Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Marin City
Marin City homeowners need a general contractor who understands what this hillside community actually requires. We schedule free estimates across the 94965 zip code, and we’re familiar with the unincorporated permitting path that every project here goes through. Glen Sorrento leads our team, and we answer calls directly at (833) 589-8103. Whether you’re planning a kitchen remodel on a 1940s bungalow or an ADU on a tight lot off Donahue Street, we’ll walk the site, assess what’s behind the walls, and give you a written scope of work before anything gets torn open.

Why Seaside Contractors Is Marin City’s Preferred General Contractor Company
We’ve worked on enough Marin City homes to know the patterns. The original WWII-era defense housing off Drake Avenue still has its original framing in places, and the later infill on the hillside comes with drainage and grade issues that flatland contractors never see. Being a true General Contractor team means we handle the structural work, the finishes, and the county paperwork under one roof. Homeowners here aren’t looking for a patchwork of subs. They want one number to call when the fog has done its work on a deck ledger or a retaining wall gives way after a wet winter.
Marin City sits in a fog-cooled pocket just north of the Golden Gate. That means persistent moisture against wood framing, mold in the crawlspace, and erosion on the downhill side of lots. We quote accordingly. When we give you a number for a bathroom or kitchen remodel in Marin City, that number already accounts for what we expect to find once walls are open. We’d rather prepare you for the real scope than surprise you later.
Styles & brands we work with







Licensed General Contractor in Marin City
A Licensed General Contractor in Marin City is the only person legally authorized to pull building permits, schedule inspections, and manage a project that crosses multiple trades on an unincorporated hillside lot. We hold that role. When you hire us for a home addition or a full remodel, we’re the single accountable party from the first site visit through the final Marin County inspection sign-off. That matters more here than in a city with its own building department, because every permit, geotech question, and drainage plan submission flows through the county’s unincorporated process.
Permit and Inspection Management
We pull the permits. We schedule the inspections. We stand on site while the county inspector reviews our work. For hillside lots off Cole Drive, that often means a geotechnical review and a drainage plan before a framing permit will even be issued. We have handled that sequence enough times to know which engineer to call and what the county wants to see in the submittal package.
Structural Repair and Fog-Damage Remediation
Marin City’s coastal fog does more damage than most homeowners realize. We open walls and find rot in load-bearing framing, especially where decades-old additions were flashed poorly. Rebuilding that framing to current code, with pressure-treated stock where moisture exposure is chronic, is core work for us. We don’t hide it in a vague allowance. We show it in the line-item estimate.
Residential General Contractor in Marin City
A Residential General Contractor in Marin City handles remodeling and repair work on existing homes, which is almost all of what happens here. This is not a new-build luxury market. It’s a working-class, long-tenured homeowner base keeping aging houses functional and safe. Our residential scope includes kitchen and bath remodels, whole-home renovations, room additions, garage conversions, and deck replacement. Typical Marin City kitchen remodels run $14,000 – $45,000. A bathroom remodel runs $9,000 – $28,000 depending on what’s behind the tile and whether we find framing rot once the shower walls are open.
Remodel Scope and Material Selection
We walk you through the choices. Kohler and Delta fixtures, Schluter waterproofing systems, American Standard tubs, Toto toilets. You’ll get specific recommendations matched to your house and budget, not a catalog. Our brand partnerships mean you can choose a higher tier in one category and value-engineer another without switching contractors. One contractor, every trade.
Deferred Maintenance and Weather Exposure
Decks, retaining walls, and rooflines on Marin City’s hillsides take a beating. Fog moisture feeds rot at ledger connections. Winter rain saturates clay soil and moves retaining walls. We scope these repairs like a general contractor should. That means we look at what’s happening below the surface before we give you a number, because replacing a deck board without fixing the ledger is just buying a year of time.

Trusted Brands We Service in Marin City
We spec materials through a portfolio of 50+ vetted brand partnerships, and for Marin City’s coastal conditions we lean on Schluter for behind-the-wall waterproofing, Delta for plumbing fixtures that hold up to mineral-heavy water, and American Standard for tubs and shower bases that fit older bathroom footprints. You won’t wait weeks for parts that matter. We keep common trim, valves, and waterproofing components stocked, and anything we have to order arrives before the crew schedules that phase of the work.
See the difference
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After
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After
Before
AfterCommon General Contractor Problems We See in Marin City Homes
- Fog-driven rot in load-bearing framing. We opened a rear wall on a steep bungalow lot off Donahue Street for a kitchen remodel and found the rim joist and subfloor gone soft where fog moisture had been feeding behind a decades-old addition. We rebuilt the framing with pressure-treated stock and documented the fix with the county before closing the walls.
- Hillside drainage overwhelming undersized retention. Lots that slope toward the bay move water fast in a wet winter. We regularly see retaining walls tilting and crawlspaces flooding because the original drainage was never sized for the actual runoff. Fixing it properly usually means a drainage plan and surface water management, not just a sump pump.
- Unpermitted work from earlier remodels. Marin City has a lot of original 1940s housing with later additions that were never permitted. When we open those areas for a remodel, the county discovers the unpermitted scope and everything stops. We help you get it legal, which usually means we bring the old work up to current code while we’re in there.
- Cheap bids that skip the county process. We hear it from homeowners who took a low bid and then watched the project stall. The contractor skipped the geotech review the county required. No geotech, no framing permit. No framing permit, no inspection sign-off. The homeowner is left with a open wall and a contractor who stopped answering. We don’t skip steps because the steps exist for a reason on these lots.
Pricing for General Contractor in Marin City, CA
Here’s what Marin City homeowners should expect to budget for common scopes. These are market-calibrated ranges for the 94965 area, factoring in the permitting path, hillside access, and the likelihood that older homes reveal hidden moisture damage once work begins.
| Project | Typical Marin City Range |
|---|---|
| Impact Window Installation | $8,000 – $25,000 |
| Window Replacement | $4,500 – $15,000 |
| Roof Replacement | $8,000 – $20,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
ADU work in Marin City runs higher than flatland Sausalito in part because of geotech and drainage requirements on hillside lots, plus the county’s unincorporated review timeline. A home addition off Cole Drive will nearly always need a geotech report before framing can start. Call (833) 589-8103 for a free estimate. We’ll give you a written line-item scope, and we’ll tell you honestly where your money needs to go.
We Also Serve Cities Near Marin City
Seaside Contractors handles general contracting across southern Marin. We serve Sausalito, Belvedere, Tiburon, and Chinatown with the same permit-driven approach we use in Marin City. If you’re across the 101 in Sausalito or up the hill in Belvedere, call (833) 589-8103. We’ll schedule a site visit and give you a straight scope.
Serving Marin City, CA — Our Local Coverage Area
We’re based in the Marin City area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About General Contractor in Marin City
Because Marin City is unincorporated, so there is no city building department. Every permit, inspection, and code enforcement action runs through Marin County’s Building and Safety Division. That changes the paper path, the review timeline, and sometimes the engineering requirements. A general contractor who works in Marin City regularly will already know which county desk to call and which documents the plan reviewer wants to see. Call us at (833) 589-8103 and we’ll tell you what your specific project will need before we quote it.
Many do, especially lots off Cole Drive and Donahue Street where the county’s plan checker will flag slope stability as a review trigger before a framing permit is issued. The geotech report evaluates soil bearing and slope movement potential. The drainage plan shows where surface water goes. Skip either one and the permit stalls. We include both in our scope when the lot dictates it, and we tell you that in the estimate instead of discovering it mid-project.
Marin County enforces wind-load requirements tied to exposure near the Golden Gate, and your insurer will ask for documented compliance if you ever file a wind or storm damage claim. Windows and roof systems should carry the design pressure ratings specified in the current California Building Code for your exposure category. We spec products that meet those ratings and we keep the documentation. A cheap bid that substitutes non-rated units will pass a casual glance and fail a claim review. Call (833) 589-8103 and we’ll review what your specific roofline and exposure require.
A compliant quote from us includes the Marin County permit fees, the drainage plan and geotech review when the hillside lot requires them, wind-load documentation on windows and roof assemblies, and real line items for the rot repair that fog-damaged framing will likely need once we open the walls. A cheap bid leaves those out, then the project stalls at permit review or the change orders start stacking up. We’d rather quote the real number up front. Estimates are free at (833) 589-8103.
Fog keeps wood damp for months, which accelerates rot at ledger connections, sill plates, and anywhere flashing was installed incorrectly. Winter rain moves water down slopes, which tests drainage and retaining walls. Any Marin City remodel should start with a moisture assessment of the existing framing, because what you can’t see is usually worse than what you can. We scope for that reality. Our quote includes the likely remediation, not just the cosmetic work you’ll see at the end.
Written by Glen Sorrento, Owner at Seaside Contractors, serving Marin City and southern Marin County.