A house in Greenbrae sold for an average of $2,525,000 in the first half of 2026, up from $2.2 million in the second half of last year. A few blocks away, along the path that follows Corte Madera Creek, a 1,236-square-foot townhouse-style condo on Corte Oriental listed earlier this year for $750,000. On paper, that gap looks like Greenbrae's version of an entry point. A buyer priced out of the hillside view homes can look at the creekside condos and think they've found the affordable way into a town where the average price per square foot climbed to $1,153 in the first half of the year.
The math on the sticker price is real. The math on the mortgage is not always the same math.
Condos and single-family homes in Greenbrae are not underwritten the same way, and the gap between them is not just about square footage or a shared wall. It is about who a lender is actually evaluating when the loan application comes in, and that difference has gotten sharper in 2026.
Two Owners, Two Rulebooks
When a lender underwrites a single-family home, they evaluate the borrower and the property. That's it. If the buyer's credit and income check out and the house appraises, the loan moves forward.
A condo purchase adds a second subject to the underwriting file: the building itself. Fannie Mae and Freddie Mac, which purchase the majority of conventional mortgages in the country, require lenders to review the entire homeowners association before they'll buy a loan secured by one of its units. That review looks at the HOA's reserve funding, its insurance coverage, its delinquency rate, and whether anyone is suing it. A buyer with excellent credit and a large down payment can still be denied conventional financing if the building itself fails that review.
This is the part that doesn't show up in a listing description. Two condos on the same block, priced within a few thousand dollars of each other, can lead to two completely different financing experiences depending on which HOA sits behind the door.
What Changed for Condo Buyers in 2026
The review got stricter this year. Fannie Mae's Lender Letter LL-2026-03 retired the Limited Review and Streamlined Review pathways that used to let buyers with larger down payments, typically 10 percent or more, skip a deep dive into the HOA's finances. Established condo projects of 11 units or more must now go through a Full Review regardless of how much the buyer puts down.
Six criteria determine whether a project passes that review:
- Budgeted reserves below 10 percent of annual assessment income (a threshold rising to 15 percent for applications dated on or after January 4, 2027)
- More than 15 percent of owners 60 or more days delinquent on HOA dues
- A single entity owning more than 20 percent of the units in larger projects
- More than 35 percent of the building allocated to commercial or mixed use
- Active litigation involving the HOA
- Inadequate insurance coverage for the building and common areas
Fail any one of these and the project is classified as non-warrantable. Conventional 30-year financing is off the table for every unit in the building, not just the one being sold. California has added its own wrinkle on top: SB 326, the state's balcony and elevated-walkway inspection law, has become one of the more common reasons lenders flag buildings this year, particularly in older HOAs that haven't documented a completed inspection or a funded repair plan for whatever the inspection found.
Where This Shows Up Along the Creek
Greenbrae's waterfront condo stock is exactly the kind of housing this review was built to scrutinize. Many of these buildings, tucked into small residential pockets on streets like Corte Oriental, Corte Real, Laderman Lane, and Elizabeth Circle, went up decades ago as small, self-managed complexes rather than large, professionally administered associations. One example: an eight-unit, self-managed building on Corte Real, built in 1977, changed hands a few years back for $775,000, a price that reflected the location (walking distance to Creekside Park, the Corte Madera Creek path, Marin General Hospital, and the Bon Air Center) more than anything about how the HOA was run.
Small and self-managed isn't automatically a problem. But it does mean fewer of the formal documents a lender's Condo Project Manager review is looking for: a current reserve study prepared by an independent professional, a standardized insurance renewal schedule, a paper trail showing the balcony and walkway inspections that SB 326 requires. A larger, professionally managed association is more likely to have all of that sitting in a file, ready to hand a lender. A five- or eight-unit building where owners split management duties informally is more likely to be figuring it out for the first time when a buyer's loan officer asks.
What the Gap Actually Costs
When a project fails review and is classified non-warrantable, the buyer's financing options narrow to portfolio loans or non-QM programs, the kind of financing a bank keeps on its own books instead of selling to Fannie Mae or Freddie Mac. Those loans come with different terms across the board.
| Conventional (warrantable building) | Portfolio or Non-QM (non-warrantable building) | |
|---|---|---|
| Down payment | As low as 10-20% | Typically 20-30%, sometimes 15% for strong credit under $1.5 million |
| Rate, mid-2026 average | Around 6.66% | Roughly 7.17% to 7.91% |
| Sold to secondary market | Yes | No, held by the originating lender |
| FHA eligible | Yes, if project has FHA approval | No |
On a $650,000 loan, the difference between a 6.66 percent rate and a 7.50 percent rate works out to roughly $358 more per month. That's the cost of financing the exact same unit, in the exact same building, simply because the association hadn't kept its paperwork current.
A condo's price tag tells you what the seller wants for the unit. It doesn't tell you which mortgage aisle you'll be shopping in.
The Documents That Actually Answer the Question
None of this needs to be a mystery before an offer goes in. Any lender can run a warrantability check on a specific building, usually within a few business days and at no cost, before a buyer writes a purchase offer. Fannie Mae also maintains a Condo Project Manager database that lenders use to check whether a project already has an approved status on file.
Beyond the lender check, a buyer or their agent can ask the HOA directly for a short list of documents: the most recent reserve study and how it was funded, the current delinquency rate among owners, meeting minutes from the past year, and confirmation of whether the building has completed its SB 326 balcony inspections. For a small, self-managed association, some of these documents may need to be requested rather than pulled from a management company's portal, which is worth building into the timeline before removing loan contingencies.
What This Means If You're Comparing a House to a Condo
The $2.5 million average sale price for a Greenbrae house and the $750,000 condo listing aren't wrong numbers. They're just answering different questions. The house price reflects what the market will pay for a piece of land and structure. The condo price reflects that, plus whatever financing terms the building happens to qualify for on the day you make an offer, which can shift the effective cost of ownership more than most buyers expect walking in.
For someone comparing a creekside condo to a hillside house in Greenbrae, the smarter first move isn't picking a number on a listing. It's finding out early which financing lane that specific building sits in, so the comparison you're making is the one that actually determines your monthly payment.
If you're weighing a Greenbrae condo against a single-family home, or trying to make sense of what a listing's price actually means for your financing, Holly Welch can help you sort through the HOA paperwork before you're deep into contract. Let's Connect.