The Eaton Fire damaged and destroyed homes across Altadena. If yours was among them, your first instinct is the right one: file the insurance claim and plan the rebuild. Insurance arrives. Your adjuster provides a scope of work. You review it and think this seems complete.
It is not.
Most fire insurance scopes miss 15–40% of what actually needs to be rebuilt.
The gaps are not usually intentional. Insurance adjusters work quickly. They estimate based on formulas, not a site-specific assessment of your lot. They miss Altadena-specific challenges: hillside drainage, grading damage, foundation repairs, and water-intrusion prevention.
If you do not identify these gaps before construction, you will pay for them yourself. This guide walks through the most common insurance gaps in Altadena fire rebuilds and how to budget for them. For a full cost picture, see our breakdown of the cost to rebuild a home in Altadena after the Eaton Fire. If the payout is already short of the rebuild, read what to do when you are underinsured after a fire.
How your policy pays—actual cash value versus replacement cost—affects how much of a shortfall you can recover. The construction gaps below sit on top of that coverage-type question. They are the line items that never made it into the scope in the first place.
UBIC is a licensed California contractor (CA #1111731) specializing in custom homes and fire rebuilds in Los Angeles, with a focus on Altadena Eaton Fire recovery and Pacific Palisades Palisades Fire recovery. The ranges in this article are typical of Altadena hillside rebuilds, not a bid for any one lot.
The Most Common Insurance Gaps in Fire Rebuilds
Fire insurance coverage is written around the dwelling. An Altadena rebuild is a hillside project: soil, slope, water, code, and systems that a square-footage formula does not see. These six gaps are the ones Eaton Fire homeowners encounter most often when the insurance scope is compared with what the lot actually requires.
Gap #1: Grading & Drainage ($30K–$80K)
What insurance covers is a simple sentence: rebuild the home to pre-fire condition. What that sentence misses is the ground under the home. Fire destabilizes hillside grading. Water runoff changes. Proper drainage is what prevents later water intrusion and foundation damage.
Most Altadena homes sit on hillsides. Fire burns vegetation, destabilizes soil, and changes slope drainage patterns. Without proper grading and drainage, a newly rebuilt home sits on an unstable slope that is vulnerable to water damage.
The cost to fix this after the rebuild is $30K–$80K. It is expensive because it is corrective, not preventive. You are cutting into finished work instead of building the drainage in with the foundation.
The solution is to get a geotechnical engineer to assess hillside grading before reconstruction, then include proper drainage, retaining walls, and slope stabilization in the rebuild scope up front. Insurance usually does not cover this work because it is treated as site work, not structure.
Gap #2: Foundation & Structural Repairs ($25K–$100K)
What insurance covers: rebuild the foundation to code. What they miss: fire can damage concrete slabs, footings, and structural connections. Most adjusters estimate foundation costs based on square footage, not site-specific soil and foundation conditions.
Altadena sits on expansive soil—clay that shifts with moisture. Fire dries that soil. Then heavy rains cause swelling. If your foundation was not reinforced before the fire, the damage exposes weaknesses that now need correction, not a like-for-like pour.
The cost to fix this after the rebuild is $25K–$100K, covering structural engineers, foundation repairs, and reinforcement. Have a structural engineer assess the foundation before anyone bids the rebuild. Foundation damage often requires more reinforcement than the pre-fire condition.
Gap #3: Exterior Envelope & Waterproofing ($15K–$50K)
What insurance covers: replace walls, roof, windows, and doors. What they miss is the moisture system that holds those parts together. Fire damage affects roof underlayment and flashing that are not always visible on the initial estimate; window-frame seals and how they integrate with the wall; exterior caulking and sealants; and interior vapor barriers and moisture control.
Adjusters estimate based on surface damage. They miss the integrated moisture-management systems that prevent water intrusion. Altadena’s wet winters mean hillside homes develop water-intrusion problems easily. Proper waterproofing is critical on these lots, and insurance often underestimates this work.
The cost to fix it after you have moved in—once water starts appearing in the walls—is $15K–$50K. Include comprehensive waterproofing in the rebuild scope: modern roof underlayment, flashing, caulk, vapor barriers, and drainage planes. This costs more up front but prevents expensive water damage later.
Gap #4: Mechanical Systems Reconstruction ($20K–$60K)
What insurance covers: replace HVAC, plumbing, and electrical. What they miss is that fire damages systems inside walls, under floors, and in crawl spaces. The written scope does not always include the hidden work:
- Complete ductwork replacement (often only “visible” ducts)
- Plumbing-line replacement, especially underground and in-slab lines
- Electrical conduit and rewiring
- Ventilation and humidity-control systems
- Gas-line replacement and safety certification
If those systems are discovered after the rebuild, the cost to fix them is $20K–$60K. Work with mechanical engineers during the scope review. Validate that all systems—visible and hidden—are included. Underground plumbing and electrical should be replaced entirely, not just “where visible.”
Gap #5: Site Restoration ($10K–$40K)
What insurance covers: the structure, and maybe some hardscape. What they miss adds up quickly:
- Retaining walls
- Fencing
- Landscape restoration
- Driveway and parking-area restoration
- Exterior lighting
- Grading for proper water drainage away from the home
These costs add up fast but are often treated as “not necessary for habitation” by insurance. Include site restoration in the rebuild scope. It is part of making the home livable and preventing future damage. On a hillside lot, leftover grade and missing retaining walls are how water finds the foundation.
Gap #6: Code Upgrades ($15K–$50K)
What insurance covers: rebuild to current code. What they miss is that fire-code updates for fire-damaged properties often require more than a generic “to code” line:
- Fire-resistant roofing materials (Class A only)
- Metal gutters, not vinyl, which melts in a future fire
- Tempered windows in specific locations
- Fire-resistant siding in some Altadena zones
- Updated HVAC efficiency standards
- Electrical-system upgrades if the pre-fire system was outdated
Insurance estimates do not always include these upgrades. You will discover them during permitting. The cost is $15K–$50K, and it is non-negotiable with the city. Review Altadena Building & Safety code requirements for fire-damaged properties before you finalize the rebuild scope, and build these upgrades into the budget from the start.
