Yes, in most places you can run the report yourself. Whether your building department wants anything more than the report is a local question, not a national one - here's how to find out for your county instead of guessing.
Short answer: yes - a REScheck report can be prepared and submitted by a homeowner in most jurisdictions, but whether the building department accepts it without a licensed preparer's stamp depends on state and county. The software puts no restriction on who runs it. The restriction, where one exists, comes from your local building code and your local plan reviewer, not from REScheck itself.
REScheck-Web is a free, browser-based tool published by the U.S. Department of Energy's Building Energy Codes Program. DOE describes it as a way for "builders, designers, and contractors to determine whether new homes, additions, and alterations meet the requirements of the IECC or a number of state and local energy codes." It runs a straightforward U-factor times area (UA) calculation for the building envelope - insulation, windows, doors, foundation - and compares your building's total heat loss against what a code-compliant building of the same size would lose. If your numbers beat or match the reference building, the report shows compliant.
Nothing about the tool checks a license or asks who you are. It is not gated behind a professional account, and DOE's own description names "builders, designers, and contractors" as the intended users - a homeowner acting as their own general contractor fits that description as well as anyone else on a jobsite.
This is the actual question people mean when they ask "can a homeowner do this," and the honest answer is that the model code does not decide it - your jurisdiction does. The 2021 IECC's construction documents section, 2021 IECC R103.1, reads: "The construction documents and technical reports shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the code official is authorized to require necessary construction documents to be prepared by a registered design professional."
Read that carefully. The IECC does not itself require a stamp on a REScheck or any other compliance document. It requires one only where a state or local statute already requires one - and most states exempt a private single-family or two-family residence from the professional-engineer and registered-architect licensing acts that would otherwise apply to commercial buildings. Where a stamp requirement genuinely exists for residential work, it's usually attached to the structural drawings or the whole plan set under a state's architecture or engineering practice act, not specifically to an energy code compliance report.
That said, "usually exempt" is not "always exempt," and enforcement is local even where the state statute is not. Some jurisdictions have their own submittal checklists that ask for a specific preparer credential regardless of what state law technically requires. Because this genuinely varies by state and even by county, we're not going to invent a fifty-state list here - see the site's state finder for what's documented for your state, and when in doubt, call your local building department and ask what they want on the REScheck line of the permit checklist before you submit anything.
This is a real thread, and it's worth reading for the situation, not for a legal answer. A Texas homeowner had fired their builder after 16 months of delays, was in active legal action with that builder, and had a city inspector flag that a REScheck report needed to be posted at the breaker box before the project could close out. The homeowner's construction company was supposed to have supplied it and hadn't, and going back through the builder to get it wasn't realistic given the litigation.
What that thread is: one homeowner's account of a specific, sympathetic bind - the report is small and self-contained, but you still need it, and the person who was supposed to produce it is gone. What that thread is not: a ruling from a building department, a statement of Texas law, or evidence about any other state. Reddit answers in a thread like that are real-world color from people who've been through something similar, useful for understanding that the question is common, not for citing as authority on what your city requires. If you're in a similar spot, the reliable next step is the same either way: call the inspector's office and ask exactly what they need on the certificate and who's allowed to sign it.
Texas is worth walking through because it comes up constantly in these searches and because the facts are more specific than "it depends." Texas has no statewide residential building code at all - cities and counties individually adopt and administer building codes, so what your local jurisdiction wants can vary by city. What Texas does have is a statewide energy standard: the Texas Health and Safety Code, Chapter 388 (Texas Building Energy Performance Standards) establishes the state's energy conservation framework and defines who a "code official" and "code-certified inspector" are for enforcement purposes, but administration and enforcement of that standard happens at the local level, city by city and county by county.
On the licensing question specifically: Texas's Architects Registration Act (Texas Occupations Code, Chapter 1051) exempts private single-family and two-family dwellings from the requirement that a registered architect prepare the plans, a point confirmed in the Texas Board of Architectural Examiners' own guidance on when registration is and isn't required. There is no separate statewide license or registration specific to preparing a REScheck report. So for a typical single-family home in Texas, there is no state-level stamp requirement standing between a homeowner and their own REScheck - which lines up with what that r/Homebuilding thread implies without quite saying it outright. What's left is entirely local: individual Texas cities can still ask for specific documentation formats or preparer information on their permit checklists, so "no state requirement" is not the same as "call ahead and confirm your city doesn't want something different."
In most jurisdictions, yes. A REScheck report is a document that gets attached to a permit application - it is not tied to who holds the permit, and most building departments don't check whether the same name is on both. What the plan reviewer actually checks is whether the numbers on the report match the plans: the window schedule, the insulation R-values, the foundation type, the mechanical equipment. If your contractor is pulling the permit and you've prepared the REScheck yourself, that's a normal split of labor as long as the inputs are accurate and traceable to the plan set. The one place this gets tangled is the certificate: 2021 IECC R401.3 requires a permanent certificate to be completed and posted (commonly on or near the electrical distribution panel) listing the compliance path used, the insulation and fenestration values, and the mechanical equipment installed. The base code text describes this as being completed by "the builder or other approved party" - again, a role description, not a license requirement - but the certificate has to match what actually got built, which is easy to get wrong if the person filling it out wasn't the one coordinating the trades.
REScheck-Web will accept whatever numbers you type into it and calculate compliance based on those numbers - it has no way to know if your window U-factor is a real, labeled value or a guess, and it has no way to flag that you used a center-of-glass number where the code wants the whole-window rating. That's not a flaw in the software; it's just what a calculator does. The places DIY reports commonly go wrong are predictable: window and door U-factors and SHGC pulled from a spec sheet instead of the actual NFRC label, R-values that don't match what's on the wall section drawing, a duct location entered as "conditioned" when it's actually routed through the attic, or a foundation type selected from a dropdown that doesn't match the plans.
If you have confident, plan-sourced numbers for every envelope assembly and your first pass shows compliant with room to spare, doing it yourself is a reasonable way to spend thirty minutes. If you're not sure which numbers are right, or your first attempt failed the UA comparison and you don't know which assembly to upgrade to fix it, that's the point where a reviewed report earns its cost - not because the software works differently, but because someone traces every input back to the sheet it came from before the reviewer sees it.
For a REScheck, send the plan set: the window and door schedule, wall and ceiling insulation callouts, foundation type and insulation, and the mechanical equipment specified. Every input on the report is annotated with the plan sheet it came from, so your reviewer can verify it without a phone call. If you also need HVAC equipment sized, the Manual J + REScheck package covers both from the same plan set.
Not by itself. 2021 IECC R103.1 requires a registered design professional only "where required by the statutes of the jurisdiction" - the model code defers to state law rather than setting its own stamp rule.
Yes. It's a free DOE tool built for builders, designers, and contractors, with no license gate on who can run it.
A homeowner needed a REScheck certificate posted after firing their builder mid-project. It's a real, common situation, not a ruling on the law - call your inspector's office for the actual answer in your city.
No statewide requirement - Texas exempts private single-family and two-family dwellings from the architect registration act, and has no statewide building code at all. Confirm with your specific city.
In most jurisdictions yes. The reviewer checks whether the report's numbers match the plans, not whose name is on it.
When you're not confident in every input, or a DIY attempt already came back over the UA limit and you don't know which assembly to change.
Rules on who may prepare or stamp an energy code compliance document vary by state and are sometimes set at the county or city level rather than statewide. This page describes what the model code itself requires and verifies the Texas specifics named above; for any other state, check the state finder or call your local building department before assuming a requirement does or doesn't apply. Final authority rests with your building official.
Travis Smith, ICC-Certified Residential Energy Inspector / Plans Examiner. The same certification your building department's plan reviewer holds - working for you.