The symptom
I want a window that catches a breeze, but the old hinged sash hangs crooked and will not pull tight against the seal.
The proposed method
Ask the provider to identify the proposed opening direction, frame scope and operating hardware. Confirm how the sash will clear nearby fittings and how opening, closing and latch engagement will be checked. Have retained trim, perimeter finishing and any separate opening repairs listed alongside the selected window.
Items to discuss
casement or awning frame, hinged sash, operator, hinges, locking hardware, compression gasket, flashing. Clarify which parts or materials would be supplied, which tools would be used, and what documentation is included.
Property context in Treasure Island
Planning recorded 178 completed new housing units in 2025, making recently installed multi-unit systems a current local consideration.
Source for local context ↗San Francisco's Department of Building Inspection publishes step-by-step instructions for over-the-counter permits covering doors, windows, reroofing and other common exterior residential projects. The page lists in-kind window replacement and in-kind exterior door replacement, at the same size and location, among the projects eligible for over-the-counter review through the PermitSF portal, and separately says that new windows or exterior doors in new locations are among the projects that need plans. Read it before agreeing a scope, and confirm the address, the opening and the review route with the department. It does not decide eligibility, timing or requirements for an individual property.
Source for planning your work ↗Area-wide context is not a finding about your own property.
What shapes the quote?
The component being changed
Glass-only, hardware-only and complete-frame work involve different materials and labor. Compare proposals for the same work.
Access and concealed condition
Opening size, access, finishes and damage discovered during removal can change the work. Agree how any change will be documented.
The complete proposal
Clarify removal, disposal, weatherproofing, finish restoration and completion checks before comparing totals.
Ask for a written quote and confirm the complete charge before work begins.
Before the visit
A little preparation helps.
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