Orinda homes are built around their views — canyon oaks, ridgelines, and the green hills of Lamorinda — and the glass is a big part of why. When it's time to replace windows here, two things tend to drive the whole project: getting the view-facing glazing right, and meeting the fire-zone glazing rules that apply on much of the town's wooded terrain. Bay Area Siding Company is a Marin-based siding and window contractor, and we handle the full replacement: measuring, glass and frame selection, permitting, removal, flashing and air-sealing, and a final walkthrough.

Planning a window project? Request an estimate or call (415) 619-5167.

The two decisions that shape an Orinda window job

Most window replacements in town come down to two questions before anything else:

How the view-facing glass should perform. Large view windows and slider-style openings gain and lose the most heat, so the glass package matters. A dual-pane insulated unit with a Low-E coating keeps a big south- or west-facing wall of glass from turning a room into a greenhouse in Orinda's hot, dry summers, while holding warmth through the wet winters. On picture windows framing a specific view, we also talk through sightlines and frame profile so the upgrade doesn't shrink what you're looking at.

Whether the opening is in a fire-hazard zone. Much of Orinda — north Orinda in particular — sits in state-mapped Very High Fire Hazard Severity Zone terrain served by the Moraga-Orinda Fire District. Where a parcel carries that designation, California Building Code Chapter 7A reaches exterior glazing: when an opening is altered to install a new window, the code generally calls for multi-pane glazing with at least one tempered pane, among other assembly requirements. The nuance that matters: 7A attaches to specific altered openings on designated parcels, and whether your work is classed as a repair or an alteration affects what applies — so we confirm your parcel and scope with the City of Orinda before ordering glass.

Energy code and the numbers that change

California's Title 24 energy code sets maximum U-factor and SHGC values for replacement windows, and window replacement is treated as an alteration that has to meet the code in effect at permit time. Those target numbers vary by climate zone and shift across code cycles, so rather than quote a fixed figure we confirm the current requirements when we pull the permit and spec units that meet them. For most Orinda homes that means a dual-pane, Low-E package — which also happens to be the comfort upgrade owners notice most on older single-pane houses.

Matching the frame to an older home

Frame material is where character and performance meet:

• Clad-wood suits Orinda's 1920s–30s Spanish, storybook, and custom homes where a wood interior and a durable exterior both matter.
• Fiberglass and vinyl offer strong thermal performance and low upkeep, and specific profiles sit well in mid-century and ranch openings.
• Aluminum has its place on certain contemporary hillside homes.

We'll match the profile to the original opening so a replacement respects the way the house was designed, not just the R-value.

Retrofit or new-construction install

There are two ways to set a replacement window, and the right one depends on the opening:

• A retrofit (insert) install fits the new unit into the existing frame. It's less invasive and works well when the frame and surrounding wall are sound.
• A new-construction (full-frame) install removes the window down to the rough opening so the flashing and water-resistive barrier can be renewed completely — the right call where there's rot, water intrusion, or fire-zone assembly work that has to be detailed correctly.

We do both, and we recommend based on what the opening actually needs after we look at it.

Comparing window brands

We install a range of lines and will match one to your home, exposure, and budget. Start at the window hub, then read the specifics for Anlin, Milgard, Andersen, Marvin, and Pella. We also install aluminum windows.

Permits and process

Window replacement in Orinda is permitted through the City of Orinda's Planning and Building Department, with a Title 24 energy compliance form part of the submittal; fire-zone parcels can carry added glazing requirements. We handle the permit and confirm what applies to your address.

The job itself runs: consultation and field measurement of each opening; glass, frame, and finish selection to meet Title 24; permit; removal and inspection of the openings for rot or damage; install with flashing and air-sealing set level and plumb; and a finish walkthrough with operation checks and cleanup.

What affects the cost

Prices aren't something we post online, because every home differs. The drivers are the number and size of openings, how much of it is large view glass, frame material and brand, retrofit vs. new-construction, whether fire-zone tempered/multi-pane glazing is required, the condition of the existing framing (rot repair adds scope), and access — upper-story and hillside openings take more setup.

Doing the exterior together

Windows often go in alongside cladding. If you're weighing the whole envelope, see Orinda siding replacement and Orinda James Hardie siding — the flashing between siding and windows has to be sequenced correctly, so it's worth planning them together. We serve the wider Contra Costa area, and you can see finished work in our project gallery.

Frequently asked questions

Do I need a permit to replace windows in Orinda? Yes. Window replacement is permitted through the City of Orinda's Planning and Building Department, and a Title 24 energy compliance form is part of the submittal. We handle the permitting.

My home is in an Orinda fire-hazard zone — do the windows need tempered glass? Likely, if the work is an alteration to the opening. On designated fire-hazard parcels, Chapter 7A generally requires multi-pane glazing with at least one tempered pane for altered openings, along with other assembly requirements. Whether it applies depends on your parcel and whether the work is a repair or an alteration, which we confirm before ordering.

Will new windows keep the character of my older Orinda home? Yes. Frame material and profile can be matched to the original openings — clad-wood, and specific vinyl, fiberglass, or aluminum profiles all work depending on the home's era and design.

Do you offer both retrofit and full-frame installs? We do. Retrofit is less invasive and keeps the existing frame; full-frame (new-construction) is better where there's rot or water damage or where the flashing needs to be fully renewed.

Get started

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