Tall arched double windows with divided panes in a white paneled room
Tall arched double windows with divided panes in a white paneled room. Photo: WesselArtPublic, CC BY-SA 4.0, via Wikimedia Commons.

Window replacement San Jose

Replacing San Jose windows, from aluminum sliders to Hensley sash

A San Jose retrofit window, set into the old frame with the flashing and stucco left alone, needs no building permit unless the house is on the city's Historic Resources Inventory. Then even a retrofit waits for Planning. The city lies wholly in the state Energy Code's Climate Zone 4, so replacement glass also faces a solar heat gain cap that San Francisco's coastal zone does not set.

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Retrofit, nothing altered
No building permit, unless the house is on the historic inventory
Glass limits, Zone 4
U-0.27, SHGC 0.23; or U-0.40, SHGC 0.35 for 75 sq ft or less
Permit route
Walk-in Simple Projects Service at City Hall, no plans needed
Fairglen Additions
Street-side frames replaced metal for metal; vinyl prohibited

The work

Window work that comes up across San Jose

  • New sliders inside the old tract-house frames

    A retrofit window fits the existing opening without disturbing the frame or its flashing, and San José does not require a building permit for one. The new unit still has to meet current construction standards as far as the opening allows. The city's own example: where an old window has become a noncomplying single-hung style, the replacement must be a style that complies. Bedroom openings are held to the emergency escape sizes for new construction as closely as the existing frame permits.

  • Full-frame replacement in a stucco wall

    Pulling out an old aluminum unit with its nailing fin changes the paperwork. San José requires a building permit when the flashing is altered, the nailing fin removed, stucco or other wall finish cut back to free the window, or the framing changed, for instance to drop a sill for egress. For a house, the walk-in Simple Projects Service issues it without plans, though changes to exterior walls need Planning's approval first, and a lot in a mapped A-zone floodplain, a geohazard or landslide area, the WUI, or with an open code case is sent to plan review.

  • Clerestories and window walls on a Fairglen Eichler

    The city's Eichler design standards for the Fairglen Additions treat the street-side window pattern as a primary feature. A replacement there must match the original's size, proportion and glazing pattern and use the same frame material, metal for metal, with clear glass. Vinyl and fiberglass frames, divided or simulated divided lites, glass block, bay windows and shutters are prohibited on windows visible from the street. Glass walls around an atrium stay, and no more than half of a rear window wall may be infilled.

  • Repairing original wood sash near downtown

    Your Old House asks owners of historic houses to repair before replacing: patch, splice or piece in rotted wood, strip built-up paint, renew the glazing putty, replace broken sash cords with new cords or chains, add weatherstripping and repaint. The Energy Code supports that choice. It counts new glass in an existing sash and frame, or new sashes in an existing frame, as a repair rather than a replacement, provided the result performs at least as well as the original.

  • Security for ground-floor openings

    On historic houses, the city's guide suggests wire glass, tempered glass or light metal security bars mounted on the inside of the window where feasible, and calls steel bars inappropriate. In the Fairglen Additions the Eichler standards go further and prohibit bars or other barriers in window openings visible from the street, steering owners toward motion sensors and cameras instead. Choosing glass and hardware with that in mind avoids ordering a window the city will not accept.

Hotel Valencia at Santana Row in San Jose
Hotel Valencia at Santana Row in San Jose. Photo: Payton Chung, CC BY 2.0, via Wikimedia Commons.

The houses here

Aluminum sliders, wood sash and Eichler glass walls

San Jose's 1999 Single-Family Design Guidelines describe the builder houses that fill much of the valley floor: windows most often sliding, casement or fixed, in plain, brushed or anodized aluminum frames, with sliding glass doors common. That is the window most owners here are replacing. Closer to downtown the stock is older, and the city's preservation guide, Your Old House, sketches the double-hung, Craftsman and casement sash, set in deep openings with substantial casings, found in the conservation areas and among the Hensley district's Victorians. Then there are the Eichlers. In the Fairglen Additions, built from 1959 to 1961, the street side shows little more than clerestory windows under the eaves, while floor-to-ceiling fixed glass and aluminum sliding doors face the atrium and the back yard. Each of those three calls for a different replacement.

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Get quotes for window replacement work in San Jose

Two short steps. A local pro who takes this work calls or texts you back.

To send a request, call or text (415) 449-8213.

Free to request, and you agree the scope and price with the person you hire before work starts. In California, a job over $1,000 in labor and materials, or one that needs a building permit, must be done by a contractor licensed by the CSLB in the right class. Ask for the license number and check it at cslb.ca.gov.

Permits and local rules

City and state rules a San Jose window bid must meet

  • When San José wants a permit

    The city's Window Replacements page, updated in April 2026, lists four triggers: an altered window frame, altered flashing including a removed nailing fin, exterior finish removed to take the window out, and a property on the Historic Resources Inventory, where even a retrofit needs a permit. An inventory listing also means a Planning clearance, or a Historic Preservation permit or adjustment, before the building permit. Inside a Planned Development zone, replacements follow that zone's architectural standards and any HOA rules.

    City of San José, Window Replacements (opens in a new tab)

  • Climate Zone 4 limits on replacement glass

    Section 150.2(b)1B of the 2025 Energy Code sends replacement windows to the values in Table 150.1-A, which for Climate Zone 4 are a maximum U-factor of 0.27 and a maximum solar heat gain coefficient of 0.23. A smaller job gets an exception: replacing no more than 75 square feet of vertical glass may use a U-factor up to 0.40 and an SHGC up to 0.35 in Zone 4. The same table sets no SHGC maximum at all for Zone 3, which covers San Francisco.

    California Energy Commission, 2025 Energy Code (opens in a new tab)

  • Historic houses: adjustment or house permit

    For a City Landmark or a house inside a City Landmark District, changes to windows count as minor exterior work handled through a Historic Preservation Permit Adjustment, reviewed by Planning staff without a public hearing. Other houses on the inventory, including those in a Conservation Area, go through a Single-Family House Permit and must follow Your Old House. That permit asks for a window schedule giving existing and proposed sizes, materials, color, sill and installation recess, operation, and the manufacturer's series.

    City of San José, Historic Resources permits (opens in a new tab)

  • Wildfire glazing in the city's WUI

    The San José Fire Department's WUI policy applies the state's wildfire construction rules, CBC Chapter 7A and CRC R337, to houses inside its mapped interface area, and for exterior windows that means tempered glazing. It reaches new buildings and additions or alterations to buildings permitted and constructed on or after July 1, 2008, so a WUI house built after mid-2008 that is getting new windows is covered. A lot in the WUI also cannot use the walk-in window permit and goes through Standard Plan Review.

    San José Fire Department, WUI Policy (opens in a new tab)

State license for this work: C-17 Glazing, B General Building. Look up a contractor's license on the CSLB website (opens in a new tab).

Part by part

Where the window rules shift inside the city

  • Hensley Historic District

    The largest concentration of Victorian-era houses left in San José, built mostly between 1880 and 1900 in Italianate, Stick-Eastlake and Queen Anne styles. As a City Landmark District, window changes here go through a Historic Preservation Permit Adjustment, and a double-hung original should be replaced with a double-hung match.

  • Hanchett and Hester Park, Naglee Park, Palm Haven

    City conservation areas from roughly 1906 to the 1940s, with Craftsman, Prairie and Spanish Revival houses. A listed house here takes a Single-Family House Permit for window work, and Your Old House treats raw, unpainted metal or plastic windows as inappropriate unless the substitute matches the original in dimension, profile and finish.

  • Fairglen Additions, Willow Glen

    A National Register district of 218 Eichler houses, placed on the city's inventory, and so the one tract where the Eichler standards govern window replacement today. Replacements on the street side stay metal-framed with undivided clear glass.

  • Valley-floor tracts and planned developments

    Swapping aluminum sliders in post-war and later subdivisions is usually a retrofit with no permit. Some subdivisions are zoned Planned Development; the city's Zoning Map shows whether a lot is, and if so that district's architectural standards and any HOA rules decide frame color and style.

Before you hire

Settle these before the windows are ordered

  • Will the old frames and nailing fins come out, and if so, who pulls the building permit before work starts?
  • What U-factor and SHGC are on the NFRC labels, and do they meet Climate Zone 4 or the 75-square-foot exception?
  • Is the house on the Historic Resources Inventory, and who prepares the window schedule Planning asks for?
  • For a Fairglen Additions Eichler, will every street-side replacement be metal-framed with clear, undivided glass?
  • Is the C-17 Glazing license number current on the cslb.ca.gov lookup?

Questions

Window questions San Jose owners ask first

Do I need a permit to replace the aluminum sliders in my San Jose tract house?

Usually not, if the new units are retrofits that sit inside the existing frames and leave the flashing and stucco untouched. A permit is needed once the frame is altered, the nailing fin or flashing is removed, or wall finish comes off. Even without a permit, the replacements must meet current standards for style, safety glass and egress as far as the opening allows.

Why do San Jose windows have a solar heat gain limit when San Francisco's do not?

Because they sit in different Energy Code climate zones. Table 150.1-A sets a maximum SHGC of 0.23 for Climate Zone 4, which takes in every San Jose ZIP code on the Energy Commission's list, and no SHGC maximum for Zone 3, which covers San Francisco. A replacement of 75 square feet or less in Zone 4 may go up to an SHGC of 0.35.

Can we put vinyl windows in our Eichler in the Fairglen Additions?

Not on the street side. The city's Eichler design standards prohibit vinyl and fiberglass frames, divided lites and shutters on windows visible from the street, and require a replacement to use the same frame material as the original. On secondary or rear walls, new or enlarged windows must match the material type of the original windows on that wall and have undivided panes.

Our 1910s house is in a conservation area. Can the original windows be replaced at all?

Yes, but repair comes first. Your Old House says original windows should be replaced only when refurbishment is not possible, and then matched as closely as possible: a double-hung for a double-hung, with the same number, size and position of panes. Fake muntins can work if they are applied inside and out to read like true divided lights.

We only want new glass in an old wood sash. Is that a window replacement?

Not under the Energy Code, which treats glass replaced in an existing sash and frame as a repair if it performs at least as well as the original. On a City Landmark, in-kind repairs that do not change the outside appearance also need no Historic Preservation permit. Changing the sash, frame or look of the window is a different matter.

Where these facts come from

Checked against these public sources in October 2026. Rules and programs change: confirm permit requirements with the city before work starts, and a contractor's license on the CSLB website.

Window replacement work in San Jose? Tell us what you see.

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