Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterConstruction in Foster City, CA
Kitchen remodeling in Foster City runs $14,000 to $45,000 for a full project, and nearly every job here involves a house built between 1964 and the mid-1980s on engineered fill. The city’s tract housing stock is uniformly aging, with original cabinets, original plumbing, and slab foundations that have settled over decades of bay mud compression. Rowan Construction Group writes a flat, itemized price before any work starts, and our crews know what Foster City’s soil and moisture conditions do to a project. Call (470) 298-9650 to schedule a free estimate.
Why Foster City Homes Are Different
Foster City sits entirely on engineered landfill placed over San Francisco Bay mud during the 1960s and 1970s. That single fact changes how we approach every trade. The city carries some of the highest liquefaction hazard ratings on the Peninsula, and soft, compressible subgrade means slabs move, door frames rack, and hairline cracks appear in ways nearby San Mateo or Belmont homes simply don’t experience. On a kitchen or bathroom remodel, that settlement shows up as out-of-level floors and cabinets that pull away from walls. On an addition or ADU, it means deeper geotechnical review, stiffer engineering, and foundation designs that assume continued movement, not stability.
The lagoon system adds another layer. Nineteen miles of tidal waterways wrap through the city, keeping marine air and salt-laden moisture moving across nearly every parcel. We routinely find corroded metal fasteners, rusted flashing, and steel connectors that have degraded faster than the same components ten miles inland. High groundwater compounds the issue on any excavation or slab work. And homeowners near the lagoons face a permit reality most contractors don’t flag: any construction within 100 feet of the shoreline triggers Bay Conservation and Development Commission review on top of standard city permits. That adds weeks if it’s not planned for from day one.
Our Main Foster City Services
Beyond the five trades detailed below, Foster City homeowners call us most often about two exterior projects tied directly to the city’s soil and moisture conditions: fences that lean as fill settles, and driveways or patios that crack from slab movement and salt exposure.
Fence Installation in Foster City
Fence posts set into Foster City’s engineered fill need deeper footings and, in many cases, concrete collars to resist the slow settlement that tilts posts and separates panels within a few seasons. The lagoon-adjacent air also corrodes standard hardware quickly, so we specify galvanized or coated fasteners as a matter of course. Our Fence Installation in Foster City page covers material options, pricing, and what our crews document on every visit.
Driveway & Pavers in Foster City
Concrete driveways in Foster City crack along settlement lines faster than on stable native soil, and pavers give the slab the flexibility to move without failing. Salt-laden air also shortens the life of unsealed surfaces and standard edge restraints. We walk the existing grade, check for high groundwater signs, and write the base-prep scope into the quote before work begins. See Driveway & Pavers in Foster City for paver versus concrete costs and what a Foster City driveway replacement actually involves.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterKitchen Remodeling in Foster City
Kitchen remodeling in Foster City typically costs $14,000 to $45,000 for a full renovation, with smaller projects starting around $9,000. The homes here, nearly all built between 1964 and the mid-1980s, share the same aging layouts, original plumbing, and slab foundations that have shifted unevenly over bay mud, so most kitchens need leveling work before cabinets go in. Our full Kitchen Remodeling service page explains the written-price process, but the short version is this: we inspect, we measure, we write a flat number, and that number doesn’t move without a signed change order.
Cabinets & Countertops
Signs you need it
Cabinet doors that no longer align, drawer slides that bind, or countertops with delamination at the seams tell you the original 1970s or 1980s build has reached the end of its service life.
What it costs in Foster City
Cabinet installation runs $4,000 to $13,000 and countertop installation runs $2,000 to $6,500 in Foster City, with KraftMaid and Wellborn cabinets and Cambria or Caesarstone tops priced line by line in the written quote.
How we do it
We level the base cabinets on shims over the settled slab, set uppers on a laser line, then template and install countertops with seams positioned away from sink and stove cutouts.
Backsplash, Tile & Flooring
Signs you need it
Cracked grout lines, tiles that sound hollow when tapped, or moisture staining behind the sink indicate the original installation has failed and water is getting where it shouldn’t.
What it costs in Foster City
Backsplash installation runs $800 to $2,500 in Foster City, with tile and flooring quoted as a separate line item in the same flat written price.
How we do it
We pull the old surface, inspect the substrate for moisture damage from the lagoon air, install cement board where needed, then set tile with polymer-modified thin-set and seal all changes of plane.
What Kitchen Remodeling Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Full Kitchen Remodel | $14,000 - $45,000 |
| Cabinet Installation | $4,000 - $13,000 |
| Countertop Installation | $2,000 - $6,500 |
How much does a kitchen remodel cost in Foster City?
A full kitchen remodel in Foster City runs $14,000 to $45,000. Small or partial remodels start around $9,000. The spread depends on cabinet grade, countertop material, and how much slab leveling the existing floor needs. Call (470) 298-9650 for an exact written quote.
Does Foster City’s soil affect kitchen remodeling?
Yes. The engineered fill under Foster City settles unevenly, which means floors are rarely level, and original cabinets installed in the 1970s and 1980s have often pulled away from walls or racked out of square. We inspect and correct for that before installation. Call (470) 298-9650 for a free estimate.
Bathroom Remodeling in Foster City
Bathroom remodeling in Foster City runs $9,000 to $28,000 for a full renovation, with smaller baths starting around $5,000. The homes here were built in the same 1964 to mid-1980s window, so original cast iron drains, failing tile membranes, and slab settlement under the shower pan are common. Our Bathroom Remodeling page details the process; every Foster City bathroom quote includes a written scope and a written warranty before tools come out.
Walk-In Showers & Shower Remodeling
Signs you need it
Loose tiles, persistent mildew at the curb, or water staining on the ceiling below the bathroom mean the shower pan or membrane has failed.
What it costs in Foster City
Walk-in shower installation runs $4,500 to $12,000 and shower replacement runs $3,000 to $8,500 in Foster City, with waterproofing specified as a separate line item.
How we do it
We demo to the studs, level the floor over the settled slab, install a bonded waterproof membrane from floor to ceiling, then set tile and a new drain assembly with a 24-hour flood test documented in the photo record.
Tub-to-Shower Conversion
Signs you need it
A cast iron tub from the 1970s that’s chipped, rusting at the drain, or simply unused is the clearest sign a shower conversion will add usable space and remove a maintenance point.
What it costs in Foster City
Tub-to-shower conversion runs $3,500 to $10,000 in Foster City, depending on whether the existing drain location works or the slab needs cutting.
How we do it
We remove the tub, inspect the sub-slab plumbing for corrosion, adjust the drain to a shower-compatible configuration, then waterproof and tile the new footprint.
What Bathroom Remodeling Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Full Bathroom Remodel | $9,000 - $28,000 |
| Walk-In Shower Installation | $4,500 - $12,000 |
| Bathroom Vanity Installation | $800 - $3,000 |
How much does a bathroom remodel cost in Foster City?
A full bathroom remodel in Foster City runs $9,000 to $28,000, with small baths starting around $5,000. Waterproofing, drain relocation, and slab leveling are the big variables. Call (470) 298-9650 for a written line-item quote.
Why do Foster City bathrooms fail early?
Salt-laden lagoon air corrodes metal plumbing and fasteners, while bay-mud settlement cracks grout and separates tile from substrate. Both conditions let water behind surfaces where it does hidden damage. We document what we find with photos. Call (470) 298-9650 to schedule a free estimate.
Roofing in Foster City
Roof replacement in Foster City runs $8,000 to $20,000 for a typical tract home, with repairs running $400 to $1,800. The city’s persistent marine air and salt-laden moisture corrode flashing, fasteners, and steel connectors faster than inland Peninsula cities, while roofs on 1960s to 1980s homes are now on their second or third layer. Our Roofing page covers materials and process; every Foster City roofing quote includes the shingle layer count and the condition of the existing decking in writing.
Roof Replacement & Installation
Signs you need it
Curling or missing shingles, visible rust on flashing, granule loss in gutters, or decking softness in the attic tell you the roof has passed its service life in this salt-air environment.
What it costs in Foster City
Roof replacement runs $8,000 to $20,000 in Foster City, with GAF and Owens Corning shingle systems quoted as complete assemblies, not just shingle cost.
How we do it
We strip to the sheathing, inspect for rot from two decades of marine exposure, replace damaged decking, install ice and water shield at all changes of plane, then lay the new system with corrosion-resistant fasteners rated for coastal air.
Roof Repair
Signs you need it
Water staining on ceilings after rain, missing shingles after winter storms, or visible rust trails down from flashing mean a repair is needed before decking decay spreads.
What it costs in Foster City
Roof repair runs $400 to $1,800 in Foster City, depending on whether the issue is a few shingles or corroded flashing that needs replacement across a whole slope.
How we do it
We locate the leak source, remove the damaged material, inspect the decking beneath, replace flashing or shingles with salt-rated components, and photograph the repair before and after.
What Roofing Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Roof Replacement | $8,000 - $20,000 |
| Roof Repair | $400 - $1,800 |
| Metal Roof Installation | $15,000 - $40,000 |
How much does a roof replacement cost in Foster City?
A roof replacement in Foster City runs $8,000 to $20,000 for a typical tract home. The range depends on decking condition, shingle grade, and whether the home needs tear-off of one or two existing layers. Call (470) 298-9650 for an exact written quote.
Does salt air really damage roofs in Foster City?
Yes. The city’s tidal lagoon system keeps salt-laden moisture in the air year-round, which corrodes metal flashing and fasteners measurably faster than inland Peninsula locations. We specify coastal-rated components on every Foster City roof. Call (470) 298-9650 to schedule a free estimate.
Windows & Doors in Foster City
Window replacement in Foster City runs $4,500 to $15,000 on a typical single-family home, with impact-rated windows running $8,000 to $25,000. Houses built between 1964 and the mid-1980s mostly have original aluminum-framed sliders that lose seals, corrode in the lagoon air, and let bay wind through gaps that have widened as the framing settled. Our Windows & Doors service page explains materials and options; every quote includes the written condition report on existing frames before we propose replacement.
Window Replacement
Signs you need it
Condensation between glass panes, visible aluminum frame corrosion, or windows that no longer close squarely against their sashes mean the seals and frames have degraded beyond repair.
What it costs in Foster City
Window replacement runs $4,500 to $15,000 in Foster City, depending on the number of openings and whether the frames have racked from settlement and need shimming.
How we do it
We measure each opening individually because Foster City’s settled frames are rarely square, order units to the measured dimensions, remove the old frames, square the rough openings with shims, and install with marine-grade flashing tape.
Impact Windows & Doors
Signs you need it
Homes facing open water or the widest lagoon channels take direct wind and salt load, and original sliders offer minimal resistance to either.
What it costs in Foster City
Impact window installation runs $8,000 to $25,000 in Foster City, with the spread driven by opening count, glass package, and frame material specified in the written quote.
How we do it
We spec the glazing and frame combination for the exposure, remove the old units, inspect the surrounding sheathing for salt-driven rot, then install and flash the new assemblies to the manufacturer’s published detail.
What Windows & Doors Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Window Replacement | $4,500 - $15,000 |
| Impact Window Installation | $8,000 - $25,000 |
| Door Installation | $800 - $3,000 |
How much does window replacement cost in Foster City?
Window replacement in Foster City runs $4,500 to $15,000 for a typical home, and impact-rated windows run $8,000 to $25,000. Frame condition and opening squareness drive the final number. Call (470) 298-9650 for a free estimate.
Will Foster City’s settlement affect new windows?
It can. Settled slabs and racked framing mean rough openings are often out of square, so we measure every opening individually and shim before installation rather than forcing units into place. Call (470) 298-9650 to schedule a written quote.
Home Additions & ADU in Foster City
Home additions in Foster City run $45,000 to $130,000, while attached or detached ADUs run $90,000 to $220,000. The engineered fill that underlies the entire city means every addition and ADU here needs geotechnical input, stiffer framing, and foundation systems designed for continuing settlement, not just today’s loads. Our Home Additions & ADU page covers the process from design through permit to final inspection, with the written price fixed before any work begins.
ADU Design & Permitting
Signs you need it
A homeowner with a large lot, a garage with unused space, or a multigenerational housing need is the typical Foster City ADU candidate, and the city’s BCDC review layer makes early design work essential.
What it costs in Foster City
ADU construction runs $90,000 to $220,000 in Foster City, with design and permitting carried as a separate line item in the written scope.
How we do it
We survey the lot, check the BCDC jurisdiction line if the parcel is within 100 feet of a lagoon, run the geotechnical analysis, then draw and permit the ADU with a flat price attached before site work starts.
Garage Conversion ADU
Signs you need it
An attached garage that doesn’t get used for parking, in a home built on a slab that’s already shown how it settles, is the most cost-effective ADU envelope in Foster City.
What it costs in Foster City
Garage conversion runs $30,000 to $80,000 in Foster City, with the spread driven by whether the existing slab passes its geotechnical review and what utilities need upgrading.
How we do it
We inspect the existing slab for settlement cracks, test the drainage and sewer lines, then convert the envelope with new insulation, electrical, and a conditioned floor system matched to the existing structure.
What Home Additions & ADU Costs in Foster City
| Item | Typical range in Foster City |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
How much does an ADU cost in Foster City?
An ADU in Foster City runs $90,000 to $220,000, with garage conversions starting around $30,000. Soil conditions and BCDC review timelines are the biggest variables. Call (470) 298-9650 for a written quote.
Does Foster City require special permits for ADUs?
Yes. Any construction within 100 feet of a lagoon shoreline requires BCDC review in addition to standard city permits, which can add weeks if not filed upfront. We handle that layer in the initial scope. Call (470) 298-9650 to schedule a free estimate.
Brands We Service in Foster City
We install and service prefabricated and modular systems from Abodu, Cover, Dvele, and Mighty Buildings for Foster City ADU projects where off-site construction speeds the timeline. Parts and panels are stocked locally through our Bay Area suppliers, and standard components arrive within days, not weeks. See our brands page for the full list of fifty-plus vetted material partners.
Pricing for Construction in Foster City, CA
| Service | Typical range in Foster City |
|---|---|
| Kitchen Remodeling | $14,000 - $45,000 |
| Bathroom Remodeling | $9,000 - $28,000 |
| Roof Replacement | $8,000 - $20,000 |
| Window Replacement | $4,500 - $15,000 |
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Paver Driveway Installation | $7,000 - $18,000 |
| Fence Installation | $3,500 - $9,000 |
| Garage Conversion | $30,000 - $80,000 |
| Tub-to-Shower Conversion | $3,500 - $10,000 |
Prices in Foster City push higher when a project requires slab leveling over settled bay mud, BCDC review near the lagoons, or salt-rated hardware upgrades. Every Rowan quote is a flat written price with a written scope, and no change proceeds without a signed change order. Call (470) 298-9650 for a free estimate.
Neighborhoods We Serve in Foster City
We work across all of Foster City’s residential pockets, from the lagoon-front homes to the interior tract blocks. Our crews are local to the area and typically reach a Foster City job site within a day of scheduling, with the written quote delivered before any work begins.
- Dolphin Bay
- Promontory Point
- Whale’s Tail
- Beach Park Boulevard area
- Edgewater
Service Area - Cities Near Foster City
Rowan Construction Group serves Foster City and the surrounding Bay Area, with crews dispatched locally from our San Francisco Bay Area office. If you’re researching contractors in a nearby market, we also serve San Jose, CA, San Francisco, CA, Los Angeles, CA, and San Diego, CA. Call (470) 298-9650 to schedule a free estimate at your Foster City home.
Serving Foster City, CA - Our Local Coverage Area
We’re based in the Foster 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 Construction in Foster City
We typically schedule Foster City estimates within a few days of your call, and most projects can start within a few weeks of the signed written quote. BCDC review near the lagoons can add weeks to permit timelines, and we factor that into the schedule upfront. Call (470) 298-9650 to get on the calendar.
Many Foster City condos and townhome associations have architectural review processes for exterior work, including windows, doors, and roofing. We prepare the documentation your HOA needs, and the written quote includes whatever the association requires. Call (470) 298-9650 for a free estimate.
Every visit ends with a documented photo record showing what we found and what we did, plus the signed change orders and the written warranty. That record is part of every Foster City project, not an add-on. Call (470) 298-9650 to schedule your free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local construction pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Foster City Customers Say
"Final invoice was within two percent of the contract. Every change was priced and signed before anyone picked up a tool."
- Malcolm T."Fence and retaining wall along a sloped boundary. They photographed the footing depth at each post, which mattered when the county inspector came."
- Iona F."Talked us out of the larger scope we came in asking for, because it would not have added the value we thought."
- Emil R.