400 Mass

400 Massachusetts Avenue NW

Washington

20001

400 Mass is a full-service, 13-story luxury condominium in the heart of Downtown DC. Completed in 2004 at the corner of Massachusetts Avenue and 4th Street NW, it is best known for a resort-style rooftop with an outdoor pool, grills, and sweeping views of the Capitol and Washington Monument — steps from Gallery Place–Chinatown.

Year Built

2004

Total Units

256

Stories

Parking

Garage

Unit Sizes

Studio-3 Bedrooms

Price Range

$410,000 - $1,525,000

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Gallery Loctation Building Snapshot For Sale Past Sales Neighborhood Contact

Building Gallery

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400 Mass Front Exterior – 400 Massachusetts Ave NW, Washington DC

400 Mass Building Entrance – 400 Massachusetts Ave NW, Washington DC

400 Mass Lobby – 400 Massachusetts Ave NW, Washington DC

400 Mass Rooftop Lap Pool – 400 Massachusetts Ave NW, Washington DC

400 Mass Rooftop Terrace – 400 Massachusetts Ave NW, Washington DC

400 Mass Rooftop Grilling Pavilion – 400 Massachusetts Ave NW, Washington DC

400 Mass Rooftop Sundeck – 400 Massachusetts Ave NW, Washington DC

400 Mass Washington Monument View – 400 Massachusetts Ave NW, Washington DC

400 Mass Fitness Center Weights – 400 Massachusetts Ave NW, Washington DC

400 Mass Party Room – 400 Massachusetts Ave NW, Washington DC

Location & Neighborhood

Around the Neighborhood

400 Mass sits in the heart of Downtown DC, where offices, dining, hotels, and culture converge within a few walkable blocks. Residents are steps from Capital One Arena, the Walter E. Washington Convention Center, and a dense mix of restaurants and shops — from Busboys and Poets and Alta Strada to a full-size Safeway. Museums, theaters, and the National Mall are all within an easy walk or short ride.

Getting Around

Getting around is effortless from 400 Mass. Gallery Place–Chinatown (Red, Green, and Yellow lines) and Mount Vernon Square/Convention Center (Green and Yellow) are each a short walk, putting the entire Metro network within reach. Multiple bus routes and Capital Bikeshare stations are nearby, and quick access to I-395 and New York Avenue makes leaving the city simple. With a Walk Score in the high 90s, most daily errands are done on foot.

Market Snapshot

400 Mass Market Overview

400 Mass activity: median sales price $510,000, median 43 days on market, 96.7% sale-to-list, $511/sqft. Based on 17 building-level sales in the trailing 12 months. Recent range $410,000 – $1,525,000.

Median Sales Price

$510,000

Average Days ON Market

Sale-to-list Ratio

96.7%

Homes Sold (12 MonthS)

Recent Price Range

$410,000 – $1,525,000

Units with higher floors, outdoor space, and garage parking typically command a premium within this building. Varies by unit size, floor, and condition.

Explore Opportunities at 400 Mass

Current listings & upcoming opportunities
Private tour scheduling
Recent sold comps & pricing insights

Local condo specialists • Data-driven guidance • No pressure

How This Building Performs

400 Mass Market Performance & Ownership Profile

Market trends are based on recent sales activity and may vary by unit size, floor level, and condition.

Annual Sales Report for 400 Mass

Current listings & upcoming opportunities
Private tour scheduling
Recent sold comps & pricing insights

Local condo specialists • Data-driven guidance • No pressure

For Sale

Available Units at 400 Mass

Browse current listings and see what’s available now.

Explore the latest 400 Mass residences currently offered for sale below. Inventory in this building can move quickly and not every opportunity is publicly advertised. If you don’t see a unit that fits your needs (or none are showing right now), there may still be private/exclusive or coming soon homes available through agent networks. Reach out and we’ll share what we’re seeing off-market, confirm upcoming listings, and help you target the right floor plan, exposure, and price point.

Past Sales

Sold Units at 400 Mass

View sold condo units to get a general idea of pricing, finishes and details. For a full CMA Contact Us

Living in Downtown DC

Modern high-rise and mid-rise residential towers
Access to nearly every Metro line, cultural institutions, and major employers
Walkable to restaurants, museums, and entertainment
Building amenities in most residential buildings
Short commutes to downtown offices
Active streetscape with year-round retail and dining

Downtown DC (also known as City Center) is the District’s most connected, “step-out-your-door” neighborhood—where offices, dining, hotels, and culture all converge within a few walkable blocks. It’s ideal for buyers who want an effortless urban lifestyle with Metro access, minimal commute time, and the energy of the city at their fingertips.

The housing mix leans heavily toward modern, full-service condominium buildings with amenities like concierge services, fitness centers, and resident lounges. Many homes feature open layouts, floor-to-ceiling windows, and skyline or monument views, while select pockets nearby offer classic DC architecture for those who want a more historic feel.

Daily life here is built around convenience and choice: coffee shops and boutique fitness in the morning, galleries and theaters after work, and an ever-evolving restaurant scene on evenings and weekends.

With easy access to Logan Circle, Dupont Circle, Penn Quarter, and the National Mall, Downtown works as a true hub—close to everything, yet polished and livable.

If you’re weighing a move Downtown, the key is matching building style, amenities, and noise level to your priorities. I’m happy to share current inventory, off-market possibilities, and a short list of buildings that consistently stand out for lifestyle and long-term value.

Wardman in Downtown DC