Great People Don't Work Alone

Broker | Owner

Cassie fosters long-term relationships with her clients who oftentimes turn out to become great friends. This people-centered approach to business has earned Cassie 5-star reviews across the board and keeps her ranked in the top 3 of Oxford County’s individual performing brokers year after year.

She has handled hundreds of transactions over the past decade and this experience gives her a deep understanding of the vacation home market and what level of service clients in Western Maine truly deserve for an enjoyable transaction.

Cassie was born and raised in Bethel and has a deep love for the area. She grew up skiing the slopes of Sunday River, attended Gould Academy, and returned home from life in Bozeman to raise her family in Bethel.  

She is passionate about giving back to the local community and in addition to designating a portion of every commission to an area non-profit, Cassie volunteers on the board of directors at the Mahoosuc Land Trust. (Read more about giving on the philanthropy page). 

Outside of work, Cassie is probably playing outdoors with her two kids Anna and Ronan, with her husband, Mark, and their dog, Posey.


Amber loves checklists. In fact, she lives for them. Her head doesn’t hit the pillow at night until every box on her day’s list has earned its checkmark. In an industry that’s always changing and deals that are always different, the high level of organization that Amber provides is essential to our sales and office operations.

A lifelong Mainer, Amber found her true love in Bethel in 2010 and has lived here ever since. She can relate to the wonderful attributes the town has to offer. Amber and her husband are here for the long haul; raising their two sons Jensen and Vincent, along with their boxer, Booker, and cat, Missy.

Amber will most likely be the person to greet you at the office, she loves taking care of people and can’t wait to meet you in person. When she’s not at work, Amber is enjoying time with her family.

Vacation Rental Manager | Showing Agent

Mark is happiest when he is working directly with a property owner, rental guest, or an employee. He is so committed to problem solving, improving the current situation, and planning for the future that he often takes notes during or after an important conversation so that he keeps the client’s needs top of mind as the day goes on. 

With a strong background in trip planning and leading, Mark has become the guy in the group that puts everyone else first. Whether he’s leading you from Mexico to Canada along the Pacific Crest Trail or guiding you through the process of owning your first rental house, you can be sure that Mark will be happy only when you are thrilled.

Mark is Cassie’s husband so that tells you that he is a patient and easy-going guy.

Associate Broker

If there is anyone in this world that understands and values the importance of customer service, it is Lindsay Gagnon. Prior to earning her associate broker license, Lindsay worked at the local branch of Northeast Bank in Bethel where she spent 9 years catering to her customers' needs and building her highly professional and friendly reputation which she maintains today in the real estate industry.

Those who know Lindsay on a personal level can attest to the fact that the energetic, bubbly person you see in public is the same one you get at home. This character consistency goes a long way in overcoming tough curveballs during a real estate transaction. When you need an advisor to guide you and a friend to support you, Lindsay is there.

Lindsay’s passions beyond her career include spending time around a campfire with friends, time with family at her camp on Richardson Lake, and downtime at home with her husband, Ryan, and their two handsome boys, Lane and Bryson. Lindsay understands that family is everything and is grateful that hers has been here for generations.


Louise has lived in Bethel for her whole life and sees no reason to leave. Everything about the area; the people, the places, and the scenic landscape, keep her heart full. 

Louise works directly with The Williamsons and provides them with full-time sales and rental support. Her prior work experience at a local attorney’s office makes her an asset to the team. Louise is a wealth of knowledge when it comes to the history of area properties and to the rules and regulations of the industry. 

With three young grandchildren, Louise and her husband, Willie, can usually be found visiting with them or enjoying time together.

Associate Broker | Broker

Julia and Gary Williamson are lifelong residents of the Bethel area and their family has been meeting the needs of real estate clients for generations. The Williamsons are the former owners of Four Seasons Realty in Bethel which was founded by Julia’s grandfather, Gordon Brown, in 1994. 

The Williamsons continue to practice real estate sales with Cassie Mason Real Estate and they independently own and operate Four Seasons Vacation Rentals which serves the greater Sunday River area. 

When they are not in the office, Gary and Julia are likely on the baseball field, at their camp on North Pond, or enjoying dinner (likely venison) with their four sons, one daughter-in-law, and granddaughter, Gracie. Grandparenting has been a life-changing blessing for Gary and Julia since Gracie’s arrival in 2021.

Associate Broker

As a third-generation Lowell in the small town of Bethel, Vicki brings with her an appreciation for customer service. This is an attribute that she has been raised on first-hand her entire life. 


Vicki grew up at her family’s business; always watching her parents and their employees prioritize customers' needs. She has witnessed exactly what it takes to be successful in the business world. 

With a degree in business from St. Joseph's College and real-life experience in the workforce, Vicki is an agent armed with discipline and knowledge. She listens closely to her client's needs and works tirelessly to find them the exact property or solution that is best for them. This dependability makes Vicki an advisor you can trust. 

Vicki spends her personal time riding and caring for her horses. She and her partner, Josh, are currently building a home in Andover.

Our Core Values


We have no hidden agenda and will use our expertise to help you reach the decision or action that is consistent with your personal goals (even if it means terminating your transaction or holding off on a sale).



We will always be here to support you, even after the deal is done. When you need a referral for an electrician or a recommendation for firewood delivery, we’ve got you covered. Our service to you is how we will earn your trust.



We have the opportunity to bring joy and fun into your real estate transaction and we don’t take this lightly. We understand that a little levity goes a long way in this business and we are here to deliver that.


The best way we have found to honor our clients and our community is to not take for granted the successes and opportunities we have had through the real estate industry. A portion of every commission goes straight back to local projects and non-profits.


We pledge to keep our service, marketing, advertising, office environment, and best practices ahead of the local market and on track with national conglomerates. We keep an eye on trends across the country and make sure we bring those back to Maine.


We are excited to get out of bed every morning and tackle new challenges and learn new things. We are committed to learning something new every single day because new knowledge fuels our fire and raises the bar.

We Give Back

We value the importance of a strong community. By giving through channels of volunteerism, monetary donations, and service, we believe that we can contribute to the common good.

Local non-profits that have been recent recipients of our donations include:

  • Christmas For Kids
  • The Bryant Pond 4-H Learning Center
  • Team Hailey Hugs
  • The Mahoosuc Land Trust
  • St. Jude's Children's Hospital
  • Kids In Need
  • Mahoosuc Search & Rescue
  • Bethel Food Pantry
  • Ellis River Riders Inc. (pictured, left)
  • ...and many more!

We give back a percentage of every closing. 

We love what we do.

We live here because we love our small community and the laid-back country vibe. It's easy for each of us to relate to the "pull" that intrigues buyers about Western Maine. From the lakes to the rivers and the mountains to the valleys, it is easy to see that Mother Nature has blessed us with a recreational paradise. Come along and find your base-camp with us. Whether it's a place to crash on the weekends or a home to raise your family, we will work together to find the perfect fit. 

Read Our Reviews

$190 mil.

Closed Inventory

5 min

Speed to Response


Neighborhood Expert


Client Satisfaction

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