Peninsula Real Estate Guide
Construction Loans: Financing a Teardown or Ground-Up Build on the Peninsula
How building financing genuinely differs from a standard mortgage, and what it actually costs in 2026
|
20% to 25% Typical Down Payment |
7% to 9% Typical Interest Rate, 2026 |
$450 to $700 Per Sq Ft, Bay Area Build Cost |
One-Time Close The Preferred Structure Locally |
If you’re pursuing a full teardown rebuild or a ground-up custom build on the Peninsula, standard mortgage financing doesn’t apply. Construction loans work genuinely differently, and understanding the structure before you commit to a lot or a builder saves real confusion later.
Why This Is a Different Kind of Loan
A traditional mortgage lends against a home that already exists, appraised and handed over in full at closing. On day one of a build, there’s nothing standing yet, so a construction loan works differently in three specific ways: it lends against the projected finished value based on your plans and builder’s contract, it releases funds in stages called draws tied to verified construction milestones, and you pay interest only on the amount actually drawn, not the full loan amount, during the build itself.
One-Time Close vs. Two-Close Structures
| Structure | How It Works |
| One-time close (construction-to-permanent) | One closing, one set of closing costs; automatically converts to a permanent mortgage when construction finishes |
| Two-close | Separate construction loan, then a separate refinance into permanent financing once the home is complete |
Why One-Time Close Matters More in a High-Rate Environment
Given Bay Area construction costs of roughly $450 to $700 per square foot and typical build timelines of 12 to 18 months, a one-time close structure lets you lock your permanent interest rate at the very start of the project. That protects you from rate increases during the build itself, a real risk given how much rates have moved even within 2026 alone.
What Lenders Actually Require
| Typically 20% to 25% down on total project cost, land plus construction combined, not just the build alone |
| If you already own your lot free and clear, its equity can often count directly toward your required down payment |
| A licensed, insured general contractor with a signed fixed-price or cost-plus contract, not an owner-builder arrangement |
| Cash reserves beyond the down payment, since lenders want to see you can weather cost overruns during the build |
Government-Backed Options Worth Knowing About
VA construction loans allow eligible veterans to build with $0 down, though relatively few lenders actually offer this specific product, and it requires a VA-approved builder. FHA construction loans require lower down payments than conventional financing but are capped by FHA loan limits, which run $1,149,825 in high-cost Bay Area counties for 2026, a ceiling many Peninsula construction projects, particularly full teardown rebuilds in San Carlos or Belmont, will exceed given local land and construction costs combined.
A Different Path for ADU-Scale Projects
If you already own your home and are adding a detached ADU rather than a full teardown, a traditional construction loan often isn’t the most practical route. A HELOC, drawing against existing home equity as the project progresses, or a cash-out refinance are both common alternatives that avoid the higher rates and stricter draw-schedule requirements of a ground-up construction loan.
Key Takeaway
A construction loan for a full Peninsula teardown or custom build genuinely runs on different terms than a standard mortgage: larger down payments, higher rates, and a draw-based disbursement schedule. A one-time close structure is worth prioritizing given how much rates can move during a 12 to 18 month build.
Frequently Asked Questions
How much down payment does a construction loan actually require?
Typically 20% to 25% of total project cost, though land equity can often count toward that requirement.
Why are construction loan rates higher than a standard mortgage?
They reflect the higher risk lenders take on before a finished, appraisable home exists, generally running 7% to 9% in 2026.
What’s the advantage of a one-time close?
It locks your permanent mortgage rate at the start of the project, protecting you from rate increases during a lengthy build.
Is a construction loan the right tool for a smaller ADU project?
Often not; a HELOC or cash-out refinance is frequently a more practical, lower-cost option for ADU-scale projects.
| Related Reading | |
| Teardown and Land Value: When a Peninsula Lot Is Worth More Than the House | Understand the land side of this equation before financing the build. |
| New Construction vs. Resale on the Peninsula | Compare the full economics of building against buying resale. |
| San Carlos’s ADU Boom: Real Local Costs and What They Can Earn | See the more practical financing path for ADU-scale projects. |
| Interest Rates in 2026: What They Mean for Your Purchasing Power | Understand the broader rate environment shaping construction loan pricing. |
Considering a Teardown or Custom Build?
I can help you evaluate land value and connect you with lenders experienced in Peninsula construction financing.
Holly Noto | Coldwell Banker Realty | DRE#01244498, DRE#01908304
580 El Camino Real, San Carlos, CA 94070
650.544.6185 | [email protected]
Rate and cost figures reflect general 2026 California construction lending industry reporting and vary significantly by lender, credit profile, and project scope. This content is not lending advice; consult a licensed construction loan specialist for terms specific to your project.
