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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Jeremy Sine is extremely competent and I would recommend him without any hesitation to anyone owning real property.

Chris H., Carlsbad
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Jeremy Sine is a consummate professional who takes great pride in his work. It has shown in the care and attention he pays to my buildings. My rents increased by 10% and the building has never looked so good. Thanks for a job well done.

Brent F., Pacific Beach
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