Basement Waterproofing Cost in Los Angeles, CA
Based on 47 basement waterproofing building permits filed in Los Angeles between 2020 and 2026, the typical declared project value is $10,000, with most landing between $6,333 and $15,750. These are real records from Los Angeles's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Basement Waterproofing values over time in Los Angeles
Median declared value moved from $6,333 in 2022 to $12,500 in 2025, up 97% over that span. Each year below is computed from the filings that actually cleared in Los Angeles.
Recent basement waterproofing permits in Los Angeles
Actual filings from Los Angeles's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-05-15 | $12,000 | WATERPROOF DECK & REPLASTER SWIMMING POOL |
| 2025-07-28 | $25,000 | EPLAN: REPAIR AND WATERPROOF (18) BALCONY DECKS TO (E) CONDOMINIUM BUILDING. ALL WORK DONE |
| 2025-07-18 | $10,000 | REPLACE WATERPROOF MEMBRANE AND FLOOR FINISH AT BALCONY AND REMOVE AND REPLACE PORTION OF |
| 2025-07-01 | $8,000 | eplan Demolish waterproof membrane and plywood sheathing at existing balcony to inspect st |
| 2025-06-06 | $40,000 | ePlan. Temporary shoring to waterproof exterior of (E) SFD. |
| 2025-04-28 | $4,000 | WATERPROOF THE 19' X 14' TOP OF THE (E) DET. GARAGE |
| 2025-04-23 | $10,000 | REPAIR AND WATERPROOF EXISTING BALCONY DECK. |
| 2025-02-13 | $15,000 | SPECIFICATION OF DECK WATERPROOF SYSTEM***"COMPLY WITH DEPARTMENT ORDER effective date 03/ |
| 2025-01-21 | $15,000 | WATERPROOF WALKWAYS WITH ICC APPROVED PLIDEK SYSTEMS (ESR2097) AND REPAIR JOISTS AT APARTM |
| 2024-12-20 | $6,000 | WATERPROOF THE (E) BALCONY AT (E) APT BUILDING |
| 2024-11-19 | $35,000 | VOLUNTARY UPGRADE WATERPROOF & INSTALL NEW SUB DRAIN PER PLAN. |
| 2024-10-28 | $8,000 | BALCONY DECK REPAIR PROJECT. ADD NEW BEAMS AND WATERPROOFFING. NO ADDITIONAL SQUARE FOOTA |
| 2024-10-03 | $4,000 | REPLACE WOOD POST AND WATERPROOF (E) DECK. |
| 2024-09-30 | $4,000 | WATERPROOF PORTION OF APARTMENT BUILDING PER IAPMO ER-587 AT 2ND FLOOR, UNIT #202. |
| 2024-04-04 | $10,000 | EPLAN Scope: Work to remove and replace damaged existing walkways decking, beams and prov |
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Add your price →How to read these numbers
A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What basement waterproofing actually costs in Los Angeles comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Los Angeles's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Los Angeles homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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