Vertner Woodson Tandy  designed St Phillips Church, financed and designed and utilized by Blacks[ st Phillips black church congregation]
Villa Lewaro financed and designed and utilized by Blacks[madam cj walker and her daughter] 
Madame CJ Walker's Townhouse in Harlem - financed and designed and utilized by Blacks[madame cj walker]

ST Phillips Church

The present church building designed by Vertner Woodson Tandy, the first African American registered architect in New York, was dedicated on March 25, 1911 and was granted landmark status on July 15, 1991.

St. Philip's Episcopal Church (Harlem, New York) (1910), 204 West 134th Street

https://www.stphilipsharlem.org/history-continued

Villa Lewaro, the $250,000 mansion for the daughter of the Harlem millionairess Madam C. J. Walker, in Irvington on Hudson, New York. The Italianate-style mansion was completed in 1918.

was owned by Harold Doley and now is owned by Richelieu Dennis.

https://en.wikipedia.org/wiki/Villa_Lewaro

Madam CJ Walker Townhouse  sometimes called the Dark Tower

Old photos

Byron Company (New York, N.Y.) Museum of the City of New York. 93.1.1.10838
The exterior of the townhouse at 108 and 110 West 136th Street, circa 1916.

Byron Company (New York, N.Y.) Museum of the City of New York. 93.1.1.10840
The reception room at Walker Hair Parlor and Lelia College of Beauty Culture, circa 1916.

Byron Company (New York, N.Y.) Museum of the City of New York. 93.1.1.10842
The tearoom at Walker Hair Parlor and Lelia College of Beauty Culture, circa 1916.

Byron Company (New York, N.Y.) Museum of the City of New York. 93.1.1.10836
The music room at the townhouse, circa 1916.

Byron Company (New York, N.Y.) Museum of the City of New York. 93.1.1.10835
A'Lelia Walker's bedroom at the townhouse, circa 1916.

URL
https://savingplaces.org/stories/how-alelia-walker-and-the-dark-tower-shaped-the-harlem-renaissance#.YMYHJFUpCUA

The Dark Tower was a townhouse on 108 West 136th Street in Harlem, Manhattan, New York City,
https://en.wikipedia.org/wiki/Dark_Tower_(building)

what became of it
But in 1941, the mansion, which by then belonged to the city, was torn down and became the Countee Cullen Branch of the New York Public Library.
https://www.thecuriousuptowner.com/post/here-s-what-became-of-madam-c-j-walker-s-grand-harlem-mansion

He also designed the Ivey Delph Apartments which were for NY City
made through his architectural firm of Tandy & Foster. The Ivey Delph Apartments, designed in 1948, was listed on the National Register of Historic Places in 2005.