Window Replacementin Claremont, CA
Window replacement in Claremont needs a building permit, because the City lists window and door installation as permit work. In the Historical Claremont and Arbol Verde districts, replacement windows that match the originals go to staff review. Homes built before 1978 also trigger federal lead-safe rules, whatever the size of the job.
Claremont's windows tell its building history. Pomona College moved here in early 1890, the city incorporated on October 3, 1907, and a Claremont Courier history describes the older neighborhoods as mostly Craftsman houses from pattern books and merchant builders, with Spanish Revival landmarks such as the 1930 Padua Hills Theatre. The Census ACS 2024 five-year estimates put 8.8 percent of homes at 1939 or earlier and 37.6 percent before 1960, and many window jobs start with a house that old.
This page covers the questions specific to Claremont: the permit line, matching windows on historic properties, fire zone glass in the foothills, lead-safe rules, summer heat and bay window projections. MDG Builders (CSLB #1040337) measures, orders, permits and manages the job, and a licensed subcontractor does the installation. Prices and the phase timeline are on our windows page, and the Claremont overview lists the other trades we manage here.
What Claremont's codes and federal rules say about window work
Where windows permits come from in Claremont: City of Claremont Community Development Department, Building Division.
- The City of Claremont lists window and door installation as permit work, and also remodels that add or remove a wall, window or door or enlarge a window or door opening.
- For Claremont's cultural resources, replacing original windows or doors with matching materials, form and color, including muntin and mullion patterns, needs only staff review, and replacing incompatible, previously replaced units with compatible ones also needs staff review (16.302.130(B)(4) and (5)).
- EPA's lead rule treats window replacement in housing built before 1978 as covered work regardless of square footage, so the small job exemption does not apply to windows, and the firm must be EPA certified and use lead safe work practices.
- Claremont adopts the California Energy Code, 2025 Edition (15.18.010). The chapter text read showed no local window or cool roof amendment, so window performance values come from the state Energy Code. Confirm the climate zone values with the Building Division.
- CSLB defines the C-17 Glazing classification as a contractor who selects, cuts, assembles or installs all makes and kinds of glass and glass work, including frames, panels, sashes and doors.
- Claremont's 16.130.020.A allows cornices, eaves, bay windows and similar features that add no floor area to project up to 4 inches per foot of required setback, with a 2 foot maximum, which limits how far a bay window can project into a setback.
Sources for these rules
- claremontca.gov: When do I need a permit
- gocodebook.com: chapter 16.302 cultural resources preservation
- epa.gov: renovation repair and painting program contractors
- gocodebook.com: chapter 15.18 energy code
- cslb.ca.gov: Licensing Classifications Detail
- gocodebook.com: chapter 16.130 setbacks yard landscaping standards heights o
Do you need a permit to replace windows in Claremont?
Yes, on the City's own list. Claremont's permit page names window and door installation as permit work and, separately, any remodel that adds or removes a window or enlarges an opening, and it says the list is not all-inclusive. We found no Claremont exception for a same-size swap, so we plan on a permit every time and confirm the scope for your address.
The City page lists no fee. Fees are set by City Council resolution and paid when the permit is issued, according to the amended administrative chapter, which we read through the third-party GoCodebook mirror. Intake runs through the Building Division at (909) 399-5471, with plan uploads on its online form and permits issued in person at City Hall.
A permit also settles who may do the work. California's $1,000 limit on unlicensed minor work does not apply when a permit is needed, according to CSLB bulletin 24-07, so a Claremont window job needs a licensed contractor even when it costs less than $1,000. CSLB defines the C-17 Glazing class as selecting, cutting, assembling or installing glass and glass work, including frames, panels, sashes and doors, and you can ask us for the subcontractor's license number.
Replacement windows for a Claremont Craftsman: when staff review is enough
On a Claremont register property or a district contributor, the cultural resources chapter, section 16.302.130, sends two kinds of window work to staff review. Replacing original windows or doors with units that match in material, form and color, including muntin and mullion patterns, is one. Replacing earlier incompatible replacements with compatible ones is the other. Anything else that affects a listed or potentially eligible resource goes to the Architectural and Preservation Commission.
The Historical Claremont (HC) and Arbol Verde (AV) districts add architectural review for exterior modifications, and the HC district's stated intent is that character-defining features be maintained and new materials be compatible with the old. A vinyl sash with a different grid from the original wood window is exactly the case to ask about before ordering. The City says its design guidelines cover each of its 30 neighborhoods.
Ask Planning for the review level in writing, and photograph every elevation first. Ordinary maintenance and repair that needs no building permit is exempt from that review, so repairing an original sash is a real option.
Fire zone glass: do foothill replacement windows need tempered panes?
The honest answer is that Claremont's own text does not tell us. The City adopted the 2025 California Wildland-Urban Interface Code as Chapter 15.07 and repealed its old Chapter 7A amendments effective November 25, 2025, and the chapter text we read lists no local amendments, so the state code's window provisions apply by reference. We did not read those provisions, and we did not read which class any Claremont parcel falls in.
For comparison only, the Los Angeles fire zone checklist asks for exterior windows to be multilayer glazed panels with at least one tempered pane, glass block or glazing with a 20 minute fire rating, and Angi advises metal frames in wildfire-prone areas. That is a City of Los Angeles document, not Claremont's. Whether a window-only replacement triggers a similar rule in Claremont is a question for the Building Division, and we put it in writing before ordering glass.
On map status, CAL FIRE released updated Claremont maps on March 24, 2025, and the City Council approved the map as presented on July 22, 2025, with Los Angeles County Fire protecting the city under contract. The code calls the entire foothills area Fire Zone Four, an older term. Look up your parcel on the City's fire severity zone page.
Lead-safe window replacement in a Claremont house built before 1978
Window replacement is the one job the federal lead rule never treats as small. EPA's Renovation, Repair and Painting rule requires any firm paid to disturb paint in housing built before 1978, including general contractors and sole proprietors, to be certified, and it exempts minor work only at 6 square feet or less per room inside or 20 square feet or less outside. Window replacement is covered regardless of size.
Census ACS 2024 five-year estimates put 75.1 percent of Claremont homes before 1980, and that 1980 cutoff is a proxy for the 1978 lead-paint ban, not an exact count. Treat a house as covered unless its build year clearly says otherwise, and ask the contractor for its EPA certification number.
Ask also that old sash and trim leave the house in sealed bags or a covered bin, and that the work area is sealed with plastic before the first sash comes out.
Which windows suit Claremont's summers and the state Energy Code?
Claremont's heat is the reason to talk about glass, not only frames. NOAA's 1991 to 2020 normals for the Pomona/Fairplex station show an August average high of 92.4 degrees Fahrenheit, 70.5 days a year at or above 90 and 10.7 at or above 100, and the station sits on the valley floor, so the foothills may differ. Claremont itself sits at 1,168 feet.
The state's Energy Code sets the window performance numbers, and Claremont adopts the 2025 edition in section 15.18.010 with no local window amendment in the chapter text we read. The values depend on your climate zone and on whether the job is an alteration, and city handouts we have seen disagree on U-factor and solar heat gain, so we print none. LADBS, for example, requires dual glazing labeled by the National Fenestration Rating Council for replacement windows in houses of three stories or less, citing Title 24, Part 6. Ask the Building Division whether it asks for the same.
Glass choices add up per window. Angi's July 2026 Los Angeles page lists double-pane glass at $500 to $2,000, low-E coating at $300 to $1,100 and tempered glass at $200 to $700, so settle the glass package before you compare bids.
Bay windows, enlarged openings and egress: changes that are not like-for-like
A swap that changes the opening is a different job. The City lists adding or removing a window and enlarging a window or door opening as permit work, and cutting a larger opening takes framing and a header, so it is priced and reviewed as a remodel, not a replacement. ConsumerAffairs reports $3,200 to $6,500 for a new or enlarged egress opening in the Los Angeles area, though it states no method.
Bay windows have a projection limit. Section 16.130.020.A of the zoning code lets cornices, eaves, bay windows and similar features that add no floor area project 4 inches per foot of required setback, up to 2 feet, so a bay facing a 5 foot setback can project about 20 inches.
We have not read Claremont's bedroom egress or safety glazing requirements, so we print no dimensions. Ask the Building Division for the opening size and sill height a bedroom window must meet, and which locations, such as tub enclosures and doors, need tempered glass, before any window is ordered.
What do replacement windows cost for a Claremont house, and how long does it take?
Our windows page shows regional figures: about $550 to $1,150 per installed vinyl window, $950 to $2,400 for wood or fiberglass, and $14,000 to $28,000 for a whole house of 10 to 15 windows, from ConsumerAffairs' Los Angeles page and cross-checked against Angi's July 2026 average of $19,356. A lead-generation page for the 91711 ZIP code that we opened quotes $564 to $1,410 per window and gives no method, so we do not rely on it.
The timeline is mostly waiting: 1 to 2 weeks to measure and quote, 4 to 8 weeks to manufacture, then 1 to 3 days to install and 1 to 3 days to repair stucco and trim, with the inspection the same week. Claremont gets about 11.47 of its 14.47 inches of rain from December through March, so an install outside those months leaves fewer open walls exposed.
On resale, Remodeling magazine's 2025 report shows vinyl window replacement recouping 83.2 percent of a $23,783 job cost in Los Angeles. Claremont's median owner-occupied home value is $897,000 in the 2024 Census five-year estimate, but the report's reference job is not in Claremont and its window count is not published.
Window photos from Claremont and nearby communities
Seven window details tied to Claremont neighborhoods and nearby places such as La Verne, Upland and Montclair, from flashing to finished frames. Tap a photo to enlarge it.
What windows costs around Claremont
Treat every number here as a regional range from our windows page. A Claremont bid moves most with fire zone glass, matching a historic window and lead-safe containment, and a written proposal lists each as its own line. Our subcontractor guide explains who does what on a managed job. Pomona, La Verne, Upland, Montclair and San Dimas are separate cities with separate permit counters, so see Pomona, and for comparison Glendora, Glendale, Pasadena and Los Angeles. The same house may need a bathroom remodel in Claremont, ADU construction in Claremont or a room addition in Claremont, and our license check guide shows how to verify any contractor.
| What it covers | Typical range |
|---|---|
| Vinyl window, installed, each | $550 to $1,150 |
| Wood or fiberglass window, installed, each | $950 to $2,400 |
| Whole house, 10 to 15 windows | $14,000 to $28,000 |
| Glass options, per window | Double-pane $500 to $2,000. low-E $300 to $1,100. tempered $200 to $700. |
| Remodeling Cost vs. Value 2025, Los Angeles | Vinyl $23,783. wood $27,913. |
| New or enlarged egress opening | $3,200 to $6,500 |
Claremont window replacement questions, answered
Do I need a permit to replace windows in Claremont?
Yes. The City's permit list names window and door installation as permit work, along with remodels that add, remove or enlarge a window opening. We found no exception for a same-size swap. Fees are set by City Council resolution, and the Building Division at (909) 399-5471 can confirm the process for your address.
Do you need a permit to replace windows in California?
Usually, because most cities list window replacement as permit work, though each sets its own rule. Claremont does. Los Angeles treats a same-size change-out as an express permit with no plan check, and other cities may differ, so ask your building department. The $1,000 unlicensed work limit does not apply once a permit is needed.
How much does it cost to replace windows in California?
Regional figures run about $550 to $1,150 per installed vinyl window and $14,000 to $28,000 for a whole house of 10 to 15 windows. Wood and fiberglass cost more. Those come from Los Angeles area sources, not a Claremont study, and fire zone glass, historic matching and stucco repair raise the total. A written proposal prices your own count.
Do I need special fire-resistant windows if I live in a hillside fire zone?
Possibly, but we could not confirm Claremont's window rule. The City adopted the 2025 Wildland-Urban Interface Code, and CAL FIRE updated its Claremont maps in 2025. Los Angeles asks for multilayer glazing with a tempered pane in its zones, but that is not Claremont's document. Ask the Building Division what your parcel needs before ordering.
How long does it take for new windows to be installed?
Installation takes 1 to 3 days once the windows arrive, but ordering takes longer. Plan on 1 to 2 weeks to measure and quote, 4 to 8 weeks to manufacture, then 1 to 3 days for stucco and trim repair. Custom sizes, fire zone glass and historic matching add lead time, and the inspection follows the same week.
Are double pane windows required in California?
In practice, yes for most replacement windows. Los Angeles requires dual glazing labeled by the National Fenestration Rating Council for replacements in houses of three stories or less, citing the state Energy Code. Claremont adopts the 2025 Energy Code with no local window change that we saw, so ask the Building Division for your climate zone's values.
Is replacing home windows worth it?
It depends on the windows you have now. Remodeling magazine's 2025 report for Los Angeles shows vinyl replacement recouping 83.2 percent of its cost at resale, and comfort and noise count too. We print no energy savings figure because we found no independent Claremont number, but 70.5 days a year at or above 90 degrees make the glass choice matter.
Do replacement windows in a Claremont historic district need approval?
Often a staff review, not a hearing, when they match. On a listed property or district contributor, replacing windows with the same material, form, color and muntin pattern needs only staff review, and so does replacing incompatible earlier units with compatible ones. Different styles can go to the Architectural and Preservation Commission, so send photos to Planning first.
Is there a tax credit for replacement windows?
Not for windows installed after 2025. The IRS says the federal energy efficient home improvement credit, section 25C, is not allowed for property placed in service after December 31, 2025, although many web pages still advertise it. We found no verified Claremont or utility window rebate, so ask your utility and the state before counting on one.
Do I need lead-safe work to replace windows in an older house?
Yes if the house was built before 1978. EPA's rule covers window replacement regardless of size when a firm is paid to disturb paint, and the contractor must be certified. About 75.1 percent of Claremont homes were built before 1980, a proxy for the 1978 cutoff and not an exact count, so ask for the certification number before work starts.
Tell us about your Claremont windows
Tell us the neighborhood, the house's approximate age, the window material you have now, how many windows are involved and whether the house is near the foothills or a historic district, and we will plan the measuring visit around those answers.