3100 Macomb Street NW
Washington DC 20008-3324

Washington International School invites you to rent our Middle/Upper School campus for your event. Please note that rental contracts can be signed no more than three months prior to the event date. 

Location and Directions


Tregaron is a gated, hilltop estate in Cleveland Park (north of the National Zoo). The mansion and grounds are listed on the National Register of Historic Places.

Directions to Tregaron Estate

Downtown Washington, DC

Go north on Connecticut Avenue past the National Zoo and across the bridge over Rock Creek Park. Turn left on Macomb Street (Cleveland Park Library on corner) into residential neighborhood. After the first block, there is a stop sign followed by the WIS gate on left.


Go north on Wisconsin Avenue past the Washington National Cathedral. Turn right on Macomb Street into Cleveland Park residential neighborhood. Pass through 34th Street traffic light (Eaton Elementary School on that corner).Continue downhill to the WIS gate on right.


Take Exit #33 from I-495 (Capital Beltway). Proceed south on Connecticut Avenue through Chevy Chase Circle into Washington, DC. After the Cleveland Park metro station, you will pass the Uptown Theatre.Shortly thereafter, turn right on Macomb Street (Cleveland Park Branch Library on corner). After the first block, there is a stop sign followed by the WIS gate on left.

Virginia from Key Bridge

Turn right on M Street into Georgetown and stay in the left lane. Turn left on 33rd Street, and take another left on Wisconsin Avenue. Proceed north past Washington National Cathedral. Turn right on Macomb Street. Pass through 34th Street traffic light (Eaton Elementary School on corner). Continue downhill to the WIS gate on right.

Virginia from Memorial Bridge

Take the right ramp down onto Rock Creek Parkway. Pass the Kennedy Center and take the second exit up to Massachusetts Avenue. Turn left and proceed past several embassies to the U.S. Naval Observatory. Turn right on 34th Street into the Cleveland Park residential neighborhood (Washington National Cathedral on left). Turn right on Macomb Street (Eaton Elementary School on corner). Go downhill to the WIS gate on right.


In 1912, the family of Alexander Graham Bell sold the property to Cleveland banker James Parmelee, who commissioned architect Charles Adams Platt to design the neo-Georgian mansion and grounds. Originally called “The Causeway,” the estate was purchased in 1940 by Ambassador Joseph Davies and his wife, Marjorie Merriweather Post, upon their return from Russia, and re-named Tregaron (Welsh for “village of three wells”). Washington International School acquired Tregaron in 1980.


The three-story, neo-Georgian mansion features a welcoming interior Foyer with pillars, high ceilings and brass chandelier, an ivory marble floor leading to a grand carpeted staircase with lattice railing. Directly ahead is the Goodman Room, which opens to the expansive outdoor canopied Stephenson Terrace overlooking Klingle Valley. To the right is Davies Hall. Both rooms feature pecan-wood paneling, dark green marble fireplaces, and parquet floors. There is a baby grand piano in Davies Hall. For outdoor events, guests can enjoy the Carriage House Courtyard, Dacha Garden, and Mansion Patios. There is also an informal picnic area with a grill adjacent to the west wing of the Mansion. Tents are permitted in several areas.

Capacity, Parking, and Restrooms


175 people or more, depending on set-up style.

Indoor/Outdoor Events

Davies Hall – 90
(9 round tables of 60" diameter for 10 guests each)

Goodman Room – 40
(5 round tables of 48" diameter for 8 guests each)

Stephenson Terrace with Canopy – 72
(9 round tables of 48" diameter for 8 guests each)

Solarium Patio – 100
(any combination of round tables)

Outdoor Events Only

Wooded Grove Patio with Fountain – 75-100
(75 chairs with center aisle)

Dacha Garden with Fountain – 175
(all seated in chairs with central aisle)

Grill/Picnic Area – 175


90 cars


Mansion (2) and Carriage House (2).
They are wheelchair-accessible.

Limitations and Restrictions

Liquor may be served, but amplified music is permitted indoors only. The rental contract includes an on-site security officer, who directs traffic, and requires the renter to provide proof of personal liability insurance. Events must end by midnight.

Aerial View and Dimensions

Reservations and Tours


(202) 243-1827

powered by finalsite