How much does basement waterproofing cost in Pomona, CA?

Most Pomona homeowners spend between $3,400 – $13,600 on basement waterproofing, with an average around $7,350. Local labor prices 13% above the national average, so Pomona quotes tend to land at the higher end of national ranges.

How many quotes should I get in Pomona?

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/Pomona, CA

Los Angeles · California

Basement Waterproofing cost in Pomona, CA

Pomona homeowners typically pay $3,400 – $13,600 for basement waterproofing. Local labor and materials price 13% above the national average.

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Pomona average

$7,350

Typical low

$3,400

Typical high

$13,600

Per linear foot

$45 – $285

Sample ZIP

91766

What drives Pomona pricing

Local labor

Licensed Pomona contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 13% above the national labor average. Demand in the Los Angeles market peaks in spring, so booking early usually beats a rush premium.

Permits & code

Pomona follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Pomona 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

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

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Wall length to treat80 linear feet

Method

Foundation depth

Exterior access

Water problem

Estimated project cost

$452 – $1,360

Most homeowners pay around $906

Compare method

Cost by material in Pomona

Installed Pomona pricing per linear foot.

Option	Installed cost	Pros	Cons
Interior sealant	$6 – $17	Cheapest, DIY possible	Cosmetic — does not stop hydrostatic pressure
Interior drain tile + sump	$45 – $115	Effective, no landscaping destroyed, done in days	Relies on a pump and power
Exterior membrane	$115 – $285	Stops water before it reaches the wall — the permanent fix	Most expensive and disruptive
Crawlspace encapsulation	$23 – $68	Controls humidity, mold and energy loss	Needs a dehumidifier to keep working
Wall reinforcement	$90 – $225	Addresses bowing plus water together	Structural scope and engineering

Where the money goes in Pomona

A typical $7,350 Pomona project, broken down by line item.

Labor and excavation50% · $3,675
Drainage materials22% · $1,617
Sump pump and equipment16% · $1,176
Concrete restoration and disposal12% · $882

Common add-ons

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

Sump pump

$680 – $2,250

Battery backup

$565 – $1,700

Dehumidifier

$1,350 – $3,400

Mold remediation

$1,700 – $6,800

Vapor barrier

Per square foot

$2 – $7

Egress window

$2,800 – $6,800

Ways to save in Pomona

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.

Pomona FAQs

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Basement Waterproofing cost near Pomona

Basement Waterproofing cost in Los Angeles, CA

$3,731 – $14,924

Basement Waterproofing cost in Long Beach, CA

$3,671 – $14,683

Basement Waterproofing cost in Pasadena, CA

$3,851 – $15,405

Basement Waterproofing cost in Glendale, CA

$3,761 – $15,044

Basement Waterproofing cost in Santa Clarita, CA

$3,490 – $13,961

Basement Waterproofing cost in Torrance, CA

$3,701 – $14,804

More California cities

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

Other project costs in Pomona

Fence Installation in Pomona

$1,695 – $4,520

Roof Replacement in Pomona

$9,605 – $38,420

Kitchen Remodel in Pomona

$20,340 – $107,350

HVAC Replacement in Pomona

$6,215 – $20,340

Deck Building in Pomona

$4,972 – $13,560

Window Replacement in Pomona

$508 – $1,695

See every Pomona cost guide