South San Francisco Window Installation & Replacement

Bay Area Siding Company installs replacement and new-construction windows for South San Francisco homeowners — from the postwar tracts on the slopes above El Camino to the older cottages of Old Town and the hillside houses under San Bruno Mountain. We're a Marin-based (Larkspur) siding and window contractor, and we run the whole project: measuring, glazing and frame selection, permitting, removal, flashing and air-sealing, and a final walkthrough with you.

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

Signs your windows are due

South City's steady wind and marine air have a way of exposing tired windows. The usual tells:

• Whistling or drafts around the sash on a windy afternoon, even with everything shut
• Fog or moisture trapped between the panes — a blown seal on a dual-pane unit, which can't be repaired, only replaced
• Sashes that stick, drop, or won't latch — swollen frames, painted-shut tracks, or worn balances
• Rooms that never quite warm up because the glass is single-pane with no Low-E coating
• Soft frames, rot, or water marks at the sill or surround, often where wind-driven rain finds a gap

Two or more of these together usually means replacement is the better long-term move than another round of patching.

What to look for in a replacement window

Three decisions carry most of the outcome:

• Energy performance. Aim for dual-pane insulated glass with a Low-E coating. California's Title 24 energy code sets maximum U-factor and SHGC values for replacement windows, and the numbers shift by climate zone and code cycle — so rather than quoting fixed figures, we confirm the current requirements at permit time and spec units that meet them.
• Frame material. Vinyl, fiberglass, aluminum-clad wood, and aluminum each balance cost, thermal performance, and appearance differently. On South City's wind-exposed walls, a well-sealed, rigid frame and good hardware are worth prioritizing; older homes with wood detailing often look best with clad-wood or a profile that respects the original opening.
• Retrofit vs. new-construction. A retrofit (insert) install keeps the existing frame and is quicker and less invasive; a new-construction install takes the window back to the framing so the flashing can be fully renewed — the right call where there's rot or past water intrusion. We do both and recommend based on what we find.

Comparing brands? Start at our window replacement hub, then read the specifics for 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 what you want to fix.
2. Measure — precise field measurements for every opening.
3. Product & energy selection — glass package, frame, and finish chosen to meet Title 24 as it applies at permit time.
4. Permit — South San Francisco processes window replacement through its Building Division; we handle it.
5. Removal & prep — old units out, openings checked for rot or hidden damage.
6. Install, flashing & air-seal — set level and plumb, flashed and sealed against wind-driven water and air.
7. Finish & walkthrough — trim, caulk, an operation check, and cleanup together.

South San Francisco specifics

Permits. Window replacement in South San Francisco runs through the City's Building Division (within Economic and Community Development), and windows are among the projects the City handles as over-the-counter permits alongside siding and re-roofing. California's Energy Code brings Title 24 documentation into fenestration permits statewide; we confirm the current requirements and prepare the submittal so it isn't on you.

Wind, fog, and comfort. South City is one of the windier spots on the northern Peninsula, and its marine setting means a lot of moving, damp air against the glass. That makes a properly air-sealed, dual-pane, Low-E unit noticeably more comfortable than the single-pane originals many homes still run — the draft-and-cold-spot problem is often as much about air-sealing as it is about the glass itself.

Fire-zone glazing near the open space. CAL FIRE updated the city's Fire Hazard Severity Zone maps in 2025, and parcels near San Bruno Mountain or the Sign Hill open space may carry a designation that brings California Building Code Chapter 7A into play — which can affect glazing (for example, tempered and multi-pane requirements on altered openings). Whether it applies to your home depends on the parcel and whether the work is a repair or an alteration, so we confirm early as part of scoping rather than assume.

Older tract stock. The postwar subdivisions — Buri Buri, Winston Manor, Westborough — and the older homes in Old Town frequently still carry their original single-pane windows, which makes the jump to a modern dual-pane, Low-E unit especially worthwhile here.

Doing the exterior envelope at the same time? We also handle siding replacement and James Hardie siding in South San Francisco, 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 home is different. The drivers are the number and size of openings, frame material and brand, retrofit vs. new-construction, whether a fire-zone glazing requirement applies to your parcel, the condition of the existing framing (rot repair adds scope), and access — upper-story and hillside openings take more setup. We price it after we've measured.

Frequently asked questions

Do I need a permit to replace windows in South San Francisco? Yes. The City processes window replacement through its Building Division, and it's handled as an over-the-counter permit alongside siding and re-roofing. A Title 24 energy component is part of the fenestration submittal, and we prepare it.

Will new windows actually cut the drafts in a windy spot like South City? Usually, yes — a big part of the draft problem is air-sealing, not just the glass. We remove the old unit, correct the flashing, and air-seal the opening, then set a dual-pane Low-E window, which together makes a real difference on a wind-exposed wall.

Am I in a fire zone that affects my windows? Possibly, if you're near San Bruno Mountain or the Sign Hill open space. CAL FIRE updated the city's Fire Hazard Severity Zone maps in 2025; whether Chapter 7A glazing rules apply depends on your parcel and whether the work is a repair or alteration, which we confirm before ordering.

Retrofit or new-construction — which do I need? Retrofit keeps the existing frame and is less invasive; new-construction takes the opening back to the framing so the flashing can be fully renewed, which is the right choice where there's rot or water damage. We assess and recommend.

Get started

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