645 47th Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 645 47th Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 49 permits, 21 not closed, and 11 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 645 47th Avenue at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
21 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Aug 2026Issued
Revision to bpa# 202608146600 - remodel powder room, like for like, as well.
- Otc alterations permit Aug 2026Issued
Kitchen like for like, no structural changes. replace cabinets, sink dishwasher. bathroom remodel like for like, no structural changes. replace toilets (2), sinks (2), replace fan.
- Otc alterations permit Dec 2025Complete
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
- Otc alterations permit Sep 2025Complete
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
- Otc alterations permit Jul 2023Complete
Replacing (1) full frame quad siding door. (e) vinyl (n) vinyl. not street visible.
- Otc alterations permit Apr 2023Complete
Re-roofing. tear off. install app base t sheet. install flintlastic sta modified bitumen. install flintlastic gta modified bitumen.
- Otc alterations permit Oct 2014Issued
Street space
- Additions alterations or repairs Oct 2014Complete
Seismic retrofit for soft level. add straps, hold downs, sds screws, clips, plywood, gypsum board, blocking and anchor bolts.
- Otc alterations permit Jul 2012Complete
Install one sliding patio door into (e) door opening. max u-factor .40
- Otc alterations permit Apr 2012Complete
Replace (2) windows fiberglass frame match existing not facing street.
- Otc alterations permit Apr 2012Issued
Reroofing
- Otc alterations permit Dec 2011Complete
Remodel (e) kitchen & bath in street level at guest space with cooking facilities. no wall relocation. permanently installed lights in bath shall be high efficacy or controlled by occupancy sensor. a min. of 50% of the total rated wattage of lighting in kitchen shall be high efficacy.
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
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
3,300 ft
Lafayette Elementary (3,300 ft), Washington (George) High (5,000 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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645 47th Avenue is in San Francisco.
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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 47th Avenue
All addressesViewing recommendations
What's worth checking in person before deciding.
- Semi-detached or row house: the shared wall matters. Listen from the room adjoining the neighbor's side and ask whether any structural work has been done there.
- This is a house, not an apartment. Check the lot boundaries, car access, and how water drains from the yard after rain, including whether the neighboring lot sits higher and could send water toward the property.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- Check the roof, gutters, and downspouts for signs of leaks or recent repairs, especially if it has rained recently.
- Knock on a neighboring gate and ask about noise, pets, flooding, or other issues common in the area.
- Ask to see the construction documents (permit, sign-off) and check for visible cracks on the facade or in the attic/basement.
- Check the condition of the fence, yard, and sidewalk out front: who is responsible for upkeep, and whether there are any boundary disputes with neighbors.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.