321 Peninsula Avenue, San Francisco
Estimated number, map position is approximatetechnical data · neighborhood and transit
Quick answers
- Does 321 Peninsula Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 21 permits, 6 not closed, and 2 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 321 Peninsula Avenue at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
6 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Apr 2021Complete
2/f: legalize media room, wall, bath. no other work
- Otc alterations permit Oct 2017Complete
G/f: make 1 bedroom & storage (legalize) by adding electrical, replacing walls with metal studs & drywall, insulation.
- Otc alterations permit Sep 2017Complete
Kitchen fire- remodel kitchen bathroom dining room including electrical plumbing drywall cabinets counters new windows at the front façade shall be wood interior with aluminum cladding all others not visible to be vinyl.
- Otc alterations permit Jul 2017Issued
Remove and dispose lead causing plaster for repairs (interior) in living room, dining, kitchen, bathroom and 2 bedrooms.
- Otc alterations permit Apr 2017Complete
Interior remodeling on 1st floor - add 1 bedroom, 1 family room, legalize (e) bedroom & full bath @ ground floor.
- Otc alterations permit Aug 2013Complete
Relocate both (e) furnace & (e) water heater, (e) water heater replace w/tankless, replace in-kind 2-ground floor windows, install (n) 3x3 window. construct 36" wide door openign @ east wall, additoin of 1-bedroom, 1 storage room, 1 laundry room, (n) bathroom @ gorund level.
- Otc alterations permit Jan 2013Issued
Main floor kitchen remodel, reconfigure interior walls, convert (e) bathroom to master suite, add one additional bedroom & new bath. comply with complaint #201266041
- Otc alterations permit Apr 2012Complete
Reroofing
- Otc alterations permit Feb 2012Complete
Section i items 4a, break out existing front tile stairs, replace wood members, break out stucco, install concrete stairs, patch stucco (8a), remove & replace damaged wood members (11a), repair damage siding, less than 50% repair of stairs.
- Otc alterations permit Jan 2009Issued
Sidewalk permit only
- Otc alterations permit Jul 2003Complete
Kchn and bath remodel at 2nd floor/repair damage drywall and add non bearing wall at 2nd floor only
- Otc alterations permit Jun 2002Complete
Add new door to exterior rear deck in (e) window opening
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
5.4 mi
San Andreas fault zone, slip rate greater than 5.0 mm/yr. Ask about seismic retrofit and earthquake insurance.
USGS Quaternary Fault Database
Superfund site
1.9 mi
Hunters Point Naval Shipyard (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
9 within 1,650 ft
Nearest: Macor Inc./Norcal Waste System, 401 Tunnel Ave (1,100 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
950 ft
Blanken Ave Parking Lot Former Schlage Lock Facto. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Toxic release facility
1,400 ft
Schlage Lock Co and 1 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
High-voltage line
850 ft
115 kV line run by PACIFIC GAS & ELECTRIC COMPANY.
HIFLD transmission lines
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
Wildfire risk
Very Low
Wildfire risk is low enough that standard home insurance usually covers it.
FEMA National Risk Index
Nearest public schools
3,100 ft
KIPP Bayview Academy (3,100 ft), Visitacion Valley Elementary (3,300 ft), El Dorado Elementary (3,600 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
6.5 mi
San Francisco International (SFO). Aircraft may be audible under approach paths.
FAA large-hub airports
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 Peninsula 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.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- 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.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
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