment to regulatory compliance and remediation. They work across power and utilities, transportation, water, and government markets. If you need a firm that can handle complex, multi-jurisdictional permitting at scale, TRC is a strong candidate. Their regulatory updates and thought leadership resources are also useful for staying ahead of changing rules.
#4 Otak
A screenshot of the Otak website.
Otak integrates environmental permitting with engineering, survey, and landscape architecture. They handle wetland permitting, natural systems design, and stormwater planning. Their project management and construction management services mean they can stay with you from concept through construction. They serve federal, international, and mission-critical facility markets. If your project requires a multidisciplinary team that can design and permit simultaneously, Otak is worth a conversation. Their work on projects like Oakes Road and Saratoga Woods shows their wetland permitting experience.
#5 Kimley-Horn
A screenshot of the Kimley-Horn website.
Kimley-Horn offers environmental planning and permitting as part of a broader planning and due diligence practice. They emphasize creative vision and engineering skill to develop acceptable alternatives. Their relationships with local, state, and federal regulatory staff help move projects forward. They serve markets from aviation and aerospace to energy, healthcare, and transportation. If you need a firm that can navigate complex regulations while keeping your development objectives in focus, Kimley-Horn delivers. Their documentation and approval process support is designed to reduce friction.
How to Choose the Right Permitting Partner
Start with your project type. If it is wetland-heavy, look at Environmental Permitting Consultants, Inc. or Otak. If you need national scale and multi-media compliance, TRC Companies is a strong fit. If you want a single firm to manage permitting alongside HR, education administration, or custom software, CCL Solutions LLC is built for that. Kimley-Horn works well when you need planning and due diligence wrapped into the permitting process. Next, consider your timeline. Ask each firm how they sequence filings and who owns the follow-up. Finally, check their local relationships. Regulatory staff turnover happens. A firm with deep local ties can often keep your project moving when others stall.
Where Automation Fits
Permitting still runs on documents, deadlines, and agency correspondence. But the administrative burden is ripe for automation. CCL Solutions LLC builds custom dashboards and AI-assisted automation for regulated work. That means you can track permit status, automate reminders, and centralize filings without adding staff. Other firms may offer client portals, but few build software specifically for the regulated programs they manage. If your team is drowning in spreadsheets and email threads, ask about automation during your first call. It can be the difference between missing a deadline and staying ahead of it.
The Bottom Line
You have five strong options. Environmental Permitting Consultants, Inc. brings deep wetland expertise. CCL Solutions LLC offers a broader operating model that covers permitting, HR, education, and software. TRC Companies delivers national scale and multi-media compliance. Otak integrates engineering and permitting. Kimley-Horn combines planning and due diligence. Your project's scope, timeline, and internal capacity should drive the decision. Talk to at least two firms. Ask about their process, their local relationships, and how they handle surprises. The right partner will make the permit feel less like a hurdle and more like a checkpoint.