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Property data in the tools you use.

Research in a compatible AI assistant or integrate original-source records into your application. Quoin’s AI Connector and Developer API give you two ways to work with the data.

AI Connector

Bring property records into ChatGPT, Claude, and other compatible AI assistants through MCP. Confirm your client’s setup requirements with Quoin.

Explore AI Connector

Developer API

Use property records and source references in your own software. Ask for current documentation, available fields, and access instructions.

Explore Developer API

Property research runs through your connected assistant or application. Want a company brain or AI agents built for your team? Explore Solutions.

Look closer at a property.

Quoin connects property research to the records behind it. Check who owns an asset, what sold, and what has changed.

Ownership & sales

Follow recorded owners and transfers. A recorded owner may be an entity, not the person to contact.

Taxes & assessments

Review assessed values and tax history.

Permits & occupancy

Check filed work, licenses, and occupancy records.

Zoning & land use

Explore districts, overlays, and parcel restrictions.

Building & parcel details

Review recorded characteristics and year built.

Rental & management data

Coming soon.

How we work with source records

Start in Washington, D.C.

News covers the U.S. Quoin’s property data is live in Washington, D.C.; available records vary by property.

Washington, D.C.
Available now
Northeast U.S.
Releasing soon
Southeast U.S.
Next in line
Request your market
Explore research workflows

Guides to the questions property records can help you investigate. These describe research approaches, not a list of included fields or ready-made tools. Confirm available records and gaps for your use case.

Modern glass office facade with a precise architectural grid
Property & people

Property intelligence

Connect the building, its ownership, occupancy, transactions, and financing in one place. Turn an address into a working investment picture.

Explore
Modern office buildings around a landscaped business district
Property & people

Listings & availability

Bring available space, building context, and market evidence into the same search. Qualify the opportunity before the first tour.

Explore
A dense city corridor with mixed-use buildings and commercial towers
Property & people

Owners & portfolios

Follow ownership structures, acquisition activity, and portfolio relationships to understand who is active and where the next conversation may begin.

Explore
Desk facing floor-to-ceiling windows overlooking a city
Property & people

Tenants & occupiers

Connect companies to their locations, occupancy patterns, and leasing activity. Find the context behind a tenant requirement or a building’s income story.

Explore
Cranes and scaffolding at a large building construction site
Property & people

Public records & land use

Bring deeds, assessments, permits, and land-use records into the property story, with their origin and meaning intact.

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Professional working at a laptop beside an office window
Property & people

Companies & professionals

Connect professional identities to properties, transactions, firms, and markets. Turn a name into relevant business context.

Explore
Modern office buildings around a landscaped business district
Transactions & capital

Sales comparables

Understand what traded, on what terms, and why it belongs in your analysis. Build a valuation story that can withstand questions.

Explore
Desk facing floor-to-ceiling windows overlooking a city
Transactions & capital

Lease intelligence

Connect leasing events to buildings, tenants, terms, and competing supply. Build a clearer view of demand before negotiating the next deal.

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Commercial towers lining an urban river
Transactions & capital

Debt & financing

Connect recorded loans, lenders, maturity events, and property fundamentals. Understand the capital structure around an opportunity.

Explore
A dense city corridor with mixed-use buildings and commercial towers
Transactions & capital

Funds & capital flows

Connect fund mandates, sponsors, holdings, and transaction activity to understand where capital is concentrating and which counterparties fit an opportunity.

Explore
A dense city corridor with mixed-use buildings and commercial towers
Analysis & decisions

Market analytics

Connect supply, demand, rents, and transactions across markets, submarkets, and your own competitive sets.

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Desk facing floor-to-ceiling windows overlooking a city
Analysis & decisions

Rent benchmarking

Understand the rent, concessions, term, and expense structure behind a lease comparison.

Explore
Multi-level shopping center with a glazed architectural roof
Analysis & decisions

Lease analysis

Compare occupancy proposals, cash-flow assumptions, and decision tradeoffs before a requirement becomes a commitment.

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Cranes and scaffolding at a large building construction site
Analysis & decisions

Development pipeline

Connect planned projects, construction stages, delivery timing, and market demand to understand the supply coming next.

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Apartment community with balconies and landscaped grounds
Analysis & decisions

Portfolio & debt risk

Connect portfolio exposures with property, tenant, financing, and market intelligence to focus the next review.

Explore
Analyst reviewing a bar chart on a laptop
Research & workflow

Reports & presentations

Bring property evidence, comparable sets, market views, and assumptions into a coherent decision brief.

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Professional working at a laptop beside an office window
Research & workflow

AI research assistant

Reason across property records, investigate competing explanations, and prepare answers with evidence and uncertainty in view.

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Start with $100 in credits.

No credit card required. Available for the AI Connector and Developer API.

Signup opens an Airtable form. Usage rates and activation timing are not published here. Confirm current terms and setup requirements with Quoin.