How much more does hillside cost?

Hillside construction typically adds 35–80% to comparable flat-lot work, driven mostly by foundations, retaining, drainage, and access.

Do you work in the Hollywood Hills?

Yes — Hollywood Hills, Hollywood Hills West, Beachwood Canyon, Laurel Canyon, Mount Washington, Silver Lake, Bel Air, Brentwood hills, and Palisades hillsides.

Can you build on a difficult-access lot?

Usually yes — we plan crane set, helicopter set (for very tight lots), and hauled spoil management as part of the contract.

Do I need a geotech report for an LA hillside project?

Almost always. LADBS requires it on any new hillside foundation, addition, or substantial structural work. We arrange the geotech as part of the feasibility brief.

How are LA hillside drainage requirements handled?

Engineered subdrains behind retaining walls, surface swales away from the foundation, and discharge to an approved point — usually a storm drain or curb. We design drainage with the structural engineer, not as a landscape afterthought.

Desk 02 · Los Angeles · Hillside

Los Angeles Hillside Construction Contractor. build on the slope, not against it.

LA hillside construction is its own discipline — engineered caissons, grade beams, slope stability, drainage, hauling, and crane access. We design and build hillside additions, ADUs, decks, and new construction in the Hollywood Hills, Hollywood Hills West, Pacific Palisades, Mount Washington, Silver Lake, and Bel Air.

Licensed California contractor · CSLB #1156772 · Los Angeles desk · LADBS

Begin a Los Angeles hillside construction brief →← Back to Los Angeles desk

Hillside projects live or die on the soils report, the structural engineer, and the drainage design. We commission all three before any drawings advance.

Los Angeles permit notes · Hillside

What we resolve before drawings begin.

01
Soils report + geotech
Every hillside project starts with a soils / geotech report. LADBS requires it and the structural engineer needs it.
02
Engineered drainage
Hillside lots fail from water, not weight. Engineered subdrains, swales, and surface drainage are part of the structural design — not an afterthought.
03
Hauling + crane access
Most LA hillside sites need hauled excavation, crane set, and traffic management. We project-manage logistics and permits.

Foundation intel · the hardware that holds the house · Los Angeles spec

Foundation work in LA is 80% geotechnical engineering, 20% concrete. The brand of structural hardware matters less than the soils report.

The manufacturers we actually specify.

4 brands · ordered by frequency on jobs

Simpson Strong-Tie
premium
Pleasanton, CA · founded 1956
Connectors, anchors, retrofit kits — the structural hardware monopoly for good reason
Every shear-wall hold-down, mudsill anchor, foundation strap, and seismic retrofit kit on our jobs is Simpson. Inspector recognition is universal.
Single-source hardware for IBC-compliant connections
Hilti / Powers
premium
Liechtenstein · USA
Adhesive anchors (HIT-RE 500, KB-TZ2 wedge anchors)
Required for retrofit anchor installations into existing concrete with passing pull-tests on inspection.
Ram Jack / Atlas Piers
specialty
USA · regional dealers
Helical and push-pier underpinning systems
Helical piers reach competent strata beyond expansive clay or fill. The right call for hillside settlement and additions over weak soils.
Quikrete / CalPortland
workhorse
USA · CA
Pre-mix bagged concrete + locally-batched ready-mix
We use CalPortland 3,500 PSI ready-mix on stem walls and footings; Quikrete 5000 only for small pours where a truck doesn't pencil.

Material tiers · what you're actually choosing between.

CA installed pricing · 2025

Material	Lifespan	Installed in CA	Best for	Trade-offs
Continuous concrete footing + stem wall	100+ years	$280–$550 / linear ft	New ADUs and additions.	Requires soils report + engineered design for CA code.
Slab-on-grade (post-tensioned or conventional)	100+ years	$14–$22 / sq ft	New construction on stable LA soils.	Post-tension repairs are specialty work — only crews with PT experience should cut.
Helical pier underpinning	50–75 years rated	$2,500–$5,500 per pier	Settlement remediation, hillside additions, expansive soils.	Need access to drive equipment to footing line; not always feasible in tight side yards.
Retrofit cripple-wall reinforcement	50+ years	$5,000–$12,000 per house	Pre-1978 LA homes — Brace + Bolt program eligible.	Crawl-space access required; can't be done from above.

Specification gotchas we resolve before contract.

01
Soils report (geotechnical) BEFORE design.
Expansive clay is everywhere in LA. We get a soils report on every foundation project — never trust the prior survey from the 1960s.
02
Title 24 + R-19 under slab in CZ8.
New ADU slabs in most LA climate zones need under-slab insulation. Place vapor barrier (10 mil) and rigid foam before pour, not as an afterthought.
03
Existing pier-and-post houses (pre-1939).
Many craftsman homes in Pasadena and Highland Park sit on brick piers. Retrofit to continuous foundation + bolts before adding any load.

Sources · Simpson Strong-Tie technical resources · CEA Brace + Bolt program

Other Los Angeles services.

All Los Angeles services →

Los Angeles city directory · 314 cities served

Hillside Construction, written for your city.

Each link opens a dedicated page calibrated to the city's permit authority, lot conditions, and price band — not a generic regional landing.

Los Angeles · Hillside FAQ

Questions Los Angeles homeowners ask first.

Start an LA hillside construction brief. We'll arrange soils + geotech, walk drainage, and write a fixed-scope contract.

How much more does hillside cost?
Hillside construction typically adds 35–80% to comparable flat-lot work, driven mostly by foundations, retaining, drainage, and access.
Hillside soils & geotech →Calculator methodology →LA cost anatomy →
Do you work in the Hollywood Hills?
Yes — Hollywood Hills, Hollywood Hills West, Beachwood Canyon, Laurel Canyon, Mount Washington, Silver Lake, Bel Air, Brentwood hills, and Palisades hillsides.
Can you build on a difficult-access lot?
Usually yes — we plan crane set, helicopter set (for very tight lots), and hauled spoil management as part of the contract.
Do I need a geotech report for an LA hillside project?
Almost always. LADBS requires it on any new hillside foundation, addition, or substantial structural work. We arrange the geotech as part of the feasibility brief.
Hillside soils & geotech →
How are LA hillside drainage requirements handled?
Engineered subdrains behind retaining walls, surface swales away from the foundation, and discharge to an approved point — usually a storm drain or curb. We design drainage with the structural engineer, not as a landscape afterthought.
Hillside soils & geotech →

Begin

Begin your projectin twenty minutes.

A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.

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About Hillside Construction in Los Angeles

What we resolve before drawings begin.

Soils report + geotech

Engineered drainage

Hauling + crane access

Foundation work in LA is 80% geotechnical engineering, 20% concrete. The brand of structural hardware matters less than the soils report.

Simpson Strong-Tie

Hilti / Powers

Ram Jack / Atlas Piers

Quikrete / CalPortland

Soils report (geotechnical) BEFORE design.

Title 24 + R-19 under slab in CZ8.

Existing pier-and-post houses (pre-1939).

Other Los Angeles services.

Hillside Construction, written for your city.

Questions Los Angeles homeowners ask first.

Begin your projectin twenty minutes.

Hillside Construction in Los Angeles. Tell us the parcel.