The first number most Altadena homeowners see after the Eaton Fire is the one from their insurance company. The number that actually determines what you can build is different, and it's worth understanding how it comes together before you start designing plans.
For a flat-lot custom home rebuild in Altadena, $1.25 million–$1.75 million is a preliminary planning range, not a quote or guaranteed price. The final figure depends on the home’s size, site and foundation conditions, design, finishes, code and utility work, and the difference between the carrier’s scope and the actual rebuild scope.
In this blog, we cover preliminary Altadena rebuild cost ranges, what our own completed rebuilds have run, why two homes the same size are priced differently, and how the insurance settlement gap forms.
Early cost and timeline ranges are preliminary planning tools, not quotes or guaranteed schedules. Design and engineering, permitting, and construction are separate phases with different requirements and dependencies.
Insurance coverage and settlement amounts must be confirmed with the insurer and appropriate advisers. Permit approval and fee-waiver eligibility are determined by the relevant authorities. Moūnte Studio does not promise coverage, approval, fee waivers, or a move-in date.
For a flat-lot custom home rebuild in Altadena, $1.25 million–$1.75 million is a preliminary planning range, not a quote or guaranteed price.
Moūnte Studio designs and builds throughout Altadena, Pasadena, South Pasadena, San Marino, and La Cañada Flintridge, and we have multiple Altadena rebuilds in construction right now. The numbers below come from our own project cost database, benchmarked against those projects, not from national averages.
Also, the ranges cover design-build coordination, construction labor, materials, and project management. Architectural design, engineering, permit and utility fees, solar, pools, and landscape are priced separately or carried as allowances.
The $1.1 million–$1.4 million benchmark discussed here relates to active projects. It should be treated as a preliminary comparison, not a completed final cost or a quote for another property.
Project benchmarks and early planning allowances serve different purposes. Actual costs depend on the approved scope, site conditions, selections, exclusions, allowances, and contract terms.
The $1.25 million to $1.75 million is a preliminary planning range. It runs higher at the top because most homeowners add footprint or upgrade selections somewhere between the first conversation and the final set of drawings.
The $1.25 million to $1.75 million range assumes a flat lot and a home roughly in the 1,900 to 2,200 square foot range at our Signature level of finish, which is where most rebuilds end up.
Larger footprints, hillside lots, and Estate-level finishes move above it. The per-square-foot breakdown in the next section lets you run the math against your own plan.
Partial damage is a different financial question than total loss, and it deserves its own set of numbers.
A full interior renovation prices well below ground-up construction. If your house survived and you're deciding between repairing it and taking it down, that's a conversation worth having before you commit either way.
For preliminary planning only, a ground-up custom home rebuild in Altadena may be considered in a $550–$800-per-square-foot range, and where you land inside that range comes down to three levels of finish.
Run it against your own plan, and it gets concrete. A 2,000 square foot home spans roughly $1.1 million to $1.6 million across the three tiers. At 2,400 square feet, the same span runs about $1.3 million to $1.9 million. At 3,000, you're looking at $1.65 million and up.
Two things worth knowing about how these ranges behave. Smaller homes cost more per square foot, not less, because mobilization, utility coordination, and agency requirements don't shrink with the footprint.
Two Altadena homes with identical square footage can differ by hundreds of thousands of dollars. On a 2,000 square foot house, the spread between the lowest and highest finish level alone is about $500,000, and finish is only one of the following.
The settlement gap is the difference between what your insurance policy pays out and what it actually costs to rebuild your home today, and for many Altadena homeowners it's real and worth several hundred thousand dollars.
The gap is rarely one problem. It's usually three arriving at once.
None of that means your project doesn't work. It means you want to know the size of the gap before you fall in love with a floor plan, not after.
These three answers change what's realistic for your rebuild more than almost anything else on the page.
Most Altadena homeowners close a settlement gap one of three ways, and often with some combination of them.
We work with insurance proceeds on nearly every rebuild we have in construction right now. Where there's a shortfall, homeowners typically cover it with savings, with bridge financing, or by staging scope so the house is complete and livable at move-in with clearly defined later phases. That third option is the one people tend not to know about, and it's often the one that makes the project work.
Rebuilding is the rare chance to correct everything about a house that never quite worked, and most of the families we're building for are taking it.
The changes that come up again and again in Altadena rebuilds are almost never about square footage. They're about how a house actually gets used.
Work through these before you commit to a full set of drawings.
☐ Pull your full policy, including the declarations page and every endorsement
☐ Get written confirmation of your dwelling, extended replacement cost, ordinance or law, and ALE limits
☐ Confirm your lot's status: flat or sloped, grading and retaining conditions, utility service
☐ Set a realistic all-in budget that includes design, engineering, permits, and fees, not just construction
☐ Decide your square footage target before you decide your finish level
☐ Talk to a builder about cost while your plans are still changeable
☐ Agree with your spouse or partner on the top three priorities and the one thing you'd cut first
We price from a cost database built on our own Altadena and Pasadena projects, and we show homeowners the line items behind the number.
The question we hear most is some version of "how do I know your number is real." Our answer is that you get to watch it get built.
Miguel Pedraza, our founder, is on every project weekly at minimum. Our project manager and site superintendent run the day-to-day, and updates reach you on a schedule instead of when you call and ask.
The $1.25 million–$1.75 million and $550–$800-per-square-foot figures are preliminary planning ranges subject to the assumptions and exclusions above. They are not quotes or guaranteed costs. Active-project benchmarks are comparisons rather than completed final prices. Hillside lots, larger homes, and premium finishes may require more.
Coverage limits were usually set against older replacement costs, and rebuilding to current California code costs more than replacing what was there. Post-fire demand on labor, materials, and permitting adds to it. The difference is the settlement gap, and knowing its size early is what lets you plan around it.
Design and engineering, permitting, and construction need separate planning allowances. The 8–12-month construction example is preliminary after permits and start requirements are satisfied; it excludes design and permitting. Agency review, procurement, site conditions, utilities, inspections, funding, and changes may extend timing. No completion or move-in date is guaranteed.
Usually yes, within current zoning and code, and most homeowners change something. Reconfiguring the plan, adding square footage, or adding an ADU are all common. Each affects both cost and review timeline, which is why it's worth pricing early.
No, and there's a good argument for the reverse. Bringing a builder in during early design means cost feedback while the plan is still flexible. We work with outside architects and collaborate with one you've already hired.
Yes. Access, grading, retaining, foundation design, and soil export all scale with slope, and those costs land before any of the house you can see. Hillside building is a large share of what we do, and we'd rather price it honestly at the start than discover it midway.
The most useful thing you can do right now is get a real number in front of you, because almost every other decision about your rebuild follows from it.
Our 2026 Design-Build Cost Guide discusses preliminary planning investment ranges for custom homes, whole home remodels, additions, and ADUs across Altadena and greater Pasadena, with the finish levels that sit behind each tier.
When you're ready to talk it through, reach out to us and we'll walk your property with you and tell you what we see.
If you are planning an Eaton Fire rebuild, share the property address and whatever records or plans you currently have. Moūnte Studio can review the project stage, identify the information needed for a productive next conversation, and explain whether its team may be a fit.