A window company organised around Landmarks approval.

Townhouse Windows & Doors works only on Manhattan's historic townhouses — Federal and Greek Revival houses in the Village, Italianate and Neo-Grec brownstones on the West Side and in Harlem, limestone fronts on the East Side. We do not work on new buildings or apartment towers, and we do not sell a product line.

We are organised around a single fact: on a landmarked house, the window is regulated as carefully as the façade it sits in. So the people who survey the house also draw it, the drawings are prepared for the Landmarks Preservation Commission from the start, and the same office files the application and answers the Commission's questions. Our workshop builds to those drawings, and our own crews install the work.

That arrangement is less common than it should be. It means the owner, the architect and the contractor deal with one firm that is responsible for the whole result — the survey, the approval, the window, and how it looks from the street.