How accurate are ReSharpe's property valuations?

ReSharpe doesn't publish a single accuracy number because one number hides the distribution. Instead it reports valuation bands calibrated so that roughly 80% of real closed prices fall inside the band, and rent estimates with a median error of about 7% on out-of-sample backtests against real closed leases.

Is this an automated valuation model (AVM)?

It uses AVM-style techniques (comparable sales, hedonic adjustments) but it is built for licensed agents underwriting a specific deal, not for mass appraisal. Every figure is shown with its comps and assumptions so you can audit and override it.

Does ReSharpe guarantee returns or appraisal values?

No. ReSharpe is an analysis tool, not an appraisal and not investment advice. It surfaces calibrated estimates and the data behind them; the decision and the verification are always the licensed professional's.

How often is the underlying data updated?

Active listing data is refreshed daily from live MLS data. The closed-sale and closed-lease history used for calibration grows continuously as new transactions close and sync into the model.

How accurate are AI property valuations?

Most AI real estate tools quote one accuracy percentage and bury the method. We do the opposite: here is exactly how ReSharpe calibrates its rent and value estimates, measured against real closed transactions — including where it falls short.

How accurate is it?

Short answer

ReSharpe reports two calibrated numbers instead of one marketing figure: valuation bands tuned so that about 80% of real closed prices land inside the band, and rent estimates with a median error of roughly 7% on out-of-sample backtests against real closed leases. A single “accuracy %” hides the spread; a band and a median error describe it honestly.

Accuracy is meaningless without a test design. Every number below comes from walk-forward backtests: the model is only ever allowed to see transactions that closed before the property it is estimating, then we compare its estimate to what that property actually closed or leased for. That prevents the look-ahead bias that makes most “our AI is 98% accurate” claims unreproducible.

What the model is calibrated on

Short answer

Calibration runs against more than 100,000 real closed transactions across South Florida: 46,000+ closed leases for the rent engine and 55,000+ closed sales for the valuation engine — not theoretical ranges or scraped public records.

Because the data is live MLS data refreshed daily, the calibration set grows as new deals close. The estimates you see reflect what is actually transacting in a submarket right now, weighted toward recent, nearby and like-for-like comparables rather than a flat ZIP-code average.

Data sources: Closed-transaction counts are ReSharpe's own South Florida MLS dataset (Palm Beach & Broward), as of June 11, 2026. Figures are rounded down to the nearest thousand.

Why we report medians, not averages

Short answer

Real estate distributions are skewed — one $2M outlier drags an average up and away from reality. ReSharpe uses medians for prices, rents and days-on-market so a handful of unusual deals can't distort the number you underwrite with.

Averages reward outliers; medians describe the typical deal. For a 2-bedroom condo in a given submarket, the median closed rent is a far better anchor for underwriting than the mean, which a single luxury short-term rental can inflate by hundreds of dollars.

How the 80% valuation bands work

Short answer

Instead of one point estimate, ReSharpe returns a low–mid–high band calibrated on historical error so that about 80% of real closed prices for comparable properties fell inside the equivalent band. The band is the honest version of “what is this worth” — a range you can defend, not false precision.

A point estimate pretends to a precision the data doesn't support. A calibrated band tells an agent and their client where the deal realistically sits and how much uncertainty is in it — which is exactly the conversation a financially-minded buyer wants to have.

Rent estimates: ~7% median error

Short answer

On out-of-sample backtests against real closed leases, ReSharpe's rent estimates carry a median error of about 7%. The engine blends nearby closed leases with bedroom/bath, geography and self-lease signals rather than applying a flat per-ZIP rent.

Rent is where generic tools are weakest: a ZIP-level average ignores the difference between a renovated 2/2 on the water and a dated 2/2 inland. ReSharpe estimates from the closest comparable closed leases and reports the comps it used, so the number is auditable rather than a black box.

Honest limitations

Transparency cuts both ways. ReSharpe is most reliable where the data is densest and least reliable where it is thin. Specifically:

Coverage today is South Florida (Palm Beach & Broward). We say so with pride — deep, block-by-block calibration beats shallow nationwide averages — but we don't pretend to national accuracy.
Unique or rarely-traded properties (large estates, unusual lot configurations) have fewer comparables, so their bands are wider — by design.
Estimates assume the property condition implied by the listing; a major renovation or undisclosed defect the model can't see will move the real number.
It is an analysis tool, not an appraisal and not investment advice. The licensed professional verifies and decides.

For how these numbers feed the underwriting screen, see instant deal analysis, rent estimates and the AI condo document review.

Frequently asked questions

How accurate are ReSharpe's property valuations?: ReSharpe doesn't publish a single accuracy number because one number hides the distribution. Instead it reports valuation bands calibrated so that roughly 80% of real closed prices fall inside the band, and rent estimates with a median error of about 7% on out-of-sample backtests against real closed leases.
Is this an automated valuation model (AVM)?: It uses AVM-style techniques (comparable sales, hedonic adjustments) but it is built for licensed agents underwriting a specific deal, not for mass appraisal. Every figure is shown with its comps and assumptions so you can audit and override it.
Does ReSharpe guarantee returns or appraisal values?: No. ReSharpe is an analysis tool, not an appraisal and not investment advice. It surfaces calibrated estimates and the data behind them; the decision and the verification are always the licensed professional's.
How often is the underlying data updated?: Active listing data is refreshed daily from live MLS data. The closed-sale and closed-lease history used for calibration grows continuously as new transactions close and sync into the model.

See the calibration on a real listing.

Start a 14-day trial and run any active South Florida listing through the model — comps, bands and assumptions included.

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ReSharpe is an analytics tool for licensed real estate professionals. This page is general information — not financial, investment, legal or tax advice. Verify figures and consult licensed professionals before acting.