Floorplans & Capacities




Event rental at Dumbarton House includes a gracious entry through the front door and first floor of the Museum (usually during the social and/or arrival time-period). All events with seated dining must take place in the Belle Vue Room (table seating on the lawn, or the addition of flooring, is prohibited). Along with the entry through the historic portion of the Museum, guests may use:

  • The exterior North Garden (a lovely, flat yard behind the Museum), which may be tented;
  • The exterior Upper Terrace (east of the Museum, and above the banquet space ), which may be tented;
  • The interior Belle Vue Room (the banquet space two levels below the historic Museum, that is a hardwood floor, perfect for dancing) has a capacity of:
    • 140 Standing Reception (e.g., cocktail event, and/or food stations with limited, unassigned seating)
    • 100 Seated, lecture-style
    • 70 Seated with a band and dancing space
    • 80 Seated without a band and dancing space
  • With the additional use of the Lower Courtyard, for which tenting is required with over 80 guests*, the capacity increases to:
    • 200 Standing Reception
    • 170 Standing Reception with a band and dance floor
    • 150 Seated with a band and dancing space
    • 160 Seated without a band and dancing space

Strict adherence to the maximum capacities of the Dumbarton House facilities is enforced in compliance with fire regulations. The renter is responsible for keeping the number of guests attending the event within the maximum occupancy limits:

  • 200 persons on the entire property;
  • 75 persons inside the historic portion of the Museum at one time.

*At the renter’s expense, a tent or tents may be erected to increase occupancy limits. If a seated dining event exceeds 80 persons, or 140 guests for a standing reception, the renter is required to secure a tent for the Lower Courtyard, for the Contracting Party’s protection in the case of inclement weather using our Preferred Vendor for tenting, Sugarplum Tent Company.