Hyatt Regency Greenwich in Old Greenwich, CT has 24 event spaces in this registry, totaling 40,818 sq ft. The largest, Regency Ballroom, measures 120' × 80' (9,600 sq ft) under a 16' ceiling. Published capacities run up to 1,200 guests. Regency Ballroom and Mead and Winthrop and New London divide by airwall — every section and combination below comes from one to-scale drawing of the room. Floor plans are drawn to the room's actual perimeter, and any of them can be opened as a live event diagram, free.
Floor plans
Event spaces
| Space | Dimensions | Floor area | Ceiling | Airwall sections |
|---|---|---|---|---|
| Regency BallroomFrom the venue's published materials | 120' × 80' | 9,600 sq ft | 16' | DEF · G · ABC |
| Regency Ballroom FoyerFrom the venue's published materials | 176' × 25' | 4,400 sq ft | 10' | — |
| Regency PatioFrom the venue's published materials | 93' × 21' | 1,953 sq ft | — | — |
| Garden CourtFrom the venue's published materials | 70' × 40' | 2,800 sq ft | 40' | — |
| Sun Court PavilionFrom the venue's published materials | 65' × 65' | 4,225 sq ft | — | — |
| Riverside BallroomFrom the venue's published materials | 60' × 39' | 2,340 sq ft | 10' | — |
| Riverside Ballroom FoyerFrom the venue's published materials | 65' × 12' | 780 sq ft | 10' | — |
| Roundhill AmphitheaterFrom the venue's published materials | 59' × 41' | 2,419 sq ft | 10' | — |
| MeadFrom the venue's published materials | 79' × 25' | 1,975 sq ft | 10' | A · B · C |
| WinthropFrom the venue's published materials | 50' × 26' | 1,300 sq ft | 10' | A · B |
| Conde'sFrom the venue's published materials | 46' × 23' | 1,058 sq ft | 10' | — |
| New LondonFrom the venue's published materials | 26' × 26' | 676 sq ft | 10' | A · B |
| Byram ShoreFrom the venue's published materials | 28' × 26' | 728 sq ft | 11' | — |
| Belle HavenFrom the venue's published materials | 28' × 26' | 728 sq ft | 11' | — |
| MilbrookFrom the venue's published materials | 27' × 27' | 729 sq ft | 11' | — |
| Cos CobFrom the venue's published materials | 26' × 24' | 624 sq ft | 11' | — |
| SheffieldFrom the venue's published materials | 29' × 25' | 725 sq ft | 10' | — |
| PutnamFrom the venue's published materials | 25' × 23' | 575 sq ft | 10' | — |
| Laddins RockFrom the venue's published materials | 24' × 21' | 504 sq ft | 10' | — |
| FerrisFrom the venue's published materials | 25' × 18' | 450 sq ft | 10' | — |
| StoningtonFrom the venue's published materials | 26' × 26' | 676 sq ft | 10' | — |
| Stonington PatioFrom the venue's published materials | 31' × 17' | 527 sq ft | — | — |
| Stanwich Board RoomFrom the venue's published materials | 33' × 12' | 396 sq ft | 11' | — |
| The LibraryFrom the venue's published materials | 35' × 18' | 630 sq ft | 9' | — |
Capacity charts
Regency Ballroom
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full ballroom | 120' × 80' | 9,600 | 840 | 1,200 | 1,000 | 500 | — | — | — |
| Salons A–F (each) | 40' × 27' | 1,080 | 60 | 100 | 90 | 50 | 28 | 36 | 42 |
| Salon G | 40' × 80' | 3,200 | 210 | 300 | 360 | 150 | 28 | 36 | 42 |
| Salons AB / DE | 54' × 40' | 2,160 | 130 | 200 | 180 | 100 | 50 | 60 | — |
| Salons ABC / DEF | 40' × 80' | 3,200 | 210 | 300 | 360 | 150 | — | — | — |
| Salons ABCG / DEFG | 80' × 80' | 6,400 | 490 | 600 | 720 | 300 | — | — | — |
Regency Ballroom Foyer
| Room / section | Dimensions | Sq ft | Banquet | Reception |
|---|---|---|---|---|
| Full foyer | 176' × 25' | 4,400 | 300 | 500 |
Regency Patio
| Room / section | Dimensions | Sq ft | Banquet | Reception |
|---|---|---|---|---|
| Full patio | 93' × 21' | 1,953 | 120 | 175 |
Garden Court
| Room / section | Dimensions | Sq ft | Banquet | Reception |
|---|---|---|---|---|
| Full room | 70' × 40' | 2,816 | 110 | 241 |
Sun Court Pavilion
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom |
|---|---|---|---|---|---|---|
| Full room | 65' × 65' | 4,225 | 350 | 475 | 315 | 200 |
Riverside Ballroom
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 60' × 39' | 2,682 | 200 | 275 | 250 | 110 | 42 | 48 | 66 |
Riverside Ballroom Foyer
| Room / section | Dimensions | Sq ft |
|---|---|---|
| Full room | 65' × 12' | 780 |
Roundhill Amphitheater
| Room / section | Dimensions | Sq ft | Classroom |
|---|---|---|---|
| Full room | 59' × 41' | 2,419 | 110 |
Mead
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room (ABC) | 79' × 25' | 1,975 | 140 | 180 | 170 | 81 | — | 40 | — |
| Mead A | 27' × 25' | 675 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
| Mead B | 26' × 25' | 650 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
| Mead C | 26' × 25' | 650 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
| Mead AB / BC | 53' × 25' | 1,300 | — | — | — | — | — | — | — |
Winthrop
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room (AB) | 50' × 26' | 1,300 | 90 | 120 | 100 | 54 | 40 | 36 | 50 |
| Winthrop A | 26' × 25' | 650 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
| Winthrop B | 26' × 25' | 650 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
Conde's
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 46' × 23' | 1,058 | 120 | 170 | 100 | 60 | 40 | 40 | 46 |
New London
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room (AB) | 26' × 26' | 676 | 40 | 60 | 50 | 27 | 20 | 18 | 32 |
| New London A | 13' × 26' | 338 | 24 | 30 | 20 | 13 | 10 | 10 | 13 |
| New London B | 13' × 26' | 338 | 24 | 30 | 20 | 13 | 10 | 10 | 13 |
Byram Shore
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 28' × 26' | 728 | 50 | 75 | 60 | 30 | 24 | 24 | 24 |
Belle Haven
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 28' × 26' | 728 | 50 | 75 | 60 | 30 | 24 | 24 | 24 |
Milbrook
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 27' × 27' | 729 | 50 | 75 | 60 | 30 | 24 | 24 | 24 |
Cos Cob
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 26' × 24' | 624 | 50 | 60 | 60 | 30 | 24 | 24 | 24 |
Sheffield
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 29' × 25' | 725 | 50 | 85 | 60 | 25 | 20 | 15 | 18 |
Putnam
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 25' × 23' | 575 | 40 | 60 | 50 | 36 | 18 | 18 | 24 |
Laddins Rock
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 24' × 21' | 500 | 32 | 55 | 40 | 18 | 16 | 15 | 20 |
Ferris
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 25' × 18' | 450 | 24 | 40 | 35 | 16 | 14 | 12 | 16 |
Stonington
| Room / section | Dimensions | Sq ft | Banquet | Reception | Theater | Classroom | Boardroom | U-Shape | Hollow Square |
|---|---|---|---|---|---|---|---|---|---|
| Full room | 26' × 26' | 676 | 20 | 40 | 30 | 13 | 20 | 15 | 18 |
Stonington Patio
| Room / section | Dimensions | Sq ft | Banquet | Reception |
|---|---|---|---|---|
| Full room | 31' × 17' | 527 | 25 | 35 |
Stanwich Board Room
| Room / section | Dimensions | Sq ft | Boardroom |
|---|---|---|---|
| Full room | 33' × 12' | 396 | 12 |
The Library
| Room / section | Dimensions | Sq ft | Reception | Boardroom |
|---|---|---|---|---|
| Full room | 35' × 18' | 630 | 17 | 8 |
Capacities as published by the venue — actual counts depend on staging, dance floors, AV and local code. Diagram the room to see what really fits.
Airwall combinations
Each divisible room is drawn once; every section combination derives from the same to-scale geometry.
Regency Ballroom
| Section / combination | Dimensions | Floor area |
|---|---|---|
| DEF | 40' × 80' | 3,200 sq ft |
| G | 40' × 80' | 3,200 sq ft |
| ABC | 40' × 80' | 3,200 sq ft |
| DEF + G | 80' × 80' | 6,400 sq ft |
| G + ABC | 80' × 80' | 6,400 sq ft |
Mead
| Section / combination | Dimensions | Floor area |
|---|---|---|
| A | 27' × 25' | 675 sq ft |
| B | 26' × 25' | 650 sq ft |
| C | 26' × 25' | 650 sq ft |
| A + B | 53' × 25' | 1,325 sq ft |
| B + C | 52' × 25' | 1,300 sq ft |
Winthrop
| Section / combination | Dimensions | Floor area |
|---|---|---|
| A | 25' × 26' | 650 sq ft |
| B | 25' × 26' | 650 sq ft |
New London
| Section / combination | Dimensions | Floor area |
|---|---|---|
| A | 13' × 26' | 338 sq ft |
| B | 13' × 26' | 338 sq ft |
Frequently asked questions
How many event spaces does Hyatt Regency Greenwich have?
Hyatt Regency Greenwich has 24 event spaces in this registry — Regency Ballroom, Regency Ballroom Foyer, Regency Patio, Garden Court, Sun Court Pavilion, Riverside Ballroom, Riverside Ballroom Foyer, Roundhill Amphitheater, Mead, Winthrop, Conde's, New London, Byram Shore, Belle Haven, Milbrook, Cos Cob, Sheffield, Putnam, Laddins Rock, Ferris, Stonington, Stonington Patio, Stanwich Board Room, The Library — totaling 40,818 sq ft.
What is the largest event space at Hyatt Regency Greenwich?
Regency Ballroom, at 9,600 sq ft (120' × 80', 16' ceiling).
How many guests can Hyatt Regency Greenwich accommodate?
Up to 1,200 guests in its largest configuration, per the venue's published capacity chart. Capacity varies by room and setup style — actual counts depend on staging, dance floors, AV, and local code.
Can Regency Ballroom at Hyatt Regency Greenwich be divided?
Yes — Regency Ballroom divides by airwall into 3 sections (DEF, G, ABC), plus 2 contiguous combinations. Dimensions for each are in the airwall combinations table.
Can Mead at Hyatt Regency Greenwich be divided?
Yes — Mead divides by airwall into 3 sections (A, B, C), plus 2 contiguous combinations. Dimensions for each are in the airwall combinations table.
Can Winthrop at Hyatt Regency Greenwich be divided?
Yes — Winthrop divides by airwall into 2 sections (A, B). Dimensions for each are in the airwall combinations table.
Can New London at Hyatt Regency Greenwich be divided?
Yes — New London divides by airwall into 2 sections (A, B). Dimensions for each are in the airwall combinations table.
What are the ceiling heights at Hyatt Regency Greenwich?
Regency Ballroom: 16'; Regency Ballroom Foyer: 10'; Garden Court: 40'; Riverside Ballroom: 10'; Riverside Ballroom Foyer: 10'; Roundhill Amphitheater: 10'; Mead: 10'; Winthrop: 10'; Conde's: 10'; New London: 10'; Byram Shore: 11'; Belle Haven: 11'; Milbrook: 11'; Cos Cob: 11'; Sheffield: 10'; Putnam: 10'; Laddins Rock: 10'; Ferris: 10'; Stonington: 10'; Stanwich Board Room: 11'; The Library: 9'.
Planning an event at Hyatt Regency Greenwich?
- How many tables fit in my ballroom?Set the table, the chairs per table and the spacing you actually use, and the capacity calculator returns the real number for your space before you place anything.
- What is an airwall, and why does it change how floor plans work?Airwalls are the movable partitions that split a ballroom into sections. EventDiagram draws the space once and derives every combination, instead of storing a separate floor plan per combination.
- How do I make a floor plan that's actually to scale?Everything is in feet from the start — the event space's real dimensions, every object's real size, and a scale bar on screen — so the plan is measurable rather than illustrative.
- How do I share a floor plan with a client?A share link opens the real diagram in any browser, to scale and in 3D, with no account needed — and you choose whether the recipient can view, comment, or take a copy.
About this data
This page is part of the EventDiagram venue registry — floor-plan data published for event planners, vendors, and the venue itself. This record was compiled from the venue's public materials and has not yet been claimed by the venue. Room dimensions here come from the venue's own published materials. We have not yet traced these rooms to their real perimeter or recorded independent scale checks, so shapes are shown as simple rectangles at the published dimensions. Software assists the tracing; a person reviews every plan against its source before it appears here. Capacity figures are only ever the venue's own published numbers — we never estimate them. Full details in how we measure venues.
Sources
- Venue-published capacity chart and floor plan screenshots (2026-08)
- https://www.cvent.com/venues/greenwich/hotel/-newly-renovated-hyatt-regency-greenwich/venue-b9222777-33b5-4752-ae5d-ff3306afcbad
- https://www.hyatt.com/hyatt-regency/en-US/gwich-hyatt-regency-greenwich
- https://custom.cvent.com/f1ddaf956f46445e99e0baaa734100b2/files/rfp/b922277733b54752ae5dff3306afcbad/115ad4c7bed149bab25368e3c24c598d.pdf
- https://custom.cvent.com/f1ddaf956f46445e99e0baaa734100b2/files/rfp/b922277733b54752ae5dff3306afcbad/b1b3db65500747798a8fa3f88311a2dd.pdf
Known limitations
- Regency Ballroom: Salons A–F divide the ballroom on a two-way grid; the airwall sections listed here are the three full-height divisions (DEF · G · ABC).
- Regency Ballroom: Published salon depth (27' × 3) totals 81' against the 80' room depth; row dividers are recorded at even thirds.
- Regency Ballroom: Door positions are approximate (±3 ft), read from the venue's plan screenshots rather than vector-traced.
- Regency Ballroom: No columns are shown in the source; a clear span is assumed.
- Regency Ballroom Foyer: Modeled as a plain rectangle; the actual foyer is L-shaped.
- Regency Patio: Outdoor space — capacities assume open-sky setup with no tenting.
- Garden Court: The venue's capacity PDF lists reception 241; its Cvent listing shows 220 (and banquet 110, which the PDF omits). The PDF reception figure is used; banquet is Cvent-only.
- Sun Court Pavilion: Seasonal tented pavilion (heated and air-conditioned, per the venue).
- Sun Court Pavilion: The venue's capacity PDF lists banquet 350 and classroom 200; its Cvent listing shows 280 and 150. The PDF figures are used.
- Riverside Ballroom: Published 2,682 sq ft exceeds the 60' × 39' envelope — the room is not a plain rectangle; outline not yet traced.
- Riverside Ballroom: The venue's capacity PDF lists classroom 110; its Cvent listing shows 100. The PDF figure is used.
- Mead: The venue's capacity PDF lists all three sections at 675 sq ft (25' × 27'), which would exceed the 79' room; the Cvent listing's 675/650/650 split sums exactly and is used.
- Winthrop: The venue's capacity PDF lists the combined room at 50' × 26' (consistent with A + B); its Cvent listing shows 52' × 25'. The PDF figure is used.
- Conde's: The venue's capacity PDF lists theater 100; its Cvent listing shows 80. The PDF figure is used.
- New London: The venue's capacity PDF lists the combined room as 13' × 52'; the venue's floor plan drawing and Cvent listing show A stacked over B (26' × 26'), which is used. Combined-room capacities are from the PDF.
- Putnam: The venue's capacity PDF lists theater 50; its Cvent listing shows 60. The PDF figure is used.
- Stonington: Marked outdoor in the venue's chart, with a 10' ceiling listed (covered space).
- Stonington Patio: Outdoor space.
Last updated September 1, 2026. Spot an error? Claim this venue to manage it, or tell us.
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