Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across San Leandro
Most San Leandro homes were built between 1945 and 1975, which means a general contractor here deals with a very specific set of conditions: unpermitted prior additions, legacy wiring, and structural surprises that only show up after demolition. That’s what we plan for before we ever touch a wall. Mason Remodeling provides San Leandro Home Remodeling with licensed, insured general contracting across the city, from kitchen and bath remodels to whole-home additions, with a written price delivered before any work begins. We know the permit counter, we know the inspectors, and we know how to scope a San Leandro job honestly. Call (803) 680-2547 for a free estimate.
Why Mason Remodeling Is San Leandro’s Preferred General Contractor Company
San Leandro homeowners call us because we answer the phone, we show up when we say we will, and we put the price in writing before the first tool comes off the truck. Founded in 2004 as part of the Threshold Group family of home-service companies, Mason Remodeling holds every crew member to the Threshold Standard: background-checked, identity-verified, uniformed, and introduced to you by name and photo before they arrive at your door. You know exactly who is coming. That matters in San Leandro, where many of our clients are home alone during the day, have young kids, or simply want proof of who is stepping into their house.
Our reputation in San Leandro is built on the 365-Day Done Right Promise. If work is not right within a year of completion, we make it right at no cost to you. That’s not a marketing line. It’s a written guarantee with stated terms on every project. We also provide a free second visit if a repair or installation fails. No dispute process, no conditions.
Isaac Pruett leads our crew, and he has seen every complication a 1950s San Leandro ranch can throw at a remodel. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, with crews serving San Leandro locally. When you call, a live person answers. Not a call tree, not a voicemail loop. That’s true 24 hours a day, 7 days a week, including weekends and holidays.
Styles & brands we work with
General Contractor Services in San Leandro
General Contractor Services in San Leandro mean managing the entire scope of your remodel or addition, from the first structural assessment to the final inspection sign-off. A general contractor coordinates permits, schedules subcontractors, orders materials, and holds the job accountable to code and to your written price. In San Leandro specifically, that often means pulling records on the property first, because so many homes here carry unpermitted prior work that changes the scope once walls are opened. A full kitchen remodel in San Leandro typically runs $14,000 to $45,000. A bathroom remodel runs $9,000 to $28,000. Home additions range from $45,000 to $130,000 depending on foundation, roof tie-in, and structural requirements.
Kitchen and Bath Remodels
Older San Leandro homes often need more than new cabinets and tile. Knob-and-tube wiring, galvanized supply lines, and failed subfloor under the original vinyl are common discoveries. We scope for those realities up front, so your written price reflects what is actually likely to be inside your walls, not what a contractor hopes is there.
Additions and ADUs
Adding square footage in San Leandro means dealing with Alameda County Planning and the city’s building department on setbacks, lot coverage, and structural tie-in requirements. ADU construction here runs $90,000 to $220,000. We handle the drawings, the permit package, and the inspection schedule as one coordinated process.
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 Leandro
A Construction Company in San Leandro handles the structural and envelope work that remodelers often will not touch: load-bearing wall changes, foundation repairs, roof framing, and window and door replacement at the rough opening level. If your project involves moving a wall, cutting a new opening, or correcting an unpermitted addition, you are past handyman territory and into general contractor scope. In San Leandro’s 1945-1975 housing stock, that distinction comes up constantly. Window replacement here runs $4,500 to $15,000. Roof replacement runs $8,000 to $20,000. A garage conversion runs $30,000 to $80,000, and that figure assumes the slab, header, and electrical rough-in are sound. When they are not, and in this city they often are not, the scope grows honestly.
Structural Corrections
Older San Leandro ranchers and bungalows frequently have load paths that were altered decades ago without permits. Correcting a sagging header or a spliced floor joist is not optional. We pull the permit, open the wall, fix what is actually there, and get the inspector to sign off before we close anything back up.
Whole-Home Coordination
When a San Leandro homeowner wants to renovate a kitchen and bath while also rewiring the panel and replacing windows, one construction company should own the entire schedule. That’s the General Contractor role we fill. One written price, one point of contact, one inspection trail.
Trusted Brands We Service in San Leandro
Mason Remodeling works with specification-grade material partners including Cambria and Silestone for surfaces, and Kohler and Moen for fixtures. For structural and exterior work, we specify Abodu and Dvele where prefabricated components make sense for San Leandro additions and ADUs. We do not treat material selection as an upsell. You get access to vetted, professional-grade products at the same time you get your written price, so the numbers on the estimate reflect the actual finishes you want, not a placeholder allowance that inflates later.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Leandro Homes
- Unpermitted prior additions: A finished garage, a converted porch, an enclosed patio. San Leandro’s building records often do not match what is actually standing. We pull the record before we bid, then scope the correction honestly.
- Legacy wiring and plumbing: Knob-and-tube in the attic, aluminum branch circuits, galvanized supply lines. These are code issues the moment the wall is open. We include the rough-in correction in the written price when we can verify it, and we flag it as a probable allowance when we cannot.
- Slab and foundation surprises: Many San Leandro homes sit on slabs that were poured without modern vapor barriers or rebar. Exposing a slab for a bath or kitchen moves the scope. We price the likely scope, not the optimistic one.
- Contractors who skip permits: Some bidders leave the permit out entirely to keep the number low. The homeowner finds out at resale inspection. We pull permits on any structural, electrical, or subfloor work, always.
Pricing for General Contractor in San Leandro, CA
Honest San Leandro pricing starts with a written line-item scope, not a single lump sum with no breakdown. Here are the ranges we see most in this city, calibrated to Alameda County material costs and San Leandro permit fees.
| Project Type | San Leandro Price Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
What changes the price once work starts in San Leandro is almost always what is inside the walls: unpermitted framing, failed subfloor, obsolete wiring. That is why we budget allowances honestly and explain what a draw schedule looks like before you sign. You will never get a verbal estimate that grows on the final bill. You get a written price, and we hold to it unless the structure dictates a change, which we put in writing too. Call (803) 680-2547 for a free, written estimate on your San Leandro project.
We Also Serve Cities Near San Leandro
Beyond San Leandro, our crews cover San Lorenzo, Castro Valley, Oakland, and Alameda. If you are searching for a General Contractor team that understands the East Bay’s older housing stock, we bring the same written price and the same 365-Day Done Right Promise to every job. San Leandro remains our core service area, but we welcome calls from the neighboring cities as well.
Serving San Leandro, CA - Our Local Coverage Area
We’re based in the San Leandro 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 Leandro
A general contractor in San Leandro carries the license, insurance, and permit responsibility for structural, electrical, plumbing, and envelope work. A handyman can swap a fixture or patch drywall. A general contractor pulls the permit, schedules the inspections, and is legally accountable for code compliance on load-bearing work, which matters a great deal in this city’s older housing stock. Call (803) 680-2547 to discuss your scope.
A kitchen or bath remodel in San Leandro typically runs six to ten weeks once permits are issued. Additions and ADUs run four to eight months depending on foundation work, roof tie-in, and inspection scheduling with the city. We give you a written calendar before you sign, and we update it weekly. Call (803) 680-2547 for a realistic timeline on your specific project.
Because San Leandro’s 1945-1975 housing stock hides unpermitted prior work, legacy wiring, and subfloor failures that are invisible until demolition. A contractor who bids strictly off what they can see will issue a change order the day the wall comes open. Mason Remodeling pulls the building record first, budgets realistic allowances for hidden conditions, and writes the price so you understand what is firm and what is contingent before work starts.
Cabinets and a vanity replacement generally do not require a permit in San Leandro, as long as you are not moving plumbing, electrical, or walls. The moment you touch a load-bearing wall, relocate a supply line, or change a circuit, a permit is required. We handle that determination up front, in writing, as part of your General Contractor scope.
We start with the building record for your property, then walk the site with an eye toward the failure modes common in this city: slab conditions, legacy wiring, unpermitted prior work. We build the estimate as a line-item written price with clear allowances for the conditions we cannot verify until we open the walls. Then we explain exactly what would trigger a change order and what would not. Call (803) 680-2547 for a free estimate on your San Leandro remodel.
Contact Mason Remodeling today. Call (803) 680-2547 to schedule a free, written estimate for your San Leandro general contractor project. You will get a real person on the phone, and a real price in writing before any work begins.
Written by Isaac Pruett, Owner at Mason Remodeling, serving San Leandro and the East Bay since 2004.
