Bay Area Siding Company installs replacement and new-construction windows for San Carlos homeowners, from the flatter east-side neighborhoods down toward the bay to the hillside homes above Alameda de las Pulgas. We're a Larkspur-based siding and window contractor covering the Peninsula, and we own the whole job: measuring, glass and frame selection, permitting, removal, flashing and air-sealing, and the walkthrough at the end.

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

Signs your windows are due

Plenty of San Carlos homes — particularly the Craftsman bungalows and older stucco houses in White Oaks, Howard Park, and the streets around downtown — still run their original single-pane sashes. They tend to tell on themselves:

• A draft you can feel standing near the glass with the window latched shut
• Fog or moisture trapped between the panes, which means a failed dual-pane seal that can't be repaired, only replaced
• Sashes that stick, drop, or won't lock — swollen wood, paint-sealed frames, or worn balances
• Heating bills climbing behind bare single-pane glass with no Low-E coating
• Soft frames, rot, or water staining at the sill or surround

Two or more of these, and replacement usually pays off better than chasing repairs.

What to weigh in a replacement window

Three decisions carry most of the outcome:

• Energy performance. Look for dual-pane insulated glass with a Low-E coating. California's Title 24 energy code sets ceilings on U-factor and SHGC for replacement windows, and those numbers move with climate zone and code cycle — so rather than quote a fixed figure, we confirm the values in force at permit time and choose glass that meets them.
• Frame material. Vinyl, fiberglass, aluminum-clad wood, and aluminum each balance cost, thermal performance, and appearance differently. On San Carlos's older Craftsman and Spanish-style homes, a clad-wood or a frame profile that honors the original opening often looks right where a bare retrofit would not.
• Retrofit vs. new-construction. A retrofit (insert) keeps the existing frame and is less invasive; a new-construction install strips the opening to the framing so the flashing can be fully renewed — usually the call where there's rot or past water intrusion. We do both and recommend based on what the opening shows.

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

What to expect: our process

1. Consultation — we look at your existing windows, openings, and goals.
2. Measure — precise field measurements for every opening.
3. Product & energy selection — glass package, frame, and finish chosen to meet Title 24 at permit time.
4. Permit — San Carlos requires a permit and inspection for window replacement; we file it.
5. Removal & prep — old units out, openings checked for rot or damage.
6. Install, flashing & air-seal — set level and plumb, flashed and sealed; nail-fin units are inspected before the exterior trim goes back on.
7. Finish & walkthrough — trim, caulk, an operation check, and cleanup with you.

San Carlos-specific things to know

Permit and inspection. The City of San Carlos Building Division (600 Elm Street) requires a permit and inspection to install or replace windows and patio doors. Plans aren't needed for a like-for-like swap; they are once you add a new opening or enlarge an existing one, which brings framing and header details into play. The city runs on the current California Building Code, and the property owner or a licensed contractor can pull the permit — we handle it for you.

Flashing gets inspected. This is the San Carlos detail people miss: nail-on fin windows and patio doors must be inspected before the exterior trim is installed, so the inspector can confirm the unit is properly sealed and flashed against moisture. And when stucco is cut for a window — common on the city's older Mediterranean-style homes — a lath inspection is required before the scratch coat, with the stucco lath lapped correctly over the flashing. We sequence the work around those hold points rather than close a wall up early.

Egress and safety glazing. Every sleeping room needs an egress-compliant window or door, and the code sets minimum clear openings for it (roughly 5.7 square feet, with 24-inch minimum height and 20-inch minimum width, and a sill no higher than 44 inches). Safety glazing — tempered or laminated — is required near doors, tubs and showers, stairs, and low openings. If your replacement changes any of those conditions, we flag it during the walkthrough.

Older single-pane stock. Because so many San Carlos homes still carry their original single-pane windows, the jump to a modern dual-pane, Low-E unit tends to be felt right away — quieter rooms, fewer drafts, and steadier temperatures through the mild but damp Peninsula winters.

Thinking about the exterior envelope too? We also do siding replacement and James Hardie fiber cement siding in San Carlos, and we serve the wider Peninsula. See finished work in our project gallery.

What affects the cost

We don't post prices, because every job is its own animal. The drivers: the number and size of openings; frame material and brand; retrofit versus new-construction; whether safety glazing is triggered at particular openings; the condition of the existing framing (rot repair adds scope); whether stucco removal brings a lath inspection; and access — upper-story and hillside openings take more setup.

Frequently asked questions

Do I need a permit to replace windows in San Carlos? Yes. The City of San Carlos requires a permit and inspection to install or replace windows or patio doors. A like-for-like swap doesn't need plans; adding or enlarging an opening does. We handle the permitting.

What's this about a flashing inspection? San Carlos requires nail-on fin windows to be inspected before the exterior trim is installed, to confirm they're sealed and flashed correctly. On stucco homes, a lath inspection is also required before the scratch coat. We plan the schedule around both.

Can I keep the look of my older San Carlos home? Yes. Frame material and profile can be matched to the original openings — clad-wood and specific vinyl or aluminum profiles all work depending on the house and the era.

Retrofit or new-construction — which do I need? Retrofit is less invasive and keeps the existing frame; new-construction is the better choice where there's rot or water damage and you want the flashing fully renewed. We assess the openings and recommend.

Get started

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