Basement Waterproofing Cost in Phoenix (2026)
Average cost in Phoenix
$1,400 – $30,000
$3 – $10 per sq ft
In Phoenix, the average is $7,165 and most projects cost between $1,400 and $30,000, or about $3 – $10 per sq ft. Prices are before tax and based on 7 sources.
Cost Breakdown
ItemizedSkilled trades and excavation
45%
Sealants, membranes, and pumps
35%
Excavators and specialized tools
10%
City of Phoenix regulatory fees
5%
Debris removal and soil grading
5%
Sales Tax at 5.6%
📋What's Included
ScopeTypically Includes
- Interior drain tile system
- Sump pump installation
- Vapor barrier
- Crack injection sealing
- Labor
Typically Excludes
- Exterior excavation waterproofing
- Foundation repair
- Mold remediation
- Dehumidifier
- Landscaping restoration
Based on interior waterproofing for a standard 800-1,000 sq ft basement.
🧮Estimate your project
LiveYour estimate in Phoenix
Likely range $3,224 – $15,763
- Labor45%$3,224
- Materials35%$2,508
- Equipment Rental10%$717
- Permits & Inspections5%$358
- Disposal & Site Prep5%$358
Interior sealant
$7,165
Interior drainage / weeping tile
$11,464
Exterior excavation
$17,196
Calibrated to 7 researched sources for Phoenix. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$6,772
Today
$7,165
Basement Waterproofing in Phoenix is ↑ 5.8% compared to roughly a year ago — about $393 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Waterproofing Contractors in Phoenix
Verified providersGroundworks Foundation Repair Phoenix
2639 W Lone Cactus Dr, Phoenix, AZ 85027, USA
228 reviews
Concrete Repairman® Foundation Repair
516 E Laguna Dr, Tempe, AZ 85282, USA
270 reviews
Doan Restoration of Arizona
1950 E Watkins St #140, Phoenix, AZ 85034, USA
502 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Basements are rare in Phoenix (found in less than 5% of homes), leading to a shortage of specialized local contractors. This scarcity, combined with regional labor rates averaging $200 per hour, often results in project costs that are 10-15% higher than the national average.
Intense seasonal rainfall requires high-capacity systems. Homeowners often invest $1,200 to $2,500 in professional sump pump installations and $30 to $90 per linear foot for exterior French drains to manage flash flood risks during the July-September monsoon period.
The City of Phoenix requires permits for excavation and structural changes. Fees start at $150 for the first $1,000 of project value, plus $9 for each additional $1,000 up to $10,000. For projects exceeding $10,000, the base fee is $231 plus $8 per additional $1,000.
Yes. For the many slab-on-grade homes in Phoenix, liquid membranes and weeping tiles are used to prevent moisture intrusion. These services typically range from $3 to $10 per square foot, providing essential protection against the region's expansive clay soils.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 1 months ago. Updates run weekly. All costs in USD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.