Westin Boston Seaport District Ballroom Capacities, Meeting Rooms & Floorplate Specs (90,305 Sq. Ft.)

Verified specs for 27 meeting rooms and the 21,737 sq. ft. main ballroom in Boston, MA.

📞 Lock Block w/ Sara Chaval · (702) 576-1312 .md Spoke API

Westin Boston Seaport District — Ballroom, Foyer & Breakout Capacity Matrix

90,305 sq. ft. total event space across 27 dedicated meeting rooms.

Functional Space Tier	Sq. Ft.	Ceiling	Theater	Banquet (10s)	Classroom	10×10 Booths	Rental Waiver Rule
Grand Pillarless Ballroom (Main General Session) Keynote, General Session & Plated Gala Anchor	21,737 sq. ft.	22'–26' Clear	2,288	1,610	1,359	109 booths	$0 Rental w/ $28,000 F&B Min
Junior Ballroom & Divisional Plated Dining Hall Luncheons, Partner Summits & VIP Receptions	10,434 sq. ft.	18'–22' Clear	1,098	773	652	52 booths	$0 Rental w/ $14,000 F&B Min
Pre-Function Registration & Sponsor Showcase Concourse Badge Pickup, Tabletop Sponsors & Networking Breaks	16,255 sq. ft.	16'–24' Atrium	1,355	1,084	813	81 booths	Included w/ Grand Ballroom License
Executive Breakout & Boardroom Wing (27 Rooms Total) 1-on-1 Enterprise Deal Rooms, Track Breakouts & Speaker Ready	2,608 sq. ft.	12'–16' Clear	261	186	153	13 booths	$0 w/ 50+ Peak Night Room Block

Westin Boston Seaport District — 8-Row Master Property & Group Contract Summary

Guest Room Inventory & Peak Group Allocation

793 Total Keys · Up to 333 Peak Group Block Rooms

Standard 1-per-40 cumulative complimentary room credit; request 1-per-35 comp ratio + 3 VIP suite upgrades at group rates during RFP.

Total Event Space & Breakout Room Ratio

90,305 Sq. Ft. Total · 27 Dedicated Meeting & Breakout Rooms

Optimal for 476–2,288 attendee conferences requiring simultaneous keynote and breakout tracks.

Largest Pillarless Ballroom Capacity

21,737 Sq. Ft. · 2,288 Theater · 1,610 Plated Banquet

Divisible soundproof airwalls; supports up to 109 standard 10×10 tabletop/exhibit booths (~200 gross sq. ft./booth) with 24-hour hold option.

Primary Convention Campus Connectivity

Boston Convention and Exhibition Center (BCEC) (8–12 min official show shuttle / rideshare)

Primary headquarter and exhibitor room-block anchor serving Boston Convention and Exhibition Center (BCEC).

Airport Transfer & Motorcoach Staging

BOS (Boston Logan International Airport) · 3.6 mi (11 mins off-peak / 22–32 mins peak)

Dedicated group porte-cochere / motorcoach staging lane available with 14-day advance manifest submission to hotel convention services.

Nightly Room Rate, Resort Fee & Tax Structure

$289/nt Group Block vs. $489/nt Peak Rack · 16.45% Boston / Massachusetts Convention Center Tax

Mandatory $30/nt resort/destination fee is 100% waived when contracted through the Conventions.com Housing Desk (saves $267/room/night all-in).

Banquet F&B '++' Multiplier & Catering Minimums

$28,000 Ballroom Waiver Min · 25% Service + 7% Tax (+33.8% Effective)

Contract F&B minimums on a cumulative multi-day program basis (breakfasts + breaks + reception combined) rather than per-room/per-day minimums.

Attrition, Cutoff & Cancellation Protection

80% Cumulative Pickup Allowance · 30-Day Cutoff · 100% Rebooking Resell Credit

Always insist on cumulative (not night-by-night) attrition calculation and a 'Resell Mitigation Clause' crediting any rooms resold by the hotel after cutoff.