The plan review process is the technical check your construction documents go through before a building department issues a permit. Local reviewers, along with the fire marshal, zoning staff, and sometimes environmental or health officials, compare your drawings against the International Building Code and the other codes your jurisdiction has adopted to confirm the project will be safe and lawful to build.1International Code Council. International Building Code A straightforward residential submission often clears in two to four weeks. Missing documents or code problems can push that out by months.
When Your Project Triggers a Plan Review
If your project changes a building’s structure, layout, or mechanical systems, you need a permit, and getting a permit means going through review. New construction, additions, major renovations, and any change to a building’s use or occupancy classification all qualify. So does installing or altering electrical, gas, mechanical, or plumbing systems.
The IBC exempts routine maintenance and cosmetic work that doesn’t touch structural or life-safety elements:2UpCodes. IBC 105.2 Work Exempted From Permit
- Painting, wallpapering, tiling, carpeting, and installing cabinets or countertops.
- Patching plaster on non-rated walls, caulking, and replacing window screens.
- Like-for-like replacement of roofing, siding, gutters, or driveways with matching materials.
- A single garden shed under 50 square feet and less than 10 feet tall, or playground equipment for a one- or two-family home.
- Retaining walls four feet or shorter for one- and two-family homes where land disturbance is minimal.
Local jurisdictions add and subtract from this list, so a five-minute call to the building department beats assuming your project is exempt. Starting permit-required work without a permit is far more expensive than submitting for review.
What You Have to Submit
The IBC requires at least two complete sets of construction documents with every permit application, and most departments want more.3UpCodes. IBC Section 107 Submittal Documents The specifics vary by project type, but most packages share the same components.
Site Plan and Architectural Drawings
The site plan shows property boundaries, existing structures, setback distances, easements, and any proposed changes to grading. Architectural drawings detail the internal layout: room dimensions, door and window placement, wall sections, and ceiling heights. Together they tell reviewers where the building sits on the lot and how the interior is organized.
Structural Documents
Structural calculations demonstrate the building can carry dead loads, live loads, wind, seismic forces, and where applicable, snow. Foundation details, beam sizes, connection hardware, and load paths all need to be spelled out. For projects above a certain size or complexity, the IBC requires that a licensed architect or professional engineer prepare and seal the construction documents.3UpCodes. IBC Section 107 Submittal Documents The threshold varies by state. Small residential projects like a deck or interior remodel are often exempt from the seal requirement; commercial and multistory buildings almost always need one.
Energy Compliance Report
Most jurisdictions require proof that the building envelope meets the applicable energy code. For residential projects (detached homes and multifamily buildings three stories or fewer), the U.S. Department of Energy’s REScheck tool generates a pass/fail compliance report based on your insulation values, window types, and slab details.4U.S. Department of Energy. REScheck Commercial and high-rise residential projects use COMcheck.5Pacific Northwest National Laboratory. COMcheck-Web Submitting the certificate with your plans avoids a guaranteed correction notice.
Mechanical, Plumbing, and Electrical Schematics
Separate sheets show HVAC ductwork, plumbing layouts, and electrical circuits so reviewers can check compliance with the International Plumbing Code, the National Electrical Code, and the International Mechanical Code. Fixture counts, pipe sizes, circuit loads, panel schedules, and equipment locations all need to appear. Incomplete drawings here are one of the most common reasons plans get sent back.
Application and Fees
Application forms come from the department’s online portal or permit counter. You provide the property’s legal description, estimated construction value, scope of work, and the names and license numbers of the professionals involved. Many departments collect a plan review fee at submission, often calculated as a percentage of the total permit fee or as a flat charge based on project value. Mismatched addresses or unlisted contractors can burn a week before reviewers even open your drawings.
Accessibility Compliance
Reviewers also check whether your design meets federal accessibility law. The 2010 ADA Standards for Accessible Design apply to new construction and alterations of commercial buildings, government facilities, and places of public accommodation, and reviewers verify specific dimensional requirements like door clear widths, running slopes on accessible routes, and restroom clearances.6ADA.gov. ADA Standards for Accessible Design7ADA.gov. 2010 ADA Standards for Accessible Design The Fair Housing Act adds a separate layer for multifamily housing with four or more units under 42 U.S.C. ยง 3604(f), covering accessible entrances, wider doors, reinforced bathroom walls, and usable kitchens and bathrooms.8Office of the Law Revision Counsel. United States Code Title 42 – 3604 In elevator buildings, every unit must comply. In non-elevator buildings, the rules apply to all ground-floor units. Correcting these features after construction has started is extraordinarily expensive.
Who Actually Reviews Your Plans
Your submission doesn’t sit on one desk. Multiple departments evaluate it in parallel, each looking at a different slice.
- The building department runs the primary review, checking structural integrity, general code compliance, and whether the documents are complete.
- The fire marshal evaluates emergency exits, suppression systems, detection, fire-rated assemblies, and occupant load calculations. High occupancy or hazardous materials get heavier scrutiny.
- The zoning or planning department confirms compliance with land-use rules: height limits, lot coverage, setbacks, parking, and allowed uses for the district.
- The environmental or health department reviews stormwater, septic, wetlands, or floodplain concerns when the project affects them.
Every department has to sign off independently. A project that clears the building department but fails zoning is still stuck. The slowest reviewer sets your timeline.
How the Review Moves From Intake to Approval
Intake
You submit the package through the jurisdiction’s online portal or at the permit counter. A permit technician checks that forms are signed, fees are paid, and the submission is complete enough for technical reviewers to start. An incomplete package gets returned here, which is an avoidable delay.
Concurrent Review and Correction Notices
After intake, copies of the plans go to each reviewing department for simultaneous evaluation. Reviewers compare the drawings against the applicable code sections and issue correction notices listing specific items that need to change, citing the code provision at issue. You receive them through the tracking system or by mail.
This stage decides whether the process moves or stalls. A thorough, code-compliant submission on a straightforward residential project can clear all departments in two to four weeks. Commercial work, multistory buildings, and anything in a floodplain or historic district generally take longer. What stretches timelines is the back-and-forth of correction cycles, and sloppy resubmissions that only address half the items guarantee another round.
Phased Approval
If your timeline is tight, the IBC lets the building official issue a permit for foundation work before the full set of construction documents has been approved. You break ground on the foundation while upper-floor plans are still under review. The tradeoff: you proceed at your own risk. If the final plans require design changes that conflict with the foundation you’ve already poured, that correction is on you.
Expedited Review
Many departments offer a fast-track option for a premium. Expedited review typically cuts the standard timeline roughly in half and costs an additional surcharge on top of the normal fee, commonly in the range of 30% to 50% extra, though specifics vary widely. Some departments handle expedited review in-house with overtime staff; others contract with licensed third-party engineers or architects. When every week of delay costs money, the expedited fee often pays for itself.
Why Plans Get Sent Back
Reviewers see the same mistakes repeatedly. Fixing these before submission is the single easiest way to shorten your timeline.
- Incomplete or unclear drawings: missing sheets, illegible dimensions, or drawings that don’t match the structural calculations. If a reviewer has to guess, the plans come back.
- Structural deficiencies: undersized beams, inadequate load paths, or missing connection details. Structural review is typically the most rigorous.
- Egress problems: exit doors too narrow, dead-end corridors that exceed maximum length, too few exits for the occupant load, or misplaced exit signs.
- Energy code failures: missing or failing REScheck or COMcheck reports, insulation below required minimums, or window specs that don’t meet the local code.
- Accessibility gaps: doorways below the required clear width, restrooms lacking clearances, or missing accessible routes to entrances.
- Zoning conflicts: a building too tall for the district, too close to a property line, short on parking, or proposing a use the zone doesn’t allow.
Incomplete drawings and structural issues account for a disproportionate share of rejections. Most departments publish a correction checklist; having the design professional who sealed the documents self-review against it catches the obvious problems before submission.
What Happens After Approval
Fees and the Stamped Plans
Once every reviewing department signs off, you pay any remaining permit fees. Some jurisdictions charge a flat rate, some calculate by project value per thousand dollars of construction cost, and some use a per-square-foot formula. After payment, the department issues the official building permit along with a set of stamped, approved plans. Those plans have to stay on the job site during construction. Inspectors reference them at every visit, and working from an unapproved set is treated the same as having no permit.
Permit Expiration
Under the IBC, a building permit becomes invalid if you don’t start work within 180 days of issuance, or if work is suspended or abandoned for 180 days after it begins.9City of Overton. IBC Section 105 Permits The building official can grant written extensions in 180-day increments for a legitimate reason. If your permit expires without an extension, you reapply, which means new fees and potentially a new plan review if codes have changed. For projects with long lead times on materials or financing, request the extension before the deadline.
Inspections
The permit launches the inspection phase. Building officials visit at specific milestones to confirm the work matches the approved plans, following the IBC sequence:
- Footing and foundation, after excavation and reinforcing steel are placed and before concrete is poured.
- Concrete slab and under-floor, after in-slab reinforcement, conduit, and piping are installed.
- Framing, after roof sheathing, framing, fireblocking, and bracing are in place and rough electrical, plumbing, and mechanical have been approved.
- Fire-resistance penetrations in rated assemblies, before they are concealed.
- Energy efficiency: insulation, window performance, duct insulation, and HVAC equipment.
- Final inspection, after all permitted work is complete.
Each inspection has to be approved before the next phase can proceed. Covering up work before it’s inspected earns a correction notice and can require tearing out finished work so the inspector can see what’s underneath.
Certificate of Occupancy
A building cannot legally be occupied until the building official issues a certificate of occupancy after the final inspection confirms compliance with all applicable codes.10UpCodes. IBC 110.1 General Requirement for Certificate of Occupancy The certificate confirms the building meets construction codes and zoning for its intended use. Changing the use or occupancy classification later requires a new certificate even without physical construction. Tenants and lenders routinely require proof of a valid certificate before signing leases or funding draws.
If Your Plans Are Rejected
If a reviewer rejects your plans and you believe the code was misapplied, or that an equivalent alternative design meets the code’s intent, you can appeal. Most jurisdictions maintain a board of appeals made up of qualified professionals who hear disputes between applicants and the building official. The appeal generally has to be filed in writing within a set number of days after the decision, and you have to explain specifically why the reviewer’s interpretation was incorrect or why your alternative approach satisfies the code’s safety objectives.
Appeals are not a way around genuine code deficiencies. The board evaluates whether the code was applied correctly, not whether the code is too strict. If your plans truly violate a code provision and no alternative compliance path exists, an appeal won’t help. When the code allows multiple approaches and the reviewer chose a narrow one, the board can override that call. Having a construction attorney or the design professional who sealed the documents draft the appeal improves the odds.
The Cost of Skipping the Process
Starting construction without an approved permit is one of the most expensive shortcuts in building. Penalties vary but commonly include fines, mandatory stop-work orders, and retroactive permit requirements at increased fees. Some jurisdictions impose daily fines that run until the work is brought into compliance, ranging from a few hundred dollars to several thousand per day depending on the location and severity.
The financial penalty is often the smallest part. A stop-work order halts activity until you obtain proper permits and pass inspections, which can leave partially completed work exposed to weather. If inspectors can’t verify code compliance for work already covered up, they can require you to remove finished work at your expense so they can see what’s behind it. Unpermitted work also creates problems at resale: title companies, appraisers, and buyers’ lenders flag it, and homeowners’ insurance may deny claims for damage tied to unpermitted construction. Plan review can feel slow. The cost of bypassing it is larger.