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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We have been using CoSine Real Estate to manage our rentals for almost 8 years now. They have done a great job taking care of our 5 places. If something needs attention, they have been on top of it without delay. We especially like the online line reporting they provide, since we are out of country most of the time. We can recommend him without hesitation.

Timothy B., Australia

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

We have entrusted Jeremy with managing our San Diego property which is very dear to us. We chose Jeremy for many reasons, however, none of which were more important than the personal recommendation of a neighborhood friend who had been using Jeremy to manage his property. Jeremy has lived up to all of our lofty expectations and I have peace-of-mind knowing that our home is in great hands - which is truly priceless.

Tristan A
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