Building Permits Scraper - National Construction Permit Aggregator

Aggregate US building and construction permits across 15 major jurisdictions — NYC, LA, Chicago, Austin, San Francisco, Seattle, Dallas, Philadelphia, and more — into one normalized dataset. Returns permit type, valuation, geocoded address, contractor, owner, and large-project / new-construction flags drawn from roughly 10 million public records.

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Building Permits Aggregator Features

• Covers 15 US jurisdictions out of the box, spanning every major region from the Northeast to the Pacific. The registry grows by adding one entry per city.
• Normalizes disparate open-data schemas (Socrata SODA v2, CARTO SQL) into a single 25-field output model. No per-city post-processing.
• Round-robin pagination distributes results across jurisdictions — you see permits from every requested metro before any one dominates the budget.
• Filters by issue date range, minimum valuation, new-construction-only, and state. Tags large projects above a configurable threshold.
• Geocoded output: latitude/longitude on every record that the source portal publishes them on.
• Pure API access — no browser, no CAPTCHA. Just JSON.

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What Can You Do With National Permit Data?

• Construction lead generation — Pull issued residential or commercial permits by metro, filter by valuation, and feed them into a CRM the same day.
• Contractor sales (roofing, solar, HVAC) — Target homeowners whose permit descriptions reference re-roofing, solar installation, or HVAC replacement. The raw description field makes this easy.
• PropTech and real-estate intelligence — Track building-activity trends by ZIP, by contractor, or by owner across metros without maintaining 15 separate ETL pipelines.
• Commercial GC market intel — Use the is_large_project flag and minValuationUsd filter to isolate commercial-scale permits in a region.
• Insurance and appraisal workflows — Pair permit history with property records to validate improvements, flag unpermitted work, or score risk.

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How the Aggregator Works

1. Pick a set of jurisdictions by slug (nyc, los-angeles, chicago, austin, ...) or by state (CA, TX, NY) — or leave both empty to pull from every supported metro.
2. Optionally set an issuedAfter / issuedBefore date range. The aggregator adds the appropriate $where clause per jurisdiction.
3. It round-robins through the jurisdictions, fetching a page of permits from each in turn. Pagination, rate limiting, and per-city transformation all happen automatically.
4. Records come back in a single flat schema, ready for a warehouse, a CRM, or a CSV export.

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Input

{
    "jurisdictions": ["nyc", "los-angeles", "chicago"],
    "issuedAfter": "2025-01-01",
    "minValuationUsd": 50000,
    "maxItems": 500
}

Field	Type	Default	Description
jurisdictions	array[string]	(all)	City/metro slugs. See supported list below.
states	array[string]	—	2-letter state codes. Expands to every supported metro in the state.
issuedAfter	string	2025-01-01	YYYY-MM-DD lower bound on issue date.
issuedBefore	string	""	YYYY-MM-DD upper bound on issue date. Empty = no upper bound.
minValuationUsd	integer	0	Drop permits with declared valuation below this.
onlyNewConstruction	boolean	false	Keep only permits normalized as new (excludes repairs, alterations, demolitions).
largeProjectThresholdUsd	integer	100000	Sets the is_large_project tag threshold. Does not filter.
maxItems	integer	100	Maximum records to return across all jurisdictions.

Supported Jurisdictions

Slug	Metro	State
nyc	New York City (DOB NOW Approved Permits)	NY
los-angeles	Los Angeles	CA
chicago	Chicago	IL
austin	Austin	TX
san-francisco	San Francisco	CA
seattle	Seattle	WA
dallas	Dallas	TX
philadelphia	Philadelphia (CARTO SQL API)	PA
new-orleans	New Orleans	LA
baton-rouge	Baton Rouge	LA
cincinnati	Cincinnati	OH
mesa	Mesa	AZ
san-diego-county	San Diego County	CA
montgomery-county-md	Montgomery County	MD
fort-collins	Fort Collins	CO

Example: pull one metro, high-value projects only

{
    "jurisdictions": ["los-angeles"],
    "issuedAfter": "2024-01-01",
    "minValuationUsd": 500000,
    "maxItems": 1000
}

Example: sweep every California jurisdiction

{
    "states": ["CA"],
    "issuedAfter": "2025-01-01",
    "maxItems": 5000
}

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Building Permits Output Fields

{
    "permit_id": "M01370970-S1-PL",
    "source_jurisdiction": "nyc",
    "source_url": "https://data.cityofnewyork.us/Housing-Development/DOB-NOW-Build-Approved-Permits/rbx6-tga4",
    "permit_type": "alteration",
    "permit_type_raw": "Plumbing",
    "sub_type": "",
    "work_class": "Plumbing",
    "description": "PLUMBING WORK IN CONJUNCTION WITH INTERIOR RENOVATION OF APARTMENT 15CD.",
    "status": "Permit Issued",
    "issued_date": "2026-04-17",
    "application_date": "2026-04-12",
    "finaled_date": "2026-05-19",
    "valuation_usd": 18000,
    "address": "400 WEST 12 STREET",
    "city": "New York",
    "state": "NY",
    "zip": "10014",
    "lat": 40.7371,
    "lng": -74.009934,
    "parcel_apn": "640-7501",
    "owner_name": "Justin Minskoff",
    "applicant_name": "EDUART KULLA",
    "contractor_name": "AQUEDUCT MECHANICAL CORP",
    "contractor_license": "002532",
    "is_new_construction": false,
    "is_large_project": false
}

Field	Type	Description
permit_id	string	Jurisdiction-assigned permit number (primary key within source).
source_jurisdiction	string	Slug of the jurisdiction that produced this record (nyc, los-angeles, etc.).
source_url	string	Human-readable URL for the source dataset on the city portal.
permit_type	string	Normalized type: new, addition, alteration, demolition, repair, or other.
permit_type_raw	string	Raw permit-type string from the source (useful when you need the original city taxonomy).
sub_type	string	commercial, residential, or mixed when the source exposes it.
work_class	string	Work-class / scope category straight from the source.
description	string	Free-text description of the work.
status	string	Permit status (issued, finaled, expired, etc.) as reported by the source.
issued_date	string	Date the permit was issued (YYYY-MM-DD).
application_date	string	Date the permit was filed / applied for.
finaled_date	string	Date the permit reached final status, when available.
valuation_usd	number	Declared project valuation in USD. 0 if the source doesn't publish it.
address	string	Street address of the project.
city	string	City of the project.
state	string	Two-letter state code.
zip	string	ZIP / postal code.
lat	number	Latitude (WGS84).
lng	number	Longitude (WGS84).
parcel_apn	string	Parcel / APN / tax-assessor ID when available.
owner_name	string	Property owner name when published.
applicant_name	string	Permit applicant name when published.
contractor_name	string	General contractor / business name when published.
contractor_license	string	Contractor state license number when published.
is_new_construction	boolean	true when permit_type normalizes to new.
is_large_project	boolean	true when valuation_usd meets or exceeds largeProjectThresholdUsd.

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FAQ

How do I scrape building permits across multiple US cities?

Building Permits Aggregator ships with a registry of 15 jurisdictions and normalizes them into a single schema. Pick jurisdictions by slug, by state, or leave both empty to hit every supported metro in a single run.

How much does Building Permits Aggregator cost to run?

Building Permits Aggregator runs on pay-per-event pricing: $0.10 per actor start plus $0.001 per record. A 10K-permit metro sweep is about $10 including start. A 500K-permit national pull is about $500.

Can I filter by valuation or project type?

Yes. minValuationUsd drops records below a threshold. onlyNewConstruction restricts to permits normalized as new construction. largeProjectThresholdUsd controls the is_large_project tag that commercial-GC users typically filter on downstream.

What's the difference between permit_type and permit_type_raw?

permit_type is the normalized value — one of new, addition, alteration, demolition, repair, or other — so you can query consistently across cities. permit_type_raw is whatever the source portal shipped, for when you need the original taxonomy.

Which cities are coming next?

The most-requested additions are Boston, Houston, San Jose, Miami, and Denver. Boston is currently blocked by Cloudflare on its CKAN endpoint; the rest depend on per-city API research. File a request for the metro you need.

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Need More Features?

Need a city that isn't in the registry, contractor-license cross-references, or a custom field? File an issue or get in touch.

Why Use the Building Permits Aggregator?

• One schema, fifteen cities — You write one query and get normalized results from NYC, LA, Chicago, and a dozen more. No per-city ETL.
• Cheap to run — $0.001 per record. A full metro sweep is coffee money, not a budget line item.
• Built for the lead-gen workflow — is_new_construction, is_large_project, minValuationUsd, and geocoded addresses cover the filters that construction, roofing, solar, and insurance vendors ask for.

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Further reading: Building Permit Data and Property Records: Where to Get Them in Bulk