







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Union City
Finding a general contractor in Union City means sorting through a lot of promises. Here’s the direct answer. A licensed general contractor in Union City coordinates your entire remodel or addition from first permit to final inspection, and typical project costs run from $9,000 for a small bathroom to $130,000 for a full home addition. We’re Mason Remodeling, led by Isaac Pruett, and we’ve built our reputation on one thing that matters more than any brochure: a written price before work starts. If you own a 1960s ranch in Decoto or a newer two-story near Union Landing, you need someone who knows both halves of this city’s housing stock. Call (803) 680-2547 to get your project scoped correctly from day one.
Why Mason Remodeling Is Union City’s Preferred General Contractor Company

Union City homeowners call us because we show up with a name, a face, and a number. Every crew member is background-checked, identity-verified, and uniformed, and you get that person’s name and photo before they walk through your door. That’s the Threshold Standard, and it’s how we operate on every job from a kitchen remodel off Alvarado-Niles Road to a room addition near Union Landing. Isaac Pruett runs our projects with the same care he’d give his own home, which is why our repeat business in Union City keeps growing.
We also understand the real reason remodeling falls apart around here: bidding from photos instead of opening walls. Older Decoto and Alvarado homes hide load-bearing surprises, and newer homes have their own quirks with HOAs and title-24 compliance. We price discovery honestly, not as a gotcha. Every Union City project gets a written line-item estimate, a draw schedule tied to inspection sign-offs, and a 365-Day Done Right Promise. If something isn’t right within a year of completion, we make it right at no cost to you.
Styles & brands we work with







Hire a General Contractor in Union City
Hire a General Contractor in Union City when your project touches structure, electrical, plumbing, or multiple trades at once. A kitchen remodel that moves a sink or a bathroom gut that exposes old cast iron pipe is not handyman territory. We pull permits with the City of Union City, schedule inspections, coordinate subs, and manage the entire build so you’re not playing phone tag with five different crews.
Full Project Scoping Before Any Demo
On our first visit we open access panels, check the crawlspace, and look for signs of unpermitted prior work, which is common in 1950s and 60s Decoto homes. We document what we find and adjust the written scope before you sign anything. You get a fixed number, not a ballpark that grows.
Permits Handled From Start to Finish
Union City requires permits for structural changes, electrical rough-ins, and plumbing moves. We pull them, schedule the inspections, and stand next to you at final sign-off. No open permits left behind at resale. That alone is worth the cost of a real general contractor.
General Contractor Services in Union City

General Contractor Services in Union City cover the full span of residential work, from a $9,000 small bathroom remodel to a $130,000 home addition. We scope the job, write the price, and manage the trades so the project finishes on schedule. If you’re adding square footage off the back of a 1980s two-story near Union Landing, or converting a garage into an ADU near James Logan High, you’re in the right place.
Kitchen and Bath Remodeling
Kitchens in Union City run $14,000 to $45,000 depending on whether you’re keeping the existing footprint or moving plumbing and walls. Bathrooms run $9,000 to $28,000. We write every line item, including tile, fixtures, and cabinets, before you sign.
Additions, ADUs, and Garage Conversions
A home addition in Union City runs $45,000 to $130,000, and an ADU costs $90,000 to $220,000 depending on whether you’re building detached or converting a garage. Garage conversions run $30,000 to $80,000 and often trigger the most questions about title-24 energy compliance. We handle all of it.
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.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Union City
We work with specification-grade cabinetry from KraftMaid and Wellborn, countertops from Cambria and Silestone, and fixtures from Kohler, Moen, and Grohe. When we’re deep in a Union City kitchen remodel, we don’t want to pause for parts. Our supplier relationships mean we can get KraftMaid cabinet faces or a Cambria slab template appointment moving faster than a general contractor sourcing retail. And because we carry these brands in our material allowances, your written price already includes real product, not a placeholder that gets upgraded later.
Common General Contractor Problems We See in Union City Homes
- Undersized or unpermitted prior work in Decoto and Alvarado homes. A 1960s ranch off H Street might have a load-bearing wall that was opened up twenty years ago with no permit. We find these before we bid, not after demo starts.
- Rot and termite damage in older crawlspace foundations. Union City’s clay soil and wet winters push moisture into raised foundations. A bathroom remodel often becomes a floor joist replacement once we open the subfloor.
- HOA approval delays in newer neighborhoods near Union Landing. If you live in a PUD, your exterior window or door changes may need architectural committee sign-off. We factor that into the schedule up front so it doesn’t stall your project mid-build.
- Sticker shock from vague allowances. A “contractor-grade” tile allowance that prices at $2 a square foot when you wanted a $9 a square foot porcelain. We write exact material allowances so your number doesn’t creep at the finish line.
See the difference
Before
After
Before
After
Before
AfterPricing for General Contractor in Union City, CA
| Project | Union City Price Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Small Kitchen Remodel | $9,000 – $20,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| 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 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Backsplash Installation | $800 – $2,500 |
| Kitchen Island Installation | $3,000 – $10,000 |
| Window Replacement | $4,500 – $15,000 |
| Roof Replacement | $8,000 – $20,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Paver Driveway Installation | $7,000 – $18,000 |
What moves these numbers? Discovery. On a Decoto home, opening a wall for a kitchen remodel can reveal a rotted sill plate, and that line item adds $1,500 to $4,000. Moving a plumbing stack in a slab foundation, common in 1970s Alvarado houses, adds $3,000 to $8,000. We write these as allowances and show you exactly what they cost. Call (803) 680-2547 to schedule your free estimate, and we’ll give you a written price before any work begins.
We Also Serve Cities Near Union City
Our crews work throughout southern Alameda County. We serve Union City and the surrounding communities of Fremont, Newark, San Lorenzo, and Castro Valley. If you’re searching for a General Contractor team that covers the whole area, we’re already working in your neighborhood.
Serving Union City, CA - Our Local Coverage Area
We’re based in the Union 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 Union City
Do I actually need a permit for a kitchen or bathroom remodel in Union City, CA?
Yes, if you’re moving plumbing, altering structure, or running new electrical, the City of Union City requires a permit and inspection. Swapping a faucet or replacing cabinet hardware does not. If you’re not sure, we’ll tell you honestly on the first visit. Call (803) 680-2547 and we’ll walk your project during the free estimate.
Why do two contractors quote my Union City kitchen remodel $20,000 apart?
Usually because one contractor bid from photos and the other walked the house. A Decoto kitchen with a load-bearing wall, rotted subfloor, or unpermitted prior work costs real money to fix, and the cheap bid either left that out or plans to hit you with a change order later. Our written price includes discovery so the number you sign is the number you pay.
How long does a typical general contractor remodel take in Union City?
A small bathroom runs about 3 to 4 weeks. A full kitchen remodel with structural changes runs 6 to 10 weeks. A home addition or ADU runs 16 to 26 weeks depending on weather and City of Union City inspection scheduling. We give you a calendar at contract signing, not a vague promise.
What is a draw schedule and how does it work on my project?
A draw schedule is how you pay for the work in staged amounts tied to completion milestones, not a lump sum up front. We invoice at specific points: after demo and rough-in inspections, after drywall and paint, and at final walkthrough. Each draw is tied to an inspection sign-off, so you only pay for work that has been checked and approved.
Can a general contractor here convert my garage into an ADU?
Yes, and it’s one of the most common projects we see in Union City right now. A garage conversion runs $30,000 to $80,000 depending on whether the slab needs leveling, the electrical panel can handle the new load, and the roof line needs structural work. We pull the permits and handle title-24 compliance. Call (803) 680-2547 to get a written quote.
Get Your Union City Project Priced Right

If you’re planning a remodel, addition, or ADU in Union City, start with a contractor who puts the price in writing before a single tool is unpacked. Mason Remodeling has served this city since 2004, and Isaac Pruett leads every project personally. Our crews are background-checked, our prices are fixed, and our work carries a 365-Day Done Right Promise. Call (803) 680-2547 to schedule your free estimate. A live person answers, around the clock, every day of the year.
Written by Isaac Pruett, Owner at Mason Remodeling, serving Union City since 2004.










