Maximize your investment. Minimize your risk.

Providing professional property management and real estate investment services.

Property Management

CoSine Real Estate provides comprehensive, professional property management. We understand that maximizing the return on your investment is critical to our success. That's why property owners throughout San Diego depend on CoSine Real Estate to ensure their properties operate smoothly, increase in desirability and enhance in value.


Real Estate Investment

We offer professional, comprehensive real estate investment services in a turn-key manner to maximize your financial return. We provide solid advice, allowing our clients to make sound investment decisions through any market cycle. And by forming small groups of investors, we are able help people achieve investment goals that are otherwise out of their reach.


Residential Real Estate

Whether searching for new investments or looking to sell old ones, CoSine Real Estate offers many benefits to our clients including calculated and thought-out market positioning, incisive negotiation strategies, and a smooth transaction from start to finish. Buying or selling investments can be an enjoyable experience when you can rely on the guidance you’re receiving.

What People Think of CoSine Real Estate:

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I have had a great experience working with Jeremy Sine and find the he is resourceful and informatiove with Property management and Section 8 procedures. It makes what seems complex more simplified. This is much appreciated and saves time. Fees are also not too high. Recommended! Happy customer.

Jessica W
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I hired Jeremy to fix up my rental house and to rent it. He did a great job fixing it up for a pretty low cost. He was very responsive and trustworthy. He would not even take any payment until the house was fixed. He had it rented to good tenants very quickly. I would use him for any rental house I owned and to sell any house I owned.

Arlene S
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I had a new 4-plex being built in Point Loma while I was living in Cabo San Lucas. CoSine Real Estate not only went the extra mile to coordinate with the contractor to handle the final construction issues for me, but quickly filled the building with great tenants.

Aaron W., Point Loma
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