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Before
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Before
AfterWindows & Doors in Redwood City, CA
Window installation in Redwood City means working around two forces that pull in opposite directions: hard afternoon sun on the west side, and salt air drifting off the Bay on the east. Most of the housing here dates from the 1950s through the 1970s, and a lot of it still carries original single-pane aluminum sliders and hollow-core doors that leak conditioned air and corrode at different speeds depending on which side of El Camino Real you live on. We write the price before any work starts, and we document every opening with photos when the job is done. Call Sightline Windows & Doors at (509) 265-6387 for a measured survey you keep.
Why Redwood City Homes Are Different
Redwood City sits far enough inland that the marine layer burns off earlier than it does in San Carlos or Menlo Park, and the difference shows up in window frames. South- and west-facing glass in Farm Hill or Emerald Hills absorbs hours of direct afternoon sun that homes a few miles north never see. That makes solar heat gain coefficient, or SHGC, the number that tells you how much solar radiation passes through the glass, a real specification here rather than a footnote. On the Bayshore side, the story flips. Homes near the Port of Redwood City and the flats east of Highway 101 sit in persistent marine humidity, and the salt air accelerates oxidation on aluminum frames and steel door hardware. We regularly open up 1960s aluminum sliders on the east side and find the frames have turned to white powder inside the track, a failure mode that hillside homes two miles west almost never show. A window or door that works fine at the top of Farm Hill Boulevard is not the same product as one that survives a decade on the Bayshore flats.
Our Main Redwood City Services
Two jobs come up more than any other when we walk Redwood City homes: full door replacements where the slab and frame have warped or corroded, and whole-house window replacements on mid-century ranch stock that still has the original single-pane aluminum. Both start with the same measured survey, and both get a written price before anything is ordered.
Door Installation in Redwood City
Most Redwood City door work we see falls into two patterns: hollow-core original doors on 1960s ranches that have swollen or split, and entry door frames near the Bayshore that are rusting at the threshold from decades of marine air. We replace the full frame, not just the slab, so the new door seals against the opening rather than inheriting the old one’s air leaks. Salt exposure on the east side means we specify stainless or composite thresholds and corrosion-resistant hinges as standard there, not as an upgrade. Every job gets a written price before work starts and a photo record at the end. See what the full job involves on our Door Installation in Redwood City page.
Window Replacement in Redwood City
Redwood City’s mid-century ranches make window replacement a different calculation depending on which way the glass points. West-facing openings in the hills take the thermal load and need a lower SHGC to cut afternoon heat gain, while east-side openings need frames and hardware that can stand up to salt humidity. We measure every opening and write the price from those measurements, not from a square-foot average. That means the quote you read is the price you pay, and the survey document is yours to keep. For the full breakdown of glass specs, frame options, and local permits, see our Window Replacement in Redwood City page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterWindow Installation in Redwood City
Window installation in Redwood City usually means pulling original single-pane aluminum out of 1950s-1970s ranch homes, where the frames have either oxidized from Bayshore salt air or baked under years of Peninsula sun. The job is rarely a simple swap: we’re correcting air leaks, upgrading Title 24 compliance, and often changing the glass spec entirely because the original units were never chosen for this climate’s heat load. Our Window Installation process starts with a measured survey we hand to you, so the written price and the final invoice are the same document.
Single & Double Hung Windows
Signs you need it
Sashes that stick, rattle, or drop when you raise them, plus visible gaps where the sash meets the frame.
What it costs in Redwood City
Replacement single and double hung units in Redwood City typically run $600-$1,500 per opening, installed, depending on frame material and glass package.
How we do it
We measure the pocket opening, order to the exact rough dimensions, remove the old sash and balance hardware, set the new unit, insulate the perimeter, and trim out to match.
Casement Windows
Signs you need it
Crank mechanisms that skip or bind, glass that fogs between panes, or frames so corroded the operator no longer seats the sash against the weatherstripping.
What it costs in Redwood City
Casement replacements here are typically $900-$2,200 per window, installed, with the hardware and hinge package included.
How we do it
We remove the old sash and frame, check the rough opening for rot or corrosion at the corners, set a plumb and level new frame, hang the sash, and adjust the crank for full compression.
What Window Installation Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Single hung window replacement | $600-$1,200 per opening |
| Double hung window replacement | $900-$1,500 per opening |
| Casement window replacement | $900-$2,200 per opening |
How long does window installation take in Redwood City?
Most whole-house replacements on a standard ranch run three to five working days, depending on the number of openings and whether we find rot or corrosion in the rough openings that needs correction before setting new frames.
Will the price change once the job starts?
No. The measured survey fixes the price in writing before work begins. Call (509) 265-6387 for the survey and the written quote that comes with it.
Impact Windows & Doors in Redwood City
Impact windows and doors in Redwood City address a risk that runs quietly through the flats: the Bay’s salt air is the daily threat, and the structural wind load is the event threat. Homes near the Port and along the Bayshore sit in an exposed corridor where marine-grade wind gusts and airborne debris are a real concern, and original aluminum frames from the 1960s were never engineered for either. Our Impact Windows & Doors program specifies laminated glass and reinforced frames sized to the opening, not off a dealer sheet.
Impact-Resistant Windows
Signs you need it
Original single-pane aluminum that bows visibly under hand pressure, or any opening facing an unobstructed easterly exposure toward the Bay.
What it costs in Redwood City
Impact-resistant windows here typically run $1,400-$3,200 per opening, installed, depending on frame material and whether the rough opening needs structural correction.
How we do it
We measure pressure zones per the building code, specify laminated glass and a matching reinforced frame, tear out the old unit, and set the new one with a continuous seal and code-required anchoring.
Horizontal Roller & Sliding Impact Windows
Signs you need it
Slider tracks that have corroded to the point where the sashes no longer interlock at the meeting rail, or glass that sits loose in the frame because the glazing channel has widened with age.
What it costs in Redwood City
Impact-rated horizontal rollers and sliders are typically $1,800-$4,000 per opening, installed, with the wider the glass run, the higher the cost.
How we do it
We replace the full frame and track assembly, not just the glass pack, so the interlocking meeting rail and the impact rating are tested as a single unit.
What Impact Windows & Doors Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Impact-resistant window | $1,400-$3,200 per opening |
| Horizontal roller impact window | $1,800-$4,000 per opening |
| Impact sliding glass door | $3,500-$7,500 per unit |
Do I need impact windows if I’m not on the water?
Most Redwood City homes are not in a mandatory impact zone, but Bayshore flats and exposed second-story openings benefit from the debris resistance and reduced air infiltration impact glass provides. Call (509) 265-6387 for an honest read on your specific exposure.
How do impact windows hold up against salt air?
The laminated glass handles salt exposure well, but the frame matters more than the glass. We recommend powder-coated or reinforced composite frames on the Bayshore side of Redwood City rather than bare aluminum, which oxidizes quickly there.
Energy-Efficient Windows in Redwood City
Energy-efficient windows in Redwood City are a heat-management intervention first and a gas-bill improvement second. The city’s sheltered position means west-facing glass bakes in afternoon sun that would be fog-cooled a few miles north, so the SHGC rating, which measures how much solar radiation the glass admits, is the spec that matters most on the hillside side of town. Our Energy-Efficient Windows process starts with a measured survey of every opening and a glass package chosen for the actual sun load and altitude of your house, not a default low-E formula.
Low-E & Argon Gas Glass
Signs you need it
Rooms that feel like an oven by 3 p.m. on summer afternoons, or original windows where the glass feels warm to the touch an hour after sunset.
What it costs in Redwood City
Low-E with argon-filled double glazing typically adds $150-$400 per opening over standard clear glass, depending on the size and the coating spec.
How we do it
We measure the solar orientation of each opening, select a low-E coating with the right SHGC for Redwood City’s sun exposure, and order the insulated glass unit with argon fill and a warm-edge spacer.
UV-Blocking & Fade Protection
Signs you need it
Hardwood floors, rugs, or upholstery near south- and west-facing windows that have faded in visible bands, or artwork that is bleaching out on one edge.
What it costs in Redwood City
UV-blocking glass packages in Redwood City typically add $100-$300 per opening over the base insulated unit, installed.
How we do it
We specify a laminated or coated glazing with a high UV-reflectance property, confirm the visible light transmission so the room doesn’t go dark, and replace the old sash or frame around it.
What Energy-Efficient Windows Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Low-E argon double glazing upgrade | $150-$400 per opening |
| UV-blocking glass package | $100-$300 per opening |
| Full energy package on a standard ranch | $12,000-$28,000 whole house |
What SHGC should I look for in Redwood City?
For west- and south-facing windows, a SHGC of 0.25 or lower makes a measurable difference in afternoon heat gain. North and east openings can run slightly higher without a comfort penalty.
Are energy-efficient windows worth it if I have single-pane aluminum now?
Yes. Replacing original single-pane aluminum with a code-compliant insulated unit typically cuts conducted heat gain through the glass by half or more, depending on the frame and the coating. Call (509) 265-6387 to get the written price for your openings.
Sliding & Patio Doors in Redwood City
Sliding and patio doors in Redwood City carry a double load: they’re usually the largest glass opening in the house, and they sit at ground level where salt air, garden moisture, and foundation movement concentrate their effects. Original aluminum sliders on 1960s ranches are often so corroded at the track that the door rides on bare metal and air moves through the gap year-round. Our Sliding & Patio Doors work replaces the full frame, track, and panel as a matched assembly, so the weather seal and the roller alignment are correct at the same time.
Patio Doors
Signs you need it
A door that scrapes, sticks, or lifts at the handle, plus visible daylight around the panel when it’s closed and locked.
What it costs in Redwood City
Patio door replacement in Redwood City runs $2,500-$6,000 for a standard 6-foot opening, installed, depending on frame material and glass.
How we do it
We remove the old door and frame, check the rough opening for rot or settling, set a plumb new frame with a continuous sill pan, and hang the new sliding panel on adjustable stainless rollers.
Impact Sliding Glass Doors
Signs you need it
Any patio door facing an eastern, bayward exposure where wind gusts and debris are a risk, or a door on a home that is being brought up to current wind-load code.
What it costs in Redwood City
Impact sliding glass doors in Redwood City typically run $3,500-$7,500 per unit, installed, with the laminated glass and reinforced frame included.
How we do it
We measure the structural opening, specify the impact-rated frame and laminated panel, and anchor the new assembly through the jambs and header per the manufacturer’s wind-load schedule.
What Sliding & Patio Doors Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Patio door replacement (6-foot) | $2,500-$6,000 per unit |
| Impact sliding glass door | $3,500-$7,500 per unit |
| Screen door installation | $300-$900 per door |
Why does my sliding door stick only in summer?
The aluminum track and frame expand with heat, especially on west-facing Redwood City walls that bake in the afternoon. Replacing the aged track with a properly shimmed, expansion-tolerant frame fixes the seasonal bind.
Can you replace just the glass panel instead of the whole door?
Sometimes, but on most original sliders the frame and track are already corroded or out of square, so a new panel in an old frame does not fix the air leak. Call (509) 265-6387 and we’ll tell you which situation you have.
Impact Garage Doors in Redwood City
Impact garage doors in Redwood City matter because the garage is typically the largest unprotected opening on the house and the one most exposed to wind pressure from the Bayshore. On the flats east of Highway 101, the door faces a combination of salt humidity, gust loads off the Bay, and aging wood or aluminum frames with no reinforcement. Our Impact Garage Doors work gives you a door that resists debris and holds its track alignment under wind load, built with the same written-price process as every opening we replace.
Hurricane-Rated Garage Doors
Signs you need it
A door that bows inward under hand pressure, hinge and roller wear that has loosened the sections, or a home that has never had a wind-load analysis on the garage opening.
What it costs in Redwood City
Hurricane-rated garage doors in Redwood City typically run $5,000-$12,000 for a double-wide opening, installed, including reinforcement struts and heavier tracking.
How we do it
We measure the opening and its exposure, order a wind-load-rated sectional or roll-up door matched to the garage’s pressure zone, reinforce the jambs and header, and set the track on a fresh, level run.
Garage Door Replacement
Signs you need it
Sections that have separated at the joints, rust through the lower panels from ground-level salt air, or a track that has pulled away from the jamb at the top.
What it costs in Redwood City
Standard garage door replacement in Redwood City runs $3,000-$8,000 for a double garage, installed, with the track, springs, and opener connection included.
How we do it
We remove the old door and track in one piece, correct any framing issues at the opening, and install the new door with fresh rollers, hinges, and a safety-spring system.
What Impact Garage Doors Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Hurricane-rated garage door | $5,000-$12,000 per unit |
| Standard garage door replacement | $3,000-$8,000 per unit |
| Energy-efficient garage door | $2,500-$7,000 per unit |
Do I need a wind-load-rated garage door in Redwood City?
Most single-story ranches in the flats do not require one by code, but any home near the Bayshore corridor or with a west-facing garage that catches afternoon gusts benefits from a reinforced door and track assembly.
Can I keep my existing garage door opener with a new impact door?
Usually yes, but the spring balance and the panel weight both change, so we re-tension the torsion assembly and re-set the opener’s force limits to match the new door. Call (509) 265-6387 to schedule the measured survey.
Custom & Geometric Windows in Redwood City
Custom and geometric windows in Redwood City tend to come from two places: the 1920s-1940s Craftsman bungalows downtown that have original shaped openings, and mid-century ranches whose owners want one focal glass wall or a radius-top feature without touching the rest of the fenestration. The challenge here is that a custom opening cannot be ordered off a dealer sheet, and Redwood City’s sun exposure means the glass spec on a curved or oversized unit still has to hold a real SHGC number. Our Custom & Geometric Windows process starts with a field measurement and a shop drawing you approve before anything is ordered.
Geometric & Shaped Windows
Signs you need it
An existing arched or angle-topped window that has failed at the corners, or an opening where the old wood frame has shrunk and no longer holds the glass square.
What it costs in Redwood City
Geometric and shaped windows in Redwood City typically run $1,200-$5,000 per unit, installed, depending on the frame shape, glass type, and whether the rough opening needs re-framing.
How we do it
We take a full template of the opening, produce a shop drawing with every arc and angle dimensioned, order the unit from that drawing, and set it into the corrected rough opening with a continuous seal.
Oversized Openings
Signs you need it
A window wall or large fixed-glass opening where the existing frame has sagged, the glass has stress-cracked at a corner, or the original install never had a proper header.
What it costs in Redwood City
Oversized window openings in Redwood City run $4,000-$15,000 per assembly, installed, with the structural header work included where required.
How we do it
We measure the rough opening and the sightline, confirm the header and jamb structure for the bigger glass size, and install the new unit with dual-pane glazing and a frame engineered for the span.
What Custom & Geometric Windows Costs in Redwood City
| Item | Typical range in Redwood City |
|---|---|
| Geometric or shaped window | $1,200-$5,000 per unit |
| Arched or curved window | $2,000-$6,500 per unit |
| Oversized fixed-glass assembly | $4,000-$15,000 per assembly |
Can you match the arched windows in my Craftsman bungalow?
Yes. We template the actual opening, not a catalog drawing, and order from a manufacturer line that does true radius and segmental arches, so the replacement fits the existing rough opening without filler panels.
How far out should I plan a custom window order?
Custom units run six to ten weeks from approved shop drawing to delivery. Call (509) 265-6387 early enough to review the drawing and the written price before the lead time starts.
Brands We Service in Redwood City
We specify from eight manufacturer lines, and for Redwood City work we lean on ES Windows and CWS for the higher-end frame systems, ECO Window Systems for energy-package value, and our brands cover impact-rated and custom glass without forcing a particular name. Parts for common ES and ECO models are typically available within a few days; custom glass packs run longer.
Pricing for Windows & Doors in Redwood City, CA
| Service | Typical range in Redwood City |
|---|---|
| Single hung window replacement | $600-$1,200 per opening |
| Double hung window replacement | $900-$1,500 per opening |
| Casement window replacement | $900-$2,200 per opening |
| Impact-resistant window | $1,400-$3,200 per opening |
| Low-E argon glass upgrade | $150-$400 per opening |
| Patio door replacement | $2,500-$6,000 per unit |
| Impact sliding glass door | $3,500-$7,500 per unit |
| Hurricane-rated garage door | $5,000-$12,000 per unit |
| Geometric or shaped window | $1,200-$5,000 per unit |
| Oversized fixed-glass assembly | $4,000-$15,000 per assembly |
What pushes price upward in Redwood City more than anything else is exposure: west-facing openings that need a lower SHGC, and Bayshore-side openings that need corrosion-resistant frames and hardware both cost more than a mid-spec replacement on a shaded north wall. Every price we write is fixed before work starts, so the number on the quote is the number on the invoice.
Neighborhoods We Serve in Redwood City
We work across the flatlands and the hills, from the Bayshore corridor up through the ranch tracts and into the older downtown streets. Each zone has its own failure patterns, and the measured survey accounts for which side of town the opening faces.
- Farm Hill
- Emerald Hills
- Redwood Shores
- Woodside Plaza
- Bayshore flats near the Port of Redwood City
Most survey appointments in Redwood City can be scheduled within a few business days. The written price follows the measurement, not the other way around.
Service Area - Cities Near Redwood City
We serve Redwood City and the surrounding Peninsula, with the same written-price process across every city. That includes Menlo Park, CA, San Carlos, CA, Palo Alto, CA, and Belmont, CA. If you’re a few miles outside Redwood City proper, call (509) 265-6387 and we’ll confirm coverage before scheduling the survey.
Serving Redwood City, CA - Our Local Coverage Area
We’re based in the Redwood City area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Windows & Doors in Redwood City
Most measured surveys in Redwood City are scheduled within three to five business days. The survey itself takes about an hour for a typical ranch home, and you keep the written measurements whether or not you proceed.
Replacement windows and doors in existing openings generally need a simple building permit, and any glass changes must meet California Title 24 energy requirements. We pull the permit and handle the inspection, and the documentation goes in your file.
If you live in a planned development, especially in neighborhoods like Redwood Shores, check your CC&Rs first. Some HOAs require specific frame colors or glass types. We can provide the spec sheet and drawing your board needs to review.
Call Sightline Windows & Doors at (509) 265-6387 to schedule your free estimate in Redwood City. The price is written before any work starts, and the survey document is yours to keep.
What happens when you call
- 1A real person answersNo phone trees - talk to a local windows & doors pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Redwood City Customers Say
"The survey measurements and the quote were the same piece of paper. Nothing changed on install day, which is not what happened with the two other companies we had out."
- Annette R."Replaced eight windows. They showed me the U-factor on the units they were actually fitting rather than the brochure numbers."
- Kofi B."They photographed the rotten sill they found under the old frame before replacing it, and the extra cost was agreed in writing before they carried on."
- Rosalind C.