Backup Generator Installation Cost in San Francisco, CA
Based on 85 backup generator installation building permits filed in San Francisco between 2015 and 2026, the typical declared project value is $15,000, with most landing between $5,500 and $25,000. These are real records from San Francisco's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Backup Generator Installation values over time in San Francisco
Median declared value moved from $18,500 in 2015 to $11,200 in 2023, down 39% over that span. Each year below is computed from the filings that actually cleared in San Francisco.
Recent backup generator installation permits in San Francisco
Actual filings from San Francisco's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-03-23 | $15,000 | remove of the existing rooftop generator on the existing equipment pad per ab017 |
| 2026-02-04 | $30,000 | install (1) 48kw diesel generator (240 gal), (1) fire extinguisher, (1) 4'x9' concrete pad |
| 2026-01-29 | $18,000 | provide a modification of the existing fire alarm system on the roof. add 2 single input m |
| 2026-01-22 | $25,000 | extend the vent on the (e) deisel fuel tank to 3ft above the parapet. replace the (e) fuel |
| 2025-11-25 | $28,350 | basement- f/a adds in basement and 4th to add f/a modules and relays for the new generator |
| 2025-10-08 | $3,500 | fire alarm modification: provide and install 2 duct detectors and 5 iams monitoring emerge |
| 2025-07-14 | $2,575 | basement - connect to and monitor generator ref pa 202308295528 |
| 2025-04-30 | $8,978 | 23rd fl- ref pa # 2024-1108-4657 disconnect fire alarm safety connections of (e) generator |
| 2023-10-18 | $16,000 | connect temp. generator to bldg tap box. cut over to temp generator. remove (e) supply & r |
| 2023-10-05 | $35,000 | revision to pa# 202206025416, install 1 article 202 optional standby deisel generator with |
| 2023-09-25 | $4,000 | basement and penthouse: fire alarm: 6 dual monitor modules to be added for proper coverage |
| 2023-06-09 | $11,200 | f/a system, (3)monitor mods, (2)dual monitor mods to monitor new nitrogen generator outsid |
| 2023-05-04 | $10,000 | 1st flr - addition to (e) fire alarm. (n) notification appliances will be added to provide |
| 2023-05-04 | $10,000 | 2nd flr - addition to (e) fire alarm. (n) notification appliances will be added to provide |
| 2023-05-04 | $10,000 | 3rd flr - addition to (e) fire alarm. (n) notification appliances will be added to provide |
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A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What backup generator installation actually costs in San Francisco comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from San Francisco's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a San Francisco homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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