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 San Mateo
Hiring a general contractor in San Mateo means finding a team that understands Peninsula housing stock before the first permit is pulled. Most projects here are not clean new builds. They are remodels, additions, and second-story pop-ups on 1920s bungalows or 1950s ranch houses sitting on tight lots with real setback limits. Our team at Iron Beam Contractors runs those jobs end to end, from structural scope through finish work, with one point of accountability. Call (833) 756-5936 for a free estimate on your San Mateo project.
Why Iron Beam Contractors Is San Mateo’s Preferred General Contractor Company
We work the neighborhoods most remodels happen in: the numbered streets near downtown, the western ranch tracts, the hillside pockets where a second story changes a house completely. That local familiarity matters when a plan-check reviewer flags lot coverage or a neighbor raises a party-wall concern. We know what comes next because we have handled it in San Mateo already.
Our San Mateo customers count on us to coordinate trades, manage the permit set, and hold the timeline. Nolan Driscoll runs our jobs with an engineer’s eye for load path and a contractor’s habit of walking the site daily. When a crawlspace surprise appears, which it often does on pre-1940s bungalows, the change order is issued with a clear explanation and a revised schedule, not a shrug.
We carry the full scope: interior remodeling, exterior envelope work, outdoor construction, and ADU or prefab installation under one agreement. That means one contract, one schedule, and one team accountable for every phase. San Mateo homeowners tell us that is the difference between a project that finishes and one that drags.
Styles & brands we work with
General Contractor Services in San Mateo
General Contractor Services in San Mateo cover the full build cycle: demo, framing, rough-in, drywall, finish, and closeout. A San Mateo homeowner typically needs a general contractor when a project touches more than one trade, which is almost every kitchen, bath, addition, or ADU job here. Kitchen remodels in San Mateo run $14,000 to $45,000. Bathroom remodels run $9,000 to $28,000. Home additions start at $45,000 and can exceed $130,000 depending on foundation work and design review.
Full-Scope Remodel Management
We self-perform the critical path work and coordinate licensed trades for mechanical, electrical, and plumbing. On a San Mateo kitchen, that means cabinetry from KraftMaid or Wellborn, counters from Cambria or Silestone, and fixtures from Kohler or Grohe all specified and ordered before demo begins. No homeowner chasing a faucet across three vendors.
Permits and Plan Coordination
San Mateo plan check is thorough, and the city’s lot-coverage and setback rules are strict. We prepare the permit set, respond to reviewer comments, and schedule inspections so the draw schedule stays aligned with actual progress. For additions and ADUs, we also handle neighbor notification and Hillside design review when the property triggers it.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Construction Company in San Mateo
Hiring a Construction Company in San Mateo means putting a full project under one accountable team rather than brokering work out to disconnected subs. Our General Contractor team handles interior and exterior work, outdoor living, and prefab or ADU installation on one agreement. A garage conversion in San Mateo runs $30,000 to $80,000. ADU construction ranges from $90,000 to $220,000 depending on unit type, utility runs, and foundation scope.
Exterior Envelope Systems
San Mateo’s fog-cooled, damp marine air punishes siding, roofing, and decking that is not detailed correctly. We install roofing systems from GAF, CertainTeed, and Owens Corning, and we specify James Hardie siding where moisture resistance matters. Dry-in detail is not an afterthought here; it is the difference between a five-year envelope and a thirty-year one.
ADU and Prefab Delivery
We hold partnerships across Abodu, Dvele, Mighty Buildings, Boxabl, Plant Prefab, and Tuff Shed. That gives San Mateo homeowners a depth of ADU options most remodelers cannot offer, from panelized backyard units to fully prefabricated structures. We manage site prep, utility trenching, crane or delivery access, and the finish work to bring the unit online.
Trusted Brands We Service in San Mateo
One contractor, every phase, built on real brands and real standards. Our San Mateo projects specify from a portfolio of 50+ manufacturers, so homeowners never have to source materials on their own. Roofing systems from GAF and CertainTeed. Countertops from Cambria, Silestone, and Caesarstone. Windows and doors from PGT, Therma-Tru, and San Mateo ECO Window Systems service. Hardscape from Belgard and Techo-Bloc. Plumbing fixtures from Kohler, Moen, and Grohe. Because we work directly with these manufacturers, San Mateo customers get accurate lead times and warranty support without playing middleman.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Mateo Homes
- Pier-and-post foundations that move after a wet winter. Many downtown-flats bungalows sit on short piers over open crawlspace. Once damp soil heaves or settles, the subfloor shifts and a remodel that looked cosmetic becomes structural. We open the crawlspace before any load-bearing wall comes out and include a contingency line in the scope.
- Lath-and-plaster walls hiding outdated wiring. Homes built between 1920 and 1940 on the numbered streets often still have knob-and-tube or early cloth-wrapped wire behind plaster. Opening a wall without a plan for rewire stalls the job and creates a safety issue. We flag it during demo walkthrough.
- Narrow side yards and shared walls limiting access. Additions on tight San Mateo lots require staging in the driveway, written party-wall notice, and daily cleanup so the alley and the neighbor’s path stay clear. A quote that ignores access cost will not survive first week on site.
- Design review catching lot coverage late in permit review. The city enforces setback and lot-coverage rules strictly, and hillside or coastal-influenced overlays add another layer of review. We pull records and check zoning before plans go in, not after the reviewer’s redline comes back.
Pricing for General Contractor in San Mateo, CA
San Mateo pricing reflects the cost of labor, permit review, and the foundation realities of older Peninsula housing stock. Below are price ranges for the major project types we build here.
| Project Type | San Mateo Price Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
A home addition on a tight San Mateo lot typically lands on the higher end when the crawlspace reveals foundation work, when a second story triggers Hillside review, or when shared-wall notice adds schedule time. ADU cost swings with utility trenching distance, prefab vs. panelized, and whether you choose a unit from Abodu, Dvele, or a site-built design. Every estimate includes a written line-item breakdown, and the quote we give is the price we build to unless the site reveals a condition no plan could have shown. Call (833) 756-5936 to schedule a free estimate.
We Also Serve Cities Near San Mateo
We run jobs across the Peninsula from San Mateo south through Foster City, Belmont, and Hillsborough, plus Highlands-Baywood Park. For homeowners in those areas, the same team, the same brand portfolio, and the same permit-first process applies. Call (833) 756-5936 and tell us which city your project is in.
Serving San Mateo, CA — Our Local Coverage Area
We’re based in the San Mateo 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 San Mateo
Yes, and it should. A narrow side yard means staging moves to the driveway or front yard, material lifts replace walk-in deliveries, and shared-wall work triggers written notice to the adjacent owner. On a San Mateo numbered-street lot with a few feet between houses, access cost is real, so we include it as a line item, not a surprise. Call (833) 756-5936 and we will walk the site before quoting.
Because pre-1940s bungalows in the downtown flats were built on short pier-and-post foundations over damp, shallow crawlspaces. A wet winter moves the soil, and a remodel that starts as a kitchen or addition reveals heaving, rot, or undersized piers once the subfloor comes open. We build a crawlspace inspection into every San Mateo scope and carry a contingency line so the foundation work is planned, not an emergency.
We submit the full permit set, respond to plan-check comments, and schedule every required inspection from rough-in through final. For shared-wall work, we provide written party-wall notice to the adjacent owner before demo or structural work begins, and we keep the inspection card current so the draw schedule tracks progress. Nolan Driscoll signs off on every phase.
We stage within the property line, work within San Mateo’s noise and work-hour rules, and clean the site daily. On a shared-wall lot we give written notice before framing or structural work, and we keep the alley and the neighbor’s access clear at the end of every day. A neighbor who feels informed files far fewer complaints than one who walks out to a blocked alley and a nail gun at 6:45 am.
We set real allowances for cabinets, counters, fixtures, and tile based on the brands you choose. San Mateo kitchens with KraftMaid or Wellborn cabinets, Cambria or Silestone counters, and Kohler or Grohe fixtures carry higher allowances than entry-tier specs. The draw schedule is tied to completed milestones, inspection sign-off, and visible progress. You pay for work that has been done, not work that is promised. Call (833) 756-5936 for a written example based on your project.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving San Mateo and the greater Peninsula. Your project deserves a general contractor, not a coordinator.