TaxProperty - Tax Sale Intelligence Platform
AI-powered analysis of tax sale properties for professional real estate investors. Currently supporting Utah County with 127 analyzed properties for the May 2026 sale.
Features
Core Intelligence
- AI-Powered Scoring Engine - Automated Bid/Research/Avoid classification using Opportunity and Risk factors (0-100 scale)
- Max Bid Calculator - Dustin Hahn formula: (ARV × 80%) − Costs − Profit
- Portfolio Management - Track properties through your investment workflow
Due Diligence Suite (V3)
- Title Research Checklist - 8-step Dustin Hahn workflow with progress tracking
- Drive-by inspection verification
- ARV validation with comp guidance
- Tax sanity checks (payoff ratio analysis)
- Parcel ID verification via GIS
- Municipal lien risk assessment
- Chain of title review
- Occupancy status check
- Max bid calculation
- Property Intelligence - Street View imagery, aerial views, GIS parcel data
- Risk Assessment - Micro-parcel detection, entity ownership flags, environmental screening
Data & Automation
- Zoning Analysis - 25 real Utah County zoning codes + 16 city guidance modules
- Assemblage Detection - Adjacent parcel identification for micro-parcel opportunities
- Data Sync Automation - Daily redemption checking with status alerts
- Data Trust Indicators - Confidence meters showing verified vs. estimated data
Professional Tools
- Investor Reports - Committee-ready PDF generation with portfolio overview
- Multi-User Support - Google OAuth authentication with property ownership
- Bulk Actions - Re-check status, re-run auto-fill on multiple properties
Tech Stack
- Framework: Next.js 15 + React 19 + TypeScript
- Database: Prisma ORM + SQLite (PostgreSQL ready)
- Styling: Tailwind CSS + shadcn/ui
- Authentication: NextAuth.js v5 with Google OAuth
- GIS/Data: Utah County AGRC API, Google Street View API
- Scraping: Cheerio for redemption status checking
Quick Start
# Install dependencies
npm install
# Set up environment
cp .env.local.example .env.local
# Edit .env.local with your API keys
# Push database schema
npx prisma db push
# Seed with Utah County data (optional)
npx tsx scripts/import-utah-county-csv.ts
# Run development server
npm run dev
Open http://localhost:3000 to view the application.
Environment Variables
Required in .env.local:
# Database
DATABASE_URL="file:./dev.db"
# Authentication (NextAuth.js)
NEXTAUTH_URL=http://localhost:3000
NEXTAUTH_SECRET=your-secret-here
GOOGLE_CLIENT_ID=your-google-client-id
GOOGLE_CLIENT_SECRET=your-google-client-secret
# Google Maps (for Street View images)
GOOGLE_MAPS_API_KEY=your-google-maps-api-key
# Optional: Cron job security
CRON_SECRET=your-cron-secret
Available Scripts
npm run dev # Start development server
npm run build # Production build
npm start # Start production server
# Data management
npm run fetch-images # Batch fetch Street View images for all properties
npx prisma studio # Browse database visually
npx prisma db push # Apply schema changes
# Analysis
npm run rescore-all # Re-run scoring engine on all properties
npx tsx scripts/detect-assemblage.ts # Run assemblage detection
npx tsx scripts/check-redemptions.ts # Manual redemption check
Project Structure
├── src/
│ ├── app/ # Next.js App Router
│ │ ├── api/ # API routes (properties, auth, cron)
│ │ ├── dashboard/ # Portfolio dashboard
│ │ ├── properties/ # Property list and detail
│ │ ├── reports/ # Investor report generation
│ │ ├── settings/ # User preferences
│ │ └── login/ # Authentication page
│ ├── components/
│ │ ├── MaxBidCalculator.tsx # Dustin Hahn formula implementation
│ │ ├── DueDiligenceChecklist.tsx # 8-step research workflow
│ │ ├── DataTrustIndicators.tsx # Confidence scoring UI
│ │ ├── PropertyImage.tsx # Street View integration
│ │ └── AppLayout.tsx # Navigation wrapper
│ ├── lib/
│ │ ├── scoring/ # Investment scoring engine
│ │ ├── zoning/ # Zoning fetchers (cities + county)
│ │ ├── assemblage/ # Adjacent parcel detection
│ │ └── sync/ # Redemption checking
│ └── types/ # TypeScript definitions
├── prisma/
│ └── schema.prisma # Database schema
├── scripts/ # Utility scripts
└── docs/ # Documentation
Scoring Methodology
Properties are scored 0-100 using:
Opportunity Factors (+):
- Market value vs. tax amount (equity spread)
- Absentee owner bonus
- Buildability score from zoning
- Assemblage opportunity (adjacent parcels)
Risk Factors (-):
- Micro-parcel penalty (< 2000 sq ft, -40 points)
- Entity-owned (LLC/CITY/HOA, -15 points)
- Access/title/legal/marketability risks
- Pre-sale volatility (status changes)
Recommendations:
- BID (70+): Strong candidates with verified data
- RESEARCH (55-69): Potential opportunities needing verification
- AVOID (<55): Disqualifying issues
Current Data: Utah County May 2026
| Metric | Value |
|---|
| Properties Analyzed | 127 |
| Street View Coverage | 119 (93.7%) |
| Sale Date | May 21, 2026 |
| Unincorporated (Real Zoning) | 25 |
| City Properties (Guidance) | 102 |
| BID Recommendations | ~20-30 |
V3 Roadmap
Features implemented and ready:
- Authentication & Multi-User - NextAuth.js with Google OAuth
- Max Bid Calculator - Interactive ARV-based bidding tool
- Due Diligence Checklist - 8-step title research workflow
- Assemblage Detection - Adjacent parcel analysis
- Data Sync Automation - Daily redemption checking
- City Zoning Fetchers - 16 city modules ready for activation
Contributing
This is a proprietary platform for TaxProperty Intelligence LLC. Not open for external contributions.
License
Proprietary - All rights reserved.
TaxProperty Intelligence - Know which properties to bid. Ignore the rest.
