Waterproofing in Los Angeles: what to know
Los Angeles is dry and warm most of the year, with hot inland summers and a short rainy season in winter. Homes range from mid-century single-family houses in the Valley to hillside homes and dense apartments, and hard water is common.
- Winter storms can expose leaks in stucco, windows and hillside retaining walls.
- Monsoon and winter storms are short but intense, and flat roofs and parapet walls are common leak points.
How much does waterproofing cost?
- Basement waterproofing: $3,300 – $11,100
- Sump pump installation: $890 – $2,200
- Sump pump repair: $170 – $550
Estimate only. Typical price ranges based on public US cost data, adjusted by state. Your actual quote comes directly from the pro and depends on your home and the job.
Get a quote from a local pro →How it works
Where is water entering, when does it happen, and has the area been repaired before? Describe the problem, add your ZIP code and when you need help, and we look for an available local professional in the Los Angeles area. The request takes about 2 minutes, is free, and your address stays private until a professional is assigned.
Frequently asked questions
Do I need a permit for waterproofing work in Los Angeles?
Interior sealing usually does not need a permit, but excavation, new drains or sump pump discharge lines may. In Los Angeles, permits are typically handled by the Los Angeles Department of Building and Safety (LADBS). Rules change, so confirm with them before work starts.
Which parts of Los Angeles do you cover?
Requests are accepted from anywhere in the Los Angeles area, including San Fernando Valley, Hollywood, Westside, South LA and Eastside. Availability depends on local professionals in your ZIP code.
How much does waterproofing cost in Los Angeles?
Typical price ranges for California are shown in the cost estimate above. The final price depends on the job, materials and access, and the professional gives you a quote before any work begins. Sending a request is free.