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 Window Installation Across San Francisco
Window installation in San Francisco usually costs between $900 and $2,800 per opening, depending on the unit, the frame condition, and whether the home sits in a historic district that requires Planning Department review. Most jobs on Victorian or Edwardian row houses in neighborhoods like the Western Addition, Castro, and Mission take one to two days per window once permits clear. We know the difference between a straightforward swap and a job that needs rough framing rebuilt because the fog got there first. Call (562) 478-8017 for an exact written quote before any work starts.
Why Lightwell Windows & Doors Is San Francisco’s Preferred Window Installation Company
Our crews work in San Francisco every week, from the Outer Richmond to Noe Valley, and we have walked enough fog-belt blocks to know what west-facing salt air does to a wood sill. Led by Keith Yamada, our team has operated as part of the Cedarwell network since 2010, carrying the Cedarwell Care Promise on every job: shoe covers and drop cloths on each visit, a photo of the clean-up before we leave, and a written price before any work starts. Keith keeps the same operating rule on every San Francisco job: if it has not been put in writing, it has not been agreed to.
What separates us from the vinyl-swap crews is that we actually read the room, and by room we mean the house. A 1905 Edwardian flat in Haight-Ashbury with original rope-and-pulley sash windows is not the same job as a 1950s stucco home in the Outer Sunset with corroded steel casements. We specify accordingly, and we tell you why before we touch anything. Our phone is answered by a live person 24/7, not a voicemail tree, and that matters when something is off with a new install and you want a real human on the line.
Window Installers in San Francisco
Window Installers in San Francisco do more than set a frame and caulk it shut. The job here often means removing an original single-pane wood sash with a rope-and-pulley or chain counterbalance system that has been in the wall for a hundred years, assessing the rough opening for rot, and then installing a unit that satisfies both the homeowner and the Planning Department. A basic replacement in a non-historic Sunset District home typically runs $900 to $1,600 per window. A full retrofit with rebuilt rough framing and historically compatible sash profile can reach $2,800 per opening or more. When a San Francisco homeowner notices a draft, the visible window is often only half the story.
Historic District Replacements
In neighborhoods like the Western Addition, Castro, Haight-Ashbury, and Mission, many homes fall under the city’s historic district controls. That means the Planning Department reviews the proposed window profile before a permit is issued. A standard off-the-shelf vinyl unit will not pass. We help navigate that review and specify wood or wood-clad sashes with the right profile depth and muntin configuration for the era of the home.
Marine-Condition Framing
On the west side, near Ocean Beach and through the Outer Richmond, moisture intrusion is the constant. Our crews routinely rebuild sills, sill plates, and rough framing that have rotted from the outside in while the interior paint still looks intact. Swapping a window into a rotted opening is not an installation, it is a future failure waiting for the next winter storm.
Casement Windows in San Francisco
Casement Windows in San Francisco are one of the most common replacements we specify for fog-belt homes, and there is a reason for that. A well-sealed casement with marine-grade stainless hardware closes tighter than a double-hung against wind-driven moisture, which San Francisco has in abundance west of Twin Peaks. In the Outer Richmond and Outer Sunset, where west-facing walls take the brunt of the Pacific air, a casement with a low-E insulated glass unit holds the line far better than an original steel casement that has rusted through its hinges. Replacing a corroded steel casement with a new wood or fiberglass casement typically runs $1,200 to $2,600 per window in San Francisco, depending on frame condition and whether Planning review applies.
Coastal-Spec Hardware
Salt-laden air chews through standard zinc and cheap stainless hardware within a few years. We specify hot-dip galvanized or marine-grade stainless fasteners and hinges on every west-side install, and we seal the rough opening with materials rated for continuous moisture cycling. The difference between marine-grade hardware and the inland default is usually $40 to $90 per window. It buys a window that opens and closes smoothly ten years in.
Steel Casement Replacement in Sunset and Richmond
The post-WWII stucco homes in the Sunset and Richmond still carry tens of thousands of original steel casement and jalousie windows. They corrode heavily in the salt-laden marine air, seize shut, and are difficult to source replacements for in compatible profiles. We replace them with modern casements that keep the visual character of the home but do not rust into the frame within a decade.
Trusted Brands We Service in San Francisco
We carry a curated lineup of eight manufacturer brands, so the recommendation fits your home instead of our preferred vendor. In San Francisco, we commonly specify CWS for historically compatible wood-clad profiles, ES Windows for their marine-grade finish hardware testing, and ECO Window Systems for tight-budget replacements on non-historic homes. We keep local parts inventory and local supplier relationships across the Bay Area, which means a turnaround that does not stall while a part ships from the East Coast. Our Window Installation team pulls from the full lineup, not a shortlist, so you get a real choice rather than a sales pitch.
Common Window Installation Problems We See in San Francisco Homes
We have worked enough homes across Window Installation in San Francisco to know exactly what fails first and why. Here are the patterns we see repeatedly:
- Hidden sill rot behind intact paint. In fog-belt neighborhoods like the Outer Richmond and Outer Sunset, west-facing wood sills can rot completely through while the interior paint still looks fine. Moisture drives inward from outside, so the draft is the last symptom, not the first.
- Rusted steel casement hardware. Post-WWII Sunset and Richmond stucco homes carry original steel casements that seize shut and blister their coatings in salt-laden marine air. By the time the window will not open, the hinges and operating arms are usually beyond repair.
- Swollen jambs during humid months. San Francisco windows rack and bind from persistent humidity cycling, not heat expansion. A frame that fits fine in September can be difficult to open or close by January if the jamb and hardware were not specified for marine-grade moisture exposure.
- Historic review stalls. In the Western Addition, Castro, Haight-Ashbury, and Mission, the standard vinyl-swap approach stalls at the Planning Department. Homeowners who buy windows before checking their historic district status end up with units they cannot legally install.
Pricing for Window Installation in San Francisco, CA
A straightforward single-hung or double-hung replacement in a non-historic San Francisco home runs $900 to $1,600 per window. A casement window with marine-grade stainless hardware in a fog-belt neighborhood typically runs $1,200 to $2,600 per opening. A full Victorian or Edwardian retrofit with rough framing repair, historically compatible sash profile, and Planning Department review can reach $2,800 per window or more. What drives the price is the condition of the rough opening and the profile compatibility requirement, not the brand sticker on the unit. Every job gets a written line-item quote before any work starts, and the number on that page is the number on the final invoice. Call (562) 478-8017 to schedule a free estimate. Keith Yamada will walk the house with you and explain what the price covers bracket by bracket.
We Also Serve Cities Near San Francisco
Our crews are based in the San Francisco Bay Area and regularly serve homes in Daly City, Brisbane, Sausalito, and South San Francisco. The same marine-air material rules apply, and we bring the same written-price-before-work policy to every job. If you are just over the border but still fighting the fog, call us.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 Window Installation in San Francisco
Vinyl swapping is wrong in San Francisco’s historic districts because many Victorian and Edwardian row houses in the Western Addition, Castro, Haight-Ashbury, and Mission require Planning Department review before replacement, and the review mandates historically compatible window profiles that standard vinyl units cannot match. The vinyl swap also ignores the rot reality: original wood sash frames in fog-belt homes are often hiding structurally compromised rough framing that a direct replacement will not address. Call (562) 478-8017 if you are unsure which review path applies to your block.
Yes. Salt-laden marine air corrodes standard zinc and cheap stainless hardware within a few years, especially on west-facing walls in the Outer Richmond and Outer Sunset. We specify hot-dip galvanized or marine-grade stainless fasteners and hinges on every west-side install, which usually adds $40 to $90 per window but is the difference between a window that works for decades and one that seizes shut in five years. The coastal spec costs more up front and less within ten years.
You often cannot tell from inside the house, and that is the point. Interior paint can look intact while the sill and rough framing behind it are rotted through from the outside in. The reliable way to know is to remove the interior trim or probe the sill plate and rough opening, which is exactly what our crew does before we quote a replacement. Kevin asked the same question on an Outer Richmond job, and the answer was a sill plate we could crumble with a gloved hand.
Yes, they can be replaced with modern casement windows that keep the visual character of the home but use marine-grade stainless hardware and low-E insulated glass. The original steel casements corrode heavily in salt-laden air, seize shut, and blister their coatings. We swap them for units that do not rust into the frame within a decade, and we handle any profile compatibility with the city where it applies. A typical replacement runs $1,200 to $2,600 per window.
The coastal-spec install typically runs $200 to $400 more per opening than the inland-spec version, driven by marine-grade stainless hardware, specialized flashing and sealant, and the extra rough-opening work that fog-belt homes usually require. The inland spec saves money for about five to eight years, then the hardware corrodes, the jambs swell, and the repair bill doubles. Call (562) 478-8017 for a written coastal-spec quote, and we will show you exactly where each dollar goes.
Get Your Free Window Installation Estimate in San Francisco
We will walk the house with you, check for hidden rot, talk through the material options for your specific block and exposure, and put a fixed number in writing before any work begins. No invoice surprises, no change orders out of nowhere. Our crews treat your floors, furniture, pets, and kids’ sleep schedules with the same care we would if it were our own home. Call (562) 478-8017 today and ask for Keith Yamada.
Written by Keith Yamada, Owner at Lightwell Windows & Doors, serving San Francisco since 2010.