Building a detached ADU in Orangevale, ground up
A detached ADU is a standalone building in your backyard — its own foundation, its own roof, its own walls, fully independent of the main house. Orangevale is a good place for one: big rural-residential lots, mature trees, real room to site a unit. But two local realities shape every job out here — septic systems on the larger parcels and decomposed granite toward the Folsom edge. Here's how we plan a freestanding unit around all of it, from the Sacramento County counter to the SMUD meter.
What detached actually means here
Detached is the cleanest version of an ADU and the most expensive one to frame. The unit is a complete, freestanding building. Its own foundation, poured separate from the house. Its own walls. Its own roof structure carrying its own loads. Nothing about it borrows from the main residence. That independence is the entire point of going detached — and it's also where the cost lands.
Hold it up against the alternatives for a second. An attached ADU bolts onto your existing house and shares a wall, which saves you a foundation edge and a roof tie-in but pins the unit's orientation to wherever the house already faces. A garage conversion reuses a slab and a roof that already exist, the cheapest path of the three, but you live inside the garage's footprint and ceiling height. Detached throws all of that away and starts from bare dirt.














