“Sean was always professional, positive, and super knowledgeable in the real estate market.

He took the time out to meet us at open houses on weekends, new houses on the market after work hours, respond to text messages and emails within minutes, and answer all of our “first time buying a house” questions.

He made us feel comfortable and confident in the home buying process, and I would recommend him to anyone looking to buy.

We cannot thank Sean enough for helping us purchase our first home to start raising our little family.”

Brandon and Erin K.  


“My husband and I had a great experience working with Sean on the purchase of our first home in Hermosa Beach!

He treated our purchase like it was his own and had excellent attention to detail while keeping us informed throughout the process.

Sean made what could have been an incredibly stressful experience an easy and efficient one and we would recommend him to anyone looking to buy or sell their property.”

Jim and Lauren S.


“Sean was a consummate professional throughout all aspects of our home purchase transaction. I think his background in commercial real estate truly sets him apart from his peers.

His methodical and analytical approach to valuation, negotiation, diligence and deal execution set us up for success in a very competitive marketplace.

Sean also helped us lease our Manhattan Beach condo within a week of listing it. That allowed for a seamless transition from when we moved out with no vacancy.

Working with Sean was a true partnership.”

-T.J. F.

“Sean is an excellent broker who can wear various hats throughout the home buying process and tailor his services to your personality and desired needs.

What I liked about working with Sean was that he was able to understand my vision of the home I wanted as well as my husbands must haves and the financial aspects of a home purchase.

Sean was accessible and quickly accommodated all requests to see properties. He showed us various pocket listings as well as properties days before they hit the market.

Sean has your interests in mind throughout the process and ensures that you end up with a home that you love.”

– Libby F.


“In this world where big commercial Real Estate companies and their agents compete to sell or lease your next property, property owners must rely on the little extras that make a difference: expertise in transactions/negotiations, deep knowledge of the market and the neighborhoods, authentic Personality and utmost Integrity. 

I have worked with Sean’s Father, and upon his retirement, with Sean over the past 22 years combined as a very happy client; need I say more??”

-Pierre K.


“When it came time to sell one of our multi-unit, real estate holdings that we had owned for over 40 years, we gave Sean the first shot. 

One of our properties had some issues that we no longer wanted to deal with. It was older, and while clean and maintained, it was not up to par for the expensive neighborhoods of Manhattan Beach. 

We also had inherited four absentee partners through a partner-friend’s inheritance, and three were married, essentially bringing us seven partners. We didn’t want to go through the hassle of upgrading the property ourselves, and we wanted to simplify, so we went to Sean. 

In a neighborhood that had no recent comps, he helped us reach a market value, and advised our maintenance manager what needed to be done to cosmetically make it attractive to show. He listed it as is, so we didn’t have to meet termite people or the myriad of inspectors we expected to be demanded by a buyer. 

He worked with us and our partners through emails and Docusign (an email signature program), and he led us us through several offers with minimal effort of our own. 

We ended up with the best price we ever thought we could get. Sean met every prospective buyer and vendor in person, took on every complication, worked with our maintenance manager, our personal assistant and dealt with the tenants and our partners. 

We could not have chosen a more professional realtor to handle the sale. We are more than pleased to give him our unconditional endorsement.”

-Terry and JoAnn T.


“I had been attempting to buy my first home in an extremely competitive South Bay market for over a year — using a different realtor I had bid and lost repeatedly! Within one month of finding Sean my offer was accepted on a beautiful ocean view home. 

He’s extremely responsive on email and text, which I really appreciated because of my hectic work and travel schedule. It was a breath of fresh air to work with a realtor who is concise, organized, and a great advocate. 

What’s most amazing is that Sean and I really only needed to work together for about 2 months from start to finish, but we still speak regularly a year later. 

He is a fantastic negotiator, resource, and communicator. Sean is not only a wonderful realtor, but a wonderful human.” 

-Sara B.


“As a first time home buyer in an extremely competitive marketplace, Sean was a dream in finding me the right home to fit my needs. 

During the search for my home, I could not have asked for a more patient and understanding guide. He made the process so easy especially during my complex financing situation and going above and beyond to ensure I was well informed and my best interests were at heart. 

I could not have asked for a better experience and would recommend his services to anyone in the future!” 

-Kristin M.


“Sean has helped us buy two homes. Both were unique situations with multiple moving parts which could have easily caused us to lose out. Sean’s exceptional attention to detail, persistence, responsiveness and vast network meant both our first and second home purchases were as happy and stress-free as home buying could possibly be!

His thoroughness and professionalism ferried us through our first home purchase’s tense negotiations and inspection process. With our second home, our offer was accepted with the contingency we get our current home in escrow within 10 days. No easy feat. Sean did it in 48 hours significantly over asking price with multiple backup offers and all of them waiving inspection contingencies. He’s basically our home buying and selling hero!”

-Lauren and Chris T.


“I have used Sean Dinneen several times over the years. First time was back when he only specialized in commercial and industrial property to list my ~41,000 square foot building for lease. 

In a down market Sean was able to find a Tenet and negotiated a 5 year lease. Towards the end of the lease I used Sean to sell the building and identify a replacement property out of state. We ended up negotiating a 1031 exchange purchase agreement. 

I won’t hesitate to use his services in the future!”

-Craig C.


“Sean is one of the most knowledgeable, responsive and capable brokers in the market. 

My family has worked with many brokers in the South Bay over the past few decades, and Sean conducted every meeting and correspondence with sincere professionalism. 

He is genuine and direct and goes out of his way to go above and beyond that results in both happy buyers and happy sellers.”

-Jackie L.


“Buying a house with Sean was a wonderful experience. His strong understanding of the marketplace and solid connections with other local realtors led me to finding a home I loved at the right price. 

As a first time home buyer there were many things I didn’t know, but Sean was extremely helpful throughout the entire process making me really comfortable with the whole process.”

– Tim F.


“We had an amazing experience purchasing our home with Sean. He was there to guide us through the entire process and helped with any questions and/or concerns we had. 

Best of all, with his help we where able to close extremely quickly and move into our new home without a hitch. With Sean facilitating all the necessary steps and transitions, our experience was exceptional. THANK YOU, Sean!”

-Oscar and Becky


“Through his large network and intimate knowledge of the real estate market in the South Bay, Sean was able to find an off-market, 8 unit apartment complex to purchase. 

He was very professional throughout the entire transaction, constantly communicating and was able to provide every vendor I needed to help remodel the property. 

I have already recommended him to friends looking to purchase apartment buildings and homes in the South Bay.”

-Tim S.


“Sean proved himself to be loyal, dedicated,and devoted to helping us find the right house. Great guy. He was also very helpful in dealing with contractors, decorators and others.

I highly recommend or anyone moving to Manhattan Beach.”

– Barry and Claudia P.


“Sean guided us through the daunting task of purchasing, not just our very first home, but our first home in the uber-competitive South Bay market. I don’t think we would have made it through the painful process without him. 

His hyper attention to detail saved us from an inexperienced and underhanded selling agent over and over again throughout what was a lengthy negotiation process and an even lengthier appraisal dispute. He did all this right through the busy holiday season and a brand new baby girl.

Our best interests were at the very heart of every aspect of Sean’s guidance. 

Beyond his incomparable grasp of the market, step by step education of the process, intuitive understanding of our specific wishes and absolute timeliness, he safeguarded us from any questionable tactics by the sellers. He even caught the selling agent’s unmentioned removal of financial contingencies during a 3rd contingency extension. Finally, working full time in addition to not living locally in the South Bay, Sean went above and beyond to helping us get set up locally with handymen, landscapers, etc. so our move would be seamless.”

— Lauren and Chris T.