Liz Lassen & Mark Kosa

Liz Lassen & Mark Kosa

REALTOR® / Buyer's Agent / Sales Agent at Lassen Realty, LLC
MA: 148877
  •   5   (40 reviews)

About Liz Lassen & Mark Kosa

We are REALTORs in Westborough, MA and we help Buyers, Sellers and Investors with their next dream - home, townhouse, condo or investment. Our goal is to be the best real estate agent in Massachusetts you ever worked with. Lassen Realty serves all of MA, including real estate listings or real estate buying in Westborough, MA, Grafton, MA, Hopkinton, MA, Shrewsbury, MA and we even have a South Shore real estate agent in Weymouth, MA. Owner Liz Lassen is Westborough Massachuestts REALTOR, an Attorney Broker and longtime MetroWest resident. Mark Kosa grew up in Newton, MA and is one of the best REALTOR agents in Westborough, Massachusetts, with an electrical background and hundreds of home inspections, giving him unique insights to share. When you work with Mark & Liz at Lassen Realty, you get the opportunity to work directly with trusted professionals having deep experience in home systems, renovations and negotiations. Mark has been involved in various aspects of construction and real estate for over 35 years. Mark is a MA licensed real estate professional, licensed master electrician and a licensed home inspector. He brings all of this background to his work with buyers and home sellers. His client-centered approaches are appreciated by all his customers & has earned him respect from his peers. He always aims to inform and educate his clients, giving them the tools they need to make educated real estate decisions. Liz is a MA licensed attorney and licensed real estate broker. She started Lassen Realty to apply her negotiation, analytical and business skills to solve real problems for real people. Her success is reflected in the many heartfelt comments from real estate clients who have benefited from her tireless work over the years. Whether you are a first time or relocating home buyer, homeowner thinking of selling, or using real estate to build your investment portfolio, we welcome the opportunity to represent you in your sale or purchase. These are big decisions, with many considerations. Whether you are just curious or ready to act, we encourage you to reach out. We want help guide you through the process at your own pace and welcome questions. Key differences between Lassen Realty and other brokerage firms: -Lassen Realty is a small and independent real estate brokerage offering flexible & personalized service. -We bring important real world skills to real estate that you can not find in other firms. -Mark & Liz have years of working together, providing seamless and synergistic teamwork on your behalf. -Each are longtime residents of several different communities and school systems in MetroWest. -Proud REALTOR® members and adhere to the REALTOR® Code of Ethics. In short, everything that we do at Lassen Realty is focused around you, our client, and sharing the benefit of our knowledge, always with the highest integrity.

Liz Lassen & Mark Kosa's reviews

  5  
Liz Lassen & Mark Kosa has 40 reviewsacross 23 different locations, showing 6.
Review Liz Lassen & Mark Kosa
over 1 year ago
Outstanding experience

We've used Mark & Liz a few times now and we recently used them to buy and sell a house at the same time. The whole process with them is super easy and they are on top of everything. They did research prior to us putting an offer in to make sure our offer was in line with the market and competitive enough to make our offer stand out. As far as selling goes, we got a full price offer in the first weekend and even got some extra credits thanks to Liz and her due diligence. Their knowledge, experience and expertise make them great partners for all your real estate needs.

over 1 year ago
Liz and Mark

I would highly recommend Liz and Mark to handle the selling of any property. They went above and beyond everything I had expected in a realtor. Not only was their knowledge of the market and the things I could do to maximize the selling price spot on, but they also understood some limitations I have and worked closely with me to get the necessary work done to put my home on the market and get the best price possible. They are kind, caring, attentive and professional. I rate them a 10 out of 10.

almost 2 years ago
The best agents we’ve worked with!

Liz and Mark were absolutely wonderful to work with! They found us our dream home in a relatively short span of time. In fact the home we bought was one that Liz encouraged us to see! Mark and Liz were extremely professional, and detail oriented, and they managed to gave it a personal touch! We could not have worked with better agents! We will definitely be referring them to friends and family! In fact we’ve already started 😁

almost 2 years ago
Cannot recommend Liz and Mark highly enough

Cannot recommend Liz and Mark highly enough. They did such a fantastic job as selling agents for us. They are tireless, professional, knowledgeable, and responsive. We are lucky to have found them and cannot recommend them highly enough to anyone in central Massachusetts looking to sell their property.

about 2 years ago
Stress Relievers

Liz and Mark were fantastic to work with again. Both are very knowledgeable and on top of every detail making the selling of my house stress free.

over 2 years ago
Challenges to Sweet Success

Opportunity knocked and Liz and Mark stepped forward to represent me on what would be a challenging estate purchase. Liz clearly advised me of probable delays, issues with the closing as well as the “as is” condition of the property. When listing discrepancies came to light post offer acceptance, both Mark and Liz stepped in to address with sellers agent and other parties to favorably resolve. Highly responsive and supportive during an emotional rollercoaster 3 month closing period. Should the future put me back into the real estate market, who else would I call?

Show all 40 reviews

Liz Lassen & Mark Kosa's properties

Liz Lassen & Mark Kosa has sold 3 properties in the last 12 months, showing 3, sorted by most recent activity

SoldApr 15, 2026
$385,000
L/206 Tall Oaks Drive
Weymouth Town MA 02190
2
1
2
Condo
Listing courtesy of Lassen Realty, LLC and Zander Realty Group
SoldNov 6, 2025
$540,000
331 Cooper Rd
Worcester County MA 01534
5
2
3
Single-Family
Listing courtesy of Lassen Realty, LLC and Red Post Realty
SoldJul 22, 2025
$325,000
251/251 Sunderland Road
Worcester MA 01604
2
2
2
Condo
Listing courtesy of Lassen Realty, LLC and KW Pinnacle MetroWest
Show all 3 properties
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