{"meta":{"name":"Building Compliance Knowledge Base","publisher":"Kestrel Labs","url":"https://kestrellabs.com/resources/knowledge-base/","description":"An entity graph of building compliance: fundamentals, digital compliance concepts, technology, and permitting, with explicit relationships between concepts.","license":"Definitions may be quoted with attribution to Kestrel Labs."},"sections":[{"id":"fundamentals","num":"01","title":"Fundamentals","blurb":"The regulatory ground rules every project sits on. Reference-grade, with the context that dictionary definitions leave out."},{"id":"digital-compliance","num":"02","title":"Digital Compliance","blurb":"The concepts behind the shift this knowledge base exists to explain: regulation becoming computable, and compliance becoming a continuous property of design rather than a milestone event."},{"id":"technology","num":"03","title":"Technology","blurb":"The platforms and formats digital compliance runs on."},{"id":"permitting","num":"04","title":"Permitting","blurb":"What happens after submission, and why so much of it is determined before submission."}],"entities":[{"id":"building-code","name":"Building code","synonyms":["construction code","adopted code"],"category":"fundamentals","definition":"The body of legal requirements governing how buildings must be designed and constructed, covering life safety, egress, fire protection, accessibility, structure, and energy. In the United States, most jurisdictions adopt model codes such as the IBC and then modify them with local amendments.","whyItMatters":"In practice there is no single \"the code.\" Every project answers to a specific stack: a model code, an edition year, and the local changes layered on top. Establishing that stack is the first step of any code analysis, manual or automated.","enables":["machine-readable-codes"],"related":["ibc","local-amendments","jurisdiction"],"confusedWith":[{"term":"Zoning code","distinction":"Zoning governs what may be built where (use, density, setbacks); the building code governs how the building itself must perform. A project must satisfy both, usually through different review processes."}],"question":{"q":"Is the building code the same everywhere?","a":"No. Model codes like the IBC provide the common base, but each jurisdiction adopts its own edition on its own schedule and amends it locally. Compliance is always relative to one specific jurisdiction’s stack."},"audiences":["Architects","Owners & developers"],"sources":[{"label":"ICC — International Codes","href":"https://www.iccsafe.org/products-and-services/i-codes/"}]},{"id":"ibc","name":"IBC (International Building Code)","synonyms":["International Building Code"],"category":"fundamentals","parent":"building-code","definition":"The model building code published by the International Code Council and adopted, with amendments, by most United States jurisdictions. The IBC governs commercial and most multi-family construction; the companion IRC covers one- and two-family dwellings.","whyItMatters":"The IBC is revised on a three-year cycle and jurisdictions adopt editions at their own pace, so two active projects in neighboring cities can be governed by different editions of the same code. \"Meets the IBC\" is only meaningful with an edition and a jurisdiction attached.","related":["icc","local-amendments","jurisdiction"],"question":{"q":"Which IBC edition applies to my project?","a":"The edition your jurisdiction has adopted, as amended, not the newest one published. Confirm the adopted edition and amendments with the AHJ before starting code analysis."},"audiences":["Architects"],"sources":[{"label":"ICC — IBC","href":"https://codes.iccsafe.org/codes/ibc"}]},{"id":"icc","name":"ICC (International Code Council)","synonyms":["International Code Council"],"category":"fundamentals","definition":"The nonprofit organization that develops and publishes the International Codes (I-Codes), including the IBC, through a governmental consensus process. Most US building regulation starts as ICC text before jurisdictions adopt and amend it.","whyItMatters":"The ICC also publishes its codes as structured digital data, which is what makes official code content available to software rather than only to readers. Kestrel builds on official ICC code data through a direct collaboration.","enables":["machine-readable-codes"],"related":["ibc","api"],"audiences":["Architects","Technology companies"],"sources":[{"label":"iccsafe.org","href":"https://www.iccsafe.org/"}]},{"id":"ahj","name":"AHJ (Authority Having Jurisdiction)","synonyms":["building department","building official"],"category":"fundamentals","definition":"The organization or official with legal authority to enforce building regulations on a project: usually a municipal or county building department, and often several authorities at once, such as a fire marshal, a health department, or a state agency.","whyItMatters":"The AHJ determines which code editions and amendments apply, reviews submissions at plan check, issues corrections, inspects construction, and grants the approvals a project needs to proceed. For architects, the AHJ is the reader the drawing set must ultimately satisfy, which is why understanding how your AHJ reviews is as important as understanding what the code says.","related":["plan-check","jurisdiction","digital-permitting"],"confusedWith":[{"term":"Code-writing body","distinction":"The AHJ mostly does not write the code. Bodies like the ICC write model codes; the AHJ adopts, amends, and enforces them."}],"question":{"q":"Does the AHJ write the building code?","a":"Mostly no. The AHJ adopts a model code written by a body like the ICC, amends it for local conditions, and enforces the result through plan check and inspection."},"audiences":["Architects","Jurisdictions","Owners & developers"]},{"id":"jurisdiction","name":"Jurisdiction","category":"fundamentals","definition":"The geographic area subject to a specific authority’s building regulations. Two projects on opposite sides of a city line can face different code editions and different amendments, which is why a compliance check is only meaningful relative to the specific jurisdiction the project sits in.","whyItMatters":"The jurisdiction is also the unit of digitization. Every authority that structures its adopted codes and moves review to digital processes shortens the feedback loop for every firm that builds there, which is why digital permitting tends to spread jurisdiction by jurisdiction rather than all at once.","enables":["machine-readable-codes","digital-permitting"],"related":["ahj","local-amendments"],"audiences":["Architects","Jurisdictions","Technology companies"]},{"id":"local-amendments","name":"Local amendments","synonyms":["local modifications","jurisdictional amendments"],"category":"fundamentals","parent":"building-code","definition":"The changes a state, county, or city makes to a model code when adopting it: stricter requirements, deletions, or additions. Amendments are why meeting the IBC does not automatically mean meeting code in a given city.","whyItMatters":"For jurisdictions, amendments are how local conditions get encoded: seismic risk, wildfire exposure, density, climate. For compliance software, they are the hard part. Checking against an unamended model code produces confident answers that are wrong in exactly the places local authorities care about most.","dependsOn":["jurisdiction"],"related":["ibc","ahj","machine-readable-codes"],"question":{"q":"If a design meets the IBC, does it meet code?","a":"Not necessarily. The governing code is the adopted edition plus local amendments, which can be stricter or simply different. A check that ignores amendments is checking the wrong code."},"audiences":["Architects","Jurisdictions","Technology companies"]},{"id":"occupancy-classification","name":"Occupancy classification","synonyms":["use group","occupancy group"],"category":"fundamentals","definition":"The categorization of a building or space by how it is used: assembly, business, residential, institutional, and so on. Classification drives much of what follows in a code analysis, including allowable height and area, egress capacity, required fire separations, and sprinkler thresholds.","whyItMatters":"Misclassifying occupancy early is one of the most expensive code mistakes available, because so many downstream requirements key off it. It is also a genuinely interpretive judgment in mixed-use and unusual programs, which is why classification stays with the architect even when checking is automated.","enables":["egress","fire-resistance-rating"],"related":["building-code"],"question":{"q":"Who decides a building’s occupancy classification?","a":"The architect proposes it in the code analysis and the AHJ confirms it at plan check. Software can test the consequences of a classification, but the interpretive judgment belongs to the licensed professional."},"audiences":["Architects"]},{"id":"egress","name":"Egress (means of egress)","synonyms":["means of egress","exiting"],"category":"fundamentals","parent":"building-code","definition":"The continuous, protected path occupants travel to exit a building safely: exit access, the exit itself, and exit discharge. Requirements for travel distance, corridor width, door swing, and the number of exits are among the most frequently checked and most frequently violated parts of the building code.","whyItMatters":"Egress is unforgiving because it is spatial: a late change to a corridor or stair does not stay local, it propagates through room layouts, door schedules, and rated assemblies. That makes egress the clearest example of why compliance issues are cheapest the moment they are created.","dependsOn":["occupancy-classification"],"related":["continuous-compliance","rework"],"audiences":["Architects"]},{"id":"fire-resistance-rating","name":"Fire-resistance rating","synonyms":["fire rating","hourly rating"],"category":"fundamentals","parent":"building-code","definition":"The length of time, expressed in hours, that a building assembly is required to withstand fire exposure, established through standardized testing. Ratings apply to walls, floors, doors, and structural elements, driven by occupancy, construction type, and required separations.","whyItMatters":"Ratings are a good example of data the BIM model can carry natively: a wall type knows its rating, a door knows the rating of the wall it sits in. When that data is structured, checking separation requirements stops being a sheet-by-sheet reading exercise.","dependsOn":["occupancy-classification"],"related":["bim"],"audiences":["Architects"]},{"id":"continuous-compliance","name":"Continuous compliance","synonyms":["always-current compliance","design-phase compliance"],"category":"digital-compliance","definition":"The practice of evaluating building code compliance continuously throughout design rather than at discrete milestones. Continuous compliance shifts issue discovery earlier, when changes are less expensive and coordination impacts are smaller.","whyItMatters":"The alternative treats compliance as an event: a code review before a deadline, a plan check after submission, each one a snapshot that starts going stale immediately. Continuous compliance treats it like cost or structural performance, a property of the design that is always current. The design questions do not change; what changes is when you find out.","dependsOn":["native-bim-compliance","machine-readable-codes"],"related":["plan-check","rework","egress"],"confusedWith":[{"term":"Permit review","distinction":"Permit review is a milestone event conducted by the AHJ after submission. Continuous compliance happens during design, on the design team’s side, and does not replace the AHJ’s review."},{"term":"Model checking","distinction":"Model checking (clash detection, BIM QA rules) validates model quality and coordination. Continuous compliance evaluates the design against regulation. A clean model can still be a non-compliant building."}],"question":{"q":"Does continuous compliance replace permit review?","a":"No. The AHJ still reviews and approves the project. What changes is what arrives at plan check: a design that has already been evaluated against the governing code, which means fewer corrections and shorter correction cycles."},"audiences":["Architects","Owners & developers"],"sources":[{"label":"Catch issues during design","href":"/resources/catch-building-code-compliance-issues-during-design/"}]},{"id":"machine-readable-codes","name":"Machine-readable building codes","synonyms":["structured building codes","codes as data"],"category":"digital-compliance","parent":"computable-regulations","definition":"Building regulations represented as structured data that software can evaluate deterministically, instead of requiring human interpretation of natural language for every check.","whyItMatters":"A requirement like a minimum corridor width becomes a rule with a scope, a condition, and a value. That structure is what allows a model element to be tested against it, and what allows the result to carry a citation back to the exact source text. Not all of the code structures cleanly; the parts that require judgment are exactly the parts that should stay with a licensed professional.","dependsOn":["building-code","jurisdiction","local-amendments"],"enables":["continuous-compliance","automated-code-checking","compliance-intelligence"],"related":["code-citation","icc"],"confusedWith":[{"term":"Digitized codes","distinction":"A PDF of the code online is digital but not machine-readable. Machine-readable means structured: scoped rules software can evaluate, not pages software can only display."}],"question":{"q":"Can the whole building code be made machine-readable?","a":"No, and that is fine. Prescriptive requirements structure cleanly; genuinely interpretive provisions do not, and pretending otherwise produces false confidence. Honest systems structure what structures and flag what requires judgment."},"audiences":["Technology companies","Jurisdictions","Architects"]},{"id":"computable-regulations","name":"Computable building regulations","synonyms":["computable codes","rules as code"],"category":"digital-compliance","definition":"Building regulations represented as structured, machine-readable intelligence rather than unstructured legal prose, enabling software to reason about compliance directly within digital design workflows.","whyItMatters":"This is the broader idea behind machine-readable codes: not just one code book as data, but zoning, energy, accessibility standards, and local amendments becoming queryable the way financial and tax rules already are in their industries. Regulation you can query like data instead of re-reading like a contract changes who can act on it, and when.","enables":["structured-compliance-data-layer","digital-permitting"],"related":["machine-readable-codes"],"audiences":["Jurisdictions","Technology companies"],"sources":[{"label":"The compliance data layer essay","href":"/resources/compliance-data-layer-built-environment/"}]},{"id":"compliance-intelligence","name":"Compliance intelligence","category":"digital-compliance","definition":"Structured regulatory knowledge that combines building codes, jurisdictional amendments, interpretations, and design context into a form software can evaluate consistently.","whyItMatters":"The distinction from raw code data matters: the code text alone does not know that your project is a mixed-use podium building in a city with a stricter egress amendment. Compliance intelligence is regulation plus applicability, the difference between a library and an answer.","dependsOn":["machine-readable-codes","local-amendments"],"enables":["structured-compliance-data-layer"],"related":["ai-building-code-compliance"],"confusedWith":[{"term":"Code data","distinction":"Code data is the text in structured form. Compliance intelligence adds applicability: which rules govern this project, in this jurisdiction, under these conditions."}],"audiences":["Technology companies","Architects"]},{"id":"structured-compliance-data-layer","name":"Structured compliance data layer","synonyms":["compliance data layer"],"category":"digital-compliance","definition":"A shared foundation of machine-readable regulatory intelligence built from codified regulations, verified interpretations, and project experience. Every jurisdiction modeled and every validated rule expands the usefulness of the system as a whole.","whyItMatters":"Most industries that run on rules eventually turn those rules into data; the built environment has not yet. Once the layer exists, design-phase checking is only the first thing it makes easier: digital permitting, portfolio review, and as-operated compliance all draw on the same foundation.","dependsOn":["compliance-intelligence","computable-regulations"],"enables":["digital-permitting","continuous-compliance"],"related":["digital-twin"],"question":{"q":"Who benefits from a structured compliance data layer?","a":"Design teams get checkable requirements during design. Jurisdictions get consistent, auditable review. Owners get portfolios whose compliance state is knowable. Technology companies get a foundation to build on instead of re-deriving code logic project by project."},"audiences":["Technology companies","Jurisdictions","Owners & developers"],"sources":[{"label":"The compliance data layer essay","href":"/resources/compliance-data-layer-built-environment/"}]},{"id":"native-bim-compliance","name":"Native BIM compliance","synonyms":["model-native compliance","BIM-native compliance"],"category":"digital-compliance","parent":"model-based-compliance","definition":"Evaluating compliance directly against the live BIM model instead of exported drawings or manually interpreted documentation. The model-native framing makes the point sharper: the model is the source of truth, so a check that runs anywhere else is checking an artifact of the design rather than the design itself.","whyItMatters":"The practical difference shows up in feedback speed and traceability. A check against the live model can run whenever the model changes and tie every issue to the specific element that caused it. A check against an export can only run after the export exists, against geometry that may already be out of date.","dependsOn":["bim"],"enables":["continuous-compliance"],"related":["automated-code-checking"],"confusedWith":[{"term":"BIM QA / clash detection","distinction":"Clash detection finds geometric conflicts between systems; BIM QA validates modeling standards. Neither evaluates the design against building regulation."}],"audiences":["Architects","Technology companies"],"sources":[{"label":"AI compliance tools, compared","href":"/resources/ai-building-code-compliance-tools-compared/"}]},{"id":"model-based-compliance","name":"Model-based building code compliance","synonyms":["model-based code checking"],"category":"digital-compliance","definition":"Evaluating code compliance directly within the BIM model during design, rather than reviewing drawings after they are complete. Issues are tied to specific model elements and surface while changes are still inexpensive to make.","dependsOn":["bim"],"enables":["native-bim-compliance"],"related":["automated-code-checking"],"audiences":["Architects"],"sources":[{"label":"What is model-based building code compliance?","href":"/resources/what-is-model-based-building-code-compliance/"}]},{"id":"ai-building-code-compliance","name":"AI building code compliance","synonyms":["AI code checking","AI code compliance"],"category":"digital-compliance","definition":"The use of artificial intelligence in checking building designs against applicable regulations. AI is genuinely good at reading, structuring, and cross-referencing large bodies of regulatory text. But a building permit is a high-trust decision, so trustworthy compliance systems pair AI with deterministic evaluation and direct citations to authoritative code sources. The role of AI is to accelerate regulatory understanding, not to replace professional judgment.","whyItMatters":"The test for any AI compliance tool is verifiability: can a licensed professional trace every result back to the exact section, paragraph, and amendment behind it, and confirm it independently? If the answer is no, the tool is producing opinions, and the architect who seals the drawings is absorbing the risk. Where the code genuinely requires interpretation, the honest behavior is to say so rather than to guess fluently.","dependsOn":["machine-readable-codes","code-citation"],"related":["automated-code-checking","compliance-intelligence"],"confusedWith":[{"term":"Code chatbots","distinction":"A general chatbot summarizes code text fluently but cannot guarantee a citation or a deterministic result. Fluency without verifiability is exactly the failure mode that matters in a permit context."}],"question":{"q":"Can AI be trusted to check building code?","a":"Only when every result is verifiable: cited to the exact source text and evaluated deterministically rather than generated. The architect stays responsible either way, which is why verifiability is the non-negotiable property."},"audiences":["Architects","Jurisdictions","Technology companies"],"sources":[{"label":"AI building code compliance","href":"/ai-building-code-compliance/"},{"label":"Where AI doesn't belong","href":"/resources/where-ai-does-not-belong/"}]},{"id":"automated-code-checking","name":"Automated code checking","synonyms":["automated compliance checking","code checking"],"category":"digital-compliance","definition":"Software evaluation of a building design against code requirements, replacing manual cross-referencing of drawings and code books. Checks run against the BIM model or exported drawings and return a list of issues.","whyItMatters":"The idea is decades old; what changed is the inputs. Structured code data and data-rich models now exist at the same time, which is why checking has moved from research prototypes and one-off scripts into design software itself.","dependsOn":["machine-readable-codes","bim"],"enables":["continuous-compliance"],"related":["native-bim-compliance"],"audiences":["Architects","Technology companies"],"sources":[{"label":"What tools exist in Revit?","href":"/resources/what-tools-exist-for-building-code-compliance-in-revit/"}]},{"id":"code-citation","name":"Code citation","synonyms":["code reference"],"category":"digital-compliance","definition":"A reference to the exact code section, paragraph, and adopted amendment behind a requirement or a flagged issue. Citations let an architect verify a finding against the source text instead of taking a summary on faith.","whyItMatters":"For public agencies the same property matters in reverse: a review decision backed by a citation is defensible, auditable, and consistent across reviewers in a way an unsourced judgment is not. In compliance software, citations are the difference between an answer and an opinion.","dependsOn":["machine-readable-codes"],"enables":["ai-building-code-compliance"],"related":["plan-check"],"question":{"q":"Why do citations matter if the software is usually right?","a":"\"Usually right\" is not a permit standard. A citation converts a claim into something a professional can verify in the source text, which is what makes the result usable in a sealed drawing set or a public review decision."},"audiences":["Architects","Jurisdictions"],"sources":[{"label":"Citations, not summaries","href":"/resources/citations-not-summaries-ai-for-code/"}]},{"id":"bim","name":"BIM (Building Information Modeling)","synonyms":["Building Information Modeling"],"category":"technology","definition":"The practice of designing a building as a structured 3D model whose elements carry data: walls know their fire rating, doors know their width and swing direction. Because the model is data rather than lines on a sheet, software can query it.","whyItMatters":"For compliance, BIM is the enabling half of the equation. Code checking needs two structured inputs, the design and the regulation, and BIM supplied the first one years before the second existed.","enables":["native-bim-compliance","automated-code-checking","digital-twin"],"related":["revit","ifc"],"question":{"q":"Is BIM required for automated code checking?","a":"Model-side checking needs a model; that is where element-level results and live feedback come from. Drawing-based tools exist, but they check exported artifacts after the fact rather than the design itself."},"audiences":["Architects","Technology companies"],"sources":[{"label":"How compliance is moving into the BIM model","href":"/resources/how-building-code-compliance-is-moving-into-the-bim-model/"}]},{"id":"revit","name":"Revit","synonyms":["Autodesk Revit"],"category":"technology","parent":"bim","definition":"Autodesk’s BIM authoring platform and the most widely used in United States architectural practice. Because Revit models are structured data with a plugin API, they can be checked programmatically while the design is being worked on.","related":["bim","api"],"audiences":["Architects","Technology companies"],"sources":[{"label":"What tools exist in Revit?","href":"/resources/what-tools-exist-for-building-code-compliance-in-revit/"}]},{"id":"ifc","name":"IFC (Industry Foundation Classes)","synonyms":["Industry Foundation Classes"],"category":"technology","definition":"An open, vendor-neutral file format for exchanging BIM data between software platforms. IFC lets a model authored in one tool be read by another.","whyItMatters":"IFC matters to permitting because it is the format public agencies can standardize on without endorsing a vendor. Jurisdictions that accept model-based submissions typically specify IFC, which makes export quality a compliance concern in its own right.","dependsOn":["bim"],"enables":["digital-permitting"],"related":["revit"],"audiences":["Jurisdictions","Technology companies","Architects"],"sources":[{"label":"buildingSMART — IFC","href":"https://www.buildingsmart.org/standards/bsi-standards/industry-foundation-classes/"}]},{"id":"digital-twin","name":"Digital twin","category":"technology","parent":"bim","definition":"A data-rich digital counterpart of a physical building, kept current with information from the built asset through its operating life.","whyItMatters":"Compliance is usually discussed as a design-phase problem, but buildings drift from their approved state over years of tenant improvements and operations. The same structured model data that supports design-phase checking is what makes ongoing, as-operated compliance evaluation conceivable for owners.","dependsOn":["bim"],"related":["structured-compliance-data-layer"],"audiences":["Owners & developers","Technology companies"]},{"id":"api","name":"API (Application Programming Interface)","category":"technology","definition":"A defined interface that lets one piece of software query another’s data or capabilities. APIs are how BIM platforms, structured code data, and permitting systems connect to each other.","whyItMatters":"The ICC’s Code Connect API, which serves official code content programmatically, is a concrete example: it turns the code book from a document into a service. Compliance tooling is largely the work of composing interfaces like these into a workflow architects never have to leave.","enables":["machine-readable-codes"],"related":["icc","revit"],"audiences":["Technology companies"]},{"id":"plan-check","name":"Plan check (plan review)","synonyms":["plan review","permit review"],"category":"permitting","definition":"The AHJ’s review of submitted construction documents for code compliance before a permit is issued. Reviewers examine the drawing set against the adopted codes and amendments and either approve it or issue corrections.","whyItMatters":"Plan check is where compliance problems become schedule problems: review queues run weeks to months in many cities, and each correction cycle repeats the wait. For jurisdictions, the pressure runs the other way, high submission volumes against limited reviewer capacity. Both sides benefit when submissions arrive already checked, which is the practical argument for moving compliance upstream of submission.","dependsOn":["ahj"],"related":["corrections","continuous-compliance","digital-permitting"],"confusedWith":[{"term":"Inspection","distinction":"Plan check reviews the documents before construction; inspection checks the built work in the field. A project passes through both."}],"audiences":["Architects","Jurisdictions","Owners & developers"],"sources":[{"label":"Why design-phase compliance beats plan check rework","href":"/resources/compliance-during-design-beats-plan-check-rework/"}]},{"id":"corrections","name":"Corrections & resubmittals","synonyms":["correction letter","plan check comments"],"category":"permitting","parent":"plan-check","definition":"The AHJ’s written list of code issues found during plan check, and the revised submission that answers them. A project cycles through corrections and resubmittals until the reviewer is satisfied.","whyItMatters":"The asymmetry is the point: an issue that takes minutes to fix in early design takes a full correction cycle to fix after submission, with redrawn sheets, re-coordination, and another turn in the review queue. Correction counts are also one of the few compliance metrics both firms and jurisdictions already track, which makes them the natural measure of whether design-phase checking is working.","dependsOn":["plan-check"],"related":["rework","continuous-compliance"],"audiences":["Architects","Owners & developers","Jurisdictions"]},{"id":"digital-permitting","name":"Digital permitting","synonyms":["e-permitting","model-based permitting"],"category":"permitting","definition":"The movement of permit submission and review from paper and PDF to structured digital processes, up to and including review performed against the BIM model itself.","whyItMatters":"For jurisdictions, structured submissions promise faster, more consistent review with the same staff. For design teams, the same structure makes requirements checkable before submission instead of discoverable after. Digital permitting and design-phase compliance are the two ends of one shift: permitting starts long before permit submission.","dependsOn":["jurisdiction","ifc","machine-readable-codes"],"related":["ahj","structured-compliance-data-layer"],"confusedWith":[{"term":"E-submission","distinction":"Uploading PDFs to a portal digitizes paper handling, not review. Digital permitting proper means the submission itself is structured data an authority can evaluate consistently."}],"question":{"q":"Is digital permitting the same as submitting PDFs online?","a":"No. Online PDF submission changes how documents move, not how they are reviewed. Digital permitting means structured submissions, up to the model itself, that support consistent, partially automatable review."},"audiences":["Jurisdictions","Technology companies","Architects"]},{"id":"rework","name":"Rework","category":"permitting","definition":"Design and documentation effort spent redoing completed work after an issue surfaces late: moving a wall after coordination is locked, redrawing sheets, rechecking everything that was built on the earlier assumption.","whyItMatters":"Late-discovered code issues are one of the largest avoidable sources of rework in practice, and the least visible, because the cost is spread across the team as overtime rather than invoiced as a line item. Owners feel it as schedule; firms feel it as margin.","related":["corrections","continuous-compliance","egress"],"audiences":["Architects","Owners & developers"]}]}