All the rules in one place.

AIA Contract Documents

Industry-standard owner–contractor and owner–architect agreements. A201, B101, G702/G703, and more.

ConsensusDocs

Collaborative contract documents written by a coalition of over 40 construction associations — an alternative to AIA forms.

Federal Acquisition Regulation (FAR)

Governs all federal government procurement contracts. Required reading for any contractor pursuing public work.

eCFR — Construction Contracts (48 CFR)

Federal Acquisition Regulations in full — searchable, live-updated Code of Federal Regulations.

International Code Council (ICC)

Home of the IBC, IRC, IFC, IMC, and all I-Codes. Browse the current edition online for free.

ICC Free Code Access

Browse current I-Code editions online at no cost. Download requires purchase.

UpCodes — Code Search

Third-party aggregator with state-adopted code versions and local amendments layered in. Useful for jurisdiction-specific lookups.

HUD USER — Office of Policy Development & Research

HUD's research portal. Navigate to Topics → Building Codes for state adoption data and energy code resources.

NFPA 70 — National Electrical Code

The NEC governs electrical installation in most U.S. jurisdictions. NFPA makes the current edition readable online for free.

NFPA 101 — Life Safety Code

Occupancy and egress requirements adopted by many states for commercial construction.

RSMeans Data Online

The industry benchmark for unit cost data. Subscription required for full access; free trial available.

NAHB Construction Cost Data

NAHB publishes periodic cost-of-construction studies for residential builders and remodelers. Browse Housing Economics for the latest reports.

Bureau of Labor Statistics — Construction

Labor productivity, wage rates, and industry employment data by trade. Free from the federal government.

CSI MasterFormat

The standard numbering system for construction specifications. Used in bidding, estimating, and project documentation across the industry.

Associated General Contractors (AGC)

The primary national association for commercial general contractors. Contract documents, safety resources, workforce development.

American Subcontractors Association (ASA)

National advocacy and resources for specialty and trade subcontractors.

Associated Builders and Contractors (ABC)

Merit shop (open-shop) contractor association. Safety programs, workforce training, legislative advocacy.

NAHB — National Association of Home Builders

Primary association for residential builders and remodelers. Education, codes advocacy, cost data.

NECA — National Electrical Contractors Association

Electrical contractors association. Labor agreements, code resources, workforce training.

MCAA — Mechanical Contractors Association

Plumbing, HVAC, and mechanical contractors. Safety, training, contract standards.

SMACNA — Sheet Metal & Air Conditioning Contractors

HVAC and sheet metal contractor association. Industry standards, installation manuals, technical guides.