4 Heritage Avenue, San Francisco
Estimated number, map position is approximatetechnical data · neighborhood and transit
Quick answers
- Does 4 Heritage Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 27 permits, 7 not closed, and 5 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 4 Heritage Avenue at risk for?
- FEMA's National Risk Index rates the area very low overall.
Permits and code violations
7 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Sep 2026Issued
Like in kind maintenance & repair of decks coatings @ 15 units-237 rey, 257 rey, 271 rey, 273 rey, 281 rey, 295 rey, 298 schwerin + 256,228, 208 schwerin, 1075 sunnydale, 15 garrison, 11 towerside, 21 heritage.
- Otc alterations permit Jul 2026Issued
Reroofing no hot works
- Otc alterations permit Jun 2026Issued
Re-roofing no hot works: recover existing single layer roof system w/new t24 compliant composition shingles.
- Otc alterations permit Jun 2026Issued
Re-roofing no hot works: recover existing single layer roof system w/new t24 compliant cool roof rated composition shingles.
- Otc alterations permit Aug 2020Issued
Fire only as-built drawings permit submission for the emergency fire alarm panel replacement job done under pa# 201803163804. submission done due to the requirement of the sffd district inspector. (no added devices)
- Otc alterations permit Mar 2018Issued
Fa panel replacement - emergency replacement of the fire alarm panel. there is no record plan or ul certificate for the (e) system
- Additions alterations or repairs Jan 2000Complete
One-stop, install new fire alarm system
- Additions alterations or repairs Jan 2000Complete
One-stop, install new fire alarm system
- Additions alterations or repairs Jan 2000Complete
One-stop, install new fire alarm system
- Additions alterations or repairs Aug 1999Complete
One stop: fire sprinkler for pa 9815986
- Additions alterations or repairs Aug 1999Complete
One stop: fire sprinkler for pa 9815988
- Additions alterations or repairs Aug 1999Complete
One stop: fire sprinkler for pa 9815987
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Very Low
No single natural hazard ranks high for this area.
FEMA National Risk Index, census tract
Superfund site
2.6 mi
Hunters Point Naval Shipyard (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
3 within 1,650 ft
Nearest: Nationwide Papers, 450 Allan (1,050 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Toxic release facility
2,100 ft
Pacific Lithograph Co Inc 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
0 ft
230 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
Nearest public schools
1,200 ft
Visitacion Valley Elementary (1,200 ft), Bayshore (1,650 ft), Visitacion Valley Middle (2,250 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
6.6 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 Heritage 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.
- 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.
- 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.
- 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.
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.