Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
After
Before
AfterFast, Reliable Door Replacement Across Foster City
Replacing an exterior door in Foster City usually costs between $1,100 and $4,800 depending on the door type, frame condition, and whether the opening needs to change. Most standard single-door replacements here run $1,100 to $2,600, while larger sliders or custom fiberglass units land higher. Our Door Replacement team handles the full scope: pulling Foster City permits, ordering the right door for lagoon-side moisture, installing it square and sealed, and leaving the old door hauled away. Call (682) 281-2168 for a written price before any work starts.
We know this city’s quirks. Foster City isn’t just another Bay Area suburb. It’s a planned community built largely on engineered fill, ringed by lagoons, with a building department that takes floodplain rules seriously. That changes how a door gets spec’d, permitted, and installed here. We’ve worked on homes from the Isle Cove waterfront to the townhome clusters near Leo J. Ryan Park, and we understand what the inspector will check before signing off.
Why Juniper Windows & Doors Is Foster City’s Preferred Door Replacement Company
We’ve earned a strong local reputation in Foster City by doing one thing consistently: writing the price down before the first cut, then sticking to it. Homeowners here tell us the same story about other contractors: a vague verbal estimate, a change order at the door, a “while we’re here” upsell. That doesn’t happen with us. Every job gets a fixed, line-item quote in writing, governed by the Relay Visibility Guarantee: you’ll see a live arrival time, before-and-after photos, and a digital invoice you can pay from your phone.
Sean Mackey leads our team, and he’s built the operation around a simple standard: background-checked, uniformed technicians on every job. You’ll know exactly who’s walking through your door because you’ll see their name and photo before they arrive. We answer the phone live, 24/7. No voicemail maze, no callback queue, no “someone will get back to you.”
We’re not a general contractor dabbling in doors. Juniper Windows & Doors, founded in 2001 as part of the Relay Home Co. family, specializes in windows and doors. That focus means our installers understand U-factors, impact ratings, and sightlines at a level a generalist never will. And our 365-Day Done Right Promise covers every installation in writing: if it’s not right, we make it right, parts and labor, for a full year.
Door Installers in Foster City
Door Installers in Foster City do more than hang a slab on hinges, especially when the home sits near the lagoon. Our installers start by pulling the permit with Foster City’s building department, which matters because a door opening that changes dimensions can trigger a floodplain review on engineered-fill lots. From there, the work involves removing the old door and frame, inspecting the rough opening for rot, installing the new unit level and plumb, sealing against coastal moisture, and scheduling the inspection.
We bring written pricing to the first visit. A straightforward front door swap in a Foster City home typically runs $1,100 to $2,600. A full-frame replacement with custom sizing, flood-compliant threshold work, or rot repair lands between $2,400 and $4,800. You’ll see the number before you sign anything.
Sliding and Patio Doors
Lagoon-facing rooms in Foster City lean heavily on sliding glass doors, and those units fail in ways a front door never will. Rollers wear out, tracks collect silt and salt, and frames lose their seal against wind-driven rain. We replace sliders with units sized to the existing rough opening where possible, or reframe when the opening needs modernizing. Impact-rated glass is an option we spec regularly for waterfront exposures.
Front Entry and Fiberglass Systems
Foster City’s foggy mornings and salty lagoon air chew through wood doors faster than most homeowners expect. We often recommend fiberglass systems like Therma-Tru because they don’t warp or swell in this climate, and they take a raised threshold without splitting. The look stays clean, and the seal actually holds.
Door Contractors in Foster City
Door Contractors in Foster City are licensed, insured professionals who manage the full project, not just the installation hour. We handle the permit application, coordinate with Foster City’s building department on floodplain requirements, order the door from one of eight product lines, install it, and pull the final inspection. You don’t chase paperwork. We do.
For a Foster City homeowner replacing a door that changes the opening size, the permit process adds real calendar time. Plan for the building department to review the floodplain elevation certificate, which can add one to three weeks depending on current review loads. We’ll tell you that timeline up front, in writing, and we’ll include permit fees in your quote so there’s no surprise line item later.
Permitting and Floodplain Compliance
Foster City sits in a special flood hazard area near the lagoons, and many homes rest on engineered fill. That combination means a door replacement isn’t always a simple like-for-like swap. Raised thresholds, flood-compliant sealants, and elevation documentation all come into play. We’ve navigated this enough times that we can tell you honestly whether your project needs a full floodplain review or a simple over-the-counter permit.
Moisture Remediation and Rot Repair
Lagoon moisture gets behind door jambs in Foster City more than owners realize. When we pull a frame, we regularly find hidden dry rot that changes the scope on the spot. Our written quote process handles this: we’ll quote the door replacement, and if demolition reveals framing damage, we’ll stop, show you photos, and give you a new written price before proceeding. No change order surprises, no “trust us” moments.
Trusted Brands We Service in Foster City
We stock and install doors from Therma-Tru, PGT, CGI, ViewLux, and CWS, which means the right door for a Foster City home is never a compromise. For lagoon-front exposures, we lean on PGT and CGI impact-rated glass rated to resist wind-borne debris without shattering. ViewLux gives us modern sightlines for homeowners wanting bigger glass and thinner frames. Therma-Tru fiberglass handles the moisture cycle along the water better than wood ever will. Because we’re part of the Relay Home Co. family with more than two decades of installations, our access to local parts stock means faster turnaround when your Foster City project needs a specific threshold, sweep, or hinge pack.
Common Door Replacement Problems We See in Foster City Homes
- Floodplain permit delays. When a door opening changes on an engineered-fill lot near the lagoon, Foster City’s building department may require an updated elevation certificate review. That can add one to three weeks to the schedule, and we build that timeline into our written estimate so you’re not waiting blind.
- Hidden rot from lagoon moisture. The high water table and persistent coastal humidity push moisture into door frames, especially on north-facing elevations near the water. We frequently find dry rot or water staining behind the jamb once demolition starts, which increases scope and cost. Our process gives you a new written price the moment we see it, with photo proof.
- Failed thresholds and flood seals. Foster City’s floodplain rules require specific threshold heights and sealing details that many general contractors miss. An incorrect threshold can fail inspection, forcing rework and a second visit. We install raised, sealed thresholds that pass the first time.
- Salt-air frame degradation. Homes within a few blocks of the lagoon see faster corrosion on metal frames and hardware, plus swelling on wood doors. Choosing a fiberglass or properly coated aluminum system, spec’d for this specific exposure, prevents a repeat replacement in five years.
Pricing for Door Replacement in Foster City, CA
A standard single exterior door replacement in Foster City runs $1,100 to $2,600. That includes the door slab, installation, basic hardware, trim work around the frame, and haul-away of the old unit. A full-frame replacement where the rough opening changes, or where the new door needs flood-compliant threshold work, runs $2,400 to $4,800. Sliding glass patio doors land in the $1,800 to $5,200 range, with premium impact-rated units at the upper end.
What moves the price: whether the door is a slab swap or full-frame, the material (steel, fiberglass, or impact-rated glass), whether Foster City requires a floodplain review, and whether rot repair is needed once the old frame comes out. We give you all of this in writing before work starts. Call (682) 281-2168 to schedule a free estimate and get your exact number.
We Also Serve Cities Near Foster City
Our crews serve Foster City and regularly run jobs in nearby Bay Area cities including Los Angeles, San Diego, San Jose, and San Francisco. If you’re on the Peninsula or across the Bay, we’ll bring the same written pricing, live arrival times, and 365-Day Done Right Promise to your door. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, with crews working locally in Foster City.
Serving Foster City, CA - Our Local Coverage Area
We’re based in the Foster 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 Door Replacement in Foster City
Yes, if the door opening changes size or the replacement affects floodplain requirements on your lot, you’ll need a permit from Foster City’s building department. A simple like-for-like slab swap on an existing frame may not require one. We handle the permit application and fees as part of your written quote, so you never guess. Call (682) 281-2168 and we’ll tell you which category your project falls into before you spend a dollar.
Most standard single-door installations take one day of on-site work. If your project needs Foster City floodplain review, add one to three weeks for the permit process before installation day. We’ll give you a calendar with your written quote, including the inspection date, so you know exactly when the job completes.
We install Therma-Tru, PGT, CGI, ViewLux, CWS, ES Windows, ECO Window Systems, Mr-Glass, and CWS door products. For Foster City lagoon-front homes, we often recommend Therma-Tru fiberglass for moisture resistance and PGT or CGI for impact-rated glass. Your quote will name the exact brand and model, never a “comparable alternative.”
Yes. We install impact-rated glass doors rated to resist wind-borne debris without shattering, which matters for homes facing open water on the lagoons. PGT and CGI both offer impact-rated units we spec regularly for Foster City. Expect impact-rated glass to add $900 to $2,400 to your project depending on size and frame system. Call (682) 281-2168 for an exact quote.
The two things that change price are hidden rot behind the existing jamb and unexpected framing conditions once the old door comes out. Both are common in Foster City due to lagoon moisture and older engineered-fill construction. Our process protects you: if we find something, we stop, take photos, and give you a new written price before proceeding. You approve it, or we don’t do the work. No change orders without your sign-off.
Written by Sean Mackey, Owner at Juniper Windows & Doors, serving Foster City. Juniper Windows & Doors is a windows-and-doors specialist inside the Relay Home Co. family, focused exclusively on replacement windows and doors since 2001.