Basement Waterproofing Cost in Phoenix (2026)

Basements are rare in Phoenix, leading to a shortage of specialized contractors. This lack of competition drives hourly labor rates to between $190 and $220, significantly higher than in regions where basements are standard.

Yes. Unlike many other states, Arizona applies sales tax to both materials and labor. In Phoenix, homeowners must budget for a combined tax rate of 9.1% (5.6% State, 0.7% Maricopa County, and 2.8% City).

While Phoenix is a desert, the intense monsoon rains can cause rapid hydrostatic pressure against foundations. Local experts recommend exterior liquid membranes ($3–$7 per sq ft) to handle flash flooding risks that interior sealants cannot manage.

For a $10,000 project, Phoenix charges a base permit fee of $150 for the first $1,000 plus $9 for each additional $1,000, totaling $231. However, plan reviews typically double this cost, bringing the total permit-related expense to approximately $462.