Window replacement Mountain View

Bedroom egress, flat-roof skylights and Monta Loma glass in Mountain View

Mountain View's guide to bedroom windows says replacing one takes a permit, with existing and new floor plans, and a house in an HOA adds the association's signed letter. The online permits the city issues without plans leave windows out. Its 2023 handouts print 2022 glass figures, while the 2025 Energy Code holds larger Climate Zone 4 replacements to a 0.27 U-factor. Houses on the city's Register also wait on a historic ordinance update scheduled for fall 2026.

Get free quotes Call or text (415) 449-8213
  • Free to request, no obligation to hire
  • Up to five local pros who take this work can reply
  • Rules on this page checked against 14 public sources, October 2026
Mountain View City Hall
Mountain View City Hall. Photo: Aleh Haiko, CC BY-SA 3.0, via Wikimedia Commons.
Bedroom window permit
Required for new or replacement egress windows, with floor plans
Online no-plans permits
Windows excluded; the siding permit rules out window replacement
Energy Code zone
Climate Zone 4 in ZIP codes 94040, 94041 and 94043
Historic Register
48 properties; ordinance update scheduled for fall 2026

Permits and local rules

Mountain View handouts and codes to read before ordering glass

  1. Emergency escape and rescue openings guide

    Revised in June 2023 and written to the 2022 California codes, this guide says a permit is needed to install new egress windows and to replace or remodel existing ones, obtained before work starts. Plans show the existing and new floor plans, exterior modifications need Planning review and approval before submittal, and a property overseen by a homeowners association adds a letter of authorization signed by the HOA. Its efficiency line lists a maximum U-factor of 0.30 and SHGC of 0.23 for replacement windows.

    Source: City of Mountain View Building Division (mountainview.gov)

  2. The skylight installation sheet

    Revised the same month, the skylight sheet requires a permit to install or replace a skylight and asks for the same signed plan set and HOA letter. One rule matters on townhouses and narrow lots: where a wall has to be fire-rated, as on shared townhouse walls or a house less than 5 feet from the property line, a skylight stays at least 6 feet from that wall. It lists skylights up to 16 square feet at U-0.55 and SHGC 0.30, figures from the 2022 Energy Code.

    Source: City of Mountain View Building Division (mountainview.gov)

  3. Historic Preservation Ordinance and Register update

    Under the 2004 ordinance, every minor and major alteration to a house on the Register, now 48 properties, goes to a zoning public hearing, and to the City Council when a property is eligible for the California or National Register. The update, scheduled for adoption in fall 2026, would treat in-kind replacement of doors and windows as a minor alteration approved by staff and keep new openings among the major ones. A Historic Preservation Permit request filed in October 2025 for a Loreto Street house included altering openings.

    Source: City of Mountain View Planning Division (mountainview.gov)

  4. Glass limits in Climate Zone 4 since 2026

    All three Mountain View ZIP codes fall in Climate Zone 4 on the Energy Commission's ZIP table. Under the 2025 Energy Code, replacing 75 square feet of windows or less may use a U-factor of 0.40 with a 0.35 heat gain limit; a larger replacement meets Table 150.1-A, which lists U-0.27 and SHGC 0.23 for Zone 4. Replaced skylights are held to U-0.40 and SHGC 0.30, tighter than the 0.55 on the city's 2023 sheet. Ask the Building Division which figures its inspectors now check.

    Source: California Energy Commission, 2025 Energy Code (energy.ca.gov)

State license for this work: C-17 Glazing, B General Building. Look up a contractor's license on the CSLB website (cslb.ca.gov).

Free, no obligation. Next, add your details in the request form.

Free request

Describe the window replacement job once. Local pros who take work in Mountain View reply by call or text.

  • No fee to request, and no obligation to hire
  • You agree scope and price with the pro you choose
  • Photos help them quote without a first visit

Get quotes for window replacement work in Mountain View

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.

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.

The houses here

Bungalow sash, Ranch picture windows and Monta Loma's rear glass

The city's historic context statement, a final draft dated August 2026, traces the three window types a replacement here usually meets. Shoreline West, Castro City and Jackson Park keep Craftsman bungalows and cottages from about 1910 to 1935, with wood sash windows of small-paned lites. Postwar Ranch houses commonly put a picture window on the street side. In Monta Loma, the Eichler, Mackay and Mardell Manor tracts of the mid-1950s stay modest toward the street and open the rear to expansive glazing. The same document calls window replacement a common alteration made for energy efficiency, and says what counts most for a house's historic standing is keeping the original openings and setting the new units inside them.

Part by part

Mountain View neighborhoods where the glass differs

  • Monta Loma

    The Fairview tract Eichler built around 1954 to 1957, about 200 houses designed by Anshen & Allen and Jones & Emmons, sits beside John Mackay's Oakwood of 1955 and 1956, also drawn by Anshen & Allen, and the 234 Mardell Manor homes. The Eichlers are low and one-story, modest at the street and open at the rear through expansive glazing, and Oakwood shares many of their features, so the big panes face the back yard.

  • Bell Meadows

    Eichler's second Mountain View tract, 53 four-bedroom houses from 1972 between Permanente Creek and Miramonte Avenue at Trophy and Eichler drives, carries Claude Oakland's later rooflines: wide low gables, and steep central gables flanked by flat roofs. Built in the 1970s, the tract falls inside the age range the citywide historic survey screened.

  • Shoreline West, Castro City and Jackson Park

    These are the neighborhoods the context statement names for free-standing houses from about 1910 to 1935, mostly Craftsman bungalows and vernacular cottages with wood sash and small-paned lites. Every one of them predates 1978, which brings EPA's renovation rule to any window job there.

  • Townhouse and condominium complexes

    Both the egress and the skylight handouts ask for a letter of authorization signed by the homeowners association when one oversees the property, and the skylight sheet adds the 6-foot setback from fire-rated walls that shared townhouse walls bring.

The work

What a Mountain View window order turns into at the permit counter

  1. Swapping a bedroom window

    The city's emergency escape guide covers every sleeping room and asks for one electronic set of plans, at least 11 by 17 inches and digitally signed, showing the existing and new floor plans. An exterior change goes to Planning for approval before the Building Division sees it. Section R319.5 of the 2025 California Residential Code frees a replacement from the escape-size rules when it is the manufacturer's largest standard size that fits the existing frame or rough opening and opens the same way or wider.

  2. A skylight on a near-flat roof

    The context statement describes Monta Loma's Eichlers as having low-pitched gable or shed roofs, or flat ones, and the city's skylight handout requires a permit to install or replace a skylight, tubular units included. On a roof pitched under 3 in 12, a unit skylight sits on a curb at least 4 inches tall unless the maker's instructions say otherwise. An operable skylight stays 10 feet from plumbing vents, unless the vent ends 3 feet above it, and 3 feet from exhaust openings such as a bathroom fan.

  3. Sliding panels in an Eichler window wall

    Under Section R324.4.1 of the 2025 code, the glass in the fixed and operable panels of a sliding door is a hazardous location that needs safety glazing. The rule for glass beside a door exempts glass next to the fixed panel of a patio door, yet a big rear pane can still fall under the window rule: over 9 square feet, its bottom under 18 inches from the floor, its top above 36 inches, a walkway within 36 inches. Every safety pane carries a permanent mark left visible after installation.

  4. Original sash in the pre-1935 neighborhoods

    A bungalow built between about 1910 and 1935 is pre-1978 housing under EPA's renovation rule, which names window replacement as covered however little paint the job disturbs. The firm doing it needs EPA's renovation credential and lead-safe work practices. Where the house might be historic, the context statement is plain about what to protect: the configuration and dimensions of the window openings, with the new windows set within the original frame openings rather than resized to stock units.

Before you hire

Ask these before a Mountain View window contract is signed

  • Will each bedroom unit be the maker's largest standard size that fits the old frame, so Section R319.5's exemption from the size rules holds?
  • Does a homeowners association oversee the property, and do you have its signed letter of authorization for the permit application?
  • Do the quoted units meet the 2025 Zone 4 figures rather than the U-0.30 printed on the city's 2023 egress guide?
  • For a house built in the 1970s or earlier, has anyone checked whether it is on the Register or eligible for it?
  • Does the firm hold EPA's renovation credential for a pre-1978 house, and is its C-17 Glazing license active at cslb.ca.gov?

Free, no obligation. Next, add your details in the request form.

Questions

Mountain View window questions, from Monta Loma to Old Mountain View

Does replacing a living-room window in Mountain View need a permit, or only bedroom windows?

The city's list of projects that need no building permit follows Section R105.2 of the residential code and includes window awnings, but no windows. The escape-opening guide is explicit for sleeping rooms: a permit before work starts, with existing and new floor plans. For other rooms, ask the Building Division by email before ordering, and expect a plan set rather than an online form, since the permits issued online without plans do not cover windows.

Can our contractor file the window permit online without plans, like a water heater?

No. Mountain View issues a set of like-for-like permits online without plans for single-family homes and duplexes, covering items such as AC units, panel upgrades, furnaces, heat pumps, water heaters, siding and tub replacements. Windows are not on that list, and the siding replacement permit is not available when the work includes window replacement, so new siding around new windows goes through regular review.

Our Monta Loma Eichler is not on the Register. Will historic review slow a window job?

The ordinance applies to properties on the Mountain View Register. When the city ran its intensive survey in 2024, previously unidentified R1- and R2-zoned properties were left out at City Council direction, so most tract houses were not studied one by one. The Council is scheduled to take up the updated Register in the last quarter of 2026, so check the address with the Planning Division if the house might be added.

Why do the city's handouts show different glass numbers than our window quote?

Both sheets were revised in June 2023 and are based on the 2022 codes. The egress guide lists U-0.30 for replacement windows and the skylight sheet U-0.55 for small skylights. The 2025 Energy Code sets Zone 4 at U-0.27 for larger window replacements and U-0.40 for any replaced skylight, so a quote written to the newer numbers is not wrong. Confirm with the Building Division before ordering.

Can a historic Mountain View house get new windows without a public hearing?

Under the 2004 ordinance, minor and major alterations to a Register property both go to a hearing. The update scheduled for fall 2026 would let staff approve in-kind window and door replacement as a minor alteration, while new openings stay major. Applications may need an architectural historian's analysis showing that character-defining features are not affected. Ask the Planning Division which version applies on the day you file.

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.

  • mountainview.gov: 638236397304000000 (mountainview.gov)
  • mountainview.gov: 638236409138930000 (mountainview.gov)
  • mountainview.gov: submitting for building permits (mountainview.gov)
  • developmentpermits.mountainview.gov: same day permits (developmentpermits.mountainview.gov)
  • developmentpermits.mountainview.gov: projects that don t require permits (developmentpermits.mountainview.gov)
  • mountainview.gov: historic preservation and register update (mountainview.gov)
  • mountainview.gov: 639189282940000000 (mountainview.gov)
  • mountainview.gov: 639225800108070000 (mountainview.gov)
  • ceqanet.lci.ca.gov: 2025100784 (ceqanet.lci.ca.gov)
  • energy.ca.gov: CEC 400 2025 010 F (energy.ca.gov)
  • energy.ca.gov: BuildingClimateZonesByZIPCode ada (energy.ca.gov)
  • codes.iccsafe.org: chapter 3 building planning

Window replacement work in Mountain View? Tell us what you see.

One request reaches local handymen and contractors who take this work. The Handyman SF connects you with them; it does not do the work.

Get free quotes Call or text (415) 449-8213
HandymanNow for handymen Work in Mountain View? Get job leads by text. Pick your trades and areas, take only the jobs you want. No subscription. Start getting leads HandymanNow for homeowners Get the HandymanNow app. Send a request with photos, message your handyman and follow them on the way. Download the app

HandymanNow app

Fix it faster. Find work faster.

Homeowners send a job with photos and follow their handyman on the map. Handymen get local jobs by text and take only the ones they want.

Get the appHomeowners · free Get job leadsHandymen · no subscription
Get it onGoogle PlaySoon onApp Store
Call WhatsApp (opens WhatsApp) Free quote