Marriott Marquis Houston Ballroom Capacities, Meeting Rooms & Floorplate Specs (94,124 Sq. Ft.)

Verified specs for 23 meeting rooms and the 39,716 sq. ft. main ballroom in Houston, TX.

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Marriott Marquis Houston — Ballroom, Foyer & Breakout Capacity Matrix

94,124 sq. ft. total event space across 23 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	39,716 sq. ft.	22'–26' Clear	4,181	2,942	2,482	199 booths	$0 Rental w/ $28,000 F&B Min
Junior Ballroom & Divisional Plated Dining Hall Luncheons, Partner Summits & VIP Receptions	19,064 sq. ft.	18'–22' Clear	2,007	1,412	1,192	95 booths	$0 Rental w/ $14,000 F&B Min
Pre-Function Registration & Sponsor Showcase Concourse Badge Pickup, Tabletop Sponsors & Networking Breaks	16,942 sq. ft.	16'–24' Atrium	1,412	1,129	847	85 booths	Included w/ Grand Ballroom License
Executive Breakout & Boardroom Wing (23 Rooms Total) 1-on-1 Enterprise Deal Rooms, Track Breakouts & Speaker Ready	4,766 sq. ft.	12'–16' Clear	477	340	280	24 booths	$0 w/ 50+ Peak Night Room Block

Marriott Marquis Houston — 8-Row Master Property & Group Contract Summary

Guest Room Inventory & Peak Group Allocation

1,000 Total Keys · Up to 420 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

94,124 Sq. Ft. Total · 23 Dedicated Meeting & Breakout Rooms

Optimal for 600–4,181 attendee conferences requiring simultaneous keynote and breakout tracks.

Largest Pillarless Ballroom Capacity

39,716 Sq. Ft. · 4,181 Theater · 2,942 Plated Banquet

Divisible soundproof airwalls; supports up to 199 standard 10×10 tabletop/exhibit booths (~200 gross sq. ft./booth) with 24-hour hold option.

Primary Convention Campus Connectivity

George R. Brown Convention Center (3–6 min covered walk to Exhibit Halls)

Primary headquarter and exhibitor room-block anchor serving George R. Brown Convention Center.

Airport Transfer & Motorcoach Staging

IAH (George Bush Intercontinental Airport) · 19.5 mi (23 mins off-peak / 38–50 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

$229/nt Group Block vs. $379/nt Peak Rack · 17.0% Houston / Harris County Hotel Occupancy Tax

Mandatory $22/nt resort/destination fee is 100% waived when contracted through the Conventions.com Housing Desk (saves $201/room/night all-in).

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

$28,000 Ballroom Waiver Min · 24% Service + 8.25% Tax (+34.2% 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.