Martinez Multifamily Exterior Siding & Windows Renovation

Re-siding or re-windowing an apartment complex, condo association, or a portfolio of rentals is a different job from a single-family exterior, and it needs a contractor who plans it that way. Bay Area Siding Company, a Larkspur-based siding and window contractor working throughout Contra Costa County, handles multifamily and commercial exterior renovation in Martinez — the coordination, the phasing around occupied units, the architectural consistency an HOA board answers for, and the code and fire compliance that has to hold across every building on the property. This page is written for property managers, HOA and condo boards, and apartment owners weighing that kind of project.

Planning a multifamily project? Call (415) 619-5167 or request a bid.

What changes at scale

The physics of siding and windows don't change from one unit to a hundred — but almost everything around the work does. A multifamily exterior lives or dies on planning:

• Tenant-occupied phasing. Residents stay in place while the work moves building to building and elevation to elevation. That means a sequence that keeps entries, walkways, and parking usable, advance notice to tenants, and daily site security and cleanup so people can live normally around an active job.
• Predictable scheduling. A board or manager needs a schedule they can communicate and hold to. We build a realistic sequence after walking the property, and we keep you and your residents informed as it progresses.
• Architectural consistency. For an HOA or condo association, uniformity across buildings isn't optional — colors, profiles, and trim have to match the governing documents and read as one property. We spec to that standard and document it.
• Long-term maintenance math. At portfolio scale, the material decision is a budget decision for years. A low-maintenance, durable envelope reduces the repaint-and-repair cycle across every unit — which is where much of the lifetime savings actually lives.

Material choices across many units

The same materials that suit a Martinez house apply here; the difference is that the choice compounds across every building, so durability and maintenance weigh more heavily:

• Fiber cement — noncombustible, rot- and pest-resistant, and color-stable under strong summer sun; the common choice where lifetime maintenance and fire performance both matter across a property.
• LP SmartSide engineered wood — a warm wood look at lighter weight, where the fire designation allows it.
• Vinyl and CertainTeed insulated lines — budget-conscious, low-maintenance options for the right buildings, including insulated vinyl that helps with summer heat.
• Window replacement across units — energy performance and consistent operation matter for tenant comfort and turnover. Compare brands on the window replacement hub: Anlin, Milgard, Andersen, Marvin, and Pella.

We'll lay out the trade-offs for your property's budget and standards rather than defaulting to one product.

Permits, energy code, and fire compliance across a property

Exterior work in Martinez is permitted through the City of Martinez Building Division (525 Henrietta Street), reviewed under the adopted California Building Standards Codes. On a multi-unit project the permitting and energy-code compliance scale up: window replacement is treated as an alteration under the state Energy Code, so Title 24 documentation is typically part of the submittal, and the required U-factor and SHGC values vary by climate zone and code cycle — we confirm the current numbers at permit time rather than assuming last cycle's.

Fire compliance is the piece that most often surprises owners, because it can vary within a single property. Cal Fire's 2025 Fire Hazard Severity Zone maps place zoned areas along Martinez's hillsides and Alhambra Valley edges, and where a parcel carries a High or Very High designation, California Building Code Chapter 7A can govern exterior wall assemblies and altered openings — generally steering toward noncombustible or ignition-resistant materials and multi-pane, tempered glazing. Whether it applies depends on each parcel's designation and the scope of work, so for a property near those edges we confirm the designations with the City before speccing across buildings. Chapter 7A attaches to specific assemblies and openings, not automatically to an entire complex.

How tear-off works on occupied buildings

The construction itself follows the same discipline as any quality re-side, done building by building: pull the old cladding, inspect the sheathing and substrate, confirm a sound water-resistive barrier, correct flashing at windows, doors, and penetrations, repair any concealed dry rot found, and install new siding or windows to the manufacturer's specification. The multifamily difference is in the choreography — keeping one building weather-tight and secure at the end of each day while residents come and go — not in cutting corners on the wall.

What drives the cost

Every property is priced after a walkthrough. The drivers at this scale: total square footage and unit count, the number of buildings and stories, the materials and window brands chosen, how much concealed substrate or dry-rot repair surfaces at tear-off, the phasing and access constraints of an occupied site, and whether any parcels require Chapter 7A fire-zone detailing. We can also structure the work in phases to fit a reserve study or budget cycle.

FAQ

Can you re-side or replace windows while our units are occupied? Yes — that's the norm for multifamily work. We phase the project building by building, keep entries, walkways, and parking usable, give tenants advance notice, and secure and clean the site daily so residents can live around the work.

How do you keep the look consistent across our HOA's buildings? We spec colors, profiles, and trim to your governing documents and confirm them with the board before ordering, so every building reads as one property. Consistency is part of the scope, not an afterthought.

Do fire-zone rules apply to our whole Martinez property? Not necessarily. Chapter 7A applies based on each parcel's Cal Fire designation and the scope of work, and a property near the hills or Alhambra Valley can have parcels that differ. We confirm the designations with the City before speccing across buildings.

Can the project be phased to fit our reserve budget? Yes. We can sequence buildings or elevations across budget cycles or a reserve study, so the work fits your funding rather than forcing it all into one year.

Request a bid for your Martinez property

Call (415) 619-5167 or request a bid. We'll walk the property, build a realistic phasing plan, confirm any parcel-specific fire and energy requirements, and price the work at the scale you're managing. See the wider Contra Costa County service area and finished exteriors in our project gallery; for single-building context, our Martinez siding replacement and window replacement pages cover the fundamentals.