Quality Hill
Also known as The John Thomson Mason House; Worthington House
Many listed buildings are private homes. Please enjoy them from the street.
About Quality Hill
Quality Hill, at 3425 Prospect St., NW., was added to the National Register of Historic Places on Mar 16, 1972. The Register lists it for its architecture, at the state level. It describes its style as Georgian, as it does for 14 other District of Columbia listings. Nine more Register listings are within a quarter mile.
What it isHistoric house in Washington, D.C., United States. From Wikidata (CC0). Read about it on Wikipedia ↗
PDFRead the original nominationThe form that put it on the Register, with its history, photos and a map · 38 MB · National Archives↗Make it a walk: 5 landmarks in about 10 minutes
3425 Prospect St., NW., Washington · about 0.3 miles on foot, as the crow flies
18 more Register listings within half a mile
★ National Historic Landmark · D district · B building · S site. Each opens its own page.
Georgian style, nearby
Other National Register listings within 25 miles described as Georgian.
Memories of Quality Hill
The record says what it is. Neighbors know what it means.
Your answer becomes a post in Town Square.
Questions about Quality Hill
Is Quality Hill on the National Register of Historic Places?
Yes. It was added on Mar 16, 1972 (Register number 72001431).
Is Quality Hill a National Historic Landmark?
No. It is on the National Register; District of Columbia has 75 National Historic Landmarks. The nearest is Healy Building, Georgetown University, 0.2 miles away.
Can you visit Quality Hill?
Our record doesn’t say whether it is open to visitors. Many listed buildings are private, so it may only be seen from the street.
Where can I read the history of Quality Hill?
In its National Register nomination, the form that put it on the Register: a 38 MB PDF at the National Archives, linked on this page.
Sources: National Park Service, National Register of Historic Places (05/22/2026) · National Archives catalog record 117692436 · Wikidata. Map tiles © OpenStreetMap contributors.