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Andersen Group Realty - Keller Williams Realty Boston Northwest

17 Waterfield Road
Winchester, MA 01890

(781) 729-2329 https://www.andersengrouprealty.com/

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About Company:

Founded in 20031-10 Employees

Andersen Group Realty is a Keller Williams Realty Boston Northwest team based at 17 Waterfield Rd, Winchester, MA 01890, led by President and CEO Sven Andersen. In more than 20 years in real estate, Sven has closed more than 1,300 transactions, including more than 600 in Winchester, and 52 in the past 12 months (as of October 2026).

We represent first-time buyers, condo buyers, move-up and luxury buyers, and sellers from $325K to $3.5M across Winchester, Lexington, Belmont, Arlington, Woburn, Medford, Melrose, Reading, Stoneham, Somerville and the surrounding Greater Boston communities, with particular strength in luxury and new-construction homes.

Andersen Group Realty has 535 five-star Google reviews and 142 five-star Zillow reviews. Clients most often praise our guidance through the home buying process, our negotiation skills, our support for first-time home buyers, and our staging and open house marketing. We were named the #1 Keller Williams team in Massachusetts in 2022 and 2023, and Sven ranks in the top 20% at Keller Williams Realty Boston Northwest over the past twelve months (as of September 2026).

Contact Sven Andersen: 781-739-2258 (cell) | [email protected]
Office: 781-729-2329
Website: https://www.andersengrouprealty.com
Blog: https://www.andersengrouprealty.com/blog/
Google reviews: https://maps.google.com/?cid=7646813564937400685

Languages:

English

Sven Andersen

Winchester, MA

(144)

50 REVIEWS

(5.0/5)

Zuser20171020053358566

February 16, 2026

Zillow
VERIFIED

We cant say enough great things about working with Sam Hull! From day one, he made my wife, young son and I, feel supported and understood. Buying my first home it was very overwhelming, but he made the experience exciting and manageable. He was incredibly responsive, proactive, and always had our best interests at heart. It truly felt like we had someone in our corner throughout the entire process. Were so grateful for his dedication and would recommend him to anyone looking for a trustworthy and hardworking realtor!

Jennypivor

March 19, 2024

Zillow
VERIFIED

Sam and Sven made everything go smoothly and were incredibly supportive. Sven is a super negotiator and they got me the condo I wanted as well as hooking me up with a broker to sell my condo first.

Zuser20170321181715573

April 5, 2024

Zillow
VERIFIED

Had an excellent experience working with the team. They made the process easy and quickly found me a great new home! As a first time buyer, I came into the process with no knowledge on how the process worked. But felt taken care of and was walked through every step of the process.

IshaniPatel0

May 31, 2024

Zillow
VERIFIED

We're forever grateful to Jessica Braer for helping us achieve our dream of becoming first-time homeowners and we cannot speak highly enough of her exceptional service. As first-time homebuyers, the process seemed daunting at first, but Jessica made everything so much easier with her unwavering support and dedication. From the start, we connected with Jessica effortlessly and felt an immediate sense of comfort and trust. She took the time to explain every step of the process, answered all of our questions, and reassured us whenever we had doubts. Jessica went above and beyond to ensure that we were comfortable and informed throughout the entire home-buying journey. Her expertise and attention to detail were evident in every interaction. She was always available, incredibly responsive, and proactive in addressing our needs. Jessica treated us like family with kindness, care, and professionalism, making this significant milestone feel truly special. Thank you, Jessica and Andersen Group, for your outstanding service and dedication. If you're looking for a real estate agent who genuinely cares, is super easy to work with, and will go the extra mile for you, look no further than Jessica Braer. She is truly exceptional.

Michael D.

January 11, 2024

Zillow
VERIFIED

Sven and his team were great. They were very patient with us as we went through a year-long search. Sven told us what we needed to hear and steered us - he helped us make a smart, not emotional, decision. And then guided us on what we needed to do in selling our house quickly and way over asking. His negotiating skills are unmatched. His team was a pleasure to work with. Highly recommended.

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