What does an LA window replacement cost?

Most LA full-frame window replacements land $900–$2,200 per opening installed. Folding-glass-wall systems run $1,500–$3,000+ per linear foot.

Do I need a permit to replace windows?

Like-for-like vinyl retrofit usually doesn't, but full-frame replacements, header changes, and any structural opening changes do. We pull permits when required.

Can you install a folding-glass wall?

Yes — we install NanaWall, LaCantina, and Western Window Systems folding and sliding wall systems with proper structural header, drainage track, and finish detail.

How long does a whole-house LA window replacement take?

Most single-family full-frame replacements run 5–10 working days on site after material delivery. Lead times on custom or folding-glass systems can add 8–16 weeks.

What does Title 24 require for window replacements?

All replacement glazing in LA must meet Title 24 maximum U-factor and SHGC. We specify NFRC-labeled product and submit the certificate at permit closeout.

Desk 02 · Los Angeles · Windows & doors

Los Angeles Window & Door Replacement Contractor. the openings that change the room.

Replacing windows and doors in LA is rarely just a swap. It's a Title 24 conversation, often a structural-header conversation, and always a flashing-and-WRB conversation. We replace, retrofit, and build new openings across LA County with proper head flashing, sill pan, and integrated weather-resistive barrier laps.

Licensed California contractor · CSLB #1156772 · Los Angeles desk · LADBS

Begin a Los Angeles windows & doors brief →← Back to Los Angeles desk

We install dual-pane vinyl, fiberglass, and aluminum systems — plus folding-glass wall systems (NanaWall, LaCantina, Western) when an LA homeowner wants the indoor-outdoor edge to fully disappear.

Los Angeles permit notes · Windows & Doors

What we resolve before drawings begin.

01
Title 24 U-factor + SHGC
All LA replacements must meet Title 24 U-factor and SHGC targets. We specify NFRC-certified product and document for permit closeout.
02
Header and shear when enlarging openings
Cutting an opening larger than existing triggers a structural header + lateral bracing recalc. We commission the engineer at feasibility.
03
Flashing + WRB integration
Proper sill pan, head flashing, and WRB lap detail. This is how a window installation either lasts 30 years or starts leaking at year four.

Windows & doors · brand-by-brand reality check · Los Angeles spec

The cheapest window in California costs more than the most expensive window — because non-compliant U-factor kills your Title 24 envelope budget and forces wall-insulation upgrades elsewhere.

Andersen, Marvin, Pella, and Milgard cover 80%+ of the architect-spec'd US market.
California Title 24 sets U-factor and SHGC limits by climate zone. Most LA replacement windows must hit U ≤ 0.30 and SHGC ≤ 0.23.

The manufacturers we actually specify.

7 brands · ordered by frequency on jobs

Marvin
premium
Warroad, MN
Wood-clad and Essential fiberglass · Signature lines for additions
Aluminum-clad exterior over real wood interior — the right window for historic LA homes where you want true wood inside without exterior maintenance.
Ultrex pultruded fiberglass · Lifetime limited warranty
Andersen
premium
Bayport, MN · founded 1903
400-series (Perma-Shield) and A-series · most-spec'd in upper-mid remodels
100 Series Fibrex (reclaimed wood fiber composite) hits a price/performance sweet spot for full-house replacement on Craftsman homes.
20-year glass · 10-year non-glass
Pella
workhorse
Pella, IA
Lifestyle, Architect, Reserve lines + Hurricane Shield
Strong on between-glass blinds (good in second-story bedrooms facing the street) and impressive operating hardware feel.
Limited lifetime warranty on wood/clad
Milgard
workhorse
Tacoma, WA · MITER Brands
Tuscany, Trinsic, Style Line · the LA mid-market workhorse
Vinyl and fiberglass with a transferable Full Lifetime warranty including labor on glass and parts — meaningful when you're selling within 7 years.
Full Lifetime warranty including parts & labor
Jeld-Wen
value
Charlotte, NC
Premium Vinyl + Siteline EX clad-wood
Most cost-effective Energy Star compliant option for spec-grade or rental ADU work without sacrificing CA Title 24 numbers.
Western Window Systems
specialty
Phoenix, AZ
Aluminum multi-slide and bi-fold patio systems
When the brief is 'open the wall to the yard,' nothing else specs cleanly for 16–24 ft openings with thermally broken aluminum that meets Title 24.
LaCantina
specialty
Oceanside, CA
Folding & sliding patio doors made in CA
California-made; shorter lead times for SoCal jobs vs. East-coast competitors.

Material tiers · what you're actually choosing between.

CA installed pricing · 2025

Material	Lifespan	Installed in CA	Best for	Trade-offs
Vinyl	20–30 years	$650–$1,100 per opening	Rental ADUs, garage conversions, like-for-like replacement.	Color is the chemistry — can't be re-painted reliably. Avoid dark vinyl on west elevations.
Fiberglass (Marvin Essential, Milgard Ultra)	30–50 years	$900–$1,600 per opening	Owner-occupied homes that want longevity without wood maintenance.	Heavier; verify framing/jamb depth before order.
Aluminum-clad wood (Marvin Signature, Andersen A-Series)	40–60 years	$1,500–$3,500 per opening	Architectural specifications where interior species (mahogany, oak) is a feature.	10–14 week lead time on custom sizing.
Thermally-broken aluminum (Western, Fleetwood)	40–60 years	$2,000–$5,000 per opening	Modern minimalism, large openings, multi-slides.	Hits Title 24 only with high-performance glass packages — confirm calc before order.

Specification gotchas we resolve before contract.

01
Egress vs. fixed — bedrooms aren't optional.
Every sleeping room needs a window with ≥ 5.7 sf clear opening, ≥ 20 in wide and ≥ 24 in tall, sill ≤ 44 in. We size to egress before we size to aesthetics.
02
Title 24 U-factor stack.
Replacing > 50 ft² of glazing triggers compliance docs. We pull NFRC labels at install (not just delivery) — the inspector wants to see them on the glass.
03
Pan flashing under sills.
We install a sloped sub-sill flashing pan (Vycor or formed-metal) on every window. Without it, the wall behind a leaking weep can rot before anyone notices.

Sources · NFRC Certified Products Directory · CA Title 24 — Residential prescriptive U-factor table

Other Los Angeles services.

All Los Angeles services →

Los Angeles city directory · 314 cities served

Windows & Doors, written for your city.

Each link opens a dedicated page calibrated to the city's permit authority, lot conditions, and price band — not a generic regional landing.

Los Angeles · Windows & Doors FAQ

Questions Los Angeles homeowners ask first.

Start an LA window or door brief. We'll review Title 24, structural feasibility, finish detail, and a fixed-scope contract.

What does an LA window replacement cost?
Most LA full-frame window replacements land $900–$2,200 per opening installed. Folding-glass-wall systems run $1,500–$3,000+ per linear foot.
LA cost anatomy →
Do I need a permit to replace windows?
Like-for-like vinyl retrofit usually doesn't, but full-frame replacements, header changes, and any structural opening changes do. We pull permits when required.
LA permitting rules →
Can you install a folding-glass wall?
Yes — we install NanaWall, LaCantina, and Western Window Systems folding and sliding wall systems with proper structural header, drainage track, and finish detail.
How long does a whole-house LA window replacement take?
Most single-family full-frame replacements run 5–10 working days on site after material delivery. Lead times on custom or folding-glass systems can add 8–16 weeks.
LA permit timeline →
What does Title 24 require for window replacements?
All replacement glazing in LA must meet Title 24 maximum U-factor and SHGC. We specify NFRC-labeled product and submit the certificate at permit closeout.
Title 24 compliance →

Begin

Begin your projectin twenty minutes.

A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.

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About Windows & Doors in Los Angeles

What we resolve before drawings begin.

Title 24 U-factor + SHGC

Header and shear when enlarging openings

Flashing + WRB integration

The cheapest window in California costs more than the most expensive window — because non-compliant U-factor kills your Title 24 envelope budget and forces wall-insulation upgrades elsewhere.

Marvin

Andersen

Pella

Milgard

Jeld-Wen

Western Window Systems

LaCantina

Egress vs. fixed — bedrooms aren't optional.

Title 24 U-factor stack.

Pan flashing under sills.

Other Los Angeles services.

Windows & Doors, written for your city.

Questions Los Angeles homeowners ask first.

Begin your projectin twenty minutes.

Windows Doors in Los Angeles. Tell us the parcel.