Know your property’s true flood risk — before it costs you.
Property-specific flood risk analysis for Florida homebuyers, owners, and investors that goes beyond the FEMA flood zone map — elevation, storm surge, and future risk, read by a Certified Floodplain Manager with nothing to sell you but clarity.
- Independent & unbiased
- Property-specific analysis
- Certified Floodplain Manager
Ray Deschler, CFMFounder & Certified Floodplain ManagerUnderstand what flood risk actually means for this property.
Groundswell Flood Advisory is an independent consulting service helping you understand a property’s true flood risk before a major financial decision. Advisory and analytical — not an engineering firm, insurance company, or contractor.
Property-specific, not zone-generic
We analyze elevation, terrain, and site conditions for your exact parcel — not just the FEMA flood zone the whole block shares.
Independent and objective
We sell no insurance, construction, or mitigation products. The guidance is unbiased, with nothing to upsell.
Clear, plain-English findings
Expert interpretation of flood data, translated into what it actually means for this property — no engineering jargon.
Built for confident decisions
A second opinion outside of insurance or contractor sales, so you can buy, hold, or invest with clarity.
A flood zone is a starting point, not an answer.
FEMA Flood Insurance Rate Maps are public, useful, and drawn for insurance rating at a community scale. Groundswell starts where the map stops: with the elevation, terrain, surge exposure, and drainage of one specific parcel.
See what each assessment coversWhat a FEMA flood zone tells you
Zone letter
Whether the parcel sits in a Special Flood Hazard Area (Zones A and V) or a moderate-to-minimal risk zone (Zone X).
1% annual chance
The mapped extent of the so-called 100-year flood — a 1-in-100 chance in any given year, roughly a 1-in-4 chance over a 30-year mortgage.
Base Flood Elevation
In AE and VE zones, the modeled water surface elevation the base flood is expected to reach.
Lender requirement
Whether a federally backed mortgage will require flood insurance on the property.
What it doesn’t tell you
Your parcel's elevation
Zones are drawn at a community scale. Two homes on the same street can sit several feet apart in elevation and carry very different real-world risk.
Storm surge and high tide
Surge depth, tidal flooding, and how far water actually pushes inland during a named storm are not what a zone letter is built to show.
How risk is trending
Sea level rise, rainfall intensity, and future outlook are not reflected in a map that may be years old.
What to do about it
A zone label says nothing about which mitigation steps are worth making for this structure, in what order, or at what cost.
Three levels of insight, tailored to your decision.
Every engagement starts with your property address or parcel number. Choose the depth that fits where you are.
Flood Risk Snapshot
An entry-level assessment designed for early-stage buyers or homeowners seeking quick clarity about a property's flood exposure.
- FEMA flood zone analysis
- Base flood elevation review
- Estimated parcel elevation and surrounding terrain analysis
- Key flood risk indicators
- + 3 more
Comprehensive Flood Risk Assessment
A more detailed property analysis designed for serious buyers, higher-value homes, or clients wanting deeper insight into current and future flood risk.
Everything in the Flood Risk Snapshot, plus:
- Storm surge analysis
- Riverine flooding review
- High tide flooding exposure
- Sea level rise considerations
- + 4 more
Flood Resilience & Mitigation Plan
A premium advisory service focused on long-term flood resilience and smart mitigation investments.
Everything in the Comprehensive Assessment, plus:
- Customized mitigation recommendations
- Property-specific resilience strategies
- Estimated cost ranges
- Prioritized action roadmap
- + 2 more
From address to answer in four steps.
No site visit is required to begin. Everything starts with a property address or parcel number.
- 01
Submit your property
Send a property address and/or parcel number. That's all we need to begin.
- 02
Select your service
Choose the Snapshot, Comprehensive Assessment, or Resilience & Mitigation Plan.
- 03
Receive a detailed report
A clear, report-style analysis of the property's flood risk, in plain English.
- 04
Review together
An optional consultation to walk through findings and recommendations.
Ray Deschler, CFM — independent, unbiased, and grounded in the data.
Municipal floodplain management experience, a background in hydrology, GIS analysis, and climate resilience — and no insurance, construction, or mitigation products to sell.
- Nationally Certified Floodplain Manager (CFM)
- Municipal floodplain management experience
Serving Florida’s most flood-exposed coastlines.
Fourteen counties across three regions, including every municipality and unincorporated area within them.
- Tampa Bay AreaHillsborough · Pinellas · Manatee · Sarasota · Pasco · Hernando
- Southwest FloridaLee · Collier
- East Coast FloridaBrevard · Volusia · Flagler · Duval · St. Lucie · Martin
Flood risk, answered plainly.
What a zone letter does and doesn’t mean, when to order a review, and what Florida now requires sellers to disclose.
All questionsA FEMA flood zone tells you which mapped hazard area a parcel falls in at a community scale. A property-specific flood risk assessment starts there and adds what the map leaves out: the parcel's estimated elevation relative to the Base Flood Elevation, surrounding terrain and drainage, storm surge and tidal exposure, and how that risk is likely to trend. The result is a plain-English read on this property, not just its zone letter.
Start with your property.
Send an address or parcel number and we'll help you choose the right level of review.