The Capitol Grounds and Arboretum jurisdiction maintains and preserves the historic landscape of the Capitol campus.

The grounds encompass 286 acres, including Union Square, the 13-acre site situated between the U.S. Capitol's West Front and the National Mall. The jurisdiction provides professional grounds management services, vehicle and equipment maintenance, sustainable irrigation practices, masonry restoration and preservation of landscape elements and memorials.

The Arboretum of U.S. Capitol Grounds

The jurisdiction also provides snow removal and trash collection services. In addition, the jurisdiction supports major events, including presidential inaugurations, lying in state ceremonies, National Law Enforcement Officers Memorial services and the Capitol Christmas Tree selection and display.

Current Major Projects

Capitol Grounds and Arboretum Projects

View of the Summerhouse at the U.S. Capitol with the gates closed.

Summerhouse Maintenance

The Architect of the Capitol's repair and renovation of the Summerhouse fountain and surrounding landscape is complete. Additional landscape improvements to the grotto and surrounding planting beds will continue into the spring of 2024.

Our Stories

Capitol Grounds and Arboretum Work

Person outside.
Projects

A House for All Seasons

More than 140 years later, the Architect of the Capitol's Summerhouse still offers visitors respite. Recent maintenance efforts will help keep the site around for repeat visitors and first timers alike.
A tree on the U.S. Capitol campus.
History & Discoveries

The Original Olmsted Trees

Celebrating the history of tree planting and tree preservation at the U.S. Capitol Grounds by highlighting some of the oldest trees on the grounds.
A talented employee of an Architect of the Capitol sheet metal shop.

Expertise

Skillful Craftmanship

We serve in diverse roles applying both modern techniques and historical tradecrafts in the care and preservation of the Capitol campus.

Areas of Expertise