Know the adopted edition, not the newest
Model codes are published on regular cycles: the International Codes (IBC, IRC, IECC, IMC, IPC, IFC) every three years with 2024 the latest, NFPA 70 (National Electrical Code) every three years with 2026 the latest, and NFPA 72 (fire alarm) with 2025 current. What you must build is the edition the jurisdiction adopted, with its amendments, usually fixed by the permit application date. The project's code analysis sheet normally lists them; if it does not, ask the building department.
| Code | Latest model edition (Nov 2026) | Where to check adoption |
|---|---|---|
| IBC, IRC, IFC, IMC, IPC | 2024 | State and city building department; ICC |
| IECC and ASHRAE 90.1 | 2024 IECC; 90.1-2022 | DOE Building Energy Codes Program state portal |
| NFPA 70 (NEC) | 2026 | NFPA NEC enforcement maps; state electrical board |
| NFPA 72 | 2025 | State fire marshal; local fire department |
| ADA Standards | 2010 Standards for Accessible Design | DOJ (28 CFR Part 36); state accessibility codes may add requirements |
Federal law also pushes energy codes forward: DOE reviews each new IECC and 90.1 edition, and after an affirmative determination states must certify they have reviewed (residential) or updated (commercial) their codes. DOE's determination for 90.1-2022 set a state certification deadline of March 6, 2026; for the 2024 IECC, December 30, 2026. Many states are still on older editions, which is why the adopted list matters.
Energy codes: where scope grows
- Insulation levels in walls, roofs and slab edges; continuous insulation.
- Air barriers with detailing and, in some jurisdictions, whole-building air leakage testing.
- Fenestration U-factor and SHGC for windows and storefront.
- Lighting power, occupancy and daylight controls, and receptacle controls.
- HVAC efficiency, economizers, energy recovery and controls.
- Commissioning and functional testing.
- Alterations: roof replacements with insulation above deck must meet current insulation levels under the 2021 IECC (see the roof replacement scope guide).
Electrical: 2026 NEC items with cost impact
Where the 2026 NEC has been adopted, examples that change estimates include:
- GFCI protection for outdoor outlets up to 60 A (210.8(F)), with a new Class C special-purpose GFCI option for listed HVAC equipment.
- Listed cable ties and support hardware for cable and raceway support (300.13(E) and the cable articles).
- Paired locknuts on IMC and RMC terminations.
- A 12 in. access space above cable tray (392.18(F)), with exceptions.
- Reorganized load calculations (Article 120) with a lower dwelling general lighting load, which can affect service size.
Earlier cycles keep expanding GFCI and AFCI coverage, surge protection and receptacle placement. Read the adopted edition, not memory.
Fire and life safety
NFPA 72-2025 adds requirements such as enforceable cybersecurity provisions for fire alarm systems and more detailed voltage-drop calculation requirements for DC-powered notification appliances (18.3.7); local amendments drive device counts and notification. Building and fire codes drive sprinklers, rated assemblies, smoke and fire dampers, firestopping, emergency lighting and egress hardware.
Items that are often undrawn
- Firestopping at rated penetrations and head-of-wall joints.
- Fire-rated assemblies requiring specific board, framing and sealing.
- Emergency lighting and exit signs from the egress analysis.
- Accessibility items: grab bars, clearances, hardware heights and signage.
- Insulation and air-barrier continuity at transitions.
- Seismic bracing for piping, ductwork, ceilings and equipment in applicable seismic design categories.
- Special inspections and testing coordination, which can add schedule and access costs even when the owner pays the inspector.
A rooftop unit replacement on a building under a newly adopted NEC that requires GFCI protection for the outdoor HVAC outlet. The drawings show a standard breaker. Pricing the drawn design misses a GFCI or SPGFCI breaker and possible coordination with the equipment manufacturer. The fix is a one-line RFI and an assumption in the proposal: "Breakers priced as shown; GFCI or SPGFCI protection required by the adopted code is excluded pending RFI 4", or include it and say so.
A code review checklist for every bid
- Adopted codes and editions, with local amendments.
- Construction type and fire ratings from the code sheets.
- Seismic design category, if stated.
- Energy code compliance path (prescriptive or performance).
- Your trade's code-driven items: drywall (rated walls, head-of-wall), electrical (emergency systems, GFCI and AFCI), mechanical (dampers, seismic restraint, economizers), plumbing (backflow, accessibility).
- Spec sections that implement code items.
- RFIs for anything required but not drawn.
Update your assemblies when the jurisdiction adopts a new edition, so code-driven items are included every time.
Where RenderDraw fits
RenderDraw's AI takeoff proposes quantities from drawings with sources and flags unclear items for review; the estimator remains responsible for applying adopted codes. Try a free sample takeoff.
