What Affects Forensic Hydrology Audit Cost in 2026
The cost of a forensic hydrology audit comes down to scope: how much of the site is tested, how deep the testing goes and how much of the drainage system is examined. Garden Picasso, a forensic landscaping firm that diagnoses and solves stormwater management problems with nature-focused green infrastructure, fixes that scope and publishes the price: $1,500 for a Forensic Hydrology Audit.
What Drives the Cost of a Forensic Hydrology Audit?
In any site diagnostic, price follows four variables:
Test coverage: how many points on the site are tested.
Test depth: whether testing stays at the surface or reaches the full soil profile.
Drainage scope: how many catch basins and underground lines are examined.
Report depth: whether the output is a verbal opinion or a documented, certified report.
A low price usually buys less of each. A visual-only review is an opinion about what the surface shows. A measured audit is a record of what the ground does.
What Does a Garden Picasso Forensic Hydrology Audit Include?
The Forensic Hydrology Audit (FHA) is a paid diagnostic of how water moves across and through a property. Its scope is fixed:
Visual forensic scope: inspection of catch basins and underground lines for silt, collapse and blockage.
Peak-load simulation: a 100-year rain event run against the site to find the GPH rate at which the system fails.
Laser-level mapping: identification of the zones where gravity sends water toward the structure.
Certified Infrastructure Risk Report: the written diagnosis, naming the cause and the order of repair.
GPH, or Gallons Absorbed Per Hour, is the rate at which a site's soil column accepts water, measured through the full 36-inch profile rather than at the surface. The 36-Inch Soil Column is the depth of ground the audit reads. The price is stated before you book, and the full $1,500 is credited toward the design solution when you hire Garden Picasso within 30 days. See the Forensic Hydrology Audit.
How Much Does a Forensic Hydrology Audit Cost in New Orleans?
Garden Picasso's Forensic Hydrology Audit costs $1,500 in 2026. The Forensic Infrastructure Audit also costs $1,500, with a 7-business-day turnaround, and the Basic Site Audit costs $250. Each is credited in full when you hire Garden Picasso within 30 days: the two $1,500 audits toward the design solution, and the Basic Site Audit toward Basic Site Design or Basic Asset Stewardship.
How Does an Audit Differ From a Perc Test or a Soil Test?
A perc test reports how fast water drains at one hole, and it is typically required for septic permitting. A soil test reports what is in a sample. Each answers one narrow question. An audit answers the question behind them: why does the water on this site go where it goes? A perc or soil test remains the right tool when a lender, building official or permit requires a lab-certified report.
How Do You Compare Audit Quotes?
Price alone does not compare two quotes. Ask the same five questions of each firm:
What is measured? Surface observations or the full soil profile.
How deep does testing go? Surface only, or the full 36-inch soil column.
Are the drainage lines scoped? Or only the visible hardware.
What do I receive? A verbal opinion or a certified, written report.
Is the fee credited? Toward the work that follows.
A quote that cannot answer these is pricing time, not information.
What Happens After the Audit?
The audit report names the cause and the order of repair. The next step is the design solution, and a hire within 30 days carries the full $1,500 credit. A Basic Site Audit ($250) follows the same logic toward Basic Site Design or Basic Asset Stewardship. The sequence is diagnosis first, design second, so every dollar after the audit is aimed at a measured cause.
What Does It Cost to Skip the Audit?
Foundation repair in New Orleans can cost $15,000 to $40,000. Surface-Level Trauma, the damage that compaction, paving and traditional landscaping do to a site's ability to absorb water, can run unseen until a storm exposes it. A $1,500 audit sits against that cost, and it fixes the order of work: diagnose first, then design. Delay carries its own cost, because a site that holds water keeps loading the foundation, and the repair bill grows with the time the water has had.
Where Should a Commercial Property Owner Start?
Commercial owners can begin with the SOP-008 Commercial Site Diagnostic, which is free and is offered for commercial properties only. It is the entry point before a paid audit. For the commercial flood picture, read Commercial Flood Prevention in New Orleans: A Forensic Guide.
How Does an Audit Connect to Pathway First?
Every audit is skilled field work: reading soil, scoping lines, mapping water. Pathway First is Garden Picasso's social-enterprise hiring model, designed to open high-wage green-infrastructure careers to justice-involved neighbors. Audit work is the kind of skilled trade that model is designed around.
What Does a Hydrology Audit Cost: The Short Answer
A Garden Picasso Forensic Hydrology Audit costs $1,500, with a fixed scope and a 30-day credit toward the design solution. For a deeper look at what it measures, read What Is a Forensic Hydrology Audit?.
Ready to see the price against your site? Book a Forensic Hydrology Audit ($1,500), a Forensic Infrastructure Audit ($1,500, 7 business days) or a Basic Site Audit ($250). Book at gardenpicasso.com or call 504-575-8199.
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