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Fairfax is a small, tight-inventory town in Marin County. Homes here don't come cheap, and fixed-rate payments can be brutal.
HousingWire just flagged that ARM demand is shifting as 30-year fixed rates hit 6.57%. In a high-price market like Fairfax, that spread matters.
620 (700+ preferred)
Min Credit Score
5, 7, or 10 Years
Fixed Period Options
Typically 0.5–1%+ lower
Rate vs. 30-Yr Fixed
7/1 ARM
Most Common ARM
Conforming & Jumbo
Works With
Adjustable Rate Mortgages (ARMs) in Fairfax
Most ARMs require a 620+ credit score. To get competitive initial rates in Marin, plan on 700 or above.
Debt-to-income ratio caps apply. Lenders also qualify you at the fully-indexed rate, not just the teaser rate.
Local decision guide
Use this guide to connect adjustable rate mortgages (arms) eligibility, lender expectations, and local market factors before comparing payment options in Fairfax.
Fairfax is a small, tight-inventory town in Marin County. Homes here don't come cheap, and fixed-rate payments can be brutal.
HousingWire just flagged that ARM demand is shifting as 30-year fixed rates hit 6.57%. In a high-price market like Fairfax, that spread matters.
Most ARMs require a 620+ credit score. To get competitive initial rates in Marin, plan on 700 or above.
Most retail banks offer only cookie-cutter ARMs. Wholesale lenders give us access to portfolio ARMs with tighter margins and better caps.
ARM products vary widely. Index type, margin, and rate caps all affect your long-term risk. Not every lender is upfront about those details.
An ARM makes sense if you plan to sell or refinance before the fixed period ends. In Fairfax, most buyers don't stay in the same loan for 30 years.
The 7/1 ARM is the most common fit here. You get seven years of fixed payments, then annual adjustments after that.
A 30-year fixed gives you certainty. An ARM gives you a lower initial rate and lower early payments — often by a full percentage point or more.
Jumbo buyers in Fairfax benefit most. A lower ARM rate on a large balance saves significant cash in years one through seven. Rates vary by borrower profile and market conditions.
Fairfax homes often push into jumbo territory. ARMs are especially common in jumbo deals where the rate savings are largest.
Marin's market has historically seen steady appreciation. Some buyers use ARM savings to build equity faster in early years.
Common options are 5, 7, or 10 years fixed. The 7/1 ARM is the most popular choice for Fairfax buyers.
Your rate changes based on a market index plus a lender margin. Rate caps limit how much it can move each adjustment period.
Risk depends on your timeline. If you sell or refinance before the fixed period ends, you avoid adjustment risk entirely.
Yes. Jumbo ARMs are widely available and often where the savings are biggest given Marin County loan sizes.
Lenders require at least 620. For the best initial rates on a Marin-sized loan, aim for 700 or higher.
As of April 2026, ARM rates are running below 30-year fixed rates. Rates vary by borrower profile and market conditions.