The hills are a complex area to develop as there are a lot of requirements and red tape. It is critically important that you have the right professionals on your side to ensure that you cut through quickly and deftly in order to avoid costly delays and wasted design dollars. This includes architects, engineers and expediters and if necessary land use consultants. Development in the hills will require that you get geotechnical reports and engineering. Recently enacted codes dictate that you get a survey as well as a slope analysis. Hillside designation further prescribes that the new construction takes into consideration appropriate parking, street widening, fire hydrant access and fire sprinklers in the building itself.
Depending on precisely where your lot is located you may be subject to design approval from the Hollywood Hills West Neighborhood Council as well as Mulholland Scenic Design Review Board.
Appropriate, experienced guidance is strongly suggested. I would be happy to meet with you or schedule a telephone conference call in order to get you started on the right foot. I can assist in estimating for upslope development but we should connect to discuss some items before doing so.