1901 48th Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 1901 48th Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 15 permits, 4 not closed, and 10 violations, 1 open.
- What is the 2026 conforming loan limit in San Francisco County?
- $1,249,125 for a single-unit home, per FHFA. Larger loans are jumbo loans.
- Is radon a problem here?
- EPA radon zone 2, moderate potential.
- What natural disasters is 1901 48th Avenue at risk for?
- FEMA's National Risk Index rates the area relatively high overall, with elevated earthquake risk.
Permits and code violations
4 permits not closed out. Unfinished permits pass to the next owner. 1 open violation.
- Otc alterations permit Oct 2026Issued
1)remodel existing kitchen, bath room, construct one new bathroom, and voluntary upgrade partial ceiling joists at 2nd floor. 2)construct 2 bedroom, one bathroom, family room and install wet bar at ground floor.
- Otc alterations permit Oct 2020Complete
Reroofing
- Otc alterations permit Oct 2012Complete
One kitchen and one bathroom remodel. replace furniture and water heater. replace window. total 6
- Otc alterations permit Jan 2009Issued
Replace 4 windows in kind into existing opening. visable from street. aluminum to vinyl. no structural changes. u factor 0.67 max.
- Otc alterations permit Nov 2006Complete
Reroofing
- Otc alterations permit Sep 2002Complete
Rplace 2 double sets of casement in front
- Otc alterations permit Aug 2000Complete
Reroofing
- Otc alterations permit Oct 1997Complete
Reroofing
- Otc alterations permit Nov 1995Expired
Reroofing
- Otc alterations permit Aug 1992Complete
Install 2 alum. windows in existing frames
- Otc alterations permit Jul 1992Complete
Reroofing
- Otc alterations permit Mar 1990Complete
Aluminum windows
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Relatively High
Highest for this area: earthquake. These drive insurance cost here.
FEMA National Risk Index, census tract
Leaking fuel tanks
1 within 1,650 ft
Nearest: Tosco (Unocal) Station #3390, 3701 Noriega St. (1,400 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Radon potential
Moderate
Average indoor levels of 2 to 4 pCi/L. EPA still suggests testing ground-floor and basement units.
EPA and USGS Geologic Radon Potential Map
Nearest public schools
1,550 ft
Noriega Children Center (1,550 ft), Sunset Elementary (2,300 ft), Key (Francis Scott) Elementary (3,050 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Conforming loan limit 2026
$1,249,125
San Francisco County. Mortgages up to this amount qualify for Fannie Mae and Freddie Mac pricing. Above it, the loan is a jumbo with stricter terms.
FHFA Conforming Loan Limit Values, one-unit
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Who lives and works in San Francisco
Venture capital, AI labs and the highest founder density in the country
San Francisco runs on company building. Engineering and product salaries set the price floor, offices cluster in SoMa and the Mission, and demand moves with funding cycles rather than with the school calendar.
- $141,446
- median household income
- 19.6%
- residents aged 25 to 34
- 38%
- households that own their home
What pays the bills
- Software and AI
- Venture capital
- Biotech
- Professional services
- Tourism
Who anchors the economy
OpenAI · Salesforce · Stripe · UCSF · Y Combinator
The market is shaped around
- Founders and engineers
- Early career tech workers
- People who move for a company
More on 48th Avenue
All addressesViewing recommendations
What's worth checking in person before deciding.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
- Ask for the latest maintenance bill from a winter month, not a summer one: that's where the real cost of living there shows up.
- Ask specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
The year built, height regime, structure, and elevator for this address are being indexed right now, city by city. Save the page and check back: it fills in over time. If you live here, you can fill it in yourself in a minute by leaving a review.