Least efficient large buildings in Seattle

Bottom 100 ENERGY STAR scores among buildings over 50,000 sq ft under Seattle Energy Benchmarking Ordinance (SMC 22.920) — the penalty-exposure watchlist. Flip side: most efficient →

Bottom 100 by ENERGY STAR score

#	Building	City	Score	Site EUI	Floor area
1	4545 15TH AVE NE	Seattle	D1	254.6 kBtu/ft²	113,944 sq ft
2	RONALD MCDONALD HOUSE A	Seattle	D1	61.2 kBtu/ft²	81,477 sq ft
3	SORRENTO HOTEL	Seattle	D1	367.5 kBtu/ft²	76,631 sq ft
4	EVERGREEN WHLSLE FLORIST (DEMOLISHED)	Seattle	D1	23.5 kBtu/ft²	66,968 sq ft
5	1201 BUILDING	Seattle	D1	174.4 kBtu/ft²	64,512 sq ft
6	RESTAURANT DEPOT	Seattle	D1	163.1 kBtu/ft²	63,225 sq ft
7	ANNALIESE	Seattle	D1	61.1 kBtu/ft²	58,152 sq ft
8	UNION GOSPEL MISSION ASSN - ADMIN BUILDING	Seattle	D1	77.1 kBtu/ft²	54,765 sq ft
9	SCCA - PROTON THERAPY CENTER	Seattle	D1	479.2 kBtu/ft²	53,575 sq ft
10	3101 WESTERN (FORMERLY AIRBORNE BLDG)	Seattle	D2	185.8 kBtu/ft²	253,103 sq ft
11	VIRGINIA MASON - Buck Pavilion	Seattle	D2	153.3 kBtu/ft²	158,738 sq ft
12	6TH & HOLGATE BUILDING	Seattle	D3	60.7 kBtu/ft²	149,881 sq ft
13	TRADER JOE'S & APARTMENTS	Seattle	D3	193.9 kBtu/ft²	97,229 sq ft
14	MADISON APTS- FIRE/WILL BE DEMO'D	Seattle	D3	173.1 kBtu/ft²	54,770 sq ft
15	HARBORVIEW MEDICAL CENTER - Ninth & Jefferson Bldg	Seattle	D4	165.7 kBtu/ft²	726,103 sq ft
16	BAYVIEW MANOR	Seattle	D4	88.7 kBtu/ft²	189,917 sq ft
17	1551 EASTLAKE BLDG.	Seattle	D7	167.4 kBtu/ft²	158,600 sq ft
18	MERRILL GARDENS - FAERLAND TERRACE	Seattle	D7	61.7 kBtu/ft²	95,117 sq ft
19	EMERALD LANDING I	Seattle	D9	100.1 kBtu/ft²	84,116 sq ft
20	CRISTALLA CONDOMINIUM	Seattle	D10	84.8 kBtu/ft²	248,225 sq ft
21	MERIDIAN	Seattle	D10	86.6 kBtu/ft²	179,678 sq ft
22	NORFOLK INDUSTRIAL BUILDING	Seattle	D10	50.5 kBtu/ft²	123,000 sq ft
23	PARK PLACE ASSISTED LIVING APTS	Seattle	D10	162.0 kBtu/ft²	121,635 sq ft
24	THE BROADVIEW CENTER	Seattle	D10	124.4 kBtu/ft²	93,397 sq ft
25	CAMLIN WORLDMARK HOTEL	Seattle	D10	104.5 kBtu/ft²	83,008 sq ft
26	PLYM0UTH ON STEWART APTS	Seattle	D10	108.9 kBtu/ft²	55,882 sq ft
27	SHANNON CONDOMINIUM	Seattle	D11	49.3 kBtu/ft²	97,160 sq ft
28	UNION ARMS	Seattle	D11	57.1 kBtu/ft²	67,304 sq ft
29	1223 SPRING STREET CONDOMINIUM	Seattle	D11	69.5 kBtu/ft²	66,924 sq ft
30	SUTTON PLACE CONDOMINIUM	Seattle	D12	101.9 kBtu/ft²	101,706 sq ft
31	TURNER CONSTRUCTION	Seattle	D12	90.5 kBtu/ft²	53,840 sq ft
32	PLYMOUTH CONGREGATIONAL CHURCH	Seattle	D13	90.5 kBtu/ft²	75,058 sq ft
33	SPINNAKER BAY CONDOMINIUM	Seattle	D13	46.9 kBtu/ft²	71,000 sq ft
34	PACIFIC IRON & METAL	Seattle	D13	68.2 kBtu/ft²	61,200 sq ft
35	AURORA HOUSE	Seattle	D13	89.2 kBtu/ft²	54,771 sq ft
36	BALLARD CARE & REHAB	Seattle	D14	165.1 kBtu/ft²	65,636 sq ft
37	A O SMITH CORP (includes #24845)- DEMOLISHED	Seattle	D14	17.1 kBtu/ft²	51,050 sq ft
38	WASHINGTON PARK TOWERS CONDOMINIUM	Seattle	D15	58.4 kBtu/ft²	146,102 sq ft
39	R.D. MERRILL BUILDING	Seattle	D15	84.3 kBtu/ft²	50,499 sq ft
40	INTERNATIONAL HOUSE	Seattle	D16	61.9 kBtu/ft²	75,477 sq ft
41	1000 DENNY WAY BUILDING	Seattle	D17	175.4 kBtu/ft²	287,819 sq ft
42	MARKET PLACE NORTH PHASE I CONDOMINIUM	Seattle	D17	52.0 kBtu/ft²	185,506 sq ft
43	NORTHWEST OUTPATIENT MEDICAL CENTER	Seattle	D17	168.7 kBtu/ft²	133,298 sq ft
44	THE CANAL VIEW BUILDING	Seattle	D17	103.5 kBtu/ft²	77,174 sq ft
45	INDUSTRIAL TRANSFER WHSE	Seattle	D18	50.0 kBtu/ft²	98,220 sq ft
46	Terreno 2nd Ave	Seattle	D18	54.1 kBtu/ft²	50,832 sq ft
47	M STREET APTS, RETAIL, & OFFICE	Seattle	D19	50.1 kBtu/ft²	332,781 sq ft
48	Charlie's Produce & Catering (Terminal)	Seattle	D19	139.4 kBtu/ft²	104,099 sq ft
49	NORTHGATE OFFICE BUILDING	Seattle	D19	84.1 kBtu/ft²	53,730 sq ft
50	LAKE WASHINGTON APARTMENTS	Seattle	D20	38.7 kBtu/ft²	332,900 sq ft
51	EAST UNION APARTMENTS	Seattle	D20	52.1 kBtu/ft²	184,974 sq ft
52	NORTHAVEN SENIOR LIVING	Seattle	D20	52.6 kBtu/ft²	124,904 sq ft
53	BALLARD HOUSE	Seattle	D20	58.6 kBtu/ft²	52,926 sq ft
54	Monica's Village Place 1	Seattle	D21	36.4 kBtu/ft²	157,724 sq ft
55	STONE AVENUE BUILDING	Seattle	D21	75.3 kBtu/ft²	92,080 sq ft
56	CONTINENTAL PLACE CONDOMINIUM	Seattle	D22	77.0 kBtu/ft²	190,610 sq ft
57	SEATTLE ACADEMY CAMPUS	Seattle	D22	67.6 kBtu/ft²	164,074 sq ft
58	citizenM South Lake Union Hotel	Seattle	D22	73.6 kBtu/ft²	89,199 sq ft
59	DOMAINE	Seattle	D22	50.5 kBtu/ft²	67,796 sq ft
60	FIFTEEN TWENTY-ONE SECOND AVENUE	Seattle	D23	63.4 kBtu/ft²	330,693 sq ft
61	EDGEWATER INN	Seattle	D23	173.4 kBtu/ft²	122,309 sq ft
62	KELLEHER HOUSE CONDOMINIUM	Seattle	D23	41.3 kBtu/ft²	76,855 sq ft
63	KIMBERLY APTS	Seattle	D23	80.5 kBtu/ft²	51,510 sq ft
64	THE SUMMIT	Seattle	D24	107.6 kBtu/ft²	207,022 sq ft
65	GREENTREE VILLAGE CONDOMINIUM	Seattle	D24	29.4 kBtu/ft²	79,963 sq ft
66	OFFICE BUILDING	Seattle	D24	81.4 kBtu/ft²	76,105 sq ft
67	HARWOOD CONDOMINIUM	Seattle	D25	32.3 kBtu/ft²	114,030 sq ft
68	BLOODWORKS NW CENTRAL SEATTLE	Seattle	D26	140.7 kBtu/ft²	121,099 sq ft
69	SIMONS SENIOR APTS	Seattle	D26	62.5 kBtu/ft²	96,980 sq ft
70	SEATTLE CITY LIGHT NORTH SERVICE CENTER (NSC)	Seattle	D26	93.1 kBtu/ft²	91,130 sq ft
71	UW NORTHWEST HOSPITAL & MEDICAL CENTER - CAMPUS	Seattle	D27	281.7 kBtu/ft²	668,027 sq ft
72	4245 ROOSEVELT - UW MEDICAL CENTER	Seattle	D27	123.1 kBtu/ft²	191,276 sq ft
73	CHAMBERY PARK CONDOMINIUM	Seattle	D27	25.2 kBtu/ft²	130,680 sq ft
74	THE COBB APARTMENTS	Seattle	D27	74.3 kBtu/ft²	123,897 sq ft
75	FEDEX VAN TERMINAL	Seattle	D27	32.5 kBtu/ft²	123,061 sq ft
76	KIRO-TV	Seattle	D27	111.4 kBtu/ft²	100,734 sq ft
77	SOUND VIEW WEST CONDOMINIUM	Seattle	D27	39.9 kBtu/ft²	82,082 sq ft
78	COMPASS HOUSING ALLIANCE	Seattle	D27	111.5 kBtu/ft²	57,600 sq ft
79	ST JOSEPH K-8 SCHOOL	Seattle	D28	43.9 kBtu/ft²	67,743 sq ft
80	FIRST FREE METHODIST CHURCH	Seattle	D29	35.9 kBtu/ft²	62,200 sq ft
81	SOUTH SEATTLE DISTRIBUTION CENTER- 3601	Seattle	D29	78.2 kBtu/ft²	52,613 sq ft
82	507 NORTHGATE	Seattle	D30	52.6 kBtu/ft²	295,410 sq ft
83	UNIVERSITY PRESBYTERIAN CHURCH	Seattle	D30	66.3 kBtu/ft²	87,250 sq ft
84	VIKTORIA APARTMENTS	Seattle	D31	61.2 kBtu/ft²	237,186 sq ft
85	FIRST HILL PLAZA CONDOMINIUM	Seattle	D31	55.1 kBtu/ft²	231,352 sq ft
86	BALLARD LANDMARK	Seattle	D31	48.6 kBtu/ft²	197,368 sq ft
87	UNIVERSITY BOOK STORE	Seattle	D31	56.1 kBtu/ft²	89,200 sq ft
88	HARBOR PARK CONDOMINIUM	Seattle	D31	48.9 kBtu/ft²	63,414 sq ft
89	THE CENTURY HOUSE	Seattle	D31	45.8 kBtu/ft²	58,485 sq ft
90	TRI-COURT	Seattle	D31	48.7 kBtu/ft²	57,247 sq ft
91	LAKE CITY CENTER	Seattle	D31	61.1 kBtu/ft²	50,759 sq ft
92	ASSEMBLY118 APTS	Seattle	D32	88.6 kBtu/ft²	381,161 sq ft
93	WORLD TRADE CENTER NORTH	Seattle	D32	103.8 kBtu/ft²	251,044 sq ft
94	SUNSET WEST PHASE II CONDOMINIUM	Seattle	D32	44.8 kBtu/ft²	239,054 sq ft
95	LAKESIDE WEST CONDOMINIUM	Seattle	D32	99.0 kBtu/ft²	80,539 sq ft
96	THE OLIVIAN	Seattle	D33	41.4 kBtu/ft²	501,239 sq ft
97	TATE MASON	Seattle	D33	51.5 kBtu/ft²	132,024 sq ft
98	ZEPHYR APTS	Seattle	D33	42.6 kBtu/ft²	85,647 sq ft
99	CONCEPT ONE APTS	Seattle	D33	74.7 kBtu/ft²	63,861 sq ft
100	W SEATTLE ELEM (HIGH POINT) (SPS-DISTRICT)	Seattle	D33	44.4 kBtu/ft²	54,528 sq ft

Frequently asked questions

Which large Seattle buildings have the worst energy grades?

4545 15TH AVE NE reports the lowest ENERGY STAR score (1) among Seattle buildings over 50,000 sq ft. 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.

Does a low score mean the building breaks the law?

No. A low ENERGY STAR score is a national efficiency percentile, not a violation. It does correlate with exposure under building-performance standards (carbon caps, retrofit mandates), which is why owners, lenders and retrofit contractors watch these lists.

Dataset updated July 2026 . Source: Building Energy Benchmarking public disclosure.