/// PROPRIETARY VALUATION ENGINE
LOVE THE HOME.
TRUST THE ASSET.
There is a difference between a house you "like" and an investment that "performs." The GRIFFIN Index™ is a high-fidelity audit designed to reveal the financial truth behind the listing.
System Status: Online [FEB 2026]
The 5-Year Stress Test
Most buyers focus on the kitchen finishes. We measure the capital liabilities. The Index Algorithm ingests over 40 distinct data points to expose what the listing photos hide.
The Water Gap
Generic portals treat "Canal View" and "Open Bay" as equals. We know the difference is $600k. The Index adjusts for 5 tiers of waterfront quality and navigability.
The Tax Reset
Zillow shows you the previous owner's taxes. We calculate the "Tax Reset" (approx 1.5% of purchase price) so you know your true carry cost on Day One.
The CapEx Risk
A 16-year-old roof is a $50k liability. While listing agents call it "maintained," the Index Engine automatically depreciates the asset value to protect your entry basis.
We Don't Guess.
We Calculate.
When you click "Reveal Intrinsic Value," you aren't getting a rough estimate. You are accessing a live Dossier processed by the Index Engine.
Frequently Asked Questions
No. An appraisal is a retrospective look at sold data to justify value to a lender. The Griffin Index is a prospective analysis of asset risk, carry cost, and replacement value designed to protect the buyer's equity position.
The Index Engine is currently calibrated specifically for the Sarasota, Manatee, and Barrier Island markets (Siesta, Longboat, Casey Key). We do not deploy it in markets where we lack hyper-local data fidelity.
No. The Desk Audit is a complimentary diligence service provided to qualified buyers who are actively engaged with the GRIFFIN Advisory team.