Construction

Thirty-four guides, one rulebook, and nobody names the book

This section holds a single collection. Roof Pitch is 34 guides about slope: reading a pitch, measuring one without climbing, converting it to degrees, the minimum for shingles or metal or slate, and what to choose for a shed, a solar array or heavy snow.

The hub on that collection already carries the code layer. Every minimum slope in the International Residential Code, covering by covering, with the section number beside it. What that page does not do, and what almost nothing written for homeowners does, is say where those section numbers come from.

They come from a book. The book is written by a private trade association registered with the Internal Revenue Service as a business league. It sells for $209 a copy. It became binding on your house because a legislature or a state agency wrote its title into a statute or a rule. That is the whole mechanism, and it is stranger than it sounds: the rules that govern the roof over your head are a copyrighted commercial product, and the version that binds you is frequently not the version being sold.

This page is about the book. Who writes it. How a citation turns it into law. Which edition actually applies where you live. What the courts have said about having to buy the law. What is inside it that is not written by the people who publish it. And what happens when the book has no answer for the thing you want to build.

A citation, not a copy: why the enforceable text is a book you do not own

A model code is not law. It becomes law when a government adopts it, and the mechanism of adoption is the thing to understand, because it explains almost every strange feature of this whole arrangement.

Governments overwhelmingly adopt by reference. The adopting law cites the title, edition and publisher of the code and stops there. The actual text is not reproduced in the statute or the ordinance. The Code Council explains why on its own adoption resources page: asked whether a jurisdiction may reproduce the code text in its law, the answer is no, because the codes are copyrighted and cannot be reproduced without a license.

So the alternative, writing the rules out in full in the ordinance, is foreclosed by copyright for any jurisdiction that has not bought a license. Incorporation by reference is not merely convenient. It is close to the only route available, and it is the reason the enforceable law on your house is a pointer to a book rather than the words themselves.

Some states legislate around the consequences. Maine requires that at least one copy of any code adopted by reference be filed with the municipal clerk and kept available for public use, inspection and examination, and filed there for thirty days before the ordinance is adopted. The same statute carries a detail worth noticing: the ordinance must state the penalty for violating the code separately, and no part of the penalty may be incorporated by reference. The technical rules may be a citation. The punishment must be written out.

Four instruments, four states

Statewide, or not at all

The other axis is how much room a city has to differ. Three patterns cover most of the country.

• Uniform statewide. Minnesota Statute 326B.121 makes the State Building Code the standard that applies statewide and provides that it supersedes the building code of any municipality. Subdivision 2 goes further: a municipality must not, by ordinance or through a development agreement, require code provisions regulating components or systems that differ from the State Building Code. There is essentially no local amendment.
• Statewide floor that cities may exceed. Florida Statute 553.73 lets local governments adopt amendments to the technical provisions that are more stringent than the state code, after a public hearing, on evidence of local need, and no more stringent than necessary to address it. Then the sting: such an amendment is effective only until the Commission adopts the new edition every third year. Local amendments expire on a three year clock unless re-adopted, with a narrow exception for flood related provisions.
• No statewide code at all. Colorado says so on the state architect page in as many words: the state has no statewide building code, and codes are primarily adopted and enforced at the local level. The exceptions are narrow. The State Buildings Program covers state owned property, the Division of Fire Prevention and Control covers public schools and health facilities, and the Division of Housing enforces codes for manufactured and factory built housing and adopts codes for site built hotels, motels and multifamily buildings in jurisdictions that have none. Note what is missing from that gap filling list: the single family house. In a Colorado county that has adopted nothing, a house can be built with no code and no permit.

North Carolina adds a fourth variation. General Statute 143-138 directs the Residential Code Council to perform a comprehensive review and revise the North Carolina Residential Code only every six years, and bars local governments from adopting fire prevention provisions applying to dwellings that the state residential code does not prescriptively require. Six years is double the model cycle, by statute.

What it costs to read the rules that govern your own house

All prices below were read from the Code Council store and subscription pages on 19 August 2026.

There is also a free option, and it is genuinely useful: the Digital Codes platform serves the full text of the code in read only form at no charge. Everything quoted on this page came from it. What free does not include is the part most people actually need.

Look at where copy, paste and print sits on the feature comparison. It is a paid row. So is integrated code insights, and so is search across content and graphics. The compare tool on the same page reported 3,155 titles on the day this was written. The footnote under the plan grid reads that read only access is available at no cost.

The practical shape of it: you may read the law that governs your house for nothing, on a screen, one section at a time, and you may not print it, copy it or paste it into an email to your contractor without paying at least $19.95 a month or $178 for the file.

Congress told agencies to use private standards, then never said they had to be free

The situation is not an accident and it is not a loophole. It is federal policy, built in three deliberate layers.

• 1996, the statute. The National Technology Transfer and Advancement Act of 1995, Public Law 104-113, enacted 7 March 1996, provides at section 12(d)(1) that all federal agencies and departments shall use technical standards developed or adopted by voluntary consensus standards bodies as a means to carry out policy objectives. Congress directed the federal government away from writing its own standards and toward buying them from private bodies.
• 2016, the implementation. Office of Management and Budget Circular A-119, revised 27 January 2016, tells agencies they must use voluntary consensus standards in lieu of government unique standards in procurement and regulatory activities, except where inconsistent with law or otherwise impractical. On the access problem it is notably soft. Where standards are copyrighted or otherwise subject to legal protection and not freely available, agencies should work with the developer to promote availability, through technological solutions, low cost publication or other appropriate means, while respecting the interest of the copyright owner in protecting its intellectual property. Should work with. Not shall require.
• The deeming fiction. Title 5 of the United States Code, section 552(a)(1), provides that matter reasonably available to the class of persons affected is deemed published in the Federal Register when incorporated by reference with the approval of the Director of the Federal Register. A document you have to buy from a private publisher is treated in law as though it had been printed in the Federal Register.

Reasonably available, and the refusal to define it

The operative rule is 1 CFR part 51. Section 51.7(a)(3) makes a publication eligible for incorporation only if it is reasonably available to and usable by the class of persons affected. In determining usability the Director considers completeness and ease of handling, and whether the publication is bound, numbered and organized.

The Office of the Federal Register revisited these rules in a final rule at 79 FR 66267, published 7 November 2014 and effective 6 January 2015. It added a requirement that an agency discuss, in the preamble of the proposed rule, the ways that the materials it proposes to incorporate by reference are reasonably available, and summarize the material. And it did two things that decide the whole question.

It declined to define reasonably available, on the reasoning that any definition would fail because it is either too broad to be meaningful or too restrictive. And it rejected a mandatory free online availability requirement, finding that such a requirement would go beyond its statutory authority.

That is the answer to why you can be required to comply with a document you have to pay to read. The only federal rule governing the question requires the material to be reasonably available, and the agency writing that rule expressly refused to say that reasonably available means free.

The bill that would settle it, and what it would actually settle

The Protecting and Enhancing Public Access to Codes Act, commonly called the Pro Codes Act, has been introduced repeatedly. In the 118th Congress it was reported by the House Judiciary Committee and then failed on the House floor under suspension of the rules, falling short of the two thirds needed. In the 119th Congress, H.R. 4072 was introduced on 23 June 2025 by Representatives Darrell Issa and Deborah Ross.

The operative text would add a new section 123 to chapter 1 of title 17. A standard retains copyright protection notwithstanding incorporation by reference, provided the standards development organization makes all incorporated portions publicly accessible online at no monetary cost, in a format including a searchable table of contents and index. Read that carefully. It secures copyright in exchange for free read only access, and by the Congressional Research Service reading of the bill it would still permit the organization to restrict printing and downloading and to require user accounts or acceptance of terms.

Whatever else it is, it is not a bill making codes free to use. It is a bill making the current read only arrangement into a statutory bargain. The House Judiciary Subcommittee on Courts, Intellectual Property, Artificial Intelligence and the Internet held a hearing on the question, titled Protecting U.S. Leadership in Codes Development and Enhancing Public Access, on 21 April 2026.

Building something the code never contemplated

Prescriptive codes describe known assemblies. Build something outside that description and there is no section to point at. The IRC handles this in one paragraph, and the paragraph gives one person the decision.

Section R104.11 of the 2021 IRC provides that the code is not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by it. The building official has the authority to approve an alternative material, design or method upon application of the owner or the authorized agent of the owner. The official must first find that the proposed design is satisfactory and complies with the intent of the code, and that the material, method or work offered is, for the purpose intended, not less than the equivalent of that prescribed in the code in quality, strength, effectiveness, fire resistance, durability and safety. Compliance with the specific performance based provisions of the International Codes is an alternative route.

R104.11.1 backs that with teeth. Where there is insufficient evidence of compliance, or evidence that a material or method does not conform, or in order to substantiate a claim for an alternative, the building official has the authority to require tests as evidence of compliance, to be made at no expense to the jurisdiction. The applicant pays.

Evaluation reports, and what they are not

An industry grew up to supply that evidence. ICC Evaluation Service, a subsidiary of the Code Council, issues Evaluation Reports. An Evaluation Report presents the findings, conclusions and recommendations from a technical evaluation of a building product. The criteria a product is evaluated against, called acceptance criteria, are developed by the evaluation service technical staff in consultation with the applicant and with input from interested parties, and approved by an evaluation committee composed exclusively of code officials, through open public hearings or in selected instances an alternate process involving solicited public comment.

The reports directory is free and searchable, by report number, product name, manufacturer, product type, code edition and referenced standard. An overview document published by the service describes about 1,500 active evaluation reports, though the document carries no date and the figure should be treated as possibly stale.

Three states that run their own product approval

• Florida. Statute 553.842 directs the Building Commission to develop a product evaluation and approval system, and names the entities whose evaluations count: the National Evaluation Service, ICC Evaluation Service, Underwriters Laboratories, Intertek and the Miami-Dade Building Code Compliance Office. Testing laboratories must be accredited by A2LA or NVLAP. Statewide approval precludes local jurisdictions from requiring further testing or evidence as a condition of use, though a building official may still deny a specific local application in writing where the proposed use is inconsistent with the approval. The rules sit at chapter 61G20-3 of the Florida Administrative Code.
• Miami-Dade County. The Product Control Section of the Board and Code Administration Division issues a Notice of Acceptance for products protecting the building envelope: windows, exterior glazing, wall cladding, roofing, exterior doors, skylights, glass block, siding and shutters. Each notice states that the product is approved as described and designed to comply with the Florida Building Code including the High Velocity Hurricane Zone, and each carries an expiration date. Roofing products are evaluated against the Testing Application Standards, including TAS 100 for wind and wind driven rain resistance of discontinuous roof systems and TAS 125 for metal roofing systems.
• Texas. The Department of Insurance runs windstorm product evaluation, and does two things worth noting. It charges no fee for evaluating a product. And it maintains a third party evaluation report listing program that accepts evaluations from the Code Council, the Florida Product Approval System and Miami-Dade County. A product not on the index may still be acceptable if an inspector can verify compliance.

Listed, labeled, approved

Three words carry most of the weight in a code inspection. Labeled means the item bears the mark of a nationally recognized testing laboratory, approved agency or other organization concerned with product evaluation that maintains periodic inspection of production and whose labeling indicates the item meets identified standards or has been tested and found suitable for a specified purpose. Listed means the item appears in a list published by an organization acceptable to the official and concerned with evaluation, which likewise maintains periodic inspection or evaluation. Approved, in the model text, means acceptable to the building official.

Nationally recognized testing laboratory is a term with a federal definition. Under 29 CFR 1910.7, it means an organization recognized by the Occupational Safety and Health Administration that tests for safety and lists or labels or accepts equipment or materials. Recognition requires capability, control procedures including factory production inspections and field inspections to verify proper use of the mark, complete independence from the employers subject to the requirements and from the manufacturers and vendors of the tested equipment, and procedures for handling complaints and disputes. The published list ran to 21 organizations on 19 August 2026, and several of them, including UL, Intertek, FM Approvals, CSA, IAPMO, NSF and QAI, sit on both sides of the fence as building product evaluators and federally recognized laboratories.

Thirty-four guides, grouped by what you are actually doing

The Roof Pitch hub holds the full list and the code minimum layer. The roof pitch calculator does the arithmetic. These are the entry points.

The other eleven sections of the site are on the blog hub.

The documents behind everything above

Every figure on this page is tied to the body that publishes it, with the date it was read. All links verified 19 August 2026.

• The code text itself. All IRC quotations are from the 2021 International Residential Code, Chapter 1, Chapter 9 and Chapter 44, read in read only form on the Digital Codes platform. That platform is a client side application, so the text is not retrievable by an ordinary automated fetch; every quotation here was read from the rendered page. The platform labels the 2021 edition a historical version.
• Who the Code Council is. Establishment of the Code Council, Building Safety Journal, 3 December 2024, source of the 9 December 1994 merger date and the three predecessor bodies, and First International Building Code Released, 6 November 2024 for the 2000 publication date. Tax status and revenue from the ProPublica Nonprofit Explorer record for International Code Council Inc, employer identification number 36-3999004, which mirrors Internal Revenue Service filing data and shows subsection 501(c)(6) and revenue of $109,907,356 for the year ending December 2024. This is a mirror rather than the Service itself; the underlying return could not be opened directly.
• The fifteen codes and the development process. The International Codes for the family list and the three year cycle, the current code development cycle page for the Group A and Group B composition and the 2027 target, and ICC Code Development Process, December 2020 for the four stages and the governmental voting representatives. The energy chapter carve out is from the Code Council announcement of 19 July 2021.
• Prices. The 2024 IRC store listing for the print and digital prices with item numbers, and the Digital Codes pricing page for the four subscription tiers, the feature grid placing copy, paste and print on the paid side, and the footnote that read only access is available at no cost. Both read on 19 August 2026 and both liable to change.
• Free access, in the two versions the Code Council publishes. Where can I view the codes for free, support portal, updated 8 November 2024, and the code adoption resources page, which also supplies the definition of incorporation by reference and the answer that the codes cannot be reproduced without a license.
• Adoption mechanics. Congressional Research Service report R47665, Building Codes, Standards, and Regulations: Frequently Asked Questions, updated 23 April 2025. State instruments: Texas Local Government Code chapter 214; Florida Statute 553.73 and 553.79; Virginia 13VAC5-63-10 with the effective date from the Virginia Department of Housing and Community Development; the California Building Standards Law as published by the Building Standards Commission for sections 18928, 18928.1, 18929.1 and 18938; Minnesota Statute 326B.121 and Minnesota Rule 1309.0010 and Rule 1309.0100, which states that IRC chapter 1 is deleted and replaced; North Carolina General Statute 143-138; the Colorado Office of the State Architect; and Maine Revised Statutes title 30-A section 3003 for the filing and separate penalty requirements.
• The court decisions. Veeck v. Southern Building Code Congress International, 293 F.3d 791, Fifth Circuit en banc, 7 June 2002, with the recommendation of denial in the invited brief of the Solicitor General, May 2003. Georgia v. Public.Resource.Org, No. 18-1150, decided 27 April 2020, with the Code Council amicus brief supporting the petitioner. ASTM v. Public.Resource.Org, 896 F.3d 437, D.C. Circuit, 17 July 2018 for the reservation of the constitutional question, and 82 F.4th 1262, 12 September 2023 for the fair use holding. Canadian Standards Association v. P.S. Knight, 112 F.4th 298, Fifth Circuit, 16 July 2024, with the certiorari denial of 21 January 2025 on Supreme Court docket 24-537.
• The federal machinery. Public Law 104-113, the National Technology Transfer and Advancement Act of 1995, enacted 7 March 1996. OMB Circular A-119, revised 27 January 2016. 1 CFR 51.7 and the incorporation by reference final rule at 79 FR 66267, 7 November 2014, source of the refusal to define reasonably available and the rejection of a free availability mandate. 5 U.S.C. 552 for the deeming provision.
• The pending legislation. H.R. 4072 as introduced, the sponsor announcement of 23 June 2025, Congressional Research Service report R47656, updated 8 August 2025 for the analysis of what the bill would permit, and the House Judiciary subcommittee hearing of 21 April 2026. The Congressional Research Service copies are read from a mirror because the congressional research site refuses automated access.
• Standards and their prices. ASTM D3462/D3462M-25, E108-25, D7158/D7158M-24a and D1970/D1970M-21; UL 790 edition 9, published 18 February 2022; ASCE/SEI 7-22, whose own page carries no price; and the American Wood Council page for the 2018 National Design Specification with its free view only option.
• Product approval. The ICC Evaluation Service report program and acceptance criteria page, the free reports directory, and an undated service overview which is the source of both the approximate report count and the statement that only the code official can approve a product. Florida Statute 553.842 and Florida Administrative Code chapter 61G20-3. The Miami-Dade product control program and a sample Notice of Acceptance for a metal roofing system citing TAS 100 and TAS 125. The Texas Department of Insurance product evaluation questions.
• Listing and labeling. 29 CFR 1910.7 for the definition and the four recognition criteria, and the current list of recognized laboratories, which does not print a total; 21 is a count of the names on it on 19 August 2026. State redefinitions from Ohio Administrative Code 4101:8-2-01 and Minnesota Rules chapter 1309.
• Noted and not published. Several things were checked and deliberately left out. No scope sentence is given for eleven of the fifteen codes, because the Code Council does not publish one on its family page and writing them would be invention. No total is claimed for Chapter 44 or for the recognized laboratories, because neither body publishes one; the figures given are counts made here on a stated date by a stated method. No Digital Codes subscription figure other than the four listed tiers is given, and no claim is made about what the free tier contained at any earlier date. The Code Council is not quoted as denying that it has enforcement power, because no such sentence could be found on its site; the point is made from what it does say about adoption instead. No claim is made about which states other than Colorado lack a statewide residential code, because the only document listing others carries no date. Nothing is said about the current Massachusetts edition, and no dollar figure is given for penalties, because R113.4 leaves them to the adopting jurisdiction. The Congressional Research Service reading of what the Pro Codes Act would permit is attributed to that report rather than stated as the effect of the bill, because the bill has not been enacted and no court has construed it.