Bay Area Siding Company installs replacement and new-construction windows for Daly City homes — from the Doelger picture-window rows of Westlake to the hillside tracts and the blocks near Serramonte. We are a Larkspur-based siding and window contractor working across the Peninsula, and we handle the whole job: measuring, glass and frame selection, permitting, removal, flashing and air-sealing against wind-driven rain, and the final walkthrough. In a town this exposed to fog, wind, and salt, the seal around a window matters as much as the window itself.

Ready to move forward? Request an estimate or call (415) 619-5167.

Signs it's time to replace your windows

A lot of Daly City's postwar homes still carry their original single-pane windows — the wide picture windows Henry Doelger built into the Westlake tracts included. On the coast, a tired window announces itself quickly:

• Drafts and cold spots at the glass even when everything is latched, made worse by the steady ocean wind.
• Condensation or fog trapped between the panes — a failed seal on a dual-pane unit, which can only be replaced, not repaired.
• Water intrusion or staining at the sill or surround after a wind-driven rain — a sign the seal or flashing has given out.
• Corroded or seized hardware — salt air is hard on latches, balances, and tracks.
• Sashes that stick, won't stay up, or won't lock, from swollen wood or worn mechanisms.

If two or more of these sound familiar, replacement usually beats another round of patching — especially on the weather side of the house.

What to look for in a replacement window

Three decisions carry most of the weight:

• Energy and comfort. Dual-pane insulated glass with a Low-E coating cuts the drafts and the heat loss that single-pane picture windows leak all winter. California's Title 24 energy code sets maximum U-factor and SHGC values for replacement windows, and those numbers vary by climate zone and code cycle — so the units you choose need to meet the code in effect at permit time. Your installer should confirm the current figures rather than assume them.
• Frame material for a marine setting. Vinyl, fiberglass, aluminum-clad wood, and aluminum trade off cost, thermal performance, and corrosion resistance differently — and salt air is unforgiving of the wrong choice. On the coast, frame and hardware durability deserve as much thought as the glass.
• Retrofit vs. new-construction. A retrofit (insert) install keeps the existing frame and is less invasive; a new-construction install takes the window back to the framing so the flashing can be fully renewed — often the right call on a fog-belt home where there's rot or water intrusion around the opening. We do both.

Comparing brands? Start with our window hub at /bay-area-window-replacement/, then read the specifics for Anlin, Milgard, Andersen, Marvin, and Pella. We also install aluminum windows.

What to expect: our process

1. Consultation — we look at your existing windows, openings, and goals, and note the exposure on each elevation.
2. Measure — precise field measurements for every opening.
3. Product & energy selection — glass package, frame, and finish chosen to meet Title 24 and hold up to salt and moisture.
4. Permit — Daly City requires a permit and inspection for window replacement; we handle the submittal.
5. Removal & prep — old units out, openings inspected for rot or water damage.
6. Install, flashing & air-seal — set level and plumb, then flashed and sealed against the wind-driven rain and air infiltration a coastal wall sees.
7. Finish & walkthrough — trim, caulk, an operation check, and cleanup with you.

Daly City-specific things to know

Permits. Daly City requires a building permit and inspection to install or replace windows — and the City states this applies even to retrofit windows set into existing frames. Permits are issued to a homeowner doing their own work or to a California-licensed contractor carrying a current Daly City business license; the Building Division (650-991-8061) administers the process. As a window swap on an existing home, the work is treated as an alteration under the Energy Code, so a Title 24 compliance form is generally part of the submittal. We manage the permitting and the energy paperwork.

The coast is the design driver. Daly City is famous for its fog — the marine layer forms as the cold California Current chills ocean air that then pours inland, and the same coastal gap channels wind that drives rain sideways into walls and openings. That's why, on a Daly City job, the flashing and air-seal around the window get as much attention as the unit's rating. A high-performance window installed into a poorly sealed opening still leaks air and water; the two have to be done together.

Older housing stock. The Doelger-built homes of Westlake — the "little boxes" of the Malvina Reynolds song — and the surrounding postwar tracts frequently still have their original single-pane glass, including those signature picture windows. Swapping them for a modern dual-pane, Low-E unit makes the comfort and draft difference especially noticeable in a climate this cool and windy, and it's a chance to renew the weather-sealing on openings that were built decades before it was standard.

Already thinking about the exterior envelope? We also do James Hardie siding and siding replacement in Daly City, and we serve the wider Peninsula. See finished work in our project gallery.

What affects the cost

We don't quote prices online because every job is different. The drivers are the number and size of openings — those wide picture windows are their own line item; frame material and brand; retrofit vs. new-construction; the condition of the existing framing (rot repair around a leaky opening adds scope); the corrosion-resistant hardware and extra flashing detail a coastal elevation calls for; and access on a tight tract lot. We price it after we've measured.

Frequently asked questions

Do I need a permit to replace windows in Daly City? Yes. Daly City requires a permit and inspection for window installation or replacement, and the City notes this applies even to retrofit windows in existing frames. A Title 24 energy form is generally part of the submittal, and we handle the permitting.

Does Daly City's fog and wind change how windows should be installed? It does. Persistent marine moisture and wind that drives rain horizontally put more load on the flashing and air-seal than an inland site. We detail the opening for water arriving at an angle and specify hardware that stands up to salt air.

Can I keep the look of my Westlake picture windows? Yes. The wide picture-window look can be carried into a modern dual-pane unit, and frame material and profile can be matched to the original openings — vinyl, fiberglass, clad-wood, and aluminum each work depending on the home and the exposure.

Retrofit or new-construction install — which do I need? Retrofit is less invasive and keeps the existing frame; new-construction takes the window back to the framing and is the better choice where there's rot or water damage and you want the flashing fully renewed — common on the weather side of a coastal home. We assess and recommend.

Get started

Get replacement windows sized, specced, and sealed right the first time. Request an estimate or call Bay Area Siding Company at (415) 619-5167.