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Landmark buildings with historic windows are meant to last for centuries, so why put in a product that might only last 10 years?

Custom Window originally made its name by producing innovative, historically accurate windows for landmark buildings. Our reputation for historic windows is unsurpassed.

Here is how we provide you with some of the most innovative, highest performing, historically accurate windows on the market today:

  • Historically Accurate Sightlines
  • In almost every case, Custom Window can precisely replicate the original sightlines, right down to the steel putty glaze shape. It's not truly historic window replication without the same sightlines.


  • True Divided Lights
  • Historically accurate windows have true divided lights. They didn’t use applied grid, ever. Applied grid is a modern attempt to simulate a historic window. To be historically accurate, you need individual panes of glass separated by true divided light muntins.


  • The Custom Window Building Process
  • Every window uses our proprietary building process, so you know that the window is quoted accurately, engineered intelligently, built precisely and delivered on time and on budget.


    Every historic building has its own story and its own special requirements. Custom Window has experience in these areas and can help make the process smooth and efficient.

    We can replicate nearly any historic sightline in a true divided light window. This makes it easier to:


  • Get tax credits for your building.
  • Obtaining tax credits usually means building a historic window with modern performance ability. Custom Window has done this on countless projects. We can anticipate most of the issues in advance, helping to avoid complications.


  • Gain approval from historic districts.
  • Custom Window will work with you to ensure that the window provided is approved by any presiding historic districts.


    Replication is about the entire opening, not just the window. The product must be easy to install and anchor correctly. Appropriate sills and trim must be provided to complete the window and blend it seamlessly with the opening and the building itself. If a window doesn’t do all these things, it’s simply not good enough.

    We’re not just interested in putting in a passable window. We’re interested in the long term preservation of the building.

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