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Quikrete Home Additions & ADU: The Los Angeles Owner’s Guide
Quikrete home additions and ADU construction in Los Angeles typically runs $53,100 to $153,400 for a full scope, and ADU construction specifically lands between $106,200 and $259,600 depending on square footage, foundation type, and utility runs. We install Quikrete-compatible foundation systems, slab work, and masonry components as part of complete addition and ADU builds, and we stock the core Quikrete mixes on our trucks for Los Angeles job sites. Most owners find us after a slab pour has spalled, a stem wall has shifted, or an inspector flagged improper mix ratios on a previous contractor’s work.
What usually prompts the call: you’ve got a drawing set, maybe a permit in hand, and a concrete specification that lists Quikrete products by name. Or you’ve got an existing addition showing cracks and moisture intrusion, and you need a crew that knows the difference between a 4,000 PSI mix for footings and a 5,000 PSI mix for retaining walls in expansive Los Angeles soil. Either way, the part that fails first is almost always the concrete work itself: bad slump, wrong cure time under Southern California sun, or wire reinforcement placed too low in the slab. If you’re mid-project or repairing one, this page is your straight answer on what’s involved and what it costs.
Which Quikrete Models This Applies To
Quikrete doesn’t make “models” in the appliance sense, it makes concrete and masonry products that go into your addition or ADU. The relevant product families for Los Angeles home additions and ADU builds are: Quikrete 5000 Concrete Mix (the standard for footings, stem walls, and structural slabs), Quikrete ProFinish 5000 (a higher-slump mix for formed walls and columns), Quikrete FastSet Concrete Mix (used for post bases and rapid repairs where you can’t wait a 28-day cure), and Quikrete All-Purpose Gravel for base preparation under slabs. We also work with Quikrete’s QUIKRETE Sand Mix for shower pans and bathroom additions, and their Scratch & Brown Base Coat for stucco exteriors on Los Angeles ADUs.
The compatibility gotcha most homeowners miss: Quikrete 5000 and ProFinish 5000 are not interchangeable for every application. ProFinish has a higher water demand and flows better into tight formwork, but it’s not rated for the same load-bearing capacity as Quikrete 5000 when you’re pouring a 6-inch slab under a second story. If your plans call for 5,000 PSI structural concrete, get the specification from your engineer and match the product exactly. We write the Quikrete product number into the scope of work before any pour, so the inspector can verify what’s in the truck against what’s in the plans. That’s the Garrison Standard way: the mix is documented, not guessed at.
We’re an independent Los Angeles contractor, not affiliated with Quikrete. We choose their products because they’re widely available, specified by local structural engineers, and have consistent bag-to-bag performance when the batch plant isn’t an option for smaller pours.
Styles & brands we work with
Signs Your Quikrete Home Additions & ADU Is Failing
- Map cracking across the slab surface within the first year. This is usually a cure problem. Concrete poured in Los Angeles heat without proper water retention or a cure-and-seal application dries too fast, and the surface layer shrinks faster than the body of the slab. That’s a cosmetic-now, structural-later situation. We see it in sun-exposed additions built mid-summer.
- Moisture wicking through the slab edge where it meets the stem wall. That’s a missing or failed capillary break. On flat Los Angeles lots where groundwater rises after winter rain, a slab poured directly onto compacted soil without a vapor barrier will pull water up through the concrete and into your flooring.
- Chipping or flaking around anchor bolts and post bases. FastSet mix that was over-watered at install loses compressive strength. The concrete around a hold-down holds less than the engineer counted on. On hillside additions in areas like Silver Lake or Mount Washington, that’s a seismic concern, not just a cosmetic one.
- Cracks wider than a quarter inch that run vertically through a stem wall. That points to a footing that settled or was under-sized for the native soil. Los Angeles has extensive clay soil zones that shrink in drought and expand in rain. A footing sized for sandy soil won’t behave the same in clay.
- Efflorescence, the white powdery residue, blooming on the inside face of an ADU wall. Water is moving through the concrete and carrying soluble salts to the surface. It’s a sign of a pore structure problem, often from too much water in the mix or improper curing. It might just look like dust, but it means moisture management failed.
See the difference
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AfterReplacement Cost & What’s Included
For Los Angeles additions and ADUs, the full scope lands between $53,100 and $153,400. ADU construction alone runs $106,200 to $259,600. What drives the range: square footage, whether you’re on a flat lot or a slope, how far the utility trenching has to go from the main structure, and whether the existing foundation work is salvageable. A straight-footing addition on a flat Mid-City lot costs less than an ADU on a downslope in Sherman Oaks that needs retaining walls and stepped footings.
Every bid we write includes the concrete, reinforcement, forming labor, mixing, placement, finishing, and the cure-and-seal step that Los Angeles weather makes non-negotiable. It also includes a line item for the Quikrete product specified by your engineer, so you know exactly what’s going into the ground. There is no “concrete, whatever works” line on a Bradford estimate. If the slab cracks, spalls, or fails within the first year, the 365-Day Done Right Promise covers the correction. We return and make it right at no charge. Written in the contract before the first bag opens.
DIY or Call Us?
Here’s the honest split. You can safely inspect visible cracking, check the width with a dime (a dime’s edge is about 1 millimeter, a quarter is about 1.75 millimeters), and note whether cracks are growing season to season. You can also pressure-wash the surface to see if what looks like a crack is just a surface scratch in the cure coat. What you should not do is pour structural concrete for a permitted addition or ADU without a crew that knows how to strike off, bull float, and time the finishing under Los Angeles sun. Get the finishing timing wrong and you trap bleed water under a prematurely sealed surface, which is how you get that map cracking a year later.
Mixing and placing concrete for footings and walls is not a weekend project. It’s a structural component of your home. If the inspector red-tags an under-strength pour, you pay to remove and replace it, and the second try costs more than the first. Call (903) 568-7222 and we’ll price the concrete scope as part of the full build, whether you’re going from foundation to drywall or just need the slab done right so another crew can take it from there.
FAQs
A properly mixed, poured, and cured Quikrete slab in Los Angeles should last the life of the structure, which is 50-plus years, barring seismic movement or drainage failures. What shortens that lifespan here is not the concrete, it’s the cure. We cure-and-seal every slab we pour, and we document the product used.
Hairline surface cracks can often be sealed with an appropriate concrete repair material, but structural cracks wider than a quarter inch through a footing or stem wall usually require engineered repair or section replacement. We’ll tell you which one you have after a site visit, and the written quote will specify repair versus replacement. Call (903) 568-7222 to schedule an assessment.
Foundation and slab work typically takes three to five working days from form set to cure-and-seal application, depending on the footprint and the footing depth. The full addition or ADU build runs three to eight months, and the schedule is written into the contract so you know what happens each week.
Yes. We keep Quikrete 5000, ProFinish 5000, FastSet, and All-Purpose Gravel stocked on our Los Angeles trucks, along with the vapor barrier, wire mesh, and rebar chairs that go with a proper pour. If your plans specify a less common Quikrete product, we source it and write the product number into your scope of work before we start.
If you’re planning a Los Angeles addition or ADU and want a straight number with the Quikrete specs written into the contract, call (903) 568-7222 for a free estimate. Curtis Lane will walk the site, explain exactly what’s needed, and hand you a written price before any work begins.
Written by Curtis Lane, Owner, Bradford Remodeling at Bradford Remodeling, serving Los Angeles and nearby areas.
