Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across San Dimas
If you’re searching for a General Contractor in San Dimas, you’re likely staring at a project that’s grown past the DIY stage, whether it’s a kitchen with a bad layout, a bathroom that needs more than tile, or a garage you’d rather see as a rental unit. We’re Mason Remodeling, and we’ve been running construction projects since 2004 as part of the Threshold Group family. We send background-checked, uniformed crews to San Dimas, and every homeowner gets the name and photo of each technician before they show up. Call (803) 680-2547 and you’ll reach a live person, not a phone tree. A written price lands in your hands before any tool gets unpacked.
Why Mason Remodeling Is San Dimas’s Preferred General Contractor Company
San Dimas homeowners deal with a specific set of construction realities that flatter, dense subdivisions don’t. Much of the older housing stock here sits on hillside and canyon-edge lots where rear yards drop away. That means retaining walls, drainage, and pier-and-grade-beam foundations routinely drive scope decisions before any finish work can be priced. A contractor who quotes cabinets and countertops without checking what’s under the floor is going to hand you a change order the size of a small car. We open walls and floors on scope day so your written price reflects what’s actually there, not what we hope is there.
Our reputation in San Dimas comes from doing exactly that, repeatedly. Homeowners tell us the same thing: the number we put in writing is the number they paid. That’s not a slogan. The Threshold Standard means every crew member is background-checked, identity-verified, arrives in a clean marked uniform, shows a photo ID badge at the door, and was introduced to you by name and photo before the visit. Written Price Before Any Work Starts is standard on every project. And our 365-Day Done Right Promise covers you for a full year from the completion date: if the work isn’t right, we make it right at no cost.
Dispatching for San Dimas is coordinated from the brand’s Los Angeles office, so scheduling is straightforward and crews arrive with the materials staged. You’ll get a realistic calendar before the first hammer swings, and you’ll meet the person running your job before they walk through your door. That matters when you’re home alone with kids, or when you’re older and want to know exactly who’s in your house.
Styles & brands we work with
Construction Company in San Dimas
As a Construction Company in San Dimas, we handle the structural and envelope work that most remodelers avoid: room additions, garage conversions, foundation repairs tied to hillside movement, retaining wall replacement, and full interior gut-and-rebuilds. A San Dimas homeowner usually calls us when the scope involves permits, load-bearing walls, or drainage, or when two or three trades need to sequence without stepping on each other. On hillside lots especially, the construction work has to get done right before anything cosmetic happens.
Room Additions on Sloped Lots
Adding square footage on a San Dimas hillside lot usually means pier-and-grade-beam work, which is more expensive than a slab-on-grade addition in flatter parts of LA County. A Home Addition in San Dimas runs $45,000 to $130,000 depending on foundation type, soil conditions, and whether the addition ties into the existing roof or gets its own. We pull permits, schedule inspections, and sequence the work so your family keeps living in the house while we build.
Garage Conversions and ADUs
Garage conversions in San Dimas run $30,000 to $80,000, and ADU construction runs $90,000 to $220,000. The range swings on whether the existing slab has proper footings, whether the garage was originally permitted, and what the city requires for parking replacement and fire separation. We verify the permit history early so you’re not surprised at resale or during a later inspection sign-off.
Remodeling Contractor in San Dimas
As a Remodeling Contractor in San Dimas, we run interior projects from the first demolition swing to the final punch list walk. Kitchen and bath remodels are our core, but we also handle whole-home interior updates, flooring, tile, cabinetry, and fixture replacement. San Dimas kitchens and bathrooms tend to live in 1950s through 1980s-era homes where plumbing, electrical, and subfloor conditions vary wildly from one block to the next. Pricing accordingly starts with what we find behind the drywall.
Kitchen Remodel Scope
A Kitchen Remodel in San Dimas runs $14,000 to $45,000. The spread depends on cabinet grade, countertop material, whether you’re moving plumbing or gas lines, and what the subfloor looks like once we pull the old flooring. Cabinet installation alone runs $4,000 to $13,000, and countertop installation runs $2,000 to $6,500. We price from written allowances with dollar caps, not vague “tile allowance” language that lets the number drift upward after you’ve made selections.
Bathroom Remodel Scope
A Bathroom Remodel in San Dimas runs $9,000 to $28,000. Small bathrooms run $5,000 to $12,000, walk-in shower installations run $4,500 to $12,000, and tub-to-shower conversions run $3,500 to $10,000. Hillside homes often have cast-iron drain lines from the original build. If yours are corroded or offset, that’s a line item we identify on scope day, not a surprise after demolition.
Trusted Brands We Service in San Dimas
We install and service specification-grade materials from manufacturers our crews trust: KraftMaid and Wellborn cabinetry, Cambria and Silestone surfaces, Kohler and Moen fixtures, plus GAF and CertainTeed roofing when a remodel touches the roofline. For San Dimas hillside projects, we also work with Sakrete and Dvele where foundation or pre-fab components make sense. Because we order directly through these partnerships, San Dimas customers aren’t waiting on big-box backorders or paying retail markup on parts. If a fixture arrives damaged or a cabinet door is defective, we handle the replacement, not you.
See the difference
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After
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AfterCommon General Contractor Problems We See in San Dimas Homes
- Hillside foundation surprises. Sloped lots with pier-and-grade-beam foundations hide settlement, cracked piers, and drainage problems that only show up when walls come open. We scope for these on day one, not after the cabinets are ordered.
- Unpermitted enclosed patios and room conversions. Many San Dimas homes have enclosed patios or converted garages that were never permitted. It surfaces at resale or when a city inspector signs off on unrelated work. We check permit history before we quote.
- Old cast-iron drain lines under slab foundations. 1960s-era builds often still run original cast-iron waste lines. If they’re cracked or bellied, that’s a scope item we flag during the walkthrough, with a dollar figure attached.
- Contractor allowances with no caps. A “tile allowance” with no dollar ceiling means the final invoice is a guessing game. Every allowance we write has a hard dollar cap, and you approve selections before the draw schedule moves forward.
Pricing for General Contractor in San Dimas, CA
| Project | San Dimas 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 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
What moves the number: foundation condition, plumbing age, whether permits need retroactive filing, material grade, and how much of the existing structure gets reused. Free estimate: call (803) 680-2547 and we’ll walk your San Dimas property, open the walls that need opening, and hand you a written price. No verbal ballpark that grows.
We Also Serve Cities Near San Dimas
Our crews work regularly in San Dimas and the surrounding foothill communities. The same written pricing and crew verification standards apply anywhere we send a team. You’ll find us in La Verne, Glendora, Covina, and Azusa as well, often on the same types of hillside homes that define this part of the San Gabriel Valley. If you’re one town over, call us anyway, the estimate is free and the price comes in writing.
Serving San Dimas, CA - Our Local Coverage Area
We’re based in the San Dimas 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 Dimas
Do I need a permit for a kitchen or bathroom remodel in San Dimas?
Yes, if you’re moving plumbing, electrical, or structural walls, you need a permit from the city, and in San Dimas, enclosed patios and garage conversions often need retroactive permitting if they were never pulled originally. We pull all required permits, schedule inspections, and close the permit card with a clean sign-off. Any contractor who tells you permits are optional is setting you up for a resale problem or a stop-work order. Call (803) 680-2547 and we’ll tell you exactly which permits your project needs before you sign anything.
Why do San Dimas hillside remodel quotes vary so much?
Because the lot itself dictates the structural scope. Hillside and canyon-edge properties often sit on pier-and-grade-beam foundations with retaining walls and drainage systems that get touched during an addition or conversion. One quote assumes the foundation is fine and skips it; another quote, like ours, opens the floor and prices what’s actually there. The higher quote usually comes from the contractor who scoped the work properly, not the one padding the bill. Ask every bidder what they found under the floor. We’ll tell you, in writing, with photos.
How long does a typical San Dimas kitchen or bathroom remodel take?
A kitchen remodel in San Dimas typically takes 6 to 10 weeks from demo to final inspection, depending on whether you’re moving plumbing or gas lines, and a bathroom remodel usually takes 3 to 5 weeks. Hillside foundation work, permit backlogs, or custom cabinetry can stretch that. We give you a written calendar before we start, and we update it if inspections shift. A contractor who won’t commit to a timeline in writing won’t commit to a price either. Call (803) 680-2547 for a project calendar tied to your specific scope.
What actually changes the price once construction starts?
Three things: hidden conditions behind walls or under floors, change orders you request after the contract is signed, and permit corrections the city requires mid-project. We handle the first one by scoping aggressively before we quote, so hidden conditions are rare, and when they appear, we show you photos and a price before we proceed. You control the second one. The third one is why we verify permit history on every San Dimas job before pricing. Every change order goes in writing. No verbal additions ever.
Can you handle a garage conversion or ADU in San Dimas?
Yes, we scope, price, permit, and build garage conversions and ADUs in San Dimas, including hillside lots where the foundation work is more involved. Garage conversions run $30,000 to $80,000, and ADUs run $90,000 to $220,000 depending on whether you’re converting an existing structure or building new, and what the soil and slope require. We verify the original permit status of the garage before quoting, because an unpermitted conversion can block your final inspection. Call (803) 680-2547 and we’ll walk your property and tell you what’s actually possible.
Written by Isaac Pruett, Owner at Mason Remodeling, serving San Dimas since 2004.
