Biggest building emitters in San Francisco

Top 100 by reported greenhouse-gas emissions under SF Environment Code Chapter 20, latest disclosure year per building. San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.

At a glance

Digital Realty Trust is San Francisco's biggest reported building emitter, at 20,380 tCO₂e in its 2025 disclosure. The 100 buildings ranked here reported 243,664 tCO₂e together — 44% of the 558,994 tCO₂e disclosed by all 2,509 San Francisco buildings.

Top 100 by reported emissions

#	Building	City	Emissions	Score	Floor area
1	Digital Realty Trust	San Francisco	20,380 tCO₂e	D36	673,926 sq ft
2	1101 Van Ness	San Francisco	10,200 tCO₂e	D37	777,383 sq ft
3	555 California	San Francisco	8,491 tCO₂e	B75	1,968,807 sq ft
4	Chase Center Arena	San Francisco	7,833 tCO₂e	–—	1,546,115 sq ft
5	500 BATTERY ST	San Francisco	6,190 tCO₂e	–—	1,779,579 sq ft
6	Hilton San Francisco Union Square	San Francisco	6,135 tCO₂e	C69	1,964,250 sq ft
7	601 Duboce Ave	San Francisco	5,782 tCO₂e	D3	282,965 sq ft
8	365 MAIN ST	San Francisco	5,613 tCO₂e	D15	240,291 sq ft
9	2351 CLAY	San Francisco	5,052 tCO₂e	–—	315,043 sq ft
10	One Market Plaza	San Francisco	4,406 tCO₂e	B80	1,870,178 sq ft
11	Kaiser Permanente San Francisco Hospital Campus	San Francisco	4,306 tCO₂e	B72	767,122 sq ft
12	Four Embarcadero Center	San Francisco	4,238 tCO₂e	B76	1,068,638 sq ft
13	China Basin	San Francisco	4,235 tCO₂e	–—	1,218,533 sq ft
14	FOUR SEASONS HOTEL	San Francisco	3,441 tCO₂e	–—	1,110,000 sq ft
15	CPMC MBH - MONTEAGLE MEDICAL CENTER	San Francisco	3,418 tCO₂e	D14	234,028 sq ft
16	Fairmont Hotel - San Francisco	San Francisco	3,383 tCO₂e	B83	804,136 sq ft
17	Salesforce Tower	San Francisco	3,121 tCO₂e	A95	1,679,267 sq ft
18	One Embarcadero Center	San Francisco	2,927 tCO₂e	A89	1,059,539 sq ft
19	1650 Owens Street	San Francisco	2,767 tCO₂e	–—	200,280 sq ft
20	Hyatt Regency San Francisco	San Francisco	2,750 tCO₂e	A93	882,977 sq ft
21	Park Tower 250 Howard	San Francisco	2,723 tCO₂e	B72	908,361 sq ft
22	The Exchange	San Francisco	2,688 tCO₂e	D52	1,057,149 sq ft
23	333 Market Street	San Francisco	2,607 tCO₂e	B74	756,925 sq ft
24	2675 Geary Blvd	San Francisco	2,560 tCO₂e	–—	494,418 sq ft
25	ARE 455 Mission Bay	San Francisco	2,548 tCO₂e	–—	219,588 sq ft
26	101 California	San Francisco	2,532 tCO₂e	A85	1,464,955 sq ft
27	71428A (UNION SQUARE MAIN)	San Francisco	2,434 tCO₂e	D47	922,758 sq ft
28	ARE San Francisco No. 26	San Francisco	2,432 tCO₂e	–—	171,427 sq ft
29	44 Montgomery	San Francisco	2,349 tCO₂e	B80	781,262 sq ft
30	525 Market Street	San Francisco	2,203 tCO₂e	A88	1,203,154 sq ft
31	Ritz Carlton San Francisco	San Francisco	2,178 tCO₂e	B81	450,654 sq ft
32	PARC 55 WYNDHAM San Francisco- Union Square	San Francisco	2,173 tCO₂e	A93	698,660 sq ft
33	Federal Reserve Bank of San Francisco	San Francisco	2,143 tCO₂e	C61	721,919 sq ft
34	201 Toland St	San Francisco	2,108 tCO₂e	D1	120,000 sq ft
35	1455 Market Street	San Francisco	2,048 tCO₂e	–—	1,339,547 sq ft
36	135 4th St	San Francisco	1,954 tCO₂e	–—	357,659 sq ft
37	Grand Hyatt San Francisco	San Francisco	1,859 tCO₂e	B77	545,418 sq ft
38	Intercontinental San Francisco	San Francisco	1,815 tCO₂e	A86	564,614 sq ft
39	Hotel Nikko	San Francisco	1,804 tCO₂e	A95	626,909 sq ft
40	One Montgomery Center Tower	San Francisco	1,803 tCO₂e	A86	1,096,276 sq ft
41	San Francisco Marriott Union Square	San Francisco	1,801 tCO₂e	C62	348,000 sq ft
42	Three Embarcadero Center	San Francisco	1,797 tCO₂e	A95	1,126,589 sq ft
43	Two Embarcadero Center	San Francisco	1,796 tCO₂e	A95	1,124,443 sq ft
44	ARE San Francisco No. 36	San Francisco	1,777 tCO₂e	–—	167,930 sq ft
45	318 SPEAR ST	San Francisco	1,769 tCO₂e	A98	1,500,000 sq ft
46	Westin St. Francis Hotel	San Francisco	1,761 tCO₂e	A100	1,315,996 sq ft
47	425 Market Street	San Francisco	1,744 tCO₂e	A91	1,171,073 sq ft
48	Pyramid Center	San Francisco	1,677 tCO₂e	–—	650,189 sq ft
49	4141 GEARY BLVD	San Francisco	1,674 tCO₂e	A88	305,726 sq ft
50	180-Stephens Institute	San Francisco	1,602 tCO₂e	–—	190,066 sq ft
51	One Sansome Street	San Francisco	1,596 tCO₂e	A85	738,880 sq ft
52	Clift Hotel	San Francisco	1,561 tCO₂e	B74	271,387 sq ft
53	203 Folsom St	San Francisco	1,553 tCO₂e	A97	1,102,810 sq ft
54	One Maritime Plaza	San Francisco	1,551 tCO₂e	B75	635,536 sq ft
55	Mark Hopkins 2	San Francisco	1,543 tCO₂e	D53	386,588 sq ft
56	301 MISSION ST	San Francisco	1,542 tCO₂e	C66	1,276,915 sq ft
57	Hyatt Regency SOMA	San Francisco	1,539 tCO₂e	A96	525,313 sq ft
58	2 Folsom	San Francisco	1,516 tCO₂e	B70	700,079 sq ft
59	S001-San Francisco	San Francisco	1,511 tCO₂e	C57	374,244 sq ft
60	Stonestown Galleria	San Francisco	1,509 tCO₂e	–—	440,707 sq ft
61	345 CALIFORNIA ST	San Francisco	1,505 tCO₂e	A88	814,226 sq ft
62	650 California Street	San Francisco	1,485 tCO₂e	B77	553,478 sq ft
63	375 NEWHALL ST	San Francisco	1,474 tCO₂e	–—	42,200 sq ft
64	Omni San Francisco	San Francisco	1,451 tCO₂e	C55	250,000 sq ft
65	The Olympic Club	San Francisco	1,449 tCO₂e	–—	259,424 sq ft
66	Rincon Center	San Francisco	1,433 tCO₂e	A89	1,013,978 sq ft
67	630 3RD ST	San Francisco	1,413 tCO₂e	D9	40,340 sq ft
68	San Francisco Museum of Modern Art	San Francisco	1,392 tCO₂e	–—	486,000 sq ft
69	The Ferry Building	San Francisco	1,389 tCO₂e	D36	274,094 sq ft
70	50 Fremont Center	San Francisco	1,369 tCO₂e	–—	955,092 sq ft
71	222 Second Street	San Francisco	1,362 tCO₂e	B70	529,356 sq ft
72	One Front Street	San Francisco	1,354 tCO₂e	A96	754,728 sq ft
73	900 North Point St.	San Francisco	1,330 tCO₂e	–—	204,867 sq ft
74	238 KING ST	San Francisco	1,310 tCO₂e	–—	1,212,969 sq ft
75	50 Beale	San Francisco	1,295 tCO₂e	B84	747,573 sq ft
76	500 Post	San Francisco	1,294 tCO₂e	B82	420,000 sq ft
77	NEMA SF	San Francisco	1,291 tCO₂e	A100	1,044,955 sq ft
78	The Palace Hotel	San Francisco	1,289 tCO₂e	A100	592,000 sq ft
79	Hearst Chronicle Building	San Francisco	1,287 tCO₂e	D32	230,000 sq ft
80	1550 Mission St	San Francisco	1,286 tCO₂e	D42	509,837 sq ft
81	560 Mission Street	San Francisco	1,280 tCO₂e	A89	778,782 sq ft
82	181 Fremont St	San Francisco	1,248 tCO₂e	–—	706,617 sq ft
83	Lakewood Apartments	San Francisco	1,227 tCO₂e	A96	853,363 sq ft
84	One Post Street	San Francisco	1,217 tCO₂e	B70	468,562 sq ft
85	1167 MARKET ST	San Francisco	1,206 tCO₂e	D42	332,221 sq ft
86	Hilton San Francisco - Financial District	San Francisco	1,203 tCO₂e	A88	443,430 sq ft
87	399 FREMONT ST	San Francisco	1,200 tCO₂e	B75	596,373 sq ft
88	Jewish Community Center of San Francisco	San Francisco	1,198 tCO₂e	–—	199,978 sq ft
89	595 Market	San Francisco	1,197 tCO₂e	B73	487,959 sq ft
90	45 Fremont	San Francisco	1,194 tCO₂e	A88	691,436 sq ft
91	Hills Plaza I - 345 Spear Street	San Francisco	1,187 tCO₂e	A88	578,104 sq ft
92	LeMeridien Hotel	San Francisco	1,184 tCO₂e	B77	281,581 sq ft
93	333 Bush Street	San Francisco	1,173 tCO₂e	B84	647,356 sq ft
94	The Landmark @ One Market	San Francisco	1,161 tCO₂e	A89	440,955 sq ft
95	225 Bush Street	San Francisco	1,157 tCO₂e	A95	527,986 sq ft
96	Russ Building	San Francisco	1,154 tCO₂e	A96	642,879 sq ft
97	Kaiser San Francisco Mission Bay MOB	San Francisco	1,152 tCO₂e	D48	221,660 sq ft
98	601 VAN NESS AVE	San Francisco	1,152 tCO₂e	A87	820,324 sq ft
99	Kaiser Permanente	San Francisco	1,140 tCO₂e	A99	423,160 sq ft
100	300 Toni Stone Crossing	San Francisco	1,127 tCO₂e	B75	321,000 sq ft

What do San Francisco's biggest-emitting buildings have in common?

By property type the list is led by commercial (86), mixed residential (9) and multifamily (4). Their average site EUI is 101.4 kBtu/ft², about 126% above the citywide average of 44.9 kBtu/ft². Combined they cover 70.7 million square feet; the median ranked building has 642,879 sq ft.

The ranking orders San Francisco's disclosed buildings by total reported greenhouse-gas emissions in their latest report year; figures far outside what a building of that type and size can emit are treated as data-entry errors and left out.

More San Francisco rankings and data

Frequently asked questions

Which San Francisco building emits the most carbon?

Digital Realty Trust reported 20,380 tCO₂e in its latest SF Environment Code Chapter 20 disclosure — the highest in San Francisco. San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.

About this data

Source: Existing Buildings Energy Performance Ordinance (SF Environment Code Chapter 20), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.

Cite as: BuildingCensus, “Biggest-emitting buildings in San Francisco”, https://buildingcensus.com/rankings/biggest-emitters/san-francisco (data as of October 2, 2026).