640 46th Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 640 46th Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 43 permits, 10 not closed, and 3 violations.
- 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 640 46th Avenue at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
10 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Oct 2024Complete
Revision to pa# 202312112256, remove 1 skylight, add 2 skylights over stairs, remove 2 windows at rear wall. change window to sliding door at rear wall.
- Otc alterations permit Dec 2023Complete
1/f build out including bedroom, family room, bathroom and laundry closet. new interior stairs. structural work included.
- Otc alterations permit Aug 2023Complete
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
- Otc alterations permit Apr 2019Complete
Bathroom remodel: remove old tile lath, plaster and bathtub. replace with new fixture (tub, sink) retile. new fixture as needed. no structural under this permit.
- Otc alterations permit Jan 2016Complete
Repair front stair membrane in-kind under 50%.
- Otc alterations permit Nov 2015Complete
Remove stucco to the front of building. repair any dry rot and install new lathe and plaster and stucco to match existing.
- Otc alterations permit Aug 2015Complete
Open & demo named interior walls for structural reviw. not full demo. only small areas for structural observation.
- Additions alterations or repairs Nov 2014Complete
Add 3rd story addition to (e) 2 story residence, a (n) stair on north side of 2nd floor will access (n) 3rd story which will contain 3 bedrooms and 2 baths.(n) roof deck on (e) roof at rear pop-out.
- Otc alterations permit Aug 2014Complete
Replace 1 window in kitchen, same location, replace 1 door in office/kitchen area
- Otc alterations permit Aug 2014Complete
Remodelling of kitchen &office (part of kitchen with area approx. 24 sf): replace kitchen wall & base cabinets, replace countertop, sheetrock at (e) walls & ceilings. replace floor finish in kitchen & office. replace hood, dishwasher. add insultation at exterior wall as required.
- Otc alterations permit May 2014Cancelled
Replace kitchen cabinets & appliances
- Otc alterations permit May 2014Complete
Tear off existing wood siding on right side wall, install hardi siding, siding visable from street. no structural changes
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Relatively Moderate
Highest for this area: earthquake. These drive insurance cost here.
FEMA National Risk Index, census tract
Nearest active fault
6.2 mi
Serra fault zone, slip rate unspecified. Ask about seismic retrofit and earthquake insurance.
USGS Quaternary Fault Database
Quakes M4.5+ since 1970
1 within 30 mi
Every recorded earthquake of magnitude 4.5 or stronger within 30 miles.
USGS earthquake catalog
Leaking fuel tanks
1 within 1,650 ft
Nearest: Commercial, 101 Point Lobos Ave (1,450 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
2,850 ft
Lafayette Elementary (2,850 ft), Washington (George) High (4,550 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 46th 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.
- 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.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- 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.
- 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.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
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