Tools
22 deterministic calculators: rent schedules, net effective
rent, proposal comparison, percentage rent, CAM reconciliation,
debt sizing, ASC 842 remeasurement, prepayment and defeasance,
WALT, NPV, IRR, lease vs. own, renew vs. relocate, hotel
metrics, property DCF pro forma, direct cap, loan amortization,
LP/GP equity waterfalls, 1031 exchange checks, multifamily rent
rolls, capital expenditure recovery, and building-wide CAM.
Every result carries steps (the audit trail),
warnings, and a versioned formula ID such as
calc.net_effective_rent@1.
Stable FactLot IDs for parcels, legal entities, buildings (from
the street address), spaces, and documents, computable offline;
leases get IDs minted by a registry. A fact schema in which
every claim carries its provenance (document, page, clause,
method) and its AI-use rights.
Calculators
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ID specification
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Fact model
Registry
Parcel to owner of record to registered entity, from public
records only. Every fact cites the public file it was read from,
with the record locator, the publisher's licence, and its AI-use
and redistribution status.
- Commercial parcels
- 1,953,805
- Registered entities
- 14.2 M
- Verified sources
- 42
Loaded in full on 2026-11-03 across 405 counties in 21 states
and the District of Columbia: the largest metros (Harris,
Dallas, Tarrant, Travis, New York City, Los Angeles, Boston, San
Francisco, Denver, Charlotte, Minneapolis, DC), the rest of the
top 100 counties where the licence allows, and every county of
New York State, Maryland, Wisconsin, Massachusetts, Vermont,
Arkansas and Connecticut, most of Utah, 24 Minnesota counties,
and Montana's apartments and industrial parcels. Entity
registries from Texas, New York, Colorado, Pennsylvania, DC and
Connecticut. Commercial, industrial, and multifamily parcels
only; some public files omit owner names.
The pipeline also holds zoning, recorded sales, deeds and
mortgages, energy benchmarks, CMBS loan data and 6,994 federal
lease comps for the metros the
coverage page
lists. What you can query today: the downloadable District of
Columbia sample (18,077 parcels) and the GSA lease comps on your
own FactLot. The full registry is built and verified in the
project's pipeline; hosted registry lookups are not open yet.
Registry
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Source catalog
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Try it: DC sample (23.4 MB)
Rules and document verification
Rules packs turn jurisdiction law into code. Each pack cites its
statute, carries a version, and stays draft until a
maintainer has checked it against the official text; the pack
records who checked it and when. One pack is verified today: the
Texas property-tax protest deadline (checked 2026-11-02).
Document verification checks what your agent reads from a lease.
Your agent extracts each term with its verbatim quote and page;
FactLot confirms the quote is on that page and states the value
("$1,250,000.00", "June 30, 2031", "five percent (5%)") and
returns a cited fact, or the reason it could not. It also builds
a current-state abstract with amendment precedence, compares an
estoppel or rent roll to the lease, and checks a single claim.
No model runs on our side, and the checks are textual: they do
not find terms your agent missed. Live on the hosted API;
nothing is stored. It also spreads a T-12 onto a published chart
of accounts with every line cited, checks a proposed use against
a center's exclusives, and packages verified facts so a
counterparty can check them, signed with your own key.
Rules packs
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Lease ingestion
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Document verification