Why there is no single answer
Los Angeles County's own rebuild guidance declines to give a one size fits all estimate for when residents can be back in their homes, and it names weather and the availability of design consultants, materials, and contractors as factors that can extend the process. A like for like replacement on a flat lot with a reusable sewer connection and a decided owner is a very different schedule from a redesigned home on a hillside parcel with a septic question and an open insurance claim. The stages below apply to both; their length is what changes.
Stage one: a cleared and buildable lot
Nothing can be built until debris removal is finished. The EPA completed its first phase, household hazardous material removal, in February 2025, and structural debris then came off either through the government program run by the Army Corps of Engineers or through a private contractor working under a County Public Works permit. County guidance states that a building permit cannot be issued until debris removal is complete, although plans can be submitted before that point.
A cleared lot still has questions to answer. If you want to reuse the existing foundation, a licensed engineer has to evaluate it using the County's foundation reuse form, and if the slab is removed and soil is disturbed more than 12 inches deep, a compaction report is needed. County Public Health soil sampling in 2025 found lead above screening levels on some Eaton fire area parcels, so some owners hire an environmental professional to test before building. Most rebuilds also need a corner record survey to mark property lines before construction starts.
Stage two: design and engineering
Design time depends mostly on how far you depart from the original house. A like for like replacement can draw on the old footprint and permit records, while a redesign means new architecture, structural engineering, energy calculations, and possibly a soils report if the foundation uses caissons or piles or the site has a geologic hazard. Fire sprinkler plans and, on lots in a Fire Hazard Severity Zone, a fuel modification plan are prepared during this stage as well.
Owner decisions are a large part of the clock here. Floor plan changes, window selections, and roof material choices made late can send drawings back for revision, so we try to settle the items that affect structure and code compliance first and leave finish selections for later.
Stage three: County review and clearances
Plan review for an Altadena rebuild involves Regional Planning, Public Works Building and Safety, the County Fire Department, and Public Health when the property is on a septic system. A water agency will-serve letter is also part of the package. The County has published review targets for fire rebuilds measured in business days, but each round of corrections adds time, and the number of correction rounds depends heavily on how complete the first submittal is. The details of the permit path are covered on our Altadena permits page.
Stage four: utilities
Power, gas, water, and sewer each have their own provider and their own schedule. County guidance notes that homeowners pay for lateral connections to utilities in the public right of way, and that utilities are prioritizing undergrounding in high fire risk areas, which in some cases requires an easement on private property. Southern California Edison planners have been available at the County's rebuild permit centers by appointment. We start utility applications as soon as the design allows, because waiting until framing is complete can leave a finished house without permanent power.
Stage five: construction and inspections
Once the permit is issued, construction follows a familiar sequence: layout and foundation, framing, roofing and exterior hardening, rough plumbing, electrical, mechanical, and sprinkler work, insulation, drywall, then cabinets, finishes, and exterior work. County inspectors sign off at each stage, and the Fire Department inspects the sprinkler system separately. The project ends with final inspection and the County's certificate of occupancy.
County guidance also notes that a building permit expires 12 months after issuance if construction has not begun, so it helps to line up financing, insurance funds, and a contractor before the permit is pulled. During construction, the pace depends on material lead times, inspection availability, weather, and how quickly change decisions are made.
Dates worth tracking
A few County deadlines bear on timing. County guidance says applications for like for like rebuilds and temporary housing are generally due within two years of the emergency declaration, with extensions possible, and a new standalone ADU may be occupied while the main house is rebuilt until January 7, 2030. Your insurance policy may also carry time limits for collecting replacement cost or living expenses; confirm those directly with your insurer, and confirm County deadlines with the County, since both have changed since 2025.