Courtyard by Marriott Boston Downtown — Event Spaces, Floor Plans & Capacities

275 Tremont St, Boston, MA 02116

9 rooms · largest space: Bradford Ballroom, 4,320 sq ft401 m²

Courtyard by Marriott Boston Downtown gives Boston event planners 9 rooms to work with. The largest space is Bradford Ballroom, 4,320 sq ft401 m². It holds up to 500 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Across its 9 rooms, Courtyard by Marriott Boston Downtown handles theater-style sessions for up to 500, seated banquets for 320 and standing receptions for 450. One smaller room suits breakouts and board meetings. Exact figures for every room and setup style are in the chart below.

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Floor plans

Detailed floor plans for Courtyard by Marriott Boston Downtown are published on the venue’s official site.

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Room capacities & dimensions

9 rooms

Room capacities and dimensions for Courtyard by Marriott Boston Downtown
Space	Sq ft / m²	Ceiling	Banquet	Theater	Classroom	Reception	Conference	U-Shape
Bradford BallroomPlan this room →	4,320 sq ft401 m²	17 ft5.2 m	320	500	240	450	78	84
Executive BoardroomPlan this room →	345 sq ft32 m²	10 ft3 m	—	—	—	—	12	—
Library RoomPlan this room →	1,620 sq ft151 m²	13 ft4 m	100	140	84	130	42	48
Shubert-Charles (Theatre Ballroom)Plan this room →	1,155 sq ft107 m²	10 ft3 m	80	125	60	115	30	36
Theater BallroomPlan this room →	3,201 sq ft297 m²	10 ft3 m	210	250	170	300	78	78
Washington BallroomPlan this room →	3,570 sq ft332 m²	12 ft3.7 m	250	350	219	350	70	68
Wilbur-Colonial Room (Theatre Ballroom)Plan this room →	1,674 sq ft156 m²	10 ft3 m	140	215	112	175	52	57

Additional spaces (dimensions only) (2)

Additional spaces with published dimensions only at Courtyard by Marriott Boston Downtown
Space	Sq ft / m²	Ceiling
Elks RoomPlan this room →	690 sq ft64 m²	8 ft2.4 m
Post No. 10 Private Dining RoomPlan this room →	413 sq ft38 m²	—

Figures from published venue data; blank cells mean the venue hasn’t published that number. Verify final counts with the venue.

Frequently asked questions

How many event rooms does Courtyard by Marriott Boston Downtown have?

Courtyard by Marriott Boston Downtown has 9 rooms.

What is the largest space at Courtyard by Marriott Boston Downtown?

Bradford Ballroom, 4,320 sq ft: 48 × 90 ft, 320 banquet / 500 theater.

How many people can Courtyard by Marriott Boston Downtown seat for a banquet?

Up to 320 in Bradford Ballroom. The next largest room, Washington Ballroom, seats 250.

What is the ceiling height at Courtyard by Marriott Boston Downtown?

The highest ceiling is 17 ft, in Bradford Ballroom.

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