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 publishes 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.

🌐 Visit website 📡 Source on GitHub

21.9/100 emerging Agent 0/100 human only Full breakdown ↓
scored 2026-07-20 · rubric v0.4

1 APIs 0 Features

CompanyConstructionBuilding PermitsContractorsReal EstateHome ImprovementProperty DataMarketplace

API Rating

API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4

Composite quality — 21.9/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 3.0 / 20

Commercial Clarity 8.9 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. 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. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

HelpCenter

HelpCenter

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

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.
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: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Construction
- Building Permits
- Contractors
- Real Estate
- Home Improvement
- Property Data
- Marketplace
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