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 Placentia
Most Placentia homeowners don’t need a contractor who builds from dirt. They need one who can thread a remodel, addition, or ADU onto a 1920s lot without tripping over setbacks, footings, or a citrus-root-damaged driveway that nobody priced. That’s the work we do. Square One Builders has managed full-scope residential projects across 92870 and 92871, from knob-and-tube panel swaps to whole-kitchen teardowns to detached-garage ADU conversions near the old Packing House district. Call (877) 688-9930 and we’ll put a written scope in front of you before you spend a dollar on demolition.
Why Square One Builders Is Placentia’s Preferred General Contractor Company
Placentia isn’t Yorba Linda. The lots are narrower, the homes older, and nearly every job starts by discovering what’s under the floor, not over it. Our team has worked the central core long enough to know that a 1948 detached garage on shallow footings is a different animal than a 1978 attached two-car. That local knowledge changes how we quote, how we sequence, and how we keep change orders honest.
Homeowners looking for a Placentia PGT service call us because we carry the whole scope under one contract: roofing, windows, cabinetry, countertops, plumbing, hardscaping, and ADU construction. Brent Calloway, who leads Square One Builders, built the company around the idea that a remodel fails when three different trades point fingers at each other. One contractor, every system. When a Placentia homeowner asks who’s accountable for the rough-in inspection, the answer is always us.
We spec materials from 50+ vetted brands including CertainTeed, Owens Corning, and IKO for roofing, so a full replacement on a 92870 bungalow doesn’t default to whatever’s on the shelf. You’ll get the right product for your roofline, your exposure, and your budget. Estimates are free, and the written line-item scope we give you is how we’re judged from the first walkthrough to the final inspection sign-off.
Styles & brands we work with
Hire a General Contractor in Placentia
Hire a General Contractor in Placentia when the job touches more than one trade and more than one permit. A room addition on a 1950s pier-and-beam home in 92870 won’t just be framing and drywall. It’s the foundation check, the panel upgrade, the re-roof tie-in, and the setback verification against a property line that may have been drawn when the lot was first subdivided. That’s the scope a general contractor is supposed to hold. On a Placentia room addition, expect $45,000 to $130,000 depending on size, foundation condition, and finish level. A detached-garage ADU conversion in the older core typically runs $90,000 to $220,000 once footings, drainage, and utility rough-in are priced honestly.
Single Contract Accountability
When you hire us, you don’t juggle a roofer for the tie-in, an electrician for the panel, and a finish carpenter for the shiplap. We sequence all of it and we answer for all of it. In Placentia’s built-out core, where the work is almost always remodel-in-place rather than new-build, that single point of accountability is what keeps a project from stalling between trades.
Permit-Ready Scope From Day One
We pull permits, schedule the city inspections, and log every sign-off. A Placentia homeowner with a documented inspection trail has something a verbal “trust me” never provides: a record that the in-wall rough-in, the structural connection, and the final were each confirmed by a third party. That file matters later, especially with insurers.
General Contractor Services in Placentia
General Contractor in Placentia services from Square One Builders cover the full envelope of a home remodel: kitchens, bathrooms, whole-home updates, room additions, garage conversions, and ADU construction. In 92871 tract homes from the 1960s and 1970s, we’re usually gutting a dated kitchen or converting a garage into a rental unit or in-law suite. In the 92870 core, the work is often messier: original detached garages on shallow slabs, mature citrus roots lifting driveways, and narrow side yards that force creative setback solutions. For a full kitchen remodel in Placentia, budget $14,000 to $45,000. A bathroom remodel runs $9,000 to $28,000. Garage conversions sit between $30,000 and $80,000 depending on whether the existing slab will pass.
ADU and Garage Conversion Work
Placentia’s older parcels carry large lot coverage, which is why ADU construction has become the single most requested scope we quote in the city. Before we price a conversion, we check what the detached garage actually sits on. A shallow footing that’s been fine for storing a 1963 Chevy is often not fine for a habitable unit, and that check changes the real cost. We run it before you’re committed.
Roofing, Windows, and Exterior Systems
Santa Ana wind events make roof and window choices structural decisions in Placentia, not aesthetic ones. We supply and install CertainTeed and Owens Corning roofing systems built for wind uplift, and impact-rated window packages where the homeowner wants documented storm protection. Roof replacement in Placentia runs $8,000 to $20,000. Impact windows start around $8,000 and can reach $25,000 for full-home retrofits with permit and inspection.
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.
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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.
Trusted Brands We Service in Placentia
We stock and source from a deep bench of manufacturers because a 1924 craftsman in the Packing House district doesn’t need the same roof as a 1998 tract home off Kramer Boulevard. For Placentia roofing scopes, we regularly specify CertainTeed, Owens Corning, and IKO, and we can pull Atlas when the budget or aesthetic calls for it. Because we’re a full-scope general contractor, not a roofing sub, the shingle you pick gets tied into the fascia, flashing, and gutter work done by the same crew that framed your addition. That coordination is what keeps a Placentia remodel watertight through a wet winter after a dry Santa Ana season.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in Placentia Homes
- Shallow-footing detached garages quoted as easy ADUs. In 92870’s older core, many single-car garages sit on slabs or footings never designed for living space. A cheap bid skips the check; a compliant one starts there. We’ve seen scope change the day the slab probe comes back thin.
- Knob-and-tube and early panel wiring hiding in pre-war walls. Opening a 1930s wall in central Placentia often reveals electrical that predates modern code. If the budget doesn’t include a panel and branch-circuit upgrade, the inspection will catch it, and the homeowner pays twice.
- Citrus-root damage to driveways and shallow utilities. Decades of mature orange and avocado roots have lifted concrete and cracked lines across Placentia’s older parcels. A patio or ADU scope that doesn’t account for that drive is a change order waiting to happen.
- Skipped inspection sign-offs that insurers ask for later. Work in the walls that’s never confirmed by a third-party inspector becomes a liability when a claim happens. A documented permit file is part of the deliverable, not an upsell.
Pricing for General Contractor in Placentia, CA
Here are real, market-calibrated ranges for the Placentia scopes we quote most. These are written line-item ranges, not teaser numbers. What moves the final figure: foundation condition, whether the existing structure will pass inspection without remediation, finish level on fixtures and surfaces, and whether the work triggers panel, seismic, or wind-load upgrades. We’ll never hand you a verbal number and start swinging hammers. You get a written scope and an allowance schedule before you sign.
| Scope | Placentia Range |
|---|---|
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Home Addition | $45,000 – $130,000 |
| Roof Replacement | $8,000 – $20,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Concrete Driveway Installation | $4,500 – $12,000 |
Call (877) 688-9930 for a free estimate on any of these scopes. We’ll walk your Placentia property, check what’s actually under the surface, and put the real number in writing.
We Also Serve Cities Near Placentia
Square One Builders works across north Orange County. Beyond Placentia, we regularly quote and build in Placentia‘s neighbors: Brea, Anaheim, Fullerton, and Yorba Linda. Each city has its own permit desk, inspection rhythms, and housing age mix, and we’ve built in all of them. If your property sits near the Brea or Yorba Linda line, your scope may touch two jurisdictions’ worth of code, and we’ll manage that too.
Serving Placentia, CA — Our Local Coverage Area
We’re based in the Placentia 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 Placentia
Yes. Placentia sits in the Santa Ana wind corridor, and the city enforces structural and roofing requirements that account for wind uplift on new and converted living space. Your ADU’s roof framing, tie-downs, and any new window or door openings must meet the current California Building Code exposure ratings for our area. A compliant quote includes the engineering, the specified fasteners and strapping, and the inspection sign-off that proves it was installed as designed. Call (877) 688-9930 and we’ll walk you through what your specific conversion triggers.
Documented inspection sign-off gives your insurer a paper trail that the work behind the walls was confirmed by a third party. If you ever file a claim involving that addition, the file shows the framing, electrical, rough-in, and final were each checked and passed. Without it, the insurer may question whether latent defects were properly addressed, and that can affect coverage or payout. It’s a direct deliverable we hand over at project close, not a request you have to chase.
Because most of Placentia’s older detached garages sit on shallow footings that were never meant to carry living space, and many driveways have been lifted by decades of citrus roots. A bid that doesn’t probe the slab, check setbacks, and price drainage is bidding a fantasy. When the slab comes back too thin or the property line crowds the structure, the cheap number dies and the homeowner eats change orders. Our scope does those checks before you sign, so the number you approve is the number that reflects real conditions.
A compliant quote from a Placentia general contractor includes the permit fees, the engineering or structural review, the wind-load and seismic detailing where required, and an allowance schedule for finishes and fixtures that has actual dollar ranges attached. It also includes the inspection sign-off line items, so you know the work in the walls will be confirmed. The cheap bid leaves those out because they cost money and slow the start date. You find them later, after the walls are open and the inspector asks questions. Call (877) 688-9930 for a written scope that includes every one of those line items up front.
Yes, it should change how your roof and windows are specified, not just how they’re priced. A re-roof on a Placentia home without wind-rated shingles and properly tied-down decking is a risk the cheap bid ignores. Impact-rated windows and ember-resistant venting are code-relevant in our exposure zone, and we spec CertainTeed, Owens Corning, and other wind-rated systems accordingly. If you’re replacing a roof or adding a room with new glazing, the wind rating and the inspection record that proves it should be in the quote from day one.
Written by Brent Calloway, Owner at Square One Builders, serving Placentia and north Orange County.