South San Francisco Multifamily Exterior Siding & Windows Renovation

Property managers, HOA boards, and apartment owners in South San Francisco hire Bay Area Siding Company for re-siding and window replacement on occupied buildings. We are a siding and window contractor based in Larkspur, and we plan multifamily work in phases. The goal is a finished envelope with the building staying livable while the work happens. We work on garden-style apartment complexes, condominium and townhome associations, and mixed-use or small commercial buildings. The first question is always the same: how do we get the exterior done without disrupting the people who live there?

Planning a capital project or collecting bids? Request a bid or call (415) 619-5167 to schedule a site walk.

Built around residents, not just the building

On a single-family re-side, the owner can plan around the crew. On an apartment building, dozens of households are living their normal lives on the other side of the wall. We sequence the job around that reality.

• Elevation-by-elevation phasing. We open, inspect, weather-protect, and re-clad one wall or building section before moving to the next. No side of the property sits stripped longer than it needs to.
• Unit-entry coordination for windows. Window replacement means entering units. California law generally requires advance written notice before a landlord's agents enter a tenant's unit (Civil Code §1954). We give management a schedule by unit and floor well ahead of time so notices go out correctly.
• Access, parking, and staging. Scaffolding, material drops, and dumpsters affect carports, walkways, and parking. We map those out with management before mobilizing and adjust the plan as phases move.
• Daily close-up. Every exposed wall is made weather-tight at the end of each day. This matters in a city where wind and marine moisture show up without much warning.
• A single point of contact. Boards and managers get one person to call for schedule changes, resident questions, and punch-list items.

Why South City exteriors wear the way they do

South San Francisco sits in a windy, marine-influenced stretch of the northern Peninsula. Summer tends to be the windiest season, and the air carries moisture and salt off the bay. We are not claiming this causes any particular failure in your building. It simply means a lot of pressure-driven weather hits the walls over the years.

On a large building, that exposure shows up in the maintenance log rather than in one dramatic failure. Typical signs include:

• Repaint cycles that are getting shorter
• Sealant joints that keep reopening
• Water complaints from specific units after storms

When those items keep returning, the building's envelope is usually ready for a replacement-level project. The deciding factors are the condition of the cladding, the water-resistive barrier (WRB), and the flashing at openings. The weather alone doesn't make the call.

That is why our scope usually includes tear-off rather than covering over the old siding. Removing the existing cladding exposes the sheathing, the WRB, and the flashing at windows, doors, decks, and penetrations. We can then document conditions, repair damaged sheathing where we find it, and install a continuous WRB with proper flashing before the new siding goes on. Framing is only exposed if the sheathing itself has failed and has to come off. That is a larger scope, and we flag it with a change-order discussion rather than assuming it.

Permits and code on multi-unit buildings

Permitting authority. Exterior work in South San Francisco goes through the City's Building Division, part of Economic and Community Development. The City lists re-siding and window replacement among the projects it can process over the counter. On multifamily and commercial properties, the building type, number of units, and scope can call for more review. We confirm the permit path with the Building Division for your specific property and handle the application and inspections.

Fire-resistance and wall assemblies. Depending on occupancy type and the distance from property lines, some multifamily exterior walls must meet fire-resistance-rated assembly requirements under the California Building Code. Any replacement cladding has to keep that assembly intact. We confirm this with the City during scoping instead of assuming a product swap is automatically equivalent.

Fire hazard zones. CAL FIRE issued updated Fire Hazard Severity Zone maps for South San Francisco in 2025, and the City is folding them into its code process. Properties near San Bruno Mountain and the Sign Hill open space are the most likely to carry a designation. If a designation applies, California Building Code Chapter 7A can govern specific assemblies and openings, such as exterior wall coverings and glazing. It does not govern "the whole building" as a blanket rule. Whether it applies depends on the parcel and the scope, and we verify it by address.

Energy code for windows. California's Title 24 energy standards apply to replacement windows. Performance requirements vary by climate zone and code cycle, and multifamily buildings can fall under different compliance paths than single-family homes. We confirm the current requirements at permit time and specify units that meet them.

Balconies and elevated elements. California's balcony-inspection laws (SB 721 for apartment buildings and SB 326 for condominium associations) require periodic inspection of exterior elevated elements. If an inspection report points to water intrusion where a deck or balcony meets the wall, it often makes sense to coordinate that repair with the re-siding scope. We can work alongside your inspector's findings and the required repair contractor.

Older buildings. Many buildings in the city predate 1978. Federal lead-safe work-practice rules apply to renovation of pre-1978 housing, and we factor that into scope and scheduling during planning.

Materials that make sense at portfolio scale

For boards and owners, material choice comes down to three things: first cost, maintenance budget over time, and appearance that stays consistent across every building.

• James Hardie fiber cement is noncombustible, dimensionally stable, and a common choice where fire-zone or rated-assembly questions are in play. The HZ10 line is the California product. ColorPlus factory finish carries a 15-year finish warranty, and the substrate carries a transferable 30-year non-prorated limited warranty when installed to spec. Both can help stretch repaint budgets.
• Fiber cement from other manufacturers is worth comparing when you're pricing options across the category.
• LP SmartSide is engineered wood. It gives a warm wood look and is lighter to handle, and it needs periodic painting.
• Vinyl and CertainTeed lines are budget-conscious options with no repainting, where the exposure and any code requirements allow them.

For windows, we install Milgard, Anlin, Andersen, Marvin, Pella, and aluminum units. Choosing one product family across all buildings keeps sightlines uniform and makes future replacement parts easier to source. See the window replacement hub for comparisons.

HOAs with architectural guidelines can get sample boards and color mockups for board review before a single elevation is opened.

What drives the cost of a multifamily project

We price each property from a site walk and a written scope rather than a per-unit number. The main cost drivers are:

• Total wall area and building height, which determine scaffolding and access needs
• Number and size of window openings, plus the choice between retrofit and full-frame installation
• Material and finish selection
• Condition of the sheathing once the old siding is off
• Number of phases needed to keep residents comfortable
• Code-driven items such as rated assemblies or fire-zone glazing
• Coordination with balcony repairs or other trades

Phasing can also match your reserve study or capital budget. Some associations do the worst-exposed elevations first and schedule the rest in later fiscal years.

How an engagement typically runs

The process has five stages:

1. Walk the property with management or the board.
2. Review problem areas from the maintenance history.
3. Deliver a written scope and bid with a phasing plan.
4. Handle permitting with the City.
5. Execute building by building, with regular updates and a final walkthrough and punch list for each phase.

You can see finished work in our project gallery.

FAQs

Can residents stay in their units during re-siding? Yes, in most cases. Siding work happens from the exterior and is phased one elevation at a time. Window replacement requires short, scheduled entry into each unit, and we coordinate the timing so management can give proper notice.

Does a multifamily re-side in South San Francisco need a permit? Yes. Exterior siding and window work is permitted through the City of South San Francisco's Building Division. Simple residential scopes often go over the counter, but larger multifamily or commercial projects may need more review. We confirm the path for your property and manage the application.

Our complex is near San Bruno Mountain. Do we need fire-rated materials? Possibly. CAL FIRE's 2025 map update affects some parcels near the open space, and Chapter 7A requirements attach to specific assemblies and openings based on the parcel's designation and the project's scope. We verify your address with the City before specifying products.

Can we spread the work over several budget years? Yes. We can divide the scope by building or elevation, which lets the project follow your reserve schedule and keeps each phase fully weather-tight when it's finished.

Get a bid for your property

South San Francisco owners, managers, and HOA boards can request a bid or call (415) 619-5167 to set up a site walk.

For individual residences, see our South San Francisco siding replacement and South San Francisco window replacement pages. We also serve the wider Peninsula.