Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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Before
AfterHow Much Does New Window Installation Cost in Los Angeles?
New window installation in Los Angeles typically costs $5,310 to $17,700 for a standard whole-home replacement project, with impact-rated windows running $9,440 to $29,500 depending on frame material, glass package, and unit count. Most single-family homes in Los Angeles land somewhere in the middle of those ranges - around $8,000 to $14,000 for six to ten windows installed - though the number shifts quickly based on the factors below.
New Window Installation Cost Breakdown (2026)
The table below reflects what Rowan Construction Group quotes on real projects in Los Angeles. Every figure is a flat written price delivered before any work begins - no “call for a quote” here, because a number you can screenshot is the only number worth having.
| Window Type / Project | Los Angeles Price Range (2026) | Notes |
|---|---|---|
| Standard Window Replacement (per project) | $5,310 - $17,700 | Vinyl or aluminum frames, 6-12 units, single-story |
| Impact Window Installation (per project) | $9,440 - $29,500 | Laminated safety glass, reinforced frames, HOA-common in hillside neighborhoods |
| Single Double-Hung Window (supply + install) | $590 - $1,475 | Vinyl frame, Low-E glass, standard rough opening |
| Casement Window (supply + install) | $710 - $1,890 | Common in mid-century modern homes in Silver Lake and Los Feliz |
| Sliding Glass Window (supply + install) | $650 - $1,650 | Popular in ranch-style homes across the San Fernando Valley |
| Picture / Fixed Window (supply + install) | $500 - $1,300 | No moving parts; common as accent units in open-plan living areas |
| Bay or Bow Window (supply + install) | $1,650 - $4,720 | Structural framing often required; adds square footage to interior perception |
| Egress Window Cut-In (supply + install) | $1,180 - $3,540 | Requires permit in Los Angeles; framing and stucco patching included |
| Full-House Window Package (10-15 units) | $9,000 - $22,000 | Volume pricing; depends on frame material and glass specification |
What’s Included in a Rowan Window Installation Quote
A written quote from Rowan Construction Group covers window supply from vetted manufacturers, removal and legal disposal of existing units, installation with proper flashing and weather sealing, interior and exterior trim work, LADBS permit fees where required, and a documented photo record of every stage. Under Clause 1 of The Haven Standard, the price you see is the price you pay - if scope changes, you sign a change order before a single additional dollar is spent.
What Pushes the Number Higher
Frame material is the biggest lever. Vinyl frames sit at the low end of the cost range and perform well in Los Angeles’s climate. Fiberglass frames cost 20 to 40 percent more per unit but handle the thermal cycling you see in inland neighborhoods like Chatsworth and Granada Hills, where summer temperatures routinely hit triple digits. Wood-clad frames add another 30 to 50 percent over fiberglass and are common in historic Craftsman and Spanish Colonial homes in Hancock Park and Leimert Park, where HOA guidelines or Mills Act agreements specify the exterior appearance.
Glass specification adds cost in a non-linear way. A standard double-pane Low-E coating runs $30 to $80 per unit over clear glass. Triple-pane glass adds $100 to $200 per unit and makes the most sense for homes directly under LAX flight paths in Westchester and Inglewood, where exterior noise reduction is the actual goal. Tempered or laminated safety glass is required by Los Angeles Building Code in windows within 18 inches of a floor, within 24 inches of a door, or in bathrooms. Specifying impact-rated laminated glass across all units is the reason impact window projects land at $9,440 to $29,500 rather than the standard replacement range.
What Affects New Window Installation Pricing in Los Angeles
- Frame material: Vinyl is the most cost-effective option and handles Los Angeles’s mild coastal climate without warping. Fiberglass and wood frames cost more upfront but are often required by HOA covenants in neighborhoods like Brentwood, San Marino, and Hancock Park, and they hold their finish longer in the UV-heavy inland zones.
- Glass package and performance spec: Standard Low-E double-pane glass is code-minimum for new residential construction in California under Title 24 energy standards. Upgrading to triple-pane or acoustic-laminated glass adds cost per unit but reduces HVAC load noticeably in east-facing rooms that absorb morning sun in the San Gabriel Valley.
- Window style and operability: Fixed picture windows are the least expensive to install because they have no hardware or weatherstripping to set. Casement, awning, and tilt-turn windows cost more because the sash and operator mechanism require careful adjustment. Bay and bow configurations cost the most because the rough opening typically needs framing modification.
- Rough opening condition and size changes: Replacing a window in an existing rough opening that is already the right size is straightforward. Enlarging or relocating an opening requires framing, stucco repair, and an LADBS permit - adding $800 to $2,500 in labor and material depending on whether the wall is load-bearing. In older Los Angeles homes built before 1960, stucco exteriors often have two or three repair layers that require matching on patch work.
- Story height and access: Ground-floor installations are baseline. Second-story windows require staging or tall ladders, adding $75 to $150 per unit in labor. Hillside homes in Silver Lake, Echo Park, or the Hollywood Hills with steep lot grades often need specialty staging that can push per-unit labor higher, because a second-floor window on the downhill face of a hillside home may be the equivalent of a third-floor window on flat ground.
- Permit requirements: The Los Angeles Department of Building and Safety requires permits for new window openings and for any change to window size or location. Like-for-like replacements in the same rough opening typically qualify for a simplified permit, while new openings or structural changes require a full plan check. Permit fees in Los Angeles run $200 to $700 for window work depending on project valuation. Rowan includes permit coordination in the written scope - the fee is itemized in the quote, not absorbed into overhead or billed as a surprise at the end.
- Unit count and volume: A single window replacement costs more per unit than a ten-window project. Setup, staging, and inspection fees are largely fixed costs spread across fewer units on small jobs. Bundling all windows into one project is the most reliable way to reduce the per-unit installed cost in Los Angeles.
Before
AfterLos Angeles-Specific Factors You Won’t Read on a Generic Cost Guide
Most pricing guides are written for a national average that doesn’t exist anywhere. Los Angeles has conditions that move the number in specific directions, and they’re worth naming.
Title 24 Energy Compliance
California’s Title 24 Building Energy Efficiency Standards set minimum U-factor and Solar Heat Gain Coefficient (SHGC) requirements for replacement windows. In Los Angeles’s climate zone (primarily Climate Zone 9), the standard calls for a maximum U-factor of 0.30 and a maximum SHGC of 0.23 for most residential applications. Windows that don’t meet these specs fail inspection. Every window Rowan specifies is pre-screened against Title 24 requirements before it appears in a quote - this is not a step that happens after the customer approves the product.
Seismic Considerations
Los Angeles sits on active fault systems, and the building code reflects it. Windows larger than certain dimensions, particularly in non-engineered wood-frame walls, may require shear panel upgrades alongside the window installation to maintain the wall’s lateral resistance. This is not common on standard single-window replacements, but it comes up on egress window cut-ins and large picture window installations in pre-1980 homes in neighborhoods like Mid-Wilshire and West Adams. When it does come up, a signed change order documents the additional scope before the framing crew does the work.
HOA Covenants in Los Angeles Neighborhoods
Significant portions of Los Angeles fall under HOA jurisdiction. Many HOAs in communities like Toluca Lake, Cheviot Hills, and Pacific Palisades specify frame color, exterior finish, and grid pattern for windows visible from the street. Selecting a window product that doesn’t match the HOA’s approved list requires an architectural review board submission before installation begins. Rowan’s project coordinator handles that documentation as part of the pre-installation phase, because discovering the mismatch after the window is ordered adds weeks and costs.
Coastal Zone and Salt Exposure
Homes within a mile or two of the coast in Santa Monica, Marina del Rey, Playa del Rey, and Venice face salt-laden marine air that accelerates corrosion on aluminum frames and hardware. In those locations, Rowan typically recommends anodized aluminum or fiberglass frames rather than standard painted aluminum, and specifies stainless-steel fasteners and hardware throughout. The material cost difference is $50 to $150 per unit, and it’s the reason a window installed in Venice can outlast the same window installed with standard hardware by a decade or more.
How to Save on New Window Installation in Los Angeles
Bundle All Windows Into One Project
The single most effective cost-reduction strategy is doing all your windows at once. Permit fees, staging setup, inspection scheduling, and crew mobilization are fixed costs. Spreading them across ten units instead of two cuts the per-unit overhead significantly. Homeowners who replace windows in phases because they feel it’s “too expensive to do all at once” usually spend more over three years than they would have in one project.
Stick to Standard Rough Opening Sizes
Windows manufactured to standard dimensions (common series from brands like Milgard, Simonton, and Pella) cost less than custom-sized units and are available faster. If your existing rough openings accept a standard window size, the installation is faster and the material cost is lower. The time to change the size of an opening is when you have a reason beyond the window itself – an egress requirement, a view line, a remodel that opens the wall anyway.
Specify the Glass, Not Just the Frame
Many homeowners over-specify the frame and under-specify the glass. A fiberglass frame with standard clear glass performs worse than a vinyl frame with a proper Low-E coating and argon fill. The glass package – Low-E coating, gas fill, number of panes – drives energy performance and noise reduction more than frame material alone. Understanding this lets you allocate budget where it has the most effect.
Bring Your Current Estimate for a Free Second Opinion
Rowan offers a free line-by-line review of any written window installation estimate. If you’ve received a quote from another Los Angeles contractor, bring it in. The review is free, and it either confirms the quote is fair or it shows you where the number is padded or where scope is missing. Call (213) 652-7670 to schedule that review – it takes about thirty minutes and costs nothing.
Ask About California’s Window Rebate Programs
The California Energy Commission and some Southern California utilities periodically offer rebates on qualifying ENERGY STAR-certified windows. Eligibility depends on the specific product’s performance ratings and the utility territory. These programs open and close, so it’s worth checking the current status at the time of your project. Rowan’s written quotes note whether the specified products qualify under current program rules – the customer shouldn’t have to chase that information separately.
Time the Project Right
Late fall through early winter – roughly October through January – is historically a lower-demand period for window installation in Los Angeles. Contractor schedules are looser, material lead times are shorter, and some suppliers offer end-of-year pricing on window packages. The climate in Los Angeles makes year-round installation practical, so there’s no weather-based reason to wait until spring.
Choosing Window Materials for the Los Angeles Climate
Vinyl
Vinyl frames are the dominant choice in Los Angeles for a reason. They don’t conduct heat as readily as aluminum, they don’t rot, and they hold their color without painting. In the coastal marine layer zones of West Los Angeles and the South Bay, vinyl doesn’t corrode. The trade-off is that vinyl expands and contracts more than fiberglass, which can cause seal failure over time in east-facing and south-facing installations in inland areas like the San Fernando Valley and the Inland Empire edge where temperatures swing more dramatically. For most Los Angeles homes, vinyl is the right call at the right price.
Fiberglass
Fiberglass frames cost more – roughly 20 to 40 percent above comparable vinyl – but they expand and contract at nearly the same rate as glass, which means the seal between frame and glass stays intact longer. In Granada Hills and Chatsworth, where summer heat regularly exceeds 100 degrees Fahrenheit, fiberglass frames hold their tolerances better across decades. For historic homes where the look of painted wood is required but maintenance is a concern, fiberglass clad in a wood interior finish is a practical middle ground.
Aluminum
Aluminum frames are thin-profiled and strong, which is why they remain popular in mid-century modern homes in Los Feliz, Silver Lake, and West Hollywood where narrow sight lines are part of the architectural character. The drawback is thermal conductivity – aluminum transfers heat readily, which works against energy efficiency. Thermally broken aluminum frames (frames with a non-conductive barrier between the interior and exterior sections) address this, but they cost more than standard aluminum and close the gap with fiberglass pricing. Standard aluminum is not recommended for coastal-adjacent installations without protective anodizing.
Wood and Wood-Clad
Solid wood windows are still specified in restoration work on Craftsman bungalows in Pasadena, Highland Park, and Leimert Park, and in Spanish Colonial homes in Hancock Park where the HOA or the homeowner’s own standards require authentic materials. Wood requires periodic painting and is vulnerable to moisture damage in poorly detailed installations. Wood-clad windows – fiberglass or aluminum exterior over a wood interior – reduce exterior maintenance while preserving the interior appearance. They cost more than all-vinyl and all-aluminum options, and the written quote will say so clearly.
The Los Angeles Window Installation Process, Step by Step
Knowing what happens on-site makes it easier to plan around the crew and understand what you’re paying for.
- Measurement and scope: Before ordering any material, Rowan measures every rough opening. Windows are not standard-sized in practice – openings in pre-1960 homes in Los Angeles can be off by an inch in multiple directions. Getting this step right prevents the most common and expensive window installation mistake.
- Written quote and scope delivery: The flat written price, itemized by unit and labor type, is delivered before anything is ordered. Under The Haven Standard, no work begins until this document is signed by the customer.
- Permit application: For projects requiring a permit under LADBS rules, Rowan files the application and coordinates the plan check. Permit timelines in Los Angeles run two to six weeks for residential window work; the project schedule accounts for this from day one.
- Material order and lead time: Standard window series from Milgard, Simonton, and Pella typically carry a two to four week lead time from Los Angeles-area distributors. Custom sizes run four to eight weeks. The project schedule is built around the actual lead time, not an optimistic estimate.
- Installation: The crew removes existing windows, inspects the rough opening framing and sill for rot or pest damage (photographed and documented), installs the window with proper flashing tape and weather seal, and completes interior and exterior trim. Each installed unit is photographed before and after. If framing damage is found that changes the scope, a change order is written on-site before the work proceeds.
- Inspection: LADBS inspection is scheduled and completed before the crew demobilizes. The permit card is closed out and the customer receives a copy.
- Final walkthrough and documentation: The customer walks the completed work with the crew lead. The photo record, signed permit, and written warranty are delivered at this point – not mailed later.
FAQs: New Window Installation Cost in Los Angeles
How much does window installation cost per window in Los Angeles?
A single double-hung or sliding window installed in an existing rough opening in Los Angeles typically costs $590 to $1,475 for a vinyl unit with Low-E glass. Casement windows run $710 to $1,890 per unit installed. Impact-rated laminated windows cost more – $940 to $2,950 per unit depending on size and glass specification. These are all-in numbers covering supply, installation, and standard trim work. They don’t include permit fees for projects requiring a permit, which are itemized separately in the written quote. Call (213) 652-7670 for an exact number on your specific units.
Is it cheaper to replace all windows at once or one at a time in Los Angeles?
Replacing all windows in a single project is cheaper per unit. Permit fees, staging setup, and inspection costs are largely fixed regardless of how many windows are on the project. On a ten-window project, those fixed costs might add $150 to $250 per unit. On a two-window project, the same fixed costs add $400 to $600 per unit. Homeowners in Los Angeles who replace windows one at a time typically spend 25 to 40 percent more per window over the life of the phased approach than they would have spent doing the whole house at once.
Do I need a permit to replace windows in Los Angeles?
Like-for-like replacements in the same rough opening – same size, same location – qualify for a simplified permit process through LADBS. Any change to rough opening size or location, any new window cut into an existing wall, or any structural modification requires a full permit with plan check. Permit fees for residential window work in Los Angeles run $200 to $700 depending on project valuation. Rowan handles permit filing and inspection coordination as part of the written scope, not as a separate billing line.
How long does new window installation take in Los Angeles?
An experienced crew can install six to ten windows in one to two days on a straightforward single-story project. The installation itself is fast. What takes time is the front-end work: measurement, ordering, permit processing (two to six weeks through LADBS), and material lead time (two to four weeks for standard windows). From the day you sign the quote to the day the windows pass inspection, plan for four to eight weeks on a permitted project in Los Angeles.
What is the difference between window replacement and new window installation in Los Angeles?
Window replacement (also called a “pocket replacement” or “insert replacement”) fits a new window unit into an existing rough opening without disturbing the surrounding wall, framing, or exterior cladding. It’s faster and less expensive because the opening doesn’t change. New window installation – cutting a new opening in an existing wall – requires framing, structural review in some cases, exterior stucco or siding patching, and an LADBS permit. Costs for new installations run higher: $1,180 to $3,540 per new opening including framing, flashing, and exterior finish, before the window unit cost. The written quote will specify which scope applies to each unit in your project.
What brands of windows does Rowan Construction Group install in Los Angeles?
Rowan sources windows from a vetted list of manufacturers including Milgard, Simonton, Pella, and Andersen, selected based on the project’s performance requirements, aesthetic goals, and budget range. The choice of brand and product series is recommended in the written quote with a specific reason – not just a product name. If your HOA or architect has specified a particular product, Rowan can quote to that specification and confirm whether it meets California’s Title 24 requirements before anything is ordered.
Why the Written Price Matters More Than the Lowest Bid
Window installation quotes in Los Angeles vary by thousands of dollars on identical scopes. The most common reasons: the low bid excludes permit fees, excludes interior trim, uses a product that doesn’t meet Title 24, or prices the job as a pocket replacement when the opening actually needs structural work. A written price with a written scope eliminates each of these variables before any money changes hands.
Rowan has delivered more than 4,000 projects in this market since 2007, every one with a written price before work started and a documented photo record when the crew left. The 365-Day Done Right Promise means that if the work is not right within a year of completion, Rowan makes it right – and that promise is printed in full on the warranty document the customer receives at final walkthrough, not buried in an asterisk.
If you’re reviewing another contractor’s quote and want a second set of eyes on it, the Free Second Opinion is a standing offer. Bring the written estimate and Rowan will review it line by line at no charge. A New Window Installation in Los Angeles project that starts with a fair, complete, written scope is the one that finishes close to the number you agreed to.
For more on what Rowan Construction Group offers across all seven residential trades, visit our home page.
Get a Written Window Installation Quote in Los Angeles
Rowan Construction Group serves homeowners across Los Angeles – from single window replacements in Silver Lake to full-house impact window installations in Pacific Palisades. Every project starts with a free, written, flat-price estimate. No vague ranges. No “call for a quote.” A number you can compare and a scope you can hold us to.
Call (213) 652-7670 to schedule your free estimate. A live person answers. The estimate is free. The price is in writing before anyone picks up a tool.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Los Angeles since 2007.
Pricing reflects the Los Angeles market as of 2026. Rowan Construction Group Los Angeles offers free estimates – call (213) 652-7670.
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