
Rule 1: The loan limit caps you at $1,249,125
For 2026, San Mateo County's FHA loan limit is $1,249,125 for a single-family home, the same ceiling the high-cost conforming loans hit. The median sale price in South San Francisco was $1.3M last month. That's just over the cap.In practice, this means a meaningful share of SSF inventory is technically out of reach for an FHA buyer unless you bring enough down payment to push the loan amount under $1,249,125. On a $1.3M home, you'd need to put down about $51,000 just to hit the FHA limit, and that's before the 3.5% minimum kicks in on top. For most first-time buyers, the workable inventory sits below median price, not above.Rule 2: FHA appraisers walk the property looking for safety issues
FHA isn't a vanilla appraisal. The appraiser is checking the home against Minimum Property Requirements, and a long list of items can flag the property and stop the loan until a seller fixes them. The most common issues:- Peeling, chipping, or deteriorated paint on homes built before 1978 (lead-paint risk, requires remediation before close)
- Missing or unstable handrails on stairs
- Roof with less than two years of remaining life
- Visible water damage, mold, or moisture in walls, ceilings, or crawl spaces
- Non-functional plumbing, electrical, or HVAC, including corroded drains or low water pressure
- Exposed or hazardous building materials
Rule 3: Condos must be FHA-approved
If you're shopping condos or townhomes, FHA approval is its own rule and its own headache. Only about 10% of California condos are FHA-approved. That's not a typo. The HOA has to apply, get on the HUD-approved list, and meet a checklist that includes:- At least 10% of monthly assessments contributed to reserves (Fannie Mae's threshold rises to 15% in January 2027, so even conventional buyers should care)
- A healthy majority of units owner-occupied
- No more than 15% of units 60+ days delinquent on dues
- No major pending litigation against the HOA