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Sakrete Home Additions & ADU: The Los Angeles Owner’s Guide
If you’re planning a home addition or ADU in Los Angeles and want Sakrete concrete products specified for the job, you’re looking at an installed range of $53,100 – $153,400 for the full addition, and $106,200 – $259,600 for a complete ADU. Bradford Remodeling works with Sakrete mixes on foundations, slabs, and footings across Los Angeles every week, and we can usually get your project scoped and priced within a few days of the first walkthrough. Most owners come to us when they’ve pulled Sakrete specs from an architect or engineer and need a contractor who won’t substitute cheaper bag mix at the last minute.
The failure point most people don’t see coming isn’t the concrete itself. It’s the specification drift: the wrong PSI mix gets ordered, the slump is off for our summer heat, or the cure timing gets rushed because the schedule slipped. When that happens, you get hairline cracks in the first eighteen months, a slab that spalls at the edges, or a stem wall that doesn’t anchor the framing the way the drawings called for.
Which Sakrete Models This Applies To
For Los Angeles home additions and ADUs, the relevant Sakrete product line is their structural concrete and mortar family. You’ll see three mixes specified most often in LA permit drawings: Sakrete 5000 Plus (high-strength, rated at 5,000 PSI at 28 days), Sakrete High-Strength Concrete Mix (4,000 PSI, the most common spec for residential footings and slabs), and Sakrete Fast-Setting Concrete Mix for fence posts and small pads where the inspector wants a quick initial set. If your drawings call for a specific PSI, do not let anyone substitute a lower-rated mix, and verify the bags on site before the pour starts. The bag face prints the PSI rating and the yield per 60-lb or 80-lb bag, and that number needs to match your structural engineer’s spec.
We purchase Sakrete products through local Los Angeles suppliers, and we’re an independent contractor, not a Sakrete affiliate or authorized dealer. The good news on parts and materials: Sakrete’s bag mixes are widely available, and we don’t have to special-order anything for a standard addition or ADU. The gotcha is that some big-box stores in Los Angeles stock Sakrete bags that have sat in outdoor garden aisles through a rainy January or a 110-degree August. Bag mix that’s been exposed to moisture clumps and loses strength. We inspect every pallet before it hits the truck, and we won’t pour a foundation with bags that show hardened corners or torn liners.
Styles & brands we work with
Signs Your Sakrete Home Addition or ADU Is Failing
- Hairline cracks running through the slab within the first year. This usually means the mix was too wet at pour time or the subgrade wasn’t compacted properly. In Los Angeles, expansive clay soils in neighborhoods like Baldwin Hills and parts of the Valley make this worse if the soil wasn’t prepped right.
- Spalling or flaking at slab edges. Water sat on the surface during finishing, or the concrete cured too fast in direct Los Angeles sun. Once the surface starts flaking, you can patch it, but the slab’s wear layer is compromised.
- Doors and windows in the new addition that stick or bind. The foundation settled unevenly. That points to a footing problem below the stem wall, which is a structural issue you want us to look at before it worsens.
- Visible efflorescence, the white powdery film, on interior concrete surfaces. Moisture is moving through the slab because the vapor barrier wasn’t installed or was punctured. In Los Angeles, this matters even in dry climates because irrigation water and morning fog push moisture into slabs.
- The concrete surface powders or chalks when you sweep it. The mix had too much water or the finish was overworked, and the cement paste broke down. You’ll see this most often on ADU floors that were poured in a rush.
See the difference
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AfterReplacement Cost & What’s Included
For a full home addition in Los Angeles where Sakrete concrete is specified for foundations, slabs, and footings, plan on $53,100 – $153,400 installed, depending on square footage, soil conditions, and whether you’re doing a single-story bump-out or a two-story addition. A standalone ADU runs $106,200 – $259,600, and that range reflects everything from a 400-square-foot studio conversion to a two-bedroom unit with a full kitchen and bath.
Here’s what those numbers cover when we do the work:
- Written line-item pricing before any concrete is ordered or any tool comes out of the truck
- Sakrete bags verified on site, matched to your engineer’s PSI spec, never swapped without written sign-off
- Subgrade prep, compaction, and vapor barrier installation per code
- Form work, rebar or mesh per the structural drawings, and city inspection coordination
- Full clean-up after the pour, with forms stripped and the site left walkable
- The 365-Day Done Right Promise in writing: if the concrete work within our scope fails inside the first year, we return and correct it at no charge
On a typical 800-square-foot ADU, the concrete portion of the job, the footing, stem wall, and slab, usually runs $14,000 – $28,000 of the total budget. That’s not a hidden line item; it’s a number we put in writing before you sign anything.
DIY or Call Us?
You can bag-mix your own concrete for a small pad or a fence post, and for something like a Sakrete Fast-Setting post hole, a homeowner with a wheelbarrow and a hose can get it done on a Saturday. But a home addition or ADU foundation is not that. You’re pouring structural concrete that holds up framing, drywall, windows, and people. The forms have to be square and level. The rebar has to be placed at the right depth. The city inspector has to sign off before and after. If the mix is wrong, you can’t pull it out and start over cheaply.
We are a by-the-book crew. Curtis Lane runs Bradford Remodeling in Los Angeles with a straight number, real scope, and no surprises at the punch list. If you want the foundation done to spec and the paperwork to back it, call (903) 568-7222 and we’ll schedule a walkthrough.
FAQs
A properly mixed, placed, and cured Sakrete 4000 or 5000 PSI foundation should last the lifetime of the structure, 50 years plus, with no major repair in Los Angeles. The real variables are soil movement and water management, which is why we spend more time on drainage and compaction than most crews will.
Hairline cracks under 1/8 inch can often be sealed and monitored, but structural cracks, cracks with vertical displacement, or cracks that keep growing usually mean the subgrade or footing is failing beneath the slab, and patching won’t fix what’s underneath.
For a standard ADU in Los Angeles, the concrete work, excavation through the slab pour, typically takes 5 to 10 working days, including inspection windows. Weather and city inspector availability are the two variables that stretch that timeline.
We don’t warehouse bag mix in a yard. We order Sakrete pallets from Los Angeles suppliers for each job so the bags arrive fresh and sit on site for the shortest possible time before the pour. That reduces the risk of moisture or heat damage that comes with long storage.
Written by Curtis Lane, Owner, Bradford Remodeling at Bradford Remodeling, serving Los Angeles and nearby areas.
