Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across San Lorenzo
Finding a General Contractor who understands San Lorenzo’s split housing stock changes everything about your remodel. Homes here fall into two very different camps: pre-1960 ranches on raised foundations and 1980s infill tracts with post-and-beam framing. Each one demands a different scope, different permits, and a different budget. Mason Remodeling has worked both types across San Lorenzo, and we give every homeowner a written price before a single tool gets unpacked. Call us at (803) 680-2547 to talk through your project.
What you need to know up front: a kitchen remodel in San Lorenzo runs $14,000 to $45,000, a bathroom remodel $9,000 to $28,000, and a home addition $45,000 to $130,000. Those ranges reflect what we actually see in San Lorenzo’s older ranches and newer tracts, not national averages. Every estimate is line-by-line, signed, and fixed before work starts.
Why Mason Remodeling Is San Lorenzo’s Preferred General Contractor Company
San Lorenzo homeowners tell us the same thing over and over: they want to know exactly who is walking through the door. That is why every Mason Remodeling crew member is identity-verified and introduced by name and photo before arrival. Your technician shows up in a clean marked uniform with a photo ID badge in hand. We call this the Threshold Standard, and it is how we have operated since 2004 as a Threshold Group company.
Isaac Pruett leads the team with a simple rule: no verbal estimates that mysteriously grow. You receive a written price before any work begins, and the 365-Day Done Right Promise covers every completed project. If something is not right within a year of the completion date, we make it right at no cost to you. That guarantee applies to kitchen remodels, bathroom remodels, room additions, and whole-home work across San Lorenzo.
Customers in San Lorenzo Village, along Hesperian, and in the tracts near Grant Avenue regularly mention two things in their feedback: the written quote held, and the crew left the site clean. We do not have a customer count or star rating to flash, but we do have a track record of returning to San Lorenzo homes for second projects. That is the reputation that matters.
Styles & brands we work with
General Contractor Services in San Lorenzo
General Contractor Services in San Lorenzo means managing the entire build from demolition to final inspection, so you are never juggling four subcontractors and a port-a-potty rental on your own. For a pre-1960 ranch near San Lorenzo Village, that often starts with opening a wall and finding something the original builder never intended you to see. Rot around a sink. Undersized wiring. A wall that was never supposed to be load-bearing. We handle the structural fix, the permit, the rough-in, and the finishes as one coordinated scope.
Kitchen and Bath Remodels
A full kitchen remodel in San Lorenzo runs $14,000 to $45,000. A bathroom remodel runs $9,000 to $28,000, with smaller baths falling between $5,000 and $12,000. These ranges include demolition, plumbing and electrical updates where the existing rough-in allows, cabinets, counters, and finish work. We install KraftMaid and Wellborn cabinetry, Cambria and Silestone countertops, and Kohler or Moen fixtures without you having to source anything yourself.
Room Additions and ADUs
San Lorenzo’s 5,000-square-foot lots leave some room for growth, and room additions run $45,000 to $130,000 depending on foundation type and roof tie-in. ADU construction starts at $90,000 and can reach $220,000 for a full detached unit with its own systems. Garage conversions fall between $30,000 and $80,000. We pull permits on all of it. Inspectors sign off before walls close.
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.
Construction Company in San Lorenzo
As a Construction Company serving San Lorenzo, we do more than hand you a bid and disappear for six weeks. We coordinate the trade sequence, schedule county and local inspections, and keep you informed when a rough-in passes or a delivery lands. On a 1950s ranch off Hesperian near the San Lorenzo Village core, we opened up a galley kitchen and found the subfloor soft around the sink from a decades-old slow leak plus a load-bearing wall where the homeowner wanted a pass-through to the dining room. We pulled a permit before framing, had our inspector sign off on the new header after the rough-in, and rebuilt with KraftMaid cabinets and a Cambria island top. Final punch list cleared in one walkthrough.
Whole-Home Coordination
When a project touches structure, plumbing, electrical, and finish surfaces at once, the value of one responsible party is obvious. We carry the schedule, the permit file, and the change-order log. If something moves in price, you see it in writing before it moves in the field. No surprises at the end of the month.
Deck and Hardscape Work
San Lorenzo’s mild, dry summers mean outdoor living gets real use. Deck construction and paver patios are common requests. Paver patio installation runs $3,500 to $11,000. If you are comparing bids, ask whether the paver base includes compaction and edge restraint. We spec Belgard and Unilock products, and our written quote includes the full base detail so you can compare apples to apples.
Trusted Brands We Service in San Lorenzo
Mason Remodeling works with specification-grade material partners so San Lorenzo homeowners get professional product lines without chasing supply houses themselves. We regularly install KraftMaid and Wellborn cabinetry, Cambria and Silestone surfaces, and Kohler, Moen, and Toto fixtures. On outdoor projects we use Belgard and Unilock hardscape materials. Some San Lorenzo owners building detached units have asked about prefab systems like Abodu and Dvele as an alternative to conventional ADU framing, and we are comfortable coordinating site work and utility connections around those systems when they fit the lot. Parts and replacement materials are sourced through our trade accounts, which means shorter lead times for San Lorenzo projects than a retail special order would get you.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Lorenzo Homes
- Load-bearing surprises in 1950s ranches. The galley kitchens and narrow baths common in San Lorenzo Village often hide structural walls where owners want open sightlines. Opening that wall means a beam, a permit, and an engineer’s letter before framing starts.
- Subfloor rot around kitchen sinks and bath fixtures. Decades-old slow leaks in raised-foundation homes soften the plywood before anyone sees the water stain on the ceiling below. We see this on Hesperian-area ranches regularly, and it is the most common reason a written quote gets a change order.
- Knob-and-tube wiring remnants. Homes built before 1960 in San Lorenzo sometimes still carry fragments of old wiring in walls and attics. When we open a wall, the inspector may require replacement before we close it back up. That is a code issue, not a preference.
- Shallow attic space in 1980s infill tracts. Post-and-beam construction from that era often leaves tight attic clearances, which complicates recessed lighting and duct runs. A kitchen remodel in those homes needs more planning around ceiling work than an older ranch does.
Pricing for General Contractor in San Lorenzo, CA
Here is what we quote for common scopes in San Lorenzo right now:
| Project | Typical Range in San Lorenzo |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Roof Replacement | $8,000 – $20,000 |
The single biggest cost driver in San Lorenzo is what we find behind the walls of a pre-1960 ranch versus what a 1980s tract home needs. Foundation type, subfloor condition, and whether existing plumbing and electrical can stay put all move the number. The second biggest driver is fixture and finish selection. KraftMaid cabinets with a Cambria countertop cost more than stock boxes and laminate, and the difference lands entirely inside the allowance you choose. We pin allowances before we write the contract, so the final number stays the final number unless you change something in writing. Call (803) 680-2547 for a free, itemized estimate on your San Lorenzo project.
We Also Serve Cities Near San Lorenzo
Our San Lorenzo crews also cover Castro Valley, San Leandro, Union City, and Oakland. If your project sits in one of those nearby communities, you get the same written-price guarantee and the same Threshold Standard crew verification we bring to every San Lorenzo job. Call the same number: (803) 680-2547.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Lorenzo
The structural truth of the house drives it. On a pre-1960 San Lorenzo ranch, you are almost certainly looking at a raised foundation, a load-bearing wall somewhere in the kitchen footprint, and subfloor that has absorbed decades of moisture around plumbing penetrations. A cosmetic kitchen with stock cabinets might stay near $14,000. The same square footage with a beam, subfloor replacement, updated wiring, KraftMaid cabinets, and Cambria surfaces lands closer to $45,000. The age of the structure, not the neighborhood look, sets the budget. Call (803) 680-2547 and we will walk your actual house, not a comparable on Zillow.
Yes, if you are moving plumbing, altering electrical, or touching any structural wall, an Alameda County permit is required and an inspector must see the work before it closes. Skipping the permit saves a little time now and creates a problem at resale disclosure or on the next buyer’s inspection report. We pull permits on every San Lorenzo project that requires one, and our written quote includes the permit line item. No change order later because someone decided to skip it.
A bathroom remodel in San Lorenzo typically runs four to six weeks. A full kitchen on an older ranch runs eight to twelve weeks, longer if structural changes or subfloor repairs come into play. Room additions and ADUs run four to eight months depending on foundation, roof tie-in, and utility work. We give you a calendar in the written estimate, and we hold to it unless an inspection or a material lead time forces a shift. If it shifts, you hear about it from Isaac directly, not from a voicemail.
A change order is a written document that records any change to the agreed scope and its price, signed by you before the work happens. In San Lorenzo, where opening a wall routinely reveals subfloor rot or unexpected framing, change orders are the difference between a clear project and a runaway bill. We never front-load a draw schedule before allowances are pinned down, and we never let a change happen in the field without paper in front of you first.
No, and you should be skeptical of any San Lorenzo contractor who says otherwise. A real remodel on a 1950s ranch or a 1980s infill home here starts with a scope walk, a written estimate, a permit application, and a materials order. That takes time, and cutting it short is how homeowners end up with a crew demoing before the financing or the permit is real. We start when the estimate is signed, the permit is issued, and the materials are confirmed. Call (803) 680-2547 to schedule the first walkthrough and get the process moving.
Written by Isaac Pruett, Owner at Mason Remodeling, serving San Lorenzo since 2004.
