Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterFast, Reliable Patio Door Installation Across Redwood City
Patio door installation in Redwood City typically runs $2,800 – $7,500 depending on the door type, glass package, and whether the rough opening needs structural work. Most standard sliders and French door replacements take one to two days on site once the door arrives. If you’re weighing a replacement, call us at (817) 686-2228 for a written, line-by-line estimate before any work is scheduled. We serve the entire Redwood City area, from Redwood Shores to Emerald Hills, and we spec every door for the specific wind and seismic conditions that apply here.
Meridian Windows & Doors handles Patio Door Installation across the Peninsula with a simple operating rule: the price goes on paper before the first screw turns, and the work is covered in writing for a full year. Our crews know Redwood City’s housing stock, its permit office, and the building code details that catch out contractors who don’t work here regularly. Elliot Vance runs our team with the same standard we’ve held since 2009: show up when promised, do the job correctly, and stand behind it without fine print.
Why Meridian Windows & Doors Is Redwood City’s Preferred Patio Door Installation Company
We work in Redwood City every week, from the mid-century ranches off Edgewood Road to the newer builds in Redwood Shores. Homeowners here have dealt with no-show contractors and vague verbal quotes. That’s why every job we quote includes a written scope, a fixed price, and the 365-Day Done Right Promise in writing. If the installation fails within that year, we come back at no charge. That’s not marketing language – it’s the guarantee on every contract.
Our technicians are background-checked and uniformed, so when a Meridian crew walks up your driveway in Redwood City, you know exactly who you’re letting in. We answer the phone 24/7 with a live person. No voicemail loops, no callback three days later. And because we’re part of the Garrison Partners family, we’re held to The Garrison Standard on every installation – the same discipline applied to commercial-grade door systems across the Bay Area.
Our local reputation in Redwood City comes from doing the unglamorous things right: pulling permits when required, flashing thresholds against winter rain, and leveling tracks so a sliding door doesn’t bind six months after install. We don’t chase the lowest bid. We write down what the job costs, do it correctly, and move on.
Sliding Door Replacement in Redwood City
Sliding door replacement in Redwood City usually means removing an original aluminum slider from a house built between 1950 and 1980 and installing a modern vinyl or aluminum unit that meets current wind and energy codes. The old door comes out, the rough opening gets inspected for rot or racking, and the new unit goes in with proper flashing and sealing. In Redwood City, a standard 6-foot sliding door replacement runs $2,800 – $4,200. An 8-foot unit with impact-rated glass and a laminated interlayer runs $4,500 – $6,800. Larger openings or rotted subfloor push the job toward the top of that range.
What Replacement Involves
The crew pulls the old door and interior trim, then checks the rough opening for square and level. In Redwood City’s mid-century homes, we frequently find corroded tracks and water-damaged subfloor at the threshold. That’s not a scare tactic – it’s what happens after 50 years of Bay-facing weather. When we find rot, we replace the damaged framing before the new door goes in, and we show you photos before we do it. No surprises, no change orders slipped in at the end.
When a Redwood City Homeowner Needs Replacement
The practical triggers are simple: a slider that jams on the track, fogging between glass panes, a draft you can feel in winter, or visible rot at the threshold. If the door faces the Bay or an exposed hillside, wind-driven rain finds every unsealed jamb. A fogged or binding door isn’t something to live with – it’s a signal the unit has failed and water is already working into the rough opening.
Sliding Door Installation in Redwood City
Sliding door installation in Redwood City for new construction or an addition typically runs $3,200 – $7,500 depending on glass package, door size, and whether the wall opening is new or retrofit. New construction means framing the opening, installing the header, and coordinating with your general contractor or our in-house team. Retrofit installation into an existing opening runs lower, but still requires the same weather sealing and structural anchoring.
New Construction vs. Retrofit
New construction gives us the cleanest installation: the rough opening gets framed to the manufacturer’s exact specs, the pan gets set before the door, and there’s no 50-year-old rot hiding in the jamb. Retrofit work in Redwood City means working around existing siding, stucco, or brick veneer – and occasionally discovering that the original framing wasn’t built to hold a modern unit. Either way, we anchor the door per the manufacturer’s installation instructions and Redwood City’s current building code.
Glass and Weatherproofing Decisions
For Redwood City specifically, we recommend low-E glass with a laminated interlayer on any patio door exposed to sustained wind or southern sun. Low-E is a thin coating that reflects heat while letting light through – it keeps the house cooler in summer and cuts UV fading inside. The laminated interlayer holds the glass together if impact occurs, which matters in a Zone 4 seismic area where the ground can shift and a jamb can twist. These choices add $800 – $1,500 to material cost but they’re required by code for certain exposures and they perform measurably better in this climate.
Trusted Brands We Service in Redwood City
We install and replace patio doors from a portfolio that includes CGI, CWS, and ES Windows, among eight manufacturer lines. We stock common replacement parts and glass units for Redwood City customers, which means a failed roller, latch, or sealed unit doesn’t leave your home open to the weather while we wait on a factory order. If we’re servicing an existing CWS or CGI door, we can often pull parts locally and turn the repair around in days, not weeks.
Common Patio Door Installation Problems We See in Redwood City Homes
- Corroded aluminum tracks and jammed rollers. Original sliders in 1960s-era homes near Edgewood Road and the Atherton border have tracks that corrode from decades of coastal air. Once the track is pitted, the rollers bind and the door takes force to move – which then warps the panel.
- Rotted subfloor at the threshold. Patio doors that face the Bay or open onto a hillside get wind-driven rain seeping under the sill. When we pull the old unit, we often find the subfloor soft or delaminated. That rot must be cut out and replaced before the new door can be properly flashed.
- Unflashed jambs on exposed-facing doors. A door that was never properly shimmed or sealed leaks in the first winter storm. In Redwood City, a sheltered inland installation might survive for years, but a west-facing door on an open hillside takes the full force of winter storms. Proper flashing is not optional here.
- Underestimated permitting scope. If the replacement changes the opening size or the door’s egress configuration, Redwood City requires plan review and an inspection. Homeowners sometimes assume a door swap needs no permit. It often does, and skipping it means a failed final inspection and a delay on your project.
Pricing for Patio Door Installation in Redwood City, CA
Here’s what we tell Redwood City homeowners on the first call. A basic 6-foot vinyl sliding door replacement runs $2,800 – $4,200 installed. An 8-foot slider with impact-rated, low-E laminated glass runs $4,500 – $6,800. New construction or a retrofit with a new rough opening runs $3,200 – $7,500 depending on framing and glass. French door replacements start around $3,500 and climb based on panel count and glass package. What changes the price: rotted framing discovered during removal, required engineering for a larger opening, permitting fees, and glass upgrades for wind or egress code. We give you the written price before work starts, and it does not move unless the scope genuinely changes – in which case we show you the number and get your sign-off first. Call (817) 686-2228 for a free estimate with exact numbers for your specific door and opening.
We Also Serve Cities Near Redwood City
Our crews work throughout the Peninsula. In addition to Patio Door Installation in Redwood City, we regularly serve homeowners in Atherton, Menlo Park, San Carlos, and Palo Alto. The same written pricing, the same 365-day guarantee, and the same local code knowledge apply everywhere we go.
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 Patio Door Installation in Redwood City
Yes, in many cases. If the replacement keeps the same rough opening size and does not alter egress, it may qualify as a like-for-like swap with a simple inspection. If the opening changes size, the door’s swing or sliding direction changes, or the egress path is affected, Redwood City requires plan review and a building permit. We check the specific requirements for your home before we quote the job, and we pull the permit ourselves. Call (817) 686-2228 and we’ll tell you exactly what applies to your address.
Redwood City sits in a high-wind-exposure, seismic Zone 4 area along the Peninsula. For doors facing the Bay or an exposed hillside, the building code requires design pressure ratings and often a laminated glass interlayer. Low-E coating is standard for energy performance. We spec glass based on the door’s exact exposure, not a guess, and we include the specific glass package in your written quote.
A typical replacement takes one to two days on site once the door is delivered, though the full timeline from order to completion runs three to six weeks for custom glass orders. Stock sizes and configurations in standard glass move faster. If permitting is required, add one to two weeks for plan review before installation. We give you a realistic calendar with your written estimate – no vague promises.
We install and service patio doors from CGI, CWS, ES Windows, ECO Window Systems, PGT, Mr-Glass, Therma-Tru, and ViewLux. The right door for your home depends on exposure, opening size, and budget. Because we carry eight lines, we spec the door that fits the job, not the one sitting in a warehouse. Call (817) 686-2228 and we’ll recommend specific models based on your home’s location in Redwood City.
Three things can change the price, and none of them should be a surprise. Rotted framing or subfloor discovered after the old door is removed must be replaced before the new unit goes in. An opening that is out of square or racked may need structural correction. And if you decide mid-project to upgrade glass or add a custom finish, that changes the material cost. We show you the exact number and get your approval before any change-order work starts. Your original written price stands unless the scope genuinely changes.
If you’re ready to get a real number for your patio door installation in Redwood City, call (817) 686-2228. We’ll schedule a measurement visit, walk you through the options that fit your home and exposure, and put the price in writing before any work begins. No pressure. No vague ranges. Just a straight answer and a written guarantee.
Written by Elliot Vance, Owner at Meridian Windows & Doors, serving Redwood City and the Bay Area since 2009.