Research & open data
Explore the 50-state records audit, downloadable data, source catalogs, open tools, and citation guidance.
Open the research library →Twellie buyer learning
Home-buyer research, without the black box.
A growing library for checking the evidence behind a property decision. Every field guide is answer-first, source-linked, printable, and explicit about what an online report cannot establish.
Free public-records utility
Find the official records for the home you are researching.
Identify the responsible state and local offices, choose the property features that matter, and build a private research plan for taxes, deeds, permits, hazards, utilities, association records, and physical checks.
Reviewed field guides
Choose the evidence question—not a keyword variation.
The library is organized around four buyer decisions. Every guide adds a distinct ledger, source trail, or verification workflow.
Price & affordability
Price, value, and the money needed to close
Compare market evidence, reconcile the facts that affect value, and plan cash, taxes, and buyer limits without collapsing them into one number.
01
Comparable-sales field guide
Read home comps before an offer
Learn how to choose, verify, compare, and reject home-sale comps before an offer. Build an evidence range without relying on a price-per-square-foot shortcut.
Read the field guide → 02 Property-report field guideRead a buyer property report
Learn how to audit a home-buyer property report: verify identity, trace sources, assess comps and ranges, separate costs, and route unresolved checks.
Read the field guide → 07 Cash-planning field guideEstimate cash to close
Build a cash-to-close range from documented loan, title, prepaid, escrow, credit, and deposit inputs before an offer—without a national percentage.
Read the field guide → 11 Property-tax evidence guideRead property-tax history
Learn how to separate assessed, taxable, and market values; trace bills, exemptions, and special assessments; and build a locally grounded tax range.
Read the field guide → 17 Home-area evidence guideVerify home square footage
Learn why home square-footage figures differ and how to reconcile listing, assessor, permit, floor-plan, survey, and appraisal evidence before buying.
Read the field guide →Records & ownership
Documents, land records, and ownership limits
Trace disclosures, title, surveys, permits, association documents, and land-use records before relying on a property's advertised rights or features.
04
Seller-disclosure field guide
Audit a seller disclosure
Learn how to audit a seller property disclosure, trace repairs and attachments, record conflicts, and route unresolved facts before buying a home.
Read the field guide → 06 Association-evidence field guideReview HOA and condo documents
Use a buyer's HOA and condo document checklist to review rules, reserves, assessments, insurance, minutes, projects, and unresolved questions.
Read the field guide → 09 Title-evidence field guideRead a title commitment
Learn how to read a title commitment's property details, requirements, exceptions, and changes, then route legal questions safely before closing.
Read the field guide → 10 Permit-records field guideCheck permits before you buy
Learn how to reconcile additions and renovations with permits, inspections, final approvals, occupancy records, and seller documents before buying a home.
Read the field guide → 12 Boundary-evidence field guideRead a property survey
Learn how to distinguish plats, parcel maps, and surveys; reconcile boundaries with title exceptions and improvements; and route unresolved land questions.
Read the field guide → 16 Land-use records field guideCheck zoning and future development
Learn how to reconcile a property's current zoning, overlays, permitted uses, pending applications, long-range plans, and nearby public projects before buying.
Read the field guide → 22 Buyer fraud-prevention field guideVerify real-estate scam red flags
Verify seller authority, property records, title and closing contacts, money requests, and wire instructions using official sources before buying a home.
Read the field guide → 24 Ownership records field guideFind an owner in official records
Use assessor, recorder, tax, court, entity, and title evidence carefully when confirming who appears in public property records.
Read the field guide →Condition & repairs
Physical systems, inspections, and completed work
Investigate condition evidence, specialist systems, repair claims, and installed equipment without treating documents as proof of present performance.
08
Inspection-and-appraisal field guide
Inspection vs. appraisal
Compare a home inspection with an appraisal, understand each report's limits, reconcile conflicting facts, and route findings before deadlines.
Read the field guide → 14 Rural-systems field guideCheck septic and well evidence
Learn how to gather septic and well records, define specialist inspections, preserve water-test integrity, and reconcile two private systems before buying.
Read the field guide → 15 Repair-evidence field guideVerify seller repairs
Learn how to trace an inspection defect through agreed scope, contractor evidence, permits, invoices, warranties, and independent verification.
Read the field guide → 19 Residential solar evidence guideBuy a house with solar panels
Verify solar ownership, financing, permits, utility records, roof work, warranties, and transfer steps before buying a house with panels.
Read the field guide → 23 Post-inspection buyer field guideRead a home inspection report
Turn a home inspection report into prioritized safety, specialist, repair, and contract questions without treating the summary as a pass-or-fail verdict.
Read the field guide → 25 Roof evidence field guideFind a roof's age before buying
Build a dated roof evidence trail from permits, invoices, disclosures, inspection findings, and insurance questions before buying a house.
Read the field guide → 26 Wastewater evidence field guideSewer-line inspection before buying
Learn how to identify sewer responsibility, collect service and repair evidence, scope a camera inspection, and track unresolved lateral questions.
Read the field guide → 27 Foundation evidence guideFoundation-crack evidence
Document foundation cracks without diagnosing them: reconcile disclosures, repairs, permits, drainage, inspection limits, and specialist findings.
Read the field guide → 28 Electrical evidence field guideElectrical evidence checklist
Reconcile panel labels, permits, recalls, repair documents, inspection limits, and insurer questions without making a DIY electrical diagnosis.
Read the field guide → 29 Heating and cooling evidence guideVerify HVAC age and service history
Reconcile HVAC equipment labels, invoices, permits, warranties, inspection limits, and replacement assumptions before buying a home.
Read the field guide → 30 Tank and environmental records guideUnderground oil-tank evidence
Trace tank identity, registration, use, closure, removal, sampling, spills, and unresolved environmental questions before buying.
Read the field guide → 31 Moisture evidence field guideMold and moisture evidence
Reconcile moisture events, disclosures, claims, repairs, permits, inspection limits, and remediation records without declaring a home mold-free.
Read the field guide → 32 Whole-home inspection field guideHome Inspection Checklist Before Buying
Plan a buyer-directed home inspection, specialist follow-up, document review, cost questions, and contract deadlines without treating one inspection as a guarantee.
Read the field guide → 33 Inspection-scope companionHome inspection scope gaps
Identify inaccessible, excluded, concealed, specialist, legal, insurance, and future-performance questions a general home inspection may leave open.
Read the field guide →Hazards & insurance
Environmental risk, loss history, and insurability
Combine official hazard screens, property-specific tests, claim questions, and written insurance evidence before deciding that a risk is acceptable.
03
Flood-evidence field guide
Check flood risk before an offer
Check a home's flood risk before buying: read FEMA maps, record map changes, ask for disclosures, inspect drainage, and obtain written insurance quotes.
Read the field guide → 05 Insurance-evidence field guideCheck insurance before you buy
Learn how to compare home insurance quotes, deductibles, exclusions, property facts, and underwriting questions before buying and budgeting.
Read the field guide → 13 Wildfire-evidence field guideCheck wildfire evidence
Learn how to combine official wildfire maps, parcel and structure evidence, community context, mitigation records, and written insurance quotes.
Read the field guide → 18 Property-claims evidence guideCheck a home's claims history
Learn how a buyer can request property claims evidence, connect each event to repair records and inspections, correct errors, and obtain a current insurance quote.
Read the field guide → 20 Radon evidence field guideCheck radon test evidence
Learn how to review a seller's radon test, plan property-specific testing, trace mitigation records, and preserve test conditions and limits before buying.
Read the field guide → 21 Public-water evidence guideCheck public water quality
Learn how to identify a public water supplier, read its quality report and violations, check service-line material, and plan property-specific testing before buying.
Read the field guide →Use the guides with the evidence.
The learning hub explains how to inspect a decision. These product and trust surfaces show what Twellie currently produces and where its limits begin.
Home-buyer checklist
Pre-offer, contingency, and closing checks that remain outside any online report.
Open the checklist →Sample property report
See the source ledger, comparable evidence, range, readiness status, and next checks.
Audit the sample →Methodology
Read the current comp selection, adjustment, evidence-range, and gating rules.
Read the methodology →Trust center
Review source statuses, calibration requirements, known limits, and corrections.
Visit the trust center →Evidence source register
See which records and datasets support a question—and what each cannot prove.
Review the sources →Apply the field guides to a real report.
Start with the sample, then decide whether Twellie's evidence and limitations fit the property you are researching.
