BuildingCensus

Biggest building emitters in Seattle

Top 100 by reported greenhouse-gas emissions under Seattle Energy Benchmarking Ordinance (SMC 22.920), latest disclosure year per building. Seattle's Building Emissions Performance Standard (2023) sets declining carbon targets for buildings over 20,000 sq ft, with penalties for non-compliance beginning in the 2030s.

Top 100 by reported emissions

#BuildingCityEmissionsScoreFloor area
1UW - UNIVERSITY OF WASHINGTON SEATTLE CAMPUS (Master)Seattle581,655 tCO₂e–—15,216,474 sq ft
2BOEING PLANT 2 ISAL (BLDG 2-122)-North Boeing Field CampusSeattle18,907 tCO₂e–—2,026,324 sq ft
3SEA-MAR COMMUNITY CARE CENTER (NURSING HOME)Seattle10,503 tCO₂e–—49,770 sq ft
4University of Washington Medical Center (UWMC)Seattle10,302 tCO₂eB831,739,802 sq ft
5HARBORVIEW MEDICAL CENTER - CampusSeattle10,061 tCO₂eA951,926,841 sq ft
6LA FITNESS CENTERSeattle10,033 tCO₂e–—45,000 sq ft
7WASTE MANAGEMENT MAINTENANCE SHED, BLDG ASeattle7,850 tCO₂e–—26,232 sq ft
8SEATTLE CHILDREN'S HOSPITAL (MAIN CAMPUS)Seattle6,961 tCO₂eD45879,000 sq ft
9SWEDISH MEDICAL CENTER FIRST HILL - CampusSeattle6,899 tCO₂eA1002,080,885 sq ft
10FHCRC - Weintraub/Hutchinson/Thomas Bldgs combinedSeattle4,658 tCO₂e–—603,009 sq ft
11SWEDISH MEDICAL CENTER CHERRY HILL - CAMPUSSeattle4,353 tCO₂eA85597,519 sq ft
12VIRGINIA MASON - Central PavilionSeattle4,033 tCO₂eB77374,466 sq ft
13KAISER PERMANENTE CAPITOL HILL - CampusSeattle3,595 tCO₂e–—905,911 sq ft
14SEATTLE UNIVERSITY (MAIN CAMPUS)Seattle3,447 tCO₂e–—2,099,379 sq ft
15UW NORTHWEST HOSPITAL & MEDICAL CENTER - CAMPUSSeattle2,983 tCO₂eD27668,027 sq ft
16ONNI SOUTH LAKE UNIONSeattle2,524 tCO₂eD541,546,084 sq ft
17HYATT REGENCY SEATTLESeattle2,524 tCO₂eB731,400,666 sq ft
18FOUR SEASONS HOTEL & 99 UNION STREET PRIVATE RESIDENCESSeattle2,473 tCO₂e–—455,883 sq ft
19SEATTLE CONVENTION CENTERSeattle2,449 tCO₂e–—1,842,925 sq ft
20HARBORVIEW MEDICAL CENTER - Ninth & Jefferson BldgSeattle2,440 tCO₂eD4726,103 sq ft
21Research & Training Building (HARBORVIEW) -Seattle2,434 tCO₂e–—181,930 sq ft
22WESTIN HOTEL (Parent Building)Seattle2,418 tCO₂eB71956,110 sq ft
23VIRGINIA MASON - Jones PavilionSeattle2,376 tCO₂eD35267,470 sq ft
24UW - HEALTH SCIENCES J-WINGSeattle2,336 tCO₂e–—170,719 sq ft
25SHERATON GRAND SEATTLE - (Parent Building)Seattle2,288 tCO₂eB751,083,197 sq ft
26FAIRMONT OLYMPIC HOTELSeattle2,269 tCO₂eC66544,174 sq ft
27SEATTLE PACIFIC UNIVERSITY - MASTER CAMPUSSeattle2,152 tCO₂e–—529,663 sq ft
28SEATTLE CHILDREN'S BUILDING CURESeattle2,010 tCO₂e–—575,826 sq ft
29WASHINGTON ATHLETIC CLUBSeattle1,984 tCO₂e–—305,548 sq ft
30SEATTLE CENTRAL COMMUNITY COLLEGE MASTER CAMPUS ID (Benchmarking)Seattle1,900 tCO₂e–—122,976 sq ft
31SWEDISH MEDICAL CENTER BALLARD - CAMPUSSeattle1,776 tCO₂eA93451,526 sq ft
32PROVIDENCE MT ST VINCENTSeattle1,773 tCO₂eD47371,257 sq ft
33SEATTLE CHILDREN'S HOSPITAL BUILDING HOPESeattle1,748 tCO₂eA88330,000 sq ft
34T-MOBILE PARK (SAFECO FIELD)Seattle1,721 tCO₂e–—1,172,127 sq ft
35SEATTLE CHILDREN'S HOSPITAL (JACK R MCDONALD BUILDING)Seattle1,720 tCO₂e–—299,070 sq ft
36UW Medicine Phase 3Seattle1,689 tCO₂e–—339,591 sq ft
37KING COUNTY COURTHOUSESeattle1,638 tCO₂eC60540,360 sq ft
38THE WESTIN BUILDING EXCHANGE (Office)Seattle1,571 tCO₂e–—429,405 sq ft
39THE JUNO BUILDINGSeattle1,486 tCO₂e–—443,118 sq ft
40KING COUNTY CORRECTIONAL FACILITYSeattle1,411 tCO₂e–—385,274 sq ft
41SEATTLE ART MUSEUMSeattle1,366 tCO₂e–—280,230 sq ft
42HORIZON HOUSESeattle1,249 tCO₂eA91756,740 sq ft
431208 EASTLAKE AVE E (Dendreon)Seattle1,166 tCO₂e–—128,408 sq ft
44MIRABELLA RETIREMENT COMMUNITYSeattle1,152 tCO₂eA96724,148 sq ft
45VIRGINIA MASON - Buck PavilionSeattle1,150 tCO₂eD2158,738 sq ft
46FIRST HILL MEDICAL PAVILION (HART FIRST HILL LLC)Seattle1,127 tCO₂e–—383,914 sq ft
47SEATTLE CANCER CARE ALLIANCE CLINICSeattle1,085 tCO₂e–—351,530 sq ft
48KRAKEN COMMUNITY ICEPLEX - NORTHGATE STATION LOT 6Seattle1,054 tCO₂e–—172,297 sq ft
49OLIVE 8 (MIXED USE)Seattle1,052 tCO₂eC63675,497 sq ft
50MOTIF SEATTLESeattle1,045 tCO₂eD41332,067 sq ft
51PUGET SOUND PLAZASeattle1,010 tCO₂eB71552,176 sq ft
52188 East BlaineSeattle1,006 tCO₂e–—310,584 sq ft
53401 TERRY AVE (INSTITUTE FOR SYSTEM BIOLOGY)Seattle1,003 tCO₂e–—258,505 sq ft
54GRAND HYATT SEATTLESeattle983 tCO₂e–—838,117 sq ft
55ARNOLD PAVILLIONSeattle980 tCO₂e–—225,982 sq ft
56PACIFIC PLACESeattle978 tCO₂e–—779,969 sq ft
57UW MEDICINE-LK UNION PHASE II ITHS.ORGSeattle954 tCO₂e–—436,497 sq ft
58CENTURYLINK FIELD-STADIUMSeattle938 tCO₂e–—1,913,640 sq ft
59CENTURYLINK: SEATTLE BELL PLAZASeattle925 tCO₂eB80791,396 sq ft
602200 WESTLAKESeattle904 tCO₂eA95516,407 sq ft
61PARKSHORESeattle888 tCO₂e–—225,629 sq ft
62KOMO PLAZA EAST & WEST BUILDINGSSeattle882 tCO₂e–—524,610 sq ft
631616 EASTLAKE BUILDINGSeattle857 tCO₂e–—281,306 sq ft
64HARBOR STEPS NE SITESeattle853 tCO₂eB771,256,335 sq ft
65EDGEWATER INNSeattle847 tCO₂eD23122,309 sq ft
66QFC INTERBAYSeattle844 tCO₂eD825,842 sq ft
67EXPEDIA - CampusSeattle829 tCO₂eA891,552,140 sq ft
68PLAZA 600 BUILDINGSeattle815 tCO₂eB81265,851 sq ft
69ALLEN INSTITUTE FOR BRAIN SCIENCE (AIBS)Seattle813 tCO₂e–—345,290 sq ft
70PORT OF SEATTLE BELL HARBOR COMPLEX & CONFERENCE - CAMPUSSeattle803 tCO₂e–—217,088 sq ft
71PORT OF SEATTLE- TERMINAL 91 (CAMPUS)Seattle788 tCO₂e–—1,012,278 sq ft
72BILL & MELINDA GATES FOUNDATIONSeattle785 tCO₂eB75920,598 sq ft
73HEARTHSTONE RETIREMENT HOME, THESeattle770 tCO₂eD52198,752 sq ft
74UNIVERSITY VILLAGE SOUTH BLDGSeattle763 tCO₂e–—305,025 sq ft
75SEATTLE WATERFRONT MARRIOTTSeattle740 tCO₂eD45293,030 sq ft
76CRISTALLA CONDOMINIUMSeattle737 tCO₂eD10248,225 sq ft
77DAY 1 TOWER AND SPHERES (Amazon)Seattle732 tCO₂eA931,599,230 sq ft
78SEATTLE TENNIS CLUBSeattle729 tCO₂e–—71,280 sq ft
79CAROLINE KLINE GALLAND HOMESeattle717 tCO₂eA93141,297 sq ft
80W SEATTLE HOTELSeattle715 tCO₂eC66333,176 sq ft
811201 EASTLAKE AVE E (ZymoGenetics)Seattle707 tCO₂e–—169,785 sq ft
82FIFTEEN TWENTY-ONE SECOND AVENUESeattle692 tCO₂eD23330,693 sq ft
83Brotman Building D: UW Medicine ResearchSeattle676 tCO₂e–—102,235 sq ft
84SOUTH SEATTLE COLLEGE - CAMPUS MASTER IDSeattle676 tCO₂e–—529,343 sq ft
85NORDSTROM DOWNTOWNSeattle673 tCO₂eA87693,450 sq ft
86EMBASSY SUITES- DOWNTOWN SEATTLESeattle670 tCO₂eA89680,770 sq ft
87THORNTON PLACE APTS BLD 2 (CHILD PROPERTY FOR #52046)Seattle666 tCO₂eC60124,642 sq ft
88MAGNUSON PARK CAMPUSSeattle659 tCO₂e–—564,258 sq ft
89STRATUS APARTMENTS- MIXED USESeattle655 tCO₂eC69614,765 sq ft
90CENTURY SQUARESeattle647 tCO₂eB77755,000 sq ft
91UW BENJAMIN HALL INTERDISCIPLINARY R&TSeattle641 tCO₂e–—143,439 sq ft
92RENAISSANCE MADISON HOTELSeattle640 tCO₂eC59460,902 sq ft
93INSIGNIA CONDOSSeattle635 tCO₂eD451,464,631 sq ft
94CENTRAL LINK OPERATIONS & MAINTENANCE - Sound TransitSeattle634 tCO₂e–—162,157 sq ft
95COSTCO 4TH AVE SSeattle632 tCO₂eC63158,415 sq ft
96SKYE AT BELLTOWNSeattle630 tCO₂eB84393,841 sq ft
97SODO URBAN WORKSSeattle625 tCO₂eD48188,681 sq ft
98PIER 57 BAY PAVILIONSeattle623 tCO₂e–—43,728 sq ft
991441 LAKE UNION CENTERSeattle614 tCO₂e–—103,697 sq ft
100FRYE ART MUSEUMSeattle613 tCO₂e–—47,699 sq ft

Frequently asked questions

Which Seattle building emits the most carbon?

UW - UNIVERSITY OF WASHINGTON SEATTLE CAMPUS (Master) reported 581,655 tCO₂e in its latest Seattle Energy Benchmarking Ordinance (SMC 22.920) disclosure — the highest in Seattle. Seattle's Building Emissions Performance Standard (2023) sets declining carbon targets for buildings over 20,000 sq ft, with penalties for non-compliance beginning in the 2030s.

Dataset updated . Source: Building Energy Benchmarking public disclosure.