Replacing windows in San Francisco can prove to be a formidable undertaking, particularly if you're unfamiliar with the requisite procedures, which include obtaining approval from the San Francisco Planning Board. Consequently, numerous potential obstacles may impede or entirely halt the application process. The majority of residents lack awareness of the specific guidelines and challenges involved. In the following, we will provide a concise overview of the essential steps to successfully navigate this intricate process, yielding the swiftest and most favorable outcomes. It is important to note that even for seasoned professionals like us with years of experience in window installation in San Francisco, the application process can still be arduous, protracted, and occasionally exasperating.

ARCHITECTURAL CHARACTER & AESTHETIC REQUIREMENTS
According to the San Francisco planning board, windows visible from public streets or other rights-of-way play a pivotal role in defining a neighborhood's character and contribute significantly to the unique architectural identity of each building. When proposing the replacement of windows in any type of structure within San Francisco, it is imperative that the new windows align with both the neighborhood's character and the specific architectural features of the building they are intended for. This alignment encompasses various aspects such as size, glazing, operation, finish, exterior profiles, and arrangement. Failure to meet these requirements will result in the disapproval of the application.

Should window replacement become necessary, the San Francisco Planning Board mandates that applicants meticulously document and assess the structural and architectural details of the window, seeking professional guidance as a prerequisite. This requirement is non-negotiable, and failing to adhere to it significantly diminishes the likelihood of obtaining approval for new window installations. Fortunately, the Window Station of San Francisco is well-equipped to assist with the complexities of this process for your projects.

In San Francisco, the Planning Department reviews every window permit application on a case-by-case basis without exception when seeking to replace windows in your structure. They have specific information requirements for processing window replacement applications, which must be met. It's essential to note that buildings categorized as City Landmarks or within historic city districts (as per Article 10 of the Planning Code) have even more stringent requirements, necessitating a Certificate of Appropriateness for any exterior work. Additionally, buildings falling under Article 11 of the Planning Code must undergo a review for historical architectural compatibility by the Zoning Administrator. Regardless of the category, approval must be secured before any building permits are issued for your San Francisco property. It's important to be aware that the Planning Department staff may request further information, extending an already time-consuming process. They will address your case on their timeline and may require additional fees or permits without prior notice or recourse.

HISTORIC WINDOWS
In cases where original or historic windows are currently in place and you are proposing new window replacements, the requirements become even more exacting. When seeking approval to replace historic windows in San Francisco, the selected replacements must precisely match the existing windows in terms of overall dimensions, size, glazing, operation, material, finish, exterior profiles, and arrangement. The planning department will request that you submit the following checklist for their review:

- Comprehensive photographs of the entire building taken from the curb.
- Streetscape photographs depicting the immediate block.
- Close-up photographs capturing the different types of windows slated for replacement, including any millwork or brick molds between the windows and surrounding window openings.
- A site plan or clear aerial photograph illustrating your building and the adjacent walls of neighboring structures on each side, along with comprehensive photos of each elevation where the proposed window replacement is intended.

Applicants will also be required to provide detailed specifications for the proposed windows, including measurements for components such as the head, jamb, meeting rail, sill, and more. These specifications should encompass the exterior profiles of the windows, including any brick molds and surrounding exterior millwork.

The Planning Department seeks comprehensive information regarding the materials, dimensions, and appearance of both the existing windows and the replacement windows, necessitating precise measurements. Additionally, we recommend referring to the manufacturer's product data sheets, which often contain the necessary information for the new windows under consideration. Should you require this data, the Window Station of San Francisco is readily available to assist you when you enlist our services.

WINDOWS WITH DIVISIONS
If the current windows have divisions (muntins) they can be replaced with either true divided light or simulated divided light (SDL) windows as long as the new windows match the historic size, glazing, operation, finish, exterior profiles and arrangement. The SDL windows must meet the additional requirements detailed by the San Francisco planning board.

WINDOWS WITH EXTERIOR MILLWORK & BRICK MOLDS
If you intend to replace or modify the profile of exterior millwork or brick mold, the San Francisco planning boards mandate the submission of detailed information regarding both the existing and proposed new millwork or brick molds, including precise dimensions. In cases where the original or historic windows are no longer present, property owners have the choice of retaining the existing window or replacing it with a compatible sash. Once again, the San Francisco planning board will require you to provide the necessary information for their review. Here is a list of what you'll need to submit:

- Photographs of neighboring buildings and their windows on each side of your own building.
- Photographs of neighboring buildings directly across the street, along with images of their windows.
- For corner lots, include photos of the subject building and the other three intersections, highlighting the windows closest to each corner.

As you can likely discern, the process of applying for a window permit in San Francisco is a complex undertaking. If you choose to navigate it independently, we hope this information proves valuable. However, should you require professional assistance, we would be more than willing to guide you through the process.