668 45th Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 668 45th Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 29 permits, 14 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 668 45th Avenue at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
14 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Jan 2026Issued
Revision to pa #2025-1118-9918: interior remodel no work visible from street. removal of non load bearing partition walls at kitchen and infill bathroom door to create primary bath to primary bedroom. replace cabinets and finishes in bath & kitchen.
- Otc alterations permit Nov 2025Complete
Remodel 2 bathrooms and 1 kitchen.
- Otc alterations permit Sep 2025Issued
Replace existing wood siding like for like up to 300 sqft. front and side of the house, street visible.
- New construction wood frame Sep 2025Approved
Erect a new two dwelling unit with no basement, detached adu in compliance with state adu regulations per plannign code section 207.2.type v
- Additions alterations or repairs Jul 2020Issued
Add 3 bedrooms & 2 bath above existing 1 bedroom, 2 bath house with a 5' horizontal extension into the rear yard.
- Otc alterations permit May 2019Complete
Perform repairs per lingruen assoc termite report 82330. item 1d, 1e,5a,5c non street facing
- Otc alterations permit Jan 2017Complete
To comply with nov 201644506 remove flooring and partition at garage and pony wall. street parking will remain as part of this permit.
- Otc alterations permit Jul 2015Issued
Street space
- Otc alterations permit Aug 2013Complete
Re-roofing
- Otc alterations permit Apr 2013Complete
Interior remodeling. add two (n) master bedroom and storage at ground floor. add a (n) bathroom and remodel (e) bathroom at 2nd floor as per plan.
- Otc alterations permit Jul 2012Complete
Ground fl: remodel bathrm, enlarge living rm, upgrade windows to double pane. first flr: remodel kitchen, bath, add one bath, upgrade windows to double pane. remove non-bearing walls. backyard install trench drain.
- Otc alterations permit Mar 2009Complete
Reroofing
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 (1,400 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
2,550 ft
Lafayette Elementary (2,550 ft), Washington (George) High (4,250 ft), Presidio Middle (5,050 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 45th 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.
- 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.
- 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.
- 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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