Bay Area Siding Company installs replacement and new-construction windows for Oakland homeowners — from flatland bungalows to hillside houses in the fire zone. We are a Marin-based (Larkspur) siding and window contractor, and we handle the whole job: measuring, energy and glazing selection, permitting, removal, flashing and air-sealing, and the final walkthrough.

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

Signs it's time to replace your windows

Oakland has a lot of original single-pane wood windows still in service, and they usually announce themselves:

• Drafts and cold spots near the glass, even when the window is shut.
• Condensation or fog between the panes — a failed seal on a dual-pane unit that can't be repaired, only replaced.
• Sashes that stick, won't stay up, or won't lock — swollen wood, painted-shut frames, or worn balances.
• High heating bills driven by single-pane glass with no Low-E coating.
• Rot, soft frames, or water staining at the sill or surround.

If two or more of these sound familiar, replacement is usually the better long-term call than repeated patching.

What to look for in a replacement window

The three decisions that matter most:

• Energy performance. Look 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, so the units you choose need to meet the code in effect at permit time — your installer should confirm the current numbers rather than assume.
• Frame material. Vinyl, fiberglass, aluminum-clad wood, and aluminum each trade off cost, thermal performance, and appearance differently. Older Oakland homes with wood trim and detailing often look best with clad-wood or a frame profile that respects the original opening.
• Retrofit vs. new-construction. A retrofit (insert) install keeps the existing frame and is less invasive; a new-construction install removes the window down to the framing so flashing can be fully renewed — often the right choice where there's rot or water intrusion. 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.
2. Measure — precise field measurements for each opening.
3. Product & energy selection — glass package, frame, and finish chosen to meet Title 24.
4. Permit — Oakland requires a building permit for window replacement.
5. Removal & prep — old units out, openings inspected for rot or damage.
6. Install, flashing & air-seal — set level and plumb, flash and seal against water and air.
7. Finish & walkthrough — trim, caulk, operation check, and cleanup with you.

Oakland-specific things to know

Permits. The City of Oakland requires a building permit for window replacement in residential and commercial structures, and the city treats window replacement as an "alteration" under the Energy Code — which means a Title 24 energy compliance form (Oakland's CF1R for fenestration) is part of the submittal.

Fire-zone glazing (the hills). Much of the Oakland hills is a Very High Fire Hazard Severity Zone / Wildland-Urban Interface where the California Building Code's Chapter 7A governs exterior glazing. Per the City's WUI bulletin, when an opening is altered to install a window in a single-family home in the WUI, the window must be multi-paned with at least one pane of tempered glazing, in addition to other code requirements. Exact obligations depend on your parcel and whether the work is classed as a repair or an alteration, so it's worth confirming early — we handle that as part of scoping.

Older housing stock. Oakland's Craftsman, bungalow, and mid-century homes frequently still have their original single-pane windows, which makes the energy-and-comfort upgrade from a modern dual-pane, Low-E unit especially noticeable.

Already thinking about the exterior envelope? We also do James Hardie siding and siding replacement in Oakland, and we serve the wider East Bay. 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, frame material and brand, retrofit vs. new-construction, whether fire-zone tempered/multi-pane glazing is required, condition of the existing framing (rot repair adds scope), and access — upper-story or hillside openings take more setup.

Frequently asked questions

Do I need a permit to replace windows in Oakland? Yes. Oakland requires a building permit for window replacement, and a Title 24 energy form is part of the submittal. We handle the permitting.

I'm in the Oakland hills fire zone — do my windows need to be tempered? Likely, if the work is an alteration. In the WUI, altered openings generally require multi-paned glazing with at least one tempered pane under Chapter 7A. The exact requirement depends on your parcel and scope, which we confirm before ordering.

Can I keep the look of my older Oakland 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 home.

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