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Window Installation · Los Angeles

Light, views,
and lasting quality.

Replacement windows and custom installations using energy-efficient glass that upgrades comfort, cuts bills, and elevates every room.

What We Do

Windows built for
the long term.

Old, drafty windows are one of the most impactful — and often overlooked — sources of energy loss in LA homes. Avanti Construction Group installs replacement windows that immediately improve comfort, reduce outside noise, and lower heating and cooling bills year-round.

We source from trusted manufacturers and offer a range of frame materials, glass packages, and operating styles — all custom-sized to your existing openings so installation is clean, precise, and finishes beautifully inside and out.

Window replacement can also qualify for California utility rebates and federal energy efficiency tax credits, making it one of the fastest-payback upgrades a homeowner can make.

Window installation

What's Included

Our window
services.

🪟
Replacement Windows

Full window replacement in any style — single-hung, double-hung, casement, slider, and picture windows — precisely fitted to your openings.

🌡️
Energy-Efficient Glass

Low-E dual-pane and triple-pane glass packages that block UV, reduce heat transfer, and keep rooms comfortable year-round.

📏
Custom Sizing

Every window is measured and ordered to fit your exact opening — no compromises, no visible gaps, a finish that looks like it was always there.

🔨
Professional Installation

Clean, code-compliant installation with proper flashing, sealing, and interior trim — protecting against water intrusion and air leakage.

Why Choose Us

The Avanti
difference.

🏛️

Licensed & Insured

Window installation involves structural openings and waterproofing. Our CSLB General Contractor license (#1117924) ensures every install is done correctly and covered.

💰

Transparent Pricing

Clear per-window pricing with no hidden fees for trim work or cleanup. We show you the full scope before ordering a single unit.

"Competitive pricing with no surprises or hidden charges. Professional and efficient."— Lucas Simmons
👤

Roman's Personal Involvement

Roman reviews product selections with each client to make sure the window style, glass package, and frame finish are exactly right for their home.

"Roman came personally to review the design ideas with me and made sure everything matched what I envisioned."— Marcus W.

Ready to transform your home?

Let's start with a conversation. No pressure, just possibilities.

Call (310) 878-0700 Get a Free Quote
Written by

Roman Leonelli

Founder & General Contractor · Avanti Construction Group · CSLB #1117924

Roman personally oversees every Avanti project in Los Angeles from first design consultation through final walkthrough. This content reflects his direct experience on active jobsites across LA County — not generic marketing copy.

Read Roman's full bio →

Frequently Asked

Real answers from Roman.

How much does window replacement cost?

Mid-range vinyl windows in LA typically run $600–$1,200 per window installed. Higher-end wood-clad, fiberglass, or impact-rated windows are $1,500–$3,500+. A full-house replacement (15–20 windows) typically totals $15,000–$50,000.

How long does window installation take?

Most single-window replacements take 1–2 hours. A full-house replacement is usually completed in 2 to 5 days.

What windows are best for LA's climate?

Dual-pane low-E is the standard for LA — sufficient energy performance without the cost of triple-pane (which you don't need in a mild climate). Impact-rated glass is worth considering for high-noise areas (near freeways or flight paths).

Do I need permits for window replacement?

Yes, in most cases. LA requires permits for window replacements when the rough opening changes. Like-for-like replacements typically need permits but inspections are simpler.

Are energy-efficient windows worth it?

For LA homes, the energy savings alone typically pay back over 10–15 years. The bigger benefits are comfort (reduced drafts, UV protection) and noise reduction. Title 24 often requires energy-efficient windows for remodels anyway.