Your landlord has broker representation. Shouldn’t you?

TW Commercial represents commercial tenants — not professional landlords. We serve businesses throughout Boulder, Denver, and the Front Range through finding the right space, negotiating the best terms, reducing total occupancy costs, and making the right real estate decisions. Our mission is to protect your interests.

Start Your Property Search

Your landlord has broker representation. Shouldn’t you?

TW Commercial represents commercial tenants — not professional landlords. We serve businesses throughout Boulder, Denver, and the Front Range through finding the right space, negotiating the best terms, reducing total occupancy costs, and making the right real estate decisions. Our mission is to protect your interests.

Start Your Property Search
30+ Years Experience | Tenant / Buyer Agents | 5-Star Google Reviews
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Will Gensburg

Founder & CEO, Nuvania
Boulder, Colorado

A CLIENT STORY

They Didn’t Just Find Me a Property. They Understood What I Was Trying to Build.

They understood me…They protected me…They negotiated for me…They stayed with me.

Home_2 2I contracted with TW Commercial in the summer of 2025 to help me find the right location to launch Nuvania, a group sauna and cold plunge facility in Boulder. Mark and Isaac immediately took the time to know and understand me as an entrepreneur, my budget, my tolerance for risk and what I was ultimately trying to build before they began to present properties to me. They helped me narrow down our search to an ideal property and then negotiated heavily on my behalf, procuring lease terms and concessions to my lease I am confident I would not have gotten on my own. Since signing, they have remained engaged when they haven’t needed to be, helping my nascent business get every chance of success through knowledge and connections they have had through their many years in commercial real estate. If my business succeeds and I expand Nuvania beyond the facility we’re launching in the Fall of 2026, TW Commercial will be my first call.Home_2 3

YOUR COMMERCIAL LEASE IS TOO IMPORTANT TO LEAVE TO CHANCE

A commercial lease can affect a business for years—and the landlord has experienced professionals negotiating to protect their interests.

You shouldn’t have to navigate that process alone.

What’s at stake:

Cost
Rent, escalations, operating expenses, tenant improvements.

Flexibility
Renewal options, expansion, contraction, assignment and exit provisions.

Risk
Personal guarantees, unexpected obligations, unfavorable clauses.

Time
Negotiating a complex transaction takes expertise and enormous amounts of time.

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WHAT DOES GREAT TENANT REPRESENTATION GET YOU?

Better Financial Terms
Reduce occupancy costs and improve the economics of your deal.

Better Lease Terms
Protect your business with stronger provisions and greater flexibility.

Better Negotiation
Level the playing field with experienced representation on your side.

Better Decisions
Know whether renewing, relocating, expanding, or buying makes the most sense.

Peace of Mind
Know that someone experienced is looking out for your interests.

PEOPLE

Home_2 6MARK CASEY

CEO & Managing Broker

With more than 30 years in commercial real estate, Mark has helped hundreds of businesses make smarter leasing, development, and investment decisions. His broad experience spans brokerage, architecture, construction, development, and finance. He brings expertise, integrity, and a genuine commitment to his clients’ success.
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Home_2 7ISAAC GUANAJUATO

Commercial Real Estate Broker | Expert in Property Sales, Leasing & Investment Strategy

With more than 20 years in commercial real estate, Isaac helps clients navigate complex sales, leasing, and investment decisions. Known for his strategic approach, market insight, and strong negotiation skills, he develops tailored solutions that maximize value while building lasting relationships through trusted, responsive service. read more

Clients Who Trust Us

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Google reviews

TenantWisdom LLC place picture
TenantWisdom LLC
5.0
Based on 22 reviews
review us on
Anthony Harrigan profile picture
Anthony Harrigan
2 years ago
As others have mentioned, Mark is a true professional. He and his team have gone above and beyond for us in negotiating our office lease terms and subsequent renewal. There is no way we could have negotiated the same terms and we would have spent precious wasted time trying to do so without him. He is very accessible, responsive and easy to communicate with. We could not be happier with the results and would recommend him highly.
Lyle Haas profile picture
Lyle Haas
3 years ago
Working with Mark has been my please. He is a true professional, a stickler for detail and a planner. He works very well with the other Agents in the area and it's obvious that he's well respected. He made the process of moving our main office to a new location smooth and painless. We look forward to working again with Mark and his new Associate, Isaac Guanajuato.
Tracey Parrish profile picture
Tracey Parrish
4 years ago
Mark was very knowledgeable and worked hard for me on a purchase transaction. He has a wonderfully calm and kind manner and I would work with him again.
Carl Beyer profile picture
Carl Beyer
4 years ago
Mark took on a challenging requirement of our needs and came through spectacularly.
Megan Moriarty profile picture
Megan Moriarty
5 years ago
It was a pleasure to work with Mark! He helped our small non-profit find the perfect new retail space that suits our growing operations. His extensive knowledge of the commercial real estate market in Boulder was invaluable as we looked for new spaces. He is a savvy negotiator and prepared us well for a lease renewal conversation with our previous landlord. It was great to have someone well versed in the details of commercial leases in our corner.
Eric Anderson profile picture
Eric Anderson
5 years ago
Mark Casey did a great job at helping me secure an office space rental in Gunbarrel! I knew nothing about commercial real estate and Mark helped me navigate the complexities of find a right sized space that would help my company grow. If you are looking for a tenet rep, look no further!
Chella Dawn profile picture
Chella Dawn
5 years ago
Mark was great!! I had very specific criteria and he worked hard & found everything we needed.
Seam Maher profile picture
Seam Maher
5 years ago
Mark handled the sublease for half of our office space due to a shift toward remote working and did an amazing job. He was extremely thorough and did all the heavy lifting in terms of getting the deal done. Mark provided great advice and insights every step of the way. I will definitely use him for any future leasing needs.
Lisa Citarella profile picture
Lisa Citarella
6 years ago
Mark Casey of Tenant Wisdom is so knowledgeable and patient. It was my first time leasing a workplace and Mark answered all of my questions and educated me in the process. I appreciate his knowledge, but also his ability to make me feel comfortable to ask even the most basic of questions. When it is your first time leasing, it is nice to work with someone who does not make you feel like an idiot, ha ha.
Charles Partee profile picture
Charles Partee
6 years ago
Over 15 years and several companies, I've sought Mark's counsel, guidance, and assistance for commercial real estate. The options he's researched and shown us in each case always met our requirements so we just had to pick the best of them. He's responsive, engaging, and pleasant to work with. I'll work with Mark again.
Anat Sneh profile picture
Anat Sneh
11 years ago
I highly recommend mark for commercial real estate transactions. His professionalism and extensive experience were an asset to our company. We were looking for a space with a unique set of needs and Mark was able to narrow for us quickly what can actually work, spending hours on the phone to make sure these spaces can work. He then helped us through a fairly long negotiation process at every step of the way, from negotiating better terms than we would have thought we could get, to helping us find contractors that can do the work we needed. At all times he was diligent, proactive, and pleasant to work with. We will contact Mark for any future commercial space need and we recommend him enthusiastically to others.
Beth Marvel profile picture
Beth Marvel
12 years ago
I high recommend Mark and Tenant Wisdom for finding a commercial spaces uniquely suited to your unconventional needs. I was working with Dharma Ocean Foundation when we chartered Mark with a very uniquely challenging commercial rental project. "Find us a space where we can host meditation practice, that also accommodates the office staff who support the organization." Mark was very creative and patient in finding us a space. He was very professional yet personal, offering a large body of knowledge and depth of experience. He was also very frank as the situation demanded. When it comes to commercial real estate, I would work with Mark again in a heart-beat.
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Testimonials

Mitchell Wiens

"We first met Mark through an interest in one of his Boulder property listings. Mark is very knowledgeable of the local market and effective at navigating the search process. He really listened to our specific facility needs to match us with the right potential properties on the market. We were able to focus on a select few properties that best met our needs and work closely with Mark to close on our new space in time to support our transition. We really appreciated Mark’s insight and ability to manage the entire process for us.” - President and COO, MMA Design LLC
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:45:56+00:00
"We first met Mark through an interest in one of his Boulder property listings. Mark is very knowledgeable of the local market and effective at navigating the search process. He really listened to our specific facility needs to match us with the right potential properties on the market. We were able to focus on a select few properties that best met our needs and work closely with Mark to close on our new space in time to support our transition. We really appreciated Mark’s insight and ability to manage the entire process for us.” - President and COO, MMA Design LLC

Sylvia Bernstein

"Mark Casey was the ideal broker for our facility search for so many reasons. He was responsive and easy to get in touch with, always patient with our questions and concerns, and extremely knowledgeable about the local market. We definitely plan to engage him again for our next search!" - President, The Aquaponic Source
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:44:47+00:00
"Mark Casey was the ideal broker for our facility search for so many reasons. He was responsive and easy to get in touch with, always patient with our questions and concerns, and extremely knowledgeable about the local market. We definitely plan to engage him again for our next search!" - President, The Aquaponic Source

Bob Baile

"We are in the beer business not the commercial real estate business. Mark Casey helped us to understand the market and to make an educated decision in leasing our new facility. We are very happy we used TW Commercial℠ as our tenant agent." - President of Twisted Pine Brewing Company
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:43:47+00:00
"We are in the beer business not the commercial real estate business. Mark Casey helped us to understand the market and to make an educated decision in leasing our new facility. We are very happy we used TW Commercial℠ as our tenant agent." - President of Twisted Pine Brewing Company

Dominique Gettliffe

"We had already been looking for a few years when we started working with Mark, and nearly gave up on finding the right place to buy for my architecture office. It took us awhile to clarify exactly what we were looking for. Mark was very patient with us, and once we got on the right track with knowing what we wanted, within a week had found us a place that was better than anything we could ever have imagined. Mark was wonderful to work with: knowledgeable, responsive and clear. He kept us well-informed and made the process easy and enjoyable." - Gettliffe Achitecture, Boulder, CO
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:42:23+00:00
"We had already been looking for a few years when we started working with Mark, and nearly gave up on finding the right place to buy for my architecture office. It took us awhile to clarify exactly what we were looking for. Mark was very patient with us, and once we got on the right track with knowing what we wanted, within a week had found us a place that was better than anything we could ever have imagined. Mark was wonderful to work with: knowledgeable, responsive and clear. He kept us well-informed and made the process easy and enjoyable." - Gettliffe Achitecture, Boulder, CO

Steve McIntosh

"Mark Casey has been Now & Zen's real estate agent since 1998 and has served our company well. His understanding of the market, together with his entrepreneurial nose for opportunity, make him a consummate real estate professional. I highly recommend Mark to anyone interested in commercial real estate." Founder and President, Now & Zen, Inc.
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:40:26+00:00
"Mark Casey has been Now & Zen's real estate agent since 1998 and has served our company well. His understanding of the market, together with his entrepreneurial nose for opportunity, make him a consummate real estate professional. I highly recommend Mark to anyone interested in commercial real estate." Founder and President, Now & Zen, Inc.

Scott Hendrickson, PhD

"Thanks so much for sharing your expertise and for your hard work on our move to new office space. We appreciate the way you helped us distill what we needed and wanted to a clear set of requirements and then provided us with many great choices of office space fitting our needs. Your experience making offers and counter-offers, and guidance in walking us through a somewhat complicated sublease process is much appreciated. We also appreciate the way you kept the project on track when we got busy, overwhelmed by the options, and the negotiations got bogged down. Thanks again, and best wises in all that you do." Director Business Development, Tech-X Corporation
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:39:18+00:00
"Thanks so much for sharing your expertise and for your hard work on our move to new office space. We appreciate the way you helped us distill what we needed and wanted to a clear set of requirements and then provided us with many great choices of office space fitting our needs. Your experience making offers and counter-offers, and guidance in walking us through a somewhat complicated sublease process is much appreciated. We also appreciate the way you kept the project on track when we got busy, overwhelmed by the options, and the negotiations got bogged down. Thanks again, and best wises in all that you do." Director Business Development, Tech-X Corporation

Maury Dobbie

"Mark, I want to thank you for assisting us in obtaining office space for my two companies. Thank you for being part of the Fort Collins incubator program and assisting companies like ourselves with their real estate needs." - Executive Director, Colorado Energy Research Collaboratory
TW Commercial - Representing Businesses Leasing Space
2020-01-09T21:38:10+00:00
"Mark, I want to thank you for assisting us in obtaining office space for my two companies. Thank you for being part of the Fort Collins incubator program and assisting companies like ourselves with their real estate needs." - Executive Director, Colorado Energy Research Collaboratory
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TW Commercial - Representing Businesses Leasing Space

From our headquarters in Boulder, Colorado

From our headquarters in Boulder, Colorado, TW Commercial℠ provides Tenant Representation and Buyer Agency expertise to along the Front Range of Colorado. And through our global network, we can connect you with the top exclusively Tenant Rep Advisors throughout North America and beyond. 

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