How much does basement waterproofing cost in Santa Monica, CA?

Most Santa Monica homeowners spend between $4,150 – $16,600 on basement waterproofing, with an average around $8,950. Local labor prices 38% above the national average, so Santa Monica quotes tend to land at the higher end of national ranges.

How many quotes should I get in Santa Monica?

Get at least three written quotes from licensed, insured California contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Los Angeles market.

How much does basement waterproofing cost?

$3,000 to $12,000 on average. Interior drainage is $3,000 to $10,000; exterior excavation is $8,000 to $25,000.

Interior or exterior waterproofing?

Interior drain tile manages water that gets in and costs far less. Exterior membrane keeps water out entirely and is the permanent fix, at two to three times the price.

How much is a sump pump?

$1,000 to $3,000 installed, plus $500 to $1,500 for a battery backup that keeps working during a storm outage.

Is waterproofing covered by insurance?

Groundwater seepage is excluded from standard homeowners policies. Separate flood insurance or a water backup endorsement is required.

Will waterproofing fix mold?

It stops the moisture source, but existing mold needs separate remediation, typically $1,500 to $6,000.

Does a dry basement add value?

Yes — a documented, warrantied waterproofing system removes a major buyer objection and enables finishing the space.

Home/Cost guides/Basement Waterproofing/Santa Monica, CA

Los Angeles · California

Basement Waterproofing cost in Santa Monica, CA

Santa Monica homeowners typically pay $4,150 – $16,600 for basement waterproofing. Local labor and materials price 38% above the national average.

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Santa Monica average

$8,950

Typical low

$4,150

Typical high

$16,600

Per linear foot

$55 – $345

Sample ZIP

90401

What drives Santa Monica pricing

Local labor

Licensed Santa Monica contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 38% above the national labor average. Demand in the Los Angeles market peaks in spring, so booking early usually beats a rush premium.

Permits & code

Santa Monica follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Santa Monica building department plus Title 24 energy compliance. Seismic bracing and soft-story retrofit rules apply to many older LA-area properties, and hillside lots trigger extra geotechnical review.

Climate & conditions

Santa Monica sits in a warm Mediterranean climate with intense summer sun, so expect UV-stable, heat-tolerant materials and shaded scheduling in peak summer.

Instant cost calculator

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Wall length to treat80 linear feet

Method

Foundation depth

Exterior access

Water problem

Estimated project cost

$552 – $1,680

Most homeowners pay around $1,116

Compare method

Cost by material in Santa Monica

Installed Santa Monica pricing per linear foot.

Option	Installed cost	Pros	Cons
Interior sealant	$7 – $21	Cheapest, DIY possible	Cosmetic — does not stop hydrostatic pressure
Interior drain tile + sump	$55 – $140	Effective, no landscaping destroyed, done in days	Relies on a pump and power
Exterior membrane	$140 – $345	Stops water before it reaches the wall — the permanent fix	Most expensive and disruptive
Crawlspace encapsulation	$28 – $83	Controls humidity, mold and energy loss	Needs a dehumidifier to keep working
Wall reinforcement	$110 – $275	Addresses bowing plus water together	Structural scope and engineering

Where the money goes in Santa Monica

A typical $8,950 Santa Monica project, broken down by line item.

Labor and excavation50% · $4,475
Drainage materials22% · $1,969
Sump pump and equipment16% · $1,432
Concrete restoration and disposal12% · $1,074

Common add-ons

Extras that show up on Santa Monica quotes but rarely in the headline price.

Sump pump

$830 – $2,750

Battery backup

$690 – $2,050

Dehumidifier

$1,650 – $4,150

Mold remediation

$2,050 – $8,300

Vapor barrier

Per square foot

$3 – $8

Egress window

$3,450 – $8,300

Ways to save in Santa Monica

Do the cheap exterior fixes first — gutters, downspout extensions and grading solve many wet basements for under $1,000.
Choose interior drain tile over exterior excavation unless the wall itself is failing.
Get bids from waterproofing specialists and a general contractor; approaches and prices differ enormously.
Ask about a transferable lifetime warranty — it holds value at resale.
Install the sump and drainage before finishing the basement, never after.

Santa Monica FAQs

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Basement Waterproofing cost near Santa Monica

Basement Waterproofing cost in Los Angeles, CA

$3,729 – $14,916

Basement Waterproofing cost in Long Beach, CA

$3,669 – $14,675

Basement Waterproofing cost in Pasadena, CA

$3,849 – $15,397

Basement Waterproofing cost in Glendale, CA

$3,759 – $15,036

Basement Waterproofing cost in Santa Clarita, CA

$3,488 – $13,954

Basement Waterproofing cost in Torrance, CA

$3,699 – $14,796

More California cities

San Diego San Jose San Francisco Oakland Sacramento Fresno Anaheim Santa Ana

Other project costs in Santa Monica

Fence Installation in Santa Monica

$2,070 – $5,520

Roof Replacement in Santa Monica

$11,730 – $46,920

Kitchen Remodel in Santa Monica

$24,840 – $131,100

HVAC Replacement in Santa Monica

$7,590 – $24,840

Deck Building in Santa Monica

$6,072 – $16,560

Window Replacement in Santa Monica

$621 – $2,070

See every Santa Monica cost guide