Specializing in commercial construction services. If you’re a commercial developer, owner, or builder in Northern California, 4JCON is the Construction Services innovator you need. Our founder, Jerry Handy, has over 20 years experience with every facet of the construction industry. The result is that 4JCON redefines the status quo for Construction Services with our unprecedented leadership process. While a lot has changed in those 20 years, from technology, governments, economies, and the materials we use, one things remains unchanged – the value of quality, trustworthiness, and standing behind your work. We are proudly old-fashioned. We do what we say we will do, and we have the same standards for our construction managers and hardworking craftsmen.