Maple Lawn, also known as the Walter Vail House, is a residence in Balmville, New York, United States built in the Gothic Revival architectural style's Picturesque mode.

It was designed by Frederick Clarke Withers, following principles of his late mentor, Andrew Jackson Downing, and commissioned by a wealthy local family in 1859.

The south-facing front facade features a projecting central pavilion with white quatrefoil-pireced vergeboards at the overhanging eave.

Many of the original moldings and other wood trim remain, especially the Gothic fluted surrounds on the bay windows, which emerge from nearby pilasters.

After his death, Withers, who had worked for him following his emigration from his native England, was seen along with occasional collaborator Calvert Vaux as Downing's heir and successor.

[1] Maple Lawn, designed in the "villa" form Downing thought best as a country home for a man of "means", expresses his theories with its careful placement amidst the trees and view of the river.

Most notably, the dining room faces east so that the evening meal could be taken in the shade, while the parlor is across the house for diners to take advantage of the light afterwards, as per Downing's guidelines.