jaspector
§ 001 The root

Construction
knowledge,
explained.

Construction rules are written in code books, state board handbooks, and local PDFs that most people never find. Jaspector reads them collectively — then explains what they mean, jurisdiction by jurisdiction in a knowledge graph, so contractors and homeowners get a real answer before they build.

Browse by state How the knowledge graph is built
Compatible with IBC 2024 · IRC 2024
§ 002   Table of contents

The knowledge graph, mapped.

Seven top-level sections cover the full lifecycle of a construction project — from the code that governs it, to the permit that authorizes it, to the contractor who performs it, to the inspection that closes it out. Every entry is cross-referenced.

2.01
Building Codes
IRC 2018, 2021, 2024 — plain-English, section-linked.
2.02
State Contractor Licensing
All 50 state boards, classifications, requirements.
2.03
Local Building Permits
City and county permit offices, fees, and submission contacts.
2.04
Construction Wiki
Terminology, materials, installation methods.
2.05
Courses
Homeowner 101, contractor workflows.
2.06
Articles
Long-form guides, field notes, editorials.
2.07
Contract Templates
State-specific contractor agreement templates.
§ 003   Who it's for

One graph, both sides.

The same graphed knowledge serves different queries depending on who's asking. Pick your role — the relevant entry points surface below.

USE CASE · 01

Verify before you quote. Lower callbacks, fewer surprises.

Permit requirements, code citations, and licensing rules change by jurisdiction. Check what applies before you quote or pull.

All 50 states · IRC 2018 / 2021 / 2024
01
IRC code library — 1,073 entries
Plain-English explanations with section references for field lookup.
→ 02
Permits by jurisdiction — 24,532
Fees, timelines, and submission contacts before you quote.
→ 03
Licensing requirements — 50 states
Classifications, exams, and board contact information.
→ 04
Agreement templates — 50
Scope, payment terms, change orders, dispute resolution.
→
§ 004   State directory

Every state. Every jurisdiction.

Each state page explains what code edition applies, which board issues licenses, and where to pull permits — down to every city and county. We verify with each individual jurisdiction yearly.

50 / 50 shown
§ 005   Change log

Maintained, continuously.

Building codes get adopted. Fee schedules change. License classes get renamed. Our editors catch each one and record it here — so you always know how current the entry is.

See more writing & field notes →
§ 006   Methodology

How the knowledge graph is built.

We publish our sourcing, review cadence, and corrections policy so you can evaluate a claim before relying on it.

01 Where does the source data come from? ▸
Primary sources: state licensing boards, city and county permit offices, and the official ICC model code text. Every claim has a sourced reference that appears on the entry page. Our editors periodically verify directly with local jurisdictions to confirm accuracy.
02 How often are entries reviewed? ▸
Fee schedules: annually. Permit process changes: quarterly or on notification from the jurisdiction. Code edition releases: within 30 days of publication. Every page shows its last-reviewed date in the header.
03 How do corrections work? ▸
Each page has a "Flag this entry" button. Verified submissions are addressed within 48 hours. Jurisdiction staff have an expedited channel at hi@jaspector.com.
04 Is this a substitute for professional advice? ▸
No. Jaspector publishes educational reference content. For binding interpretations of code or legal questions, consult the AHJ, a licensed professional, or counsel.
§ 007   Access

Start at the top of the graph, or search for what you need.

Browse free
All permit guides
→