The slope doesn't move if the wall underneath it is engineered, not eyeballed.
FRAMO builds shotcrete and CMU retaining walls engineered for LA's hillside lots — caisson and grade-beam footings sized to the actual soil and slope, drainage designed in from the start, not bolted on after the wall's already failing. If a slope is moving, or one you're planning to build on could, this is the wall that stops it.
CA General Building License #1138219 · Bonded $25,000 · Workers'-comp insured
Hillside retaining wall · Los Angeles
Two wall systems, built to hold — not just to look finished
A retaining wall is only as good as what's drilled below it and drained behind it. Here's what each part of the system actually does.
Shotcrete Retaining Walls
Reinforced concrete sprayed directly onto a rebar cage against the cut slope, then finished. Faster to form on irregular or steep hillside cuts than poured concrete, and it bonds tighter to an uneven excavation face — the standard choice for most of LA's hillside lots.
Best on: most LA hillside retaining applications
CMU (Block) Retaining Walls
Engineered concrete masonry block, grouted solid and reinforced with vertical and horizontal rebar per the engineer's schedule. The right call for lower walls, straight runs, and sites where a block finish is the design intent rather than a shotcrete texture.
Best on: smaller residential walls, design-forward block finishes
Caisson & Grade-Beam Foundations
Drilled piers (caissons) socketed into competent soil or bedrock, tied together with a grade beam that the wall stem sits on. This is what actually keeps a tall hillside wall from sliding or overturning — the wall above ground is only as good as what's drilled below it.
Best on: tall walls, unstable or shallow competent soil
Subdrain & Weep Systems
Perforated drain pipe behind the wall, free-draining gravel backfill, and weep holes through the wall face. This is the part nobody sees and everybody eventually notices if it's missing: undrained hydrostatic pressure is the single most common reason retaining walls fail.
Best on: every retaining wall we build, no exceptions
Hillside Lot Grading & Slope Stabilization
Cut-and-fill grading tied to the retaining structure, so the finished slope, drainage path, and wall work as one system instead of three separate contractors' worth of guesswork.
Best on: hillside lots being newly graded or re-stabilized
Same hillside, one engineered structure holding it
A raw graded slope on the left, a finished engineered retaining wall on the right. Drag the handle across to see the stage change.
Real FRAMO jobsite photography — no renders, no stock. Confirm this is a matched before/after of the same structure before launch (see the HTML comment at the top of this file).
What's actually holding the hillside back
A retaining wall that looks identical from the front can have two completely different lifespans depending on what's behind it. This is the build-up on a typical FRAMO hillside retaining wall.
Governed by CBC Chapter 18 (soils and foundations) plus the project's site-specific geotechnical report. Drainage design verified before backfill closes the slope up.
Six stages on the website, eight when a hillside is involved
Scroll the sequence
Geotechnical & Soils Review
Soil bearing capacity, lateral earth pressure, and slope stability get evaluated before anyone sizes a wall — the soil, not the wall height alone, drives the engineering.
Plan & Engineering
A structural engineer sizes the wall type, footing (caisson or grade-beam), rebar schedule, and drainage design, and produces the permit set.
Permit & Plan Check
LADBS review — in LA, most retaining walls over 4 feet, or any wall supporting a surcharge, require an engineered plan, not a contractor's judgment call.
Excavation & Temporary Shoring
The cut goes in, shored where needed to keep the slope safe and stable while the permanent wall is built.
Caisson or Footing Install
Piers drilled and socketed, or grade beams formed and poured, before the wall stem goes up.
Wall Construction
Rebar cage placed, then shotcrete sprayed or CMU block laid and grouted per the engineer's schedule.
Drainage & Waterproofing Install
Subdrain pipe, free-draining backfill, waterproofing membrane, and weep holes go in before the slope is closed up — this step is inspected, not assumed.
Final Inspection & Handoff
Structural work signed off, final grading and landscaping-ready backfill completed.
Four systems, side by side
In the terms that decide how each one gets built — and what goes wrong when it's rushed.
| System | Shotcrete Wall | CMU Wall | Caisson Foundation | Grade-Beam Foundation |
|---|---|---|---|---|
| Primary material | Sprayed reinforced concrete | Grouted, reinforced concrete block | Drilled concrete piers | Poured concrete beam on piers or footings |
| Typical height range | Up to 15+ ft on hillside lots | Typically under 6-8 ft | Any height — sized to soil depth | Any height — ties piers together |
| Best fit | Steep, irregular hillside cuts | Lower walls, straight runs, exposed block finish | Tall walls, unstable or shallow competent soil | Tall walls needing a continuous footing across piers |
| Common failure if rushed | Poor bond to slope, inadequate drainage behind it | Ungrouted cells, missing rebar, cracking | Undersized pier depth or diameter for the soil | Undersized beam for the actual pier spacing |
| Best for | Most LA hillside retaining applications | Smaller residential walls, design-forward block finishes | Sites with poor near-surface soil | Sites where piers need to act as one structure |
The soil report decides the wall — not the other way around.
Design follows the code and the soil report
Retaining wall design in LA follows CBC Chapter 18 (soils and foundations) plus a geotechnical engineer's site-specific lateral earth pressure and soil-bearing calculations — there's no generic wall thickness that's "safe enough" independent of the actual soil report.
Most walls over 4 feet need an engineered plan
Most jurisdictions, including LADBS, require an engineered plan and permit for any wall over 4 feet or one supporting a surcharge load — a driveway, structure, or slope above it.
Drainage is the difference, not detailing
Hydrostatic pressure buildup behind an undrained wall is the most common cause of retaining wall failure, more often than the concrete or block itself failing.
LA's hillside soils move — we plan around that
LA's hillside communities — Hollywood Hills, Silver Lake, Studio City, and similar terrain — sit on soils prone to slope movement, especially after a wet winter. We work out of Van Nuys within roughly a 60-mile radius and plan drainage and footing depth around LA's actual soil and rainfall patterns.
What owners ask before the slope gets touched
In most of LA, a retaining wall over 4 feet in height, or any wall that supports a surcharge load like a driveway, structure, or slope above it, needs an engineered plan and a permit — regardless of height. We check this on every site rather than assuming a lower wall is automatically exempt, since surcharge conditions trigger the same requirement.
Shotcrete is usually the better fit for steep, irregular hillside cuts because it bonds directly to the excavated slope without needing perfectly straight forming. CMU makes more sense for lower, straighter runs or where an exposed block finish is part of the design. We spec it based on your site's grade and soil, not a default preference.
Weep holes are small openings through the wall face that let water that reaches the wall drain out instead of building up behind it. They're a backup to the subdrain system, not a replacement for it — a wall with weep holes but no proper subdrain and free-draining backfill behind it is still at risk of hydrostatic pressure damage.
Often, yes — but it depends on whether the problem is drainage-related (fixable by adding a proper subdrain system) or structural (undersized footing or reinforcement, which usually means partial or full rebuild). We evaluate which one it is before quoting a fix, because those two problems have very different price tags.
Four things, in roughly this order: wall height and length (which drives both material quantity and footing size), soil conditions from the geotechnical report (poor soil means deeper caissons), access to the site for equipment on a hillside lot, and how much drainage and grading work the site needs beyond the wall itself. We break these out on the estimate so you can see where the number comes from.
Got a slope that's moving — or one you're about to build on?
Send us photos or a survey of the site and we'll tell you honestly what wall system and footing the grade actually needs — plus a real number, not a range that moves later.
framoconstruction.inc@gmail.com · 15321 Saticoy St, Van Nuys, CA 91406