Window Replacement in San Antonio - Written Price Before Anything Is Ordered

Trusted Window Replacement for San Antonio Homeowners

Window replacement in San Antonio typically runs between $450 and $1,400 per opening depending on the frame material, glass package, and whether the existing frame needs repair before the new window goes in. Most single-family homes in neighborhoods like Alamo Heights, Terrell Hills, and Timberwood Park need 8 to 14 windows replaced, which puts a full-home project somewhere between $3,600 and $19,600. We’re Lightwell Windows San Antonio, part of the Cedarwell network since 2010, and every window we install carries our 365-Day Done Right Promise: if the finished work isn’t right, we make it right. Keith Yamada leads our San Antonio team, and a live person answers at (325) 420-4173 whenever you call.

Call (325) 420-4173

This page covers exactly what window replacement costs here, which brands we carry, how the process works, and what to expect when our crew walks through your door. For a detailed breakdown, see our Window Replacement cost guide. If you’d rather talk to a person than read a page, call (325) 420-4173 and Keith or a member of his team will walk you through it.

Energy Efficient Windows

Energy efficient windows are units built with low-E glass coatings, insulated frames, and argon or krypton gas fills between panes to cut heat transfer through the glass. San Antonio summers push attic temperatures past 140 degrees and air conditioners run for months, so a single-pane window swapped for a double-pane low-E unit can drop the solar heat gain in a south-facing room by up to 40 percent. Our most common energy efficient replacement runs $550 to $950 per opening, which includes the new window, frame prep, and haul-away of the old unit. We carry ECO Window Systems and ViewLux among our eight brands, both of which offer high-performance glass packages that meet the 0.25 U-factor and 0.25 SHGC standards recommended for South Texas climate zone 2.

Glass Coatings for the South Texas Sun

Low-E coatings on double-pane glass reflect infrared heat back outside while letting visible light through, which matters a lot in San Antonio where west-facing windows cook rooms from 4 to 8 p.m. We recommend a low-solar-gain coating on the west and south elevations specifically, because that’s where we see the biggest temperature swings in places like Helotes and Castle Hills.

Frame Materials and Heat Transfer

Vinyl and thermally-broken aluminum perform differently in San Antonio’s heat-and-humidity cycle, with vinyl holding up better against thermal expansion when temperatures swing 40 degrees between night and afternoon. We’ll spec the frame based on which direction each window faces, because an east window in Kirby does different thermal work than a west window in Leon Valley.

Window Repair

Window repair is the process of fixing a failing part of an existing window, most often a broken balance, a rotted sash, a fogged glass unit, or a seal that has lost its gas fill. In San Antonio we see two repair calls for every replacement call: homeowners in Terrell Hills and Alamo Heights with wood double-hungs from the 1950s and 1960s, and builders’ grade vinyl windows in newer subdivisions near Lackland AFB that have seals failing after 8 to 12 years. A simple balance or hardware repair runs $120 to $280 per window, while a glass unit replacement inside an existing frame runs $300 to $600 depending on glass size and coating type. Lightwell Windows San Antonio does both repairs and full replacements, so we’ll tell you honestly when a repair stretches the life of a window by five years and when that money is better spent on new glass.

Balance and Hardware Repair

Spiral and block-and-tackle balances wear out on the windows we see most often in San Antonio ranch homes built between 1960 and 1985. A window that slams shut instead of staying up usually needs new balances, which is a one-hour fix we price in writing before touching anything.

Sash and Frame Rot Repair

Wood windows in New Braunfels and older parts of San Antonio pick up sill rot from sprinkler overspray and weep hole clogs. We cut out the rotted section, treat the surrounding wood, and rebuild with epoxy or fresh lumber before reinstalling the sash, and we photograph the clean-up before we leave your home.

Window Replacement Company

A window replacement company is a licensed contractor that removes old windows, preps the openings, installs new units, and stands behind the work with a written warranty. Choosing the right Window Replacement - San Antonio company matters more than choosing the right window, because the best glass in the world leaks air and water if the flashing and insulation around the frame aren’t done correctly. Lightwell Windows San Antonio is an independently operated Cedarwell location, led by Keith Yamada, and we install across eight manufacturer brands so the window fits your home rather than our supplier’s warehouse. Full-frame replacements run $650 to $1,400 per opening, while insert replacements into sound existing frames run $450 to $900 per opening. Every quote is in writing before any work starts, and the number on that quote is the number you pay.

What “Done Right” Means on a Job Site

Our uniformed, background-checked technicians follow the C.A.R.E. values on every visit: Clean up like it’s our own home, Ask before moving or touching anything, Respect the family’s time and quiet hours, and Explain the price before the work. Shoe covers and drop cloths go down in every room we walk through, so floors and rugs in Timberwood Park and Window Replacement - Schertz stay exactly as we found them.

Why We Carry Eight Brands

Most window companies in San Antonio carry one or two manufacturers and then sell you on whichever one they have in stock. We stock and install PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux, which means your quote reflects the best window for your home’s elevation, code requirements, and budget, not the only window we happen to carry.

Window Glass Replacement

Window glass replacement is swapping the insulated glass unit, or IGU, inside an existing window frame without removing or replacing the frame itself. In San Antonio we do this most often for fogged glass, cracked panes from hail or stray baseballs, and single-pane glass in older homes that owners want upgraded to double-pane without the cost of a new frame. Depending on the glass size and coating, an IGU replacement runs $300 to $600 per window, which is about half what a full unit replacement costs. We install replacement glass from Mr-Glass and ECO Window Systems, both of which fabricate IGUs with low-E coatings and argon fills that match or exceed the performance of your original glass.

Fogged Glass and Failed Seals

Moisture between the panes means the perimeter seal has failed and the argon or krypton gas fill has escaped, so the window now insulates about as well as single-pane glass. We measure the exact IGU dimensions, order the replacement, and swap it in about an hour per window once the glass arrives from the fabricator.

Single-to-Double Pane Upgrades

Older San Antonio homes near downtown and in Alamo Heights often still have single-pane aluminum windows that transmit heat and street noise. If the frames are square and the tracks are sound, we can replace just the glass with a double-pane low-E unit, dropping your room temperature and energy bill without the cost of tearing out the frame.

Window Sash Replacement

Window sash replacement is replacing the movable part of the window, the frame that holds the glass, rather than the entire window unit including the outer frame. You need this when the sash itself is broken, rotted, warped, or has failed hardware that can’t be repaired, but the surrounding frame is still square, level, and watertight. In San Antonio, sash replacement is most common on double-hung wood windows in pre-1980 homes around Terrell Hills, Alamo Heights, and Monte Vista, where owners want to keep the original trim and character. A replacement sash runs $250 to $550 per sash depending on wood species and glass package. Lightwell Windows San Antonio will tell you plainly when a sash replacement saves you money and when the frame has problems that make a full replacement the smarter spend.

Matching Existing Trim and Profile

When we replace a sash on an older home, we order the new sash to match the existing stop profile and glass reveal so the window still looks original from the street. We can also match custom wood species and stain on homes in Alamo Heights where original detailing matters to the character of the house.

When Sash Replacement Beats Full Replacement

If your window frames are plumb and the exterior brick or siding hasn’t moved, a sash replacement gets you new glass, new balances, and new weatherstripping for less than half the cost of a full tear-out. We’ll check the frame with a level and moisture meter before recommending this path, because a sash in a bad frame is just a new window in an old problem.

Window Glass Repair

Window glass repair is fixing damage to the glass itself, most often a crack, chip, or small puncture, without necessarily replacing the entire pane or window unit. In San Antonio, we see impact damage from hail storms that roll through in April and May, from mowers kicking up gravel in neighborhoods like Castle Hills and Lackland AFB, and from kids and balls in every subdivision in between. Small chips can sometimes be filled with resin if they’re caught early, but most cracks in residential glass mean replacing the IGU, which runs $300 to $600 per unit. We’ll tell you over the phone whether a crack is a repair or a replace, and we’ll write the price down before we send a technician to your home.

Chip Repair and When It Works

A small chip with no radiating cracks can sometimes be stabilized with a clear resin fill, similar to a windshield repair, which keeps moisture out and buys time before a full pane replacement. We’ll be honest about when a chip is too deep or too close to the edge to save, because a repaired chip that fails in six months is a wasted $75 to $150.

Cracked Glass and Safety

A crack that spans the pane or reaches the edge means the glass has lost its structural integrity, and the pane now flexes with every temperature change, which spreads the crack further. Double-pane units with a cracked outer pane are also letting air and moisture reach the inner pane, so the window is losing its insulating value even before you see fogging.

Window Pane Replacement

Window pane replacement is replacing one pane of glass, either the outer or inner pane of an insulated unit or a single pane in an older window, rather than the entire sash or frame. We most often replace individual panes on San Antonio homes with older single-pane wood windows, where the glass can be reglazed into the existing sash, and on double-pane units where one pane is cracked but the seal between panes is still intact and dry. A single pane replacement runs $100 to $275 depending on glass type and accessibility, which is significantly less than a full IGU replacement. When a double-pane unit has one cracked pane but the seal is still holding, we can sometimes replace just that pane and reseal the unit in our shop.

Reglazing Historic Wood Sashes

Older homes around Alamo Heights and Monte Vista have wood sashes with glazing putty that eventually dries, cracks, and falls out. We remove the old putty and glazing points, set the new pane, and reglaze with modern putty that stays flexible through San Antonio’s heat-and-cold cycles.

Seal Integrity After a Pane Replacement

If one pane of a double-pane unit cracks, the question is whether the spacer and seal between the panes is still intact enough to keep the gas fill in place. We test with a moisture meter and inspection of the spacer bar before recommending a single-pane fix, because resealing a unit that already leaked is just deferred fog.

Window Seal Repair

Window seal repair is restoring the air and moisture seal around a window unit, either between the glass panes of an insulated unit or around the frame where the window meets the wall. In San Antonio, we see exterior frame seals fail from sun exposure and caulk drying out after seven to ten years, while inter-pane seals fail from thermal stress when daytime heat hits 95 and nighttime drops to 55. A failed inter-pane seal means the IGU needs replacement, which runs $300 to $600 per unit, while failed perimeter seals around the frame can often be recaulked and re-flashed for $75 to $200 per window. Lightwell Windows San Antonio replaces or repairs both kinds of seals, and we’ll tell you which problem you have rather than selling you the bigger fix.

Perimeter Caulk and Flashing

Caulk around the exterior of the window frame cracks and pulls away over time, especially on south and west exposures in San Antonio where the sun beats on the same surface for hours every afternoon. We’ll cut out the old caulk, inspect the flashing underneath, and reseal with a premium elastomeric sealant that flexes with the frame.

Inter-Pane Seal Failure and Fog

When the seal between two panes fails, moisture and air get in, the gas fill escapes, and you see condensation or haze between the glass that can’t be wiped away. That window now insulates like single-pane glass, so the fix is a new IGU with fresh low-E coating and argon fill, installed into the same frame.

Brands We Service

We install and service all eight brands in our lineup, and we stock replacement parts and glass for each one. ECO Window Systems builds a high-performance impact and non-impact vinyl line that we specify often in San Antonio for its strong U-factor numbers and realistic wood-look interior finishes. Mr-Glass fabricates custom IGUs locally in Texas, which means faster turnaround on glass replacements when you have a fogged or cracked pane and don’t want to wait three weeks for a factory order.

Therma-Tru is our top door brand, and many San Antonio homes with Therma-Tru entry doors also have matching sidelites and transoms that need glass work or replacement at the same time. ViewLux offers large-format and custom-shaped window units that work well in mid-century homes in Alamo Heights and Terrell Hills where oversized glass is part of the architecture. Whether you have one of these brands or any other make, we can help with repair or replacement.

Signs You Need a Pro Right Now

• Fog or condensation between the glass panes. This means the inter-pane seal has failed and the gas fill is gone. The window is now insulating like single-pane glass, and San Antonio humidity will make the fog worse every day.
• A crack that reaches the edge of the pane. Edge cracks spread with every temperature cycle, and our 40-degree overnight swings in spring and fall will grow the crack quickly. A cracked pane also lets moisture into the wall cavity if water gets through the glass.
• The window won’t stay open or slams shut. Failed balances are a safety issue, especially in rooms where kids play near the windows. A double-hung window that drops shut can break fingers, and the fix is usually a one-hour balance replacement.
• You can feel air moving around the closed window. Drafts mean the perimeter weatherstripping or caulk has failed, and in San Antonio that means hot humid air is pushing through your window frame all summer. This drives up cooling bills and lets dust and pollen in during cedar season.
• Wood around the sill is soft, spongy, or dark-stained. Soft wood means rot, which means water is getting past the window flashing and into the wall framing. Left alone, sill rot spreads into the studs, and a $300 repair becomes a $3,000 wall rebuild.

Our Process, Step by Step

We keep the process simple and written down so you know what’s happening from the first phone call to the final walk-through.

1. 1
   Call and talk to a live person. When you call (325) 420-4173, a real person answers and books your free estimate. We’ll ask about the windows you’re concerned about, the age of the home, and any symptoms like fogging, drafts, or rot.
2. 2
   In-home estimate with written pricing. Keith Yamada or a member of our San Antonio team walks the home, measures each opening, checks the frames with a level and moisture meter, and listens to what’s bothering you about the current windows. You get a written, line-item price before we leave, covering everything down to haul-away and trim painting.
3. 3
   Order and schedule. We order your windows from the manufacturer that best fits the spec, then call you with a firm install date. Lead times run two to six weeks depending on brand and glass package, and we stay in touch between order and install.
4. 4
   Installation day, done the C.A.R.E. way. Our uniformed, background-checked crew arrives on time, puts down shoe covers and drop cloths in every work area, and protects floors, furniture, and pets. We ask before moving anything, respect nap times and quiet hours for kids and pets, and clean up as we go.
5. 5
   Final walk-through and clean-up photo. Before we leave, we walk the home with you, test every window, and photograph the clean-up so you have a record of the condition we left your home in. If anything isn’t right, the 365-Day Done Right Promise covers it, no debate and no countdown.

How Much Does Window Replacement Cost in San Antonio?

Our Service Area Near San Antonio

Lightwell Windows San Antonio serves homeowners throughout San Antonio and the surrounding communities, including Schertz, Selma, New Braunfels, Helotes, Kirby, Terrell Hills, Timberwood Park, Alamo Heights, Castle Hills, Lackland AFB, and Leon Valley. Most of our San Antonio customers see a one to two day response time for estimates, and we schedule installs around your family’s routine, not the other way around. If you’re in Schertz or Selma, you can also visit our pages for Window Replacement in Schertz or Window Replacement in Selma for more specific pricing and coverage details.

Frequently Asked Questions About Window Replacement in San Antonio

Schedule Your Window Replacement Service in San Antonio Today

When you’re ready to price out new windows for your San Antonio home, call (325) 420-4173 and ask for Keith Yamada. You’ll get a free, no-obligation estimate with a written price before any work starts, and a live person answers around the clock. A light well is what brings daylight deep into a building, and that is what a well-installed window should do for your home.

Written by Keith Yamada, Owner at Lightwell Windows San Antonio, serving San Antonio since 2010.