Least efficient large buildings in Cambridge

Bottom 100 ENERGY STAR scores among buildings over 50,000 sq ft under BEUDO — the penalty-exposure watchlist. Flip side: most efficient →

At a glance

100 Technology Square has the lowest ENERGY STAR score among Cambridge buildings over 50,000 sq ft: 1 out of 100 in its 2024 disclosure. The 100 buildings ranked here score between 1 and 72, against a citywide average of 66 across all sizes.

Bottom 100 by ENERGY STAR score

#	Building	City	Score	Site EUI	Floor area
1	100 Technology Square	Cambridge	D1	398.4 kBtu/ft²	255,441 sq ft
2	300 Technology Square	Cambridge	D1	329.6 kBtu/ft²	175,609 sq ft
3	10, 12, 20-22-24, 36, 50, 60, 62, 64 Moulton Street	Cambridge	D4	244.4 kBtu/ft²	193,217 sq ft
4	650 CONCORD AVE	Cambridge	D4	215.7 kBtu/ft²	81,000 sq ft
5	270 Third Street	Cambridge	D4	112.1 kBtu/ft²	71,561 sq ft
6	One Hampshire St	Cambridge	D5	246.2 kBtu/ft²	361,302 sq ft
7	1 Porter Square	Cambridge	D5	100.7 kBtu/ft²	56,078 sq ft
8	17-19A Forest Street	Cambridge	D6	121.9 kBtu/ft²	53,884 sq ft
9	600 Technology Square	Cambridge	D8	112.1 kBtu/ft²	127,224 sq ft
10	60 Oxford Street	Cambridge	D9	235.6 kBtu/ft²	97,036 sq ft
11	200 Cambridge Park Drive	Cambridge	D10	203.9 kBtu/ft²	221,676 sq ft
12	One Kendall Square	Cambridge	D10	232.3 kBtu/ft²	140,058 sq ft
13	20 Dewolfe St	Cambridge	D12	79.4 kBtu/ft²	65,035 sq ft
14	799 Concord Ave	Cambridge	D13	151.9 kBtu/ft²	162,853 sq ft
15	215 1st ST	Cambridge	D15	141.7 kBtu/ft²	366,723 sq ft
16	130 Mount Auburn Street	Cambridge	D17	64.0 kBtu/ft²	63,208 sq ft
17	23 Sidney Street	Cambridge	D17	46.4 kBtu/ft²	56,631 sq ft
18	91 Sidney Street	Cambridge	D19	65.4 kBtu/ft²	159,108 sq ft
19	One Leighton Street	Cambridge	D21	63.4 kBtu/ft²	612,952 sq ft
20	55 Essex Street	Cambridge	D21	96.8 kBtu/ft²	50,038 sq ft
21	50 Broadway	Cambridge	D22	145.8 kBtu/ft²	334,260 sq ft
22	975 Memorial Drive	Cambridge	D23	65.7 kBtu/ft²	147,273 sq ft
23	632 Massachusetts Avenue	Cambridge	D24	60.2 kBtu/ft²	197,283 sq ft
24	40 Granite Street	Cambridge	D25	91.1 kBtu/ft²	74,806 sq ft
25	119 Windsor St	Cambridge	D26	132.0 kBtu/ft²	64,703 sq ft
26	14 Roosevelt Towers	Cambridge	D27	100.7 kBtu/ft²	91,526 sq ft
27	80 Gerry's Landing Rd.	Cambridge	D28	75.0 kBtu/ft²	106,070 sq ft
28	50 Rogers St	Cambridge	D30	71.2 kBtu/ft²	105,566 sq ft
29	1030 Massachusetts Avenue	Cambridge	D32	160.2 kBtu/ft²	77,805 sq ft
30	1493 Cambridge Street	Cambridge	D33	308.2 kBtu/ft²	360,250 sq ft
31	25 Edwin H Land Blvd.	Cambridge	D34	128.2 kBtu/ft²	153,627 sq ft
32	158 Spring Street	Cambridge	D34	62.5 kBtu/ft²	127,302 sq ft
33	20 Sidney St	Cambridge	D35	91.7 kBtu/ft²	202,615 sq ft
34	575 Memorial Drive	Cambridge	D37	121.4 kBtu/ft²	347,000 sq ft
35	114 Mt Auburn Street	Cambridge	D37	84.2 kBtu/ft²	65,107 sq ft
36	650 E Kendall Street	Cambridge	D38	133.5 kBtu/ft²	328,136 sq ft
37	178 Coolidge Hill	Cambridge	D38	81.5 kBtu/ft²	110,000 sq ft
38	1105 Mass. Ave	Cambridge	D39	64.2 kBtu/ft²	122,297 sq ft
39	2 Mount Auburn Street	Cambridge	D40	77.4 kBtu/ft²	71,582 sq ft
40	110 Cushing Street	Cambridge	D40	67.4 kBtu/ft²	53,664 sq ft
41	625 Mount Auburn St	Cambridge	D41	85.2 kBtu/ft²	137,421 sq ft
42	84-86 Brattle Street	Cambridge	D41	99.2 kBtu/ft²	73,332 sq ft
43	1648-1654 Massachusetts Avenue	Cambridge	D41	108.4 kBtu/ft²	63,287 sq ft
44	89 Elm Street	Cambridge	D41	80.0 kBtu/ft²	58,323 sq ft
45	100 Landsdowne Street	Cambridge	D43	46.6 kBtu/ft²	239,086 sq ft
46	210 Broadway	Cambridge	D43	68.4 kBtu/ft²	64,812 sq ft
47	15 Lambert Street	Cambridge	D44	83.0 kBtu/ft²	215,544 sq ft
48	88 Ames Street	Cambridge	D45	72.4 kBtu/ft²	181,217 sq ft
49	14 Roosevelt Towers	Cambridge	D45	91.5 kBtu/ft²	134,884 sq ft
50	1050 Massachusetts Avenue	Cambridge	D45	66.6 kBtu/ft²	73,498 sq ft
51	450 Water Street	Cambridge	D46	97.7 kBtu/ft²	350,500 sq ft
52	364 Rindge Ave	Cambridge	D46	93.2 kBtu/ft²	249,723 sq ft
53	197 Vassal Lane	Cambridge	D46	32.9 kBtu/ft²	124,543 sq ft
54	900 Memorial Drive	Cambridge	D47	77.5 kBtu/ft²	450,849 sq ft
55	425 Massachusetts Avenue	Cambridge	D48	68.8 kBtu/ft²	151,054 sq ft
56	141 Portland Street	Cambridge	D50	70.3 kBtu/ft²	135,928 sq ft
57	1 Corcoran Lane	Cambridge	D52	86.0 kBtu/ft²	200,633 sq ft
58	41-43 Linnaean Street	Cambridge	D52	62.2 kBtu/ft²	94,360 sq ft
59	243 Broadway	Cambridge	D52	62.3 kBtu/ft²	57,927 sq ft
60	11 Cambridge Ctr	Cambridge	D53	132.7 kBtu/ft²	79,616 sq ft
61	675 Mass Ave	Cambridge	D54	90.7 kBtu/ft²	127,880 sq ft
62	63 Mt Auburn St	Cambridge	D54	91.4 kBtu/ft²	58,818 sq ft
63	5 cadbury road	Cambridge	D54	76.1 kBtu/ft²	55,000 sq ft
64	185 ALEWIFE BROOK PARKWAY	Cambridge	C55	104.0 kBtu/ft²	64,000 sq ft
65	195 Binney St.	Cambridge	C56	68.6 kBtu/ft²	213,000 sq ft
66	362 Rindge Ave	Cambridge	C57	79.0 kBtu/ft²	249,723 sq ft
67	1008 Massachusetts Avenue	Cambridge	C57	67.5 kBtu/ft²	50,000 sq ft
68	70 Rindge Avenue	Cambridge	C58	72.8 kBtu/ft²	108,989 sq ft
69	75 Cambridge Parkway	Cambridge	C61	69.1 kBtu/ft²	400,000 sq ft
70	55 Cambridge Parkway	Cambridge	C61	68.2 kBtu/ft²	283,686 sq ft
71	29 Garden Street	Cambridge	C61	56.3 kBtu/ft²	112,985 sq ft
72	784 Memorial Drive	Cambridge	C61	80.0 kBtu/ft²	61,000 sq ft
73	50 Churchill	Cambridge	C62	90.2 kBtu/ft²	141,759 sq ft
74	1 Woodrow WIlson Ct	Cambridge	C62	71.3 kBtu/ft²	72,970 sq ft
75	85 Oxford Street	Cambridge	C62	54.9 kBtu/ft²	69,340 sq ft
76	151 North First Street	Cambridge	C63	52.5 kBtu/ft²	434,093 sq ft
77	255 Main Street	Cambridge	C63	63.3 kBtu/ft²	281,000 sq ft
78	One Brattle Square	Cambridge	C64	64.5 kBtu/ft²	108,592 sq ft
79	931 Massachusetts Ave	Cambridge	C64	46.0 kBtu/ft²	59,260 sq ft
80	201 BROADWAY	Cambridge	C65	56.3 kBtu/ft²	119,248 sq ft
81	725 Concord Avenue	Cambridge	C65	65.2 kBtu/ft²	85,226 sq ft
82	6 Fresh Pond Place	Cambridge	C65	83.2 kBtu/ft²	57,875 sq ft
83	100 Memorial Dr	Cambridge	C66	84.3 kBtu/ft²	280,000 sq ft
84	150 Broadway	Cambridge	C66	79.5 kBtu/ft²	187,875 sq ft
85	6 Cambridge Center	Cambridge	C66	90.6 kBtu/ft²	181,700 sq ft
86	10 Canal Park	Cambridge	C66	46.2 kBtu/ft²	135,710 sq ft
87	1 Bennet Street	Cambridge	C67	70.6 kBtu/ft²	498,000 sq ft
88	303 Third St	Cambridge	C67	58.9 kBtu/ft²	324,872 sq ft
89	1 Earhart Street	Cambridge	C67	55.0 kBtu/ft²	136,655 sq ft
90	131 Washington Street	Cambridge	C68	75.1 kBtu/ft²	275,666 sq ft
91	1035 Cambridge Street	Cambridge	C68	67.3 kBtu/ft²	102,807 sq ft
92	1010 Memorial Drive	Cambridge	C69	60.4 kBtu/ft²	133,981 sq ft
93	58 Charles Street	Cambridge	C69	67.2 kBtu/ft²	61,114 sq ft
94	124 Mount Auburn Street	Cambridge	B70	52.0 kBtu/ft²	196,007 sq ft
95	250 Kendall Street	Cambridge	B70	51.0 kBtu/ft²	155,196 sq ft
96	10 Fawcett St	Cambridge	B70	59.2 kBtu/ft²	107,681 sq ft
97	15 Upton Street	Cambridge	B70	55.2 kBtu/ft²	58,529 sq ft
98	459 Broadway	Cambridge	B71	63.1 kBtu/ft²	403,393 sq ft
99	500 Kendall Street	Cambridge	B72	68.1 kBtu/ft²	349,325 sq ft
100	90 Broadway	Cambridge	B72	62.8 kBtu/ft²	280,488 sq ft

What do Cambridge's least efficient buildings have in common?

12 of them score 10 or lower. By property type the list is led by multifamily housing (41), office (28) and K-12 school (12). Their average site EUI is 97.1 kBtu/ft², about 17% below the citywide average of 117.2 kBtu/ft². Combined they cover 16.7 million square feet; the median ranked building has 133,981 sq ft.

The ranking covers buildings of 50,000 sq ft or more that report an ENERGY STAR score, ordered by score and then by floor area. Cambridge's 2023 BEUDO amendments require non-residential buildings of 100,000+ sq ft to reach net-zero emissions by 2035 (reductions starting 2026) and those of 25,000–100,000 sq ft by 2050 (starting 2030).

More Cambridge rankings and data

Frequently asked questions

Which large Cambridge buildings have the worst energy grades?

100 Technology Square reports the lowest ENERGY STAR score (1) among Cambridge buildings over 50,000 sq ft. Cambridge's 2023 BEUDO amendments require non-residential buildings of 100,000+ sq ft to reach net-zero emissions by 2035 (reductions starting 2026) and those of 25,000–100,000 sq ft by 2050 (starting 2030).

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.

About this data

Source: Building Energy Use Disclosure Ordinance (BEUDO) (BEUDO), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.

Cite as: BuildingCensus, “Least efficient buildings in Cambridge”, https://buildingcensus.com/rankings/least-efficient/cambridge (data as of October 2, 2026).