information2thf development group inc. (thf) is a licensed construction company licensed by the state of california’s state contractor’s board (license no 99999999). in 1990 the principals at thf began adding legal and fully permitted second unit dwellings onto single family home’s that were sitting r2 lots throughout the state of california and many other cities across the country. realizing that adding a second unit to a home sitting on a lot zoned r2 was a matter of right the principal’s at thf carved out a niche in the home improvement business market place and presented our services to homeowners who were looking to add a legal second unit to their property for a multitude of reasons such as: to obtain additional monthly income by renting out the second unit, to increase their property’s value because the addition of the second unit is generally valued at 2-3 time the cost to build the second unit, to save money for their retirement, to save money for their children’s education or to house family members.in the year 2002 like many other states across the country, the state of california in enacted assembly bill 1866 this made it legal to add a second unit dwelling to a single family home sitting on a r1 lot as a matter of right. the principals at thf right away went to work offering our services to homeowners on r1 lots who wished to legally add a second unit dwelling to their property. in the beginning the process of obtaining a building permit to legally add a second unit to a single family home sitting on a r1 lot proved to be a very long and complex process because the city of los angeles was only granting permits for second unit dwellings sitting on r1 lots in limited circumstances through what’s called a conditional use permit process which was a direct violation of assembly bill 1866. even with the road blocks the principals at thf were more successful in completing second unit dwellings on r1 lot projects than any other contractor in that era.