Additions and remodeling in Altadena, Los Angeles County
ADUs and room additions in Altadena
Altadena backyard ADUs for a parent or grown child, reviewed by Los Angeles County and built with ember-resistant walls, vents, glazing and roofing.
ADU construction moves to the top of the list on an Altadena lot when a grown child or an aging parent needs a home close by and the main house has no bedroom to spare. A separate unit out back gives each family its own door, kitchen and quiet. Before any design, we confirm the lot can take the footprint, that water, sewer and power can reach it, and which fire rules apply to the parcel.
County plan check
Altadena has no city government of its own, so Los Angeles County handles plan review and inspections for a backyard unit there. The county reviewer reads the site plan for setbacks and the space left between the unit and the main house, checks how fire crews would reach the back of the lot, and looks over the structural and energy design. When a parcel lands inside a mapped fire hazard zone, and some Altadena parcels do, the unit is also checked against ember-resistance requirements. We answer each comment the county sends until the permit is issued.
A unit that keeps sparks out
In mountain country, a backyard unit is planned around hard sun, dry wind and the chance of blowing embers. Walls clad in fiber cement or stucco, a Class A roof and eaves closed with solid soffits give sparks few places to settle. Vents get fine metal mesh, windows get tempered glass, and gutters take covers that keep dry leaves out. Inside, the unit has its own subpanel, and the smoke alarms are wired together so a warning in the kitchen also sounds in the bedroom. The main house stays lived in while all of this goes up behind it.
What we build in Altadena
Additions and second stories lead the list. Every other service is available here too, alone or as part of a bigger project.
Nearby cities we also serve
Need more room in Altadena?
Send the address and tell us who the space is for. We will check the local rules and set up a visit.