KSP Construction LLC phone (203) 990-3599
Restored Historic Steel Windows
SERVING NYC, WESTCHESTER, AND CONNECTICUT

STEEL WINDOW
RESTORATION

We provide professional steel window restoration and repair for historic, landmark, residential, and institutional properties, including frame and casement repairs, rust treatment, welding, hardware restoration, reglazing, sealing, and repainting.

Our work follows a preservation-focused approach with coordination alongside architects and projects subject to Landmarks Preservation Commission (LPC) review.

If full restoration is not feasible, we also offer custom steel window replacement, designed to preserve your building’s historic character while meeting modern performance standards.

Request an Estimate

verified_user

Secure & Encrypted Transmission

Our Restoration Process

Step 01

Evaluation & Removal

We perform a free on-site assessment of your windows to check for corrosion and structural issues. If restoration is required, windows are carefully removed, and openings are temporarily protected for safety and weatherproofing.

If full restoration isn’t possible, we offer historic window replacement to preserve your building’s character.

Step 02

Delivery to Our Workshop

Windows are safely transported to our specialized restoration facility in New Haven, CT, ready for restoration.

Step 03

Restoration

Complete hardware repairs, rust removal, frame fixes, and thermal upgrades for durability, functionality, and energy efficiency, while preserving the original historic character.

Step 04

Testing & Quality

Restored windows are tested for airtightness and watertightness, ensuring they meet strict performance and quality standards.

Step 05

Delivery & Installation

Windows are carefully packed, delivered, and professionally installed. Openings are prepped, weatherproofed, and aligned for proper operation.

Step 06

Enjoy!

Historic charm preserved, fully functional, energy-efficient, and ready to enhance your building.

Our Work

Historic Landmark Steel Window
Historic Landmark Steel Window Detail

Yale University — Woolsey Hall

Steel window restoration of selected historic windows

(Project reference. Scope limited to specific window assemblies, not full building restoration.)

Stained Steel Window Restored
Steel Window Restored Exterior
Workshop Restoration Table
Clearing Steel Window
Restored Vertical Window
Restoration Process
Workshop Restoration
Restoration Project Image
Work In Progress

Testimonials

Client Review 1
Client Review 2
Client Review 3

FINANCING OPTIONS

Contact us to discuss eligibility and terms.

percent

0% APR

No interest up to 12 months

payments

Up to $250,000

Available for qualifying projects

calendar_today

2–12 Year Terms

Based on eligibility

Ready to Restore Your Steel Windows?

Expert Consultation & Repair Services

phone Call Now

Request Project Consultation

verified_user

Secure & Encrypted Transmission

phone