Professional Window Installation
A clear, careful process—measured, sealed, and finished to manufacturer and code standards.
Even the best window won't perform if it's installed poorly. Professional installation protects your warranty, ensures weathertight performance, and is required by most manufacturer warranties.
All installations are performed by the properly licensed contractor identified in your written proposal—not by Replacement Windows Online directly.
1. Free consultation
We visit, measure, inspect frames, and discuss your goals—no pressure.
2. Product selection
Compare materials, styles, glass, and brands that fit your budget.
3. Custom proposal
A written estimate with products, pricing, timeline, and warranty.
4. Scheduling
We coordinate a convenient install date and confirm permit needs.
5. Installation
A licensed contractor installs to manufacturer and code standards.
6. Final walkthrough
We test operation, clean up, and review warranty and care.
Buying your own replacement windows?
If you plan to purchase your own windows, our illustrated how to measure windows guide shows you exactly how to measure your openings — width, height, diagonals, and frame depth — and includes a printable worksheet. Text your photos and measurements to 626-313-9236 for a labor-only installation estimate.
Get your free, no-pressure window estimate
Mobile consultation throughout Orange County and nearby Southern California communities.