BuildZoom website screenshot

BuildZoom

BuildZoom connects homeowners and property owners with vetted local general contractors, using data-driven matching across profiles for 4M+ licensed contractors and construction-permit history spanning hundreds of millions of projects. Alongside the contractor marketplace, BuildZoom operates the Building Permit Database (buildzoomdata.com) — a normalized dataset of 350M+ building permits covering 25+ years, 2,400 jurisdictions, and 90% of the US population, plus 6M+ licensed contractors. That data is delivered through bulk data exports (weekly/monthly, full and incremental), a RESTful Data API with batch requests and sub-second latency for property permit history and contractor license/permit lookups, a Data Explorer web app, and a Permit Map. BuildZoom is backed by Andreessen Horowitz (a16z) and Y Combinator.

BuildZoom is listed with 1 API on the APIs.io network. Tagged areas include Company, Construction, Building Permits, Contractors, and Real Estate.

BuildZoom’s developer surface includes engineering blog, pricing, support, and 9 more developer resources.

18.4/100 emerging ▬ flat Agent 0/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
1 API
CompanyConstructionBuilding PermitsContractorsReal EstateHome ImprovementProperty DataMarketplace

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/buildzoom: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

BuildZoom Data API

RESTful Data API over BuildZoom's Building Permit Database — property permit history and contractor license/permit information, with batch requests and sub-second latency. Deliv...

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Buildzoom Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 1

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: buildzoom
name: BuildZoom
description: BuildZoom connects homeowners and property owners with vetted local general contractors, using data-driven matching
  across profiles for 4M+ licensed contractors and construction-permit history spanning hundreds of millions of projects.
  Alongside the contractor marketplace, BuildZoom operates the Building Permit Database (buildzoomdata.com) — a normalized
  dataset of 350M+ building permits covering 25+ years, 2,400 jurisdictions, and 90% of the US population, plus 6M+ licensed
  contractors. That data is delivered through bulk data exports (weekly/monthly, full and incremental), a RESTful Data API
  with batch requests and sub-second latency for property permit history and contractor license/permit lookups, a Data Explorer
  web app, and a Permit Map. BuildZoom is backed by Andreessen Horowitz (a16z) and Y Combinator.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://media.buildzoom.com/filestack/image/wqbUmQhIT6SVewUC4qcK
url: https://raw.githubusercontent.com/api-evangelist/buildzoom/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Construction
- Building Permits
- Contractors
- Real Estate
- Home Improvement
- Property Data
- Marketplace
tags_raw:
- Company
- Construction
- Building Permits
- Contractors
- Real Estate
- Home Improvement
- Property Data
- Marketplace
- Real-Estate
apis:
- name: BuildZoom Data API
  description: RESTful Data API over BuildZoom's Building Permit Database — property permit history and contractor license/permit
    information, with batch requests and sub-second latency. Delivered as part of the buildzoomdata.com data product (bulk
    exports, Data Explorer, and Permit Map are the sibling delivery channels). API access and developer documentation are
    gated behind a buildzoomdata.com account.
  humanURL: https://www.buildzoomdata.com/
  baseURL: https://api.buildzoomdata.com
  tags:
  - Building Permits
  - Contractors
  - Property Data
  properties:
  - type: Website
    url: https://www.buildzoomdata.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/buildzoom-domain-security.yml
- type: LLMsTxt
  url: llms/buildzoom-llms.txt
- type: Website
  url: https://www.buildzoom.com/
- type: DeveloperPortal
  url: https://www.buildzoomdata.com/
- type: Blog
  url: https://www.buildzoom.com/blog/
- type: Pricing
  url: https://www.buildzoom.com/subscriptions
- type: Login
  url: https://www.buildzoomdata.com/user/sign_in
- type: Support
  url: https://www.buildzoom.com/help
- type: HelpCenter
  url: https://www.buildzoom.com/contact-us
- type: GitHubOrganization
  url: https://github.com/buildzoom
- type: TermsOfService
  url: https://www.buildzoomdata.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.buildzoomdata.com/privacy-policy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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