NestPrep's PrepScore is a defensible, deterministic score. This page documents the formula in full so a Nashville-area seller, agent, or appraiser can audit it line by line.
Foundation, roof age + condition, windows, pests, mold, prior disclosures. The deal-killer surface area at inspection.
HVAC, plumbing, electrical panel, water heater, insulation, septic/sewer. Replacement-cost negotiation drivers.
Paint, flooring, kitchen, bath, fixtures, clutter. How the inside shows to a buyer walking through.
Landscape, exterior paint, gutters, hardscape, deck. The first impression that drives showings.
Realtor engagement, lender pre-approval, title chosen, pricing posture, pre-listing inspection plan, repair budget set aside. Process readiness.
The Listing-Ready Value is the projected price range a home could reasonably command after the seller resolves their PrepScore punch list. It's anchored to the seller's address-level AVM plus a directional lift derived from the PrepScore deficit.
A 50-point PrepScore deficit recovered ≈ 4.0–7.5% projected lift. This matches NAR 2025's published "unprepared sellers leave 4-7% on the table" anchor exactly. The high end is capped at 15% as a safety rail; in practice this only triggers for sellers with PrepScores below 0, which is mathematically impossible.
PrepScore is a weighted average of five home-sale dimensions: Structural Integrity 25%, Mechanical Systems 20%, Cosmetic Readiness 20%, Curb Appeal 20%, Market Readiness 15%. Within each dimension, the score is the sum of earned points divided by the sum of max points, expressed 0-100. The overall PrepScore is the weight-applied sum, rounded to an integer.
Listing-Ready Value = AVM × (1 + headroom × lift_per_point), where headroom = 100 - PrepScore. The low end uses 0.08% lift per recovered point; the high end uses 0.15%. The range is capped at 15% as a safety rail. Coefficients are calibrated against NAR 2025 data showing unprepared sellers leave 4-7% on the table.
NestPrep pulls a live AVM (automated valuation model) from industry-grade real estate data for the seller’s exact address. The AVM is anchored to the three most-similar sold homes within 0.5 miles, by correlation score. It is not a Zestimate.
No. Cost tiers ($ through $$$$$) are directional indicators of typical repair magnitude, not NestPrep quotes. Actual vendor quotes vary by market, scope, and contractor. Tiers are anchored to HomeAdvisor 2025 cost ranges + Zonda Cost vs Value 2025 — same datasets the cost-recovery engine uses internally.
Each PrepScore point a seller recovers translates to approximately 0.08-0.15% of AVM lift on their projected sale price. For a $487,000 Nashville home, every PrepScore point recovered is worth roughly $390-$730 in projected lift — directional, not guaranteed.