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Steel Window Replacement in Los Angeles New Thermally Broken Steel and Steel-Look Windows
New steel windows cost $700 to $2,000 each, per Angi, based on size and glass. Old steel casements from the 1920s to 1940s can be repaired, rebuilt in new steel or swapped for steel-look aluminum or fiberglass. PaneRight LA connects you with independent local contractors who handle steel window replacement across Los Angeles, from Spanish homes in Beverly Hills to modernist homes in Silver Lake.
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Are Your Old Steel Windows Beyond Repair?
Many aren’t. The National Park Service’s Preservation Brief 13 treats rust as a range, from surface rust you can clean and coat to section loss that needs welding or new steel. Replace when frames have rusted through, bent out of square or no longer close. If the frames are still sound, our guide to steel casement window restoration explains how they can be repaired instead.
01
Why Do Old Steel Windows Drip With Condensation and Grow Mold?
Solid steel frames and single-pane glass have no insulation. On cool mornings, the metal drops below the dew point, and moisture from showers and cooking beads up and runs onto the sill. That wet sill feeds mildew and keeps the steel rusting.
02
Why Does the Glass Keep Cracking in Your Steel Frames?
Rust takes up more space than the steel it came from. When it forms in the pocket that holds the glass, it pushes on the pane until the glass cracks. Hard old putty and bent frames add stress, so new glass cracks again unless the rust is fixed first.
03
Are Rusted Frames and Seized Hinges Keeping Your Casements Shut?
Rust at the hinges and layers of paint lock casements in place. Stuck casements in a bedroom are a safety problem, since you need them to open in a fire. Hinges and operators can be freed or replaced if the frame is still sound; see our steel casement window restoration service.
What’s Included in Our Steel Window Replacement Service?
Every job covers a frame condition check, measuring, windows made to order, removal, steel window installation, sealing, the permit and haul-away.
01
Can You Replace Old Steel Casements With New Steel?
Yes. New hot-rolled steel casements come with thermal breaks, dual-pane low-E glass and matching muntins. Torrance Steel Window Company in Torrance has made custom hot-rolled steel windows since 1962, and national makers like Hope’s build them too.
02
Can Aluminum or Fiberglass Windows Copy the Slim Steel Look?
Yes. Slim aluminum frames in matte black copy steel lines for less money. Marvin says its high-density fiberglass mimics the clean look of aluminum and steel with better insulation. Both are wider than true steel, so ask to see a corner sample.
03
Can You Keep Leaded or Art Deco Glass in a New Frame?
Yes. Contractors can set an original leaded or art glass panel into the new frame, or mount it inside a new dual-pane window as a second layer. Cracked art glass goes to a stained glass studio for repair first.
How Much Does Steel Window Replacement Cost in Los Angeles?
Angi puts steel windows at $700 to $2,000 each. Large window walls, French doors and custom true divided lites cost more, and fabrication lead time adds weeks.
| Option | Price per window (Angi) |
|---|---|
| New steel window | $700 to $2,000 |
| Aluminum window | $125 to $1,000 |
| Steel basement window, prefab | $275 to $800 |
| Steel basement window, custom | $350 to $1,200 |
Why Do New Steel Windows Cost So Much More Than Aluminum?
Each steel window is cut, welded and finished by hand to your opening. Coastal finishes add hot-dip galvanizing and several coats. Aluminum is extruded in long runs, so it costs far less per window.
How Can You Lower the Cost of a Steel Window Project?
Repair the windows that can be saved and replace only the failed ones. Use new steel on street-facing walls and steel-look aluminum at the back. Replacing steel frame basement windows or small fixed lites with standard sizes costs less than custom casements.
New Steel, Steel-Look Aluminum or Fiberglass: Which Replacement Fits Your Home?
| New steel | Steel-look aluminum | Fiberglass | |
|---|---|---|---|
| Sightlines | Slimmest | Close | Wider |
| Cost | Highest | Lowest | Middle |
| Historic match | Best | Fair | Fair |
| Upkeep | Touch up coatings | Low | Low |
Choose new steel for HPOZ homes and true period detail. Aluminium steel replacement windows, meaning aluminum styled to look like steel, suit budget jobs and modern homes; see aluminum window replacement. Replacing steel windows with aluminium also cuts weight on big openings.
Do New Steel Windows Need a Thermal Break in Los Angeles?
Yes, for homes you heat and cool. A thermal break is an insulating strip between the inside and outside steel, so heat can’t pass straight through the frame. Thermally broken steel windows sweat less, stay cooler in Valley sun and come closer to Title 24 limits.
How Are Old Steel Windows Removed and Replaced, Step by Step?
- Check. Contractors test for rust depth, lead paint and frame damage.
- Measure and quote. A written price for each opening.
- Permit and review. Contractors file the permit and any HPOZ review.
- Remove. Old frames are cut from the wall or plaster with care.
- Install. New windows are set, anchored, flashed and sealed.
- Patch and finish. Contractors repair plaster and stucco and test every casement.
What Should LA Homeowners Know Before Replacing Steel Windows?
01
Can New Steel Windows Meet California’s Title 24 Rules?
Title 24 sets replacement windows at a U-factor of 0.30 or lower and an SHGC of 0.23 or lower. Check the NFRC label on any steel window before you order. If it’s above 0.30, your energy consultant can use Title 24’s performance method, which balances window loss against upgrades elsewhere.
02
Will Your HPOZ Board Approve Replacement Steel Windows?
Only when the new windows match the old ones. HPOZ boards in Hancock Park, Los Feliz and other districts review window changes under each district’s Preservation Plan. Preservation Brief 13 warns that replacement systems can bring wider frames and changed sightlines, so new steel with matching profiles has the best chance. See our historic window restoration service.
03
Do Steel Windows Rust Faster Near the Beach?
Yes. Hope’s builds a coastal finish for steel windows within 1 mile of salt air, with hot-dip galvanizing, an epoxy primer and a top coat. Homes in Santa Monica, Palos Verdes and Long Beach need that kind of finish and a yearly check for chips.
Why Do LA Homeowners Choose PaneRight LA for Steel Windows?
- Repair first. Steel window repair where the frames are sound.
- Real steel sources. Custom hot-rolled steel or steel-look options.
- HPOZ help. Drawings and specs for historic review.
- Itemized quotes. Frame, glass, finish and lead time for every opening.
- Warranty in writing. Ask for a written labor warranty on top of the manufacturer’s warranty.
Where Do Contractors Replace Steel Windows in Los Angeles?
Contractors work across Beverly Hills, Hancock Park, Los Feliz, Silver Lake, Pasadena, Glendale, Santa Monica, Pacific Palisades, the South Bay, and Long Beach. That covers 1920s Spanish estates north of Sunset Boulevard, Art Deco and modernist homes in the hills, and beach homes where salt air eats bare steel.
Steel Window FAQs
Why Did Steel Casement Windows Disappear From Homes?
After World War II, aluminum windows were cheaper to make and never rusted, so builders switched. Steel stayed in custom and commercial work.
Do Steel Windows Save Energy?
Old ones aren’t. Solid steel frames with single-pane glass lose heat and sweat. Thermally broken frames with low-E dual-pane glass close much of that gap.
Is Steel Better Than Wood for Windows?
For slim frames and big glass, yes. Steel won’t rot or swell, but it needs its coating kept up to stop rust. Wood is warmer to the touch and easier to repair; see our wood window replacement page.
How Long Do New Steel Windows Last?
Many LA steel casements from the 1920s and 1930s still work today. New galvanized and coated frames last for decades when chips are touched up and seals are kept tight.
How Do You Find a Contractor for Old Steel Casement Windows?
Look for a crew that does both repair and metal frame window replacement, handles welding and glazing, and has HPOZ jobs to show. Ask for photos, references and the maker of any new metal replacement windows they quote.
Ready to Replace Your Old Steel Windows? Call (424) 230-8336
Call (424) 230-8336 or send photos of your steel windows through the form. Show us any rust, cracked glass or stuck casements, and a local contractor will send a written price for each opening.
PaneRight LA is an advertising and referral service, not a contractor. We connect you with independent local window contractors who may pay us for referrals. Calls may be recorded.