Crawl Space Waterproofing in Marina del Rey, California
3 of the 33 crawl space companies serving Marina del Rey, California specifically list waterproofing among their services, led by All Weather Waterproofing & Coating (4.8★, 13 reviews). Local waterproofing typically runs $1,500–$5,000.
Get drainage and sump pump quotes from Marina del Rey pros who handle wet crawl spaces. 3 local pros offer waterproofing services. For full service comparisons, see all crawl space contractors in Marina del Rey or encapsulation pros in Marina del Rey.
Marina del Rey Waterproofing Cost — Southwest — Monsoon + Flash Flood
Annual precipitation: 8–15 inches; 40–60% during monsoon (July–September).
Cost varies with crawl space perimeter, sump pump capacity, discharge length, and exterior grading work. Get 2–3 quotes for an exact number.
Why Waterproofing Matters in Marina del Rey
The Southwest is dry most of the year, so waterproofing here is event-driven rather than continuous. Monsoon thunderstorms can drop more rain in 30 minutes than the area normally sees in a month. Most homes do not need a full interior drain system — but they do need exterior grading, downspout management, and a vapor barrier. Homes near washes or in flood plains need full waterproofing.
What a Marina del Rey Waterproofing System Should Include
- ✓Vapor barrier (10–12 mil sufficient — low humidity year-round)
- ✓Exterior French drain along uphill side of property if grading is unfavorable
- ✓Extended downspouts (10+ feet) — monsoon bursts overwhelm short ones
- ✓Sump pump only if home is in a documented flood plain or near a wash
- ✓Hard-piped drain to a daylight outlet (most Southwest soils drain well)
- ✓Pest exclusion at all foundation penetrations
Interior vs Exterior Drainage in California
Recommendation
Most Southwest homes do NOT need interior perimeter drains. Exterior grading and downspout extensions handle 90% of moisture events. Reserve full systems for flood plain homes or those near washes.
Sump Pump Sizing
Skip the sump pump unless you are in a flood plain or near a wash. The dry climate means the pump rarely runs and seal degrades from disuse. If you do install one, prioritize a model rated for dry-cycle operation.
What to Watch For in California
- !Avoid contractors who push full interior drainage systems for non-flood-plain homes — likely overselling
- !In expansive-soil areas, exterior trench drains can crack as soils heave — check soil report first
- !Verify discharge daylight outlet is not on a neighbor's property (legal issue in the Southwest)
Waterproofing Contractors in Marina del Rey
G&O Waterproofing
3305 W 21st St Apt 1, Los Angeles, CA 90018, USA
2 reviews
All Weather Waterproofing & Coating
1830 Westholme Ave APT 308, Los Angeles, CA 90025, USA
13 reviews
Kazemi & Associates Waterproofing Systems Corp.
2033 Pontius Ave, Los Angeles, CA 90025, USA
9 reviews
911 Restoration of West Los Angeles
11958 Lindblade St, Culver City, CA 90230, USA
263 reviews
Blue Waves Restoration Inc
1514 S Holt Ave, Los Angeles, CA 90035, USA
18 reviews
PuroClean of Silicon Beach
8601 Lincoln Blvd, Los Angeles, CA 90045, USA
3 reviews
Guardians Mold Removal Los Angeles
11740 Sunset Blvd #34, Los Angeles, CA 90049, USA
25 reviews
Firstchoice Foundation & Retrofitting Repair
1758 Berkeley St #C105, Santa Monica, CA 90404, USA
2 reviews
RP Service Attic Insulation
2425 Olympic Blvd suite 4000 w, Santa Monica, CA 90404, USA
22 reviews
The Attic Insulation Specialists, Inc
10940 Wilshire Blvd, Los Angeles, CA 90024, USA
137 reviews
Attic Insulation Los Angeles
10250 Santa Monica Blvd #27, Los Angeles, CA 90067, USA
15 reviews
Presto Emergency Repair
983 N La Brea Ave Suite 983, Inglewood, CA 90302, USA
2 reviews
Smart Budget Insulation of Los Angeles
5353 W Imperial Hwy, Los Angeles, CA 90045, USA
20 reviews
Comfort For Less Insulation
1140 E Franklin Ave, El Segundo, CA 90245, USA
23 reviews
ELM INSULATION & SOUND SOLUTIONS
12402 Killion St, Valley Village, CA 91607, USA
80 reviews
Dependable Restoration Inc
122 1/2 Galleon St, Venice, CA 90292, USA
2 reviews
Foundation bros
1023 1/2 Abbot Kinney Blvd, Venice, CA 90291, USA
16 reviews
Hydro Hero
1509 Abbot Kinney Blvd, Venice, CA 90291, USA
25 reviews
HomeDry
1601 N Sepulveda Blvd Ste 343, Manhattan Beach, CA 90266, USA
3 reviews
California Foundation Works
911 E 31st St Unit #A, Los Angeles, CA 90011, USA
18 reviews
RM1 Construction - Foundation Repair
10289 W Pico Blvd, Los Angeles, CA 90064, USA
3 reviews
Foundation Repair LA Inc.
9864 Glenoaks Blvd, Sun Valley, CA 91352, USA
24 reviews
A1 Residential Foundation Inspection
4143 Glencoe Ave, Marina Del Rey, CA 90292, USA
2 reviews
Foundation Experts
17547 Ventura Blvd suite 307b, Encino, CA 91316, USA
17 reviews
Sinai Construction
5142 Venice Blvd., Los Angeles, CA 90019, USA
7 reviews
AAA Fire water mold restoration inc
4500 Via Marina #120, Marina Del Rey, CA 90292, USA
1 reviews
PuroClean of West Los Angeles
2922 Pico Blvd, Santa Monica, CA 90405, USA
25 reviews
Water Away Restoration Service
66 Windward Ave #66, Venice, CA 90291, USA
34 reviews
SERVPRO of Santa Monica/Venice Beach
475 Washington Blvd, Marina Del Rey, CA 90292, USA
12 reviews
Waterproofing FAQs — Marina del Rey, California
Which companies offer crawl space waterproofing in Marina del Rey?
G&O Waterproofing (5.0★), All Weather Waterproofing & Coating (4.8★), Kazemi & Associates Waterproofing Systems Corp. (4.0★) list waterproofing in Marina del Rey. 3 of 33 local crawl space companies tag this service directly.
How many crawl space contractors serve Marina del Rey?
33 crawl space companies are listed for Marina del Rey; 911 Restoration of West Los Angeles is the highest-rated at 5.0★ (263 reviews). Pros in nearby Los Angeles and San Diego also cover the area.
How much does crawl space waterproofing cost in Marina del Rey, California?
Crawl space waterproofing in Marina del Rey, California typically costs $1,500–$5,000 for a complete interior drainage system with sump pump. Southwest — Monsoon + Flash Flood pricing reflects local labor rates and the specific drainage scope each climate demands.
Do I need an interior or exterior drainage system in Marina del Rey?
Most Southwest homes do NOT need interior perimeter drains. Exterior grading and downspout extensions handle 90% of moisture events. Reserve full systems for flood plain homes or those near washes.
What size sump pump do I need in Marina del Rey?
Skip the sump pump unless you are in a flood plain or near a wash. The dry climate means the pump rarely runs and seal degrades from disuse. If you do install one, prioritize a model rated for dry-cycle operation.
Why is exterior grading important for waterproofing in California?
The most important fix in the Southwest. 6-inch fall over 10 feet. Verify after any monsoon — soil shifts more here than wetter regions. Many Southwest waterproofing problems resolve with grading alone.
When should I schedule waterproofing in Marina del Rey?
October through April — outside monsoon season and before extreme summer heat (above 100°F crawl space temps make work dangerous).
Expected ROI
Lower than wetter regions — typical payback is 7–12 years. Primary financial benefits: avoiding one monsoon-event interior flood ($5K–$15K) and improved indoor air quality (vapor barrier alone).
Best Season to Schedule
October through April — outside monsoon season and before extreme summer heat (above 100°F crawl space temps make work dangerous).
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Also Serving Marina del Rey
Waterproofing Guides
Southwest — Monsoon + Flash Flood
Annual precipitation: 8–15 inches; 40–60% during monsoon (July–September)