Seth Grosser

Your Local

Real Estate Expert

Realtor® | DRE#02420032

A little bit about me...

With over 20 years of experience in technology, sales, and public service, Seth brings strategic insight, precision, and a results driven mindset to real estate. His professional background centers on problem solving, process improvement, and delivering client focused solutions; skills that translate seamlessly into navigating today’s competitive Bay Area market.

Married for over 10 years and a proud father of two, Seth understands that a home is more than a transaction — it’s a foundation for stability, growth, and long-term wealth building. He takes time to listen carefully, communicate clearly, and guide clients with integrity and transparency.

Whether you’re purchasing your first home, selling, or making a strategic investment, Seth provides steady guidance and a streamlined experience from start to finish.

"This review is long overdue as I dealt with Jon and Leslie Foster when I was looking for a place to rent. They were property managers for a home which my family of 5 planned to rent during the pandemic. The move in process was smooth as I provided all the nec… Read MoreRead Less

"Major thanks to our realtor Jon Foster at J&L Real Estate Group in Castro Valley, and Jon and Leslie's entire team. HIGHLY, HIGHLY recommend this wonderful group with their incredible knowledge of the real estate market and the heartfelt touch they put into ev… Read MoreRead Less

"Leslie is the best! Not only was she extremely knowledgeable about the industry & area, but she was also thorough, professional & great to work with. It helps that her team is armed with insightful data analysis and research – every step that was taken was dri… Read MoreRead Less

"I knew from the first conversation that I had with Leslie that I was in good hands due to her clear and concise way of telling me how I could navigate the sale of a loved ones home from across the country. She has an extensive network in the community and was … Read MoreRead Less

"A wonderful and professional experience working with Jon & Leslie (including their team) Very responsive and open/direct with their communication (no matter the time of day). The entire process was seamless from beginning to end. What really set them apart wa… Read MoreRead Less

"We reached out to Leslie in January 2022 and was able to schedule an initial appointment the very same day. Right from the beginning we felt that she had the local knowledge and resources to get us maximum value for our house we wanted to sell. Leslie and her … Read MoreRead Less

"New the market and peoples buying habits. Listens to his clients and accepts ideas from them. Has an extremely nice staff to include contractors that he may have to use."

"Jon and Leslie Foster of J and L Real Estate Group recently sold a condominium for us. They have assisted our daughter with buying two homes and selling one of them. All transactions where completed on time and without surprises along the way. You simply wo… Read MoreRead Less

"We chose Jon and Leslie as our realtors from among dozens of local agents in our town because of their polished marketing presence. They did not disappoint. We had high expectations, and they exceeded them all. With J&L, you not only get two expert realtors w… Read MoreRead Less

"Jon and Leslie were an absolute pleasure to work with. Their expertise and experience in the East Bay is truly unmatched. We truly appreciated their level of detail every step of the way. They have a wonderful team that are there with you whenever you need. W… Read MoreRead Less