You can draw your own plans for a permit on most straightforward residential projects, as long as your jurisdiction allows homeowner-prepared drawings and the work doesn’t cross into structural territory that legally requires a licensed architect or engineer. The drawings themselves have to satisfy two separate rulebooks (the building code and the local zoning ordinance), be produced at a recognized scale on standard sheets, and include enough technical detail for a plan reviewer to verify every dimension, material, and code requirement without guessing. Get any of that wrong and the package comes back with correction requests that push your start date out by weeks.
Are You Actually Allowed to Draw Them Yourself
Most building departments allow homeowners to prepare construction drawings for simple residential projects on property they own and occupy. A deck, a bedroom addition, a bathroom remodel, or a detached garage are all projects homeowners routinely draft themselves.
The limit is structural complexity. Once a project involves removing load-bearing walls, altering foundation systems, modifying fire-rated assemblies, or changing the building’s means of egress, most jurisdictions require the plans to carry the stamp of a licensed architect or structural engineer. The exact threshold varies by state. Some set a square-footage cutoff or story-height limit, others focus on project type regardless of size, and a few draw the line at occupancy classification, allowing homeowner-drawn plans only for single-family homes.
Call your building department before you start drawing if there’s any structural element in play. Submitting plans that legally require a professional stamp is an automatic rejection, and the department won’t even review the technical content until that requirement is met.
Research the Codes and Zoning That Apply to Your Property
Every permit set has to satisfy two independent bodies of rules: building codes that govern how you construct, and zoning ordinances that govern what you can build and where. Overlooking either is a common first-timer mistake.
Building Code
The International Residential Code, published by the International Code Council, serves as the base residential building code in 49 states, with each state and many localities amending it. California replaces it entirely with its own California Building Standards Code (Title 24), which adds stringent seismic, energy, and fire safety requirements. Your local building department’s website identifies which edition is currently in effect, and that’s the version your plans need to satisfy.
The code sets minimums for structural framing, fire separation, emergency egress, ceiling heights, staircase dimensions, ventilation, and insulation values. Your floor plan has to show bedroom windows that meet minimum egress size. Your sections have to demonstrate adequate header sizes over openings. Your insulation specifications have to meet the thermal requirements for your climate zone. The plan reviewer checks each detail against the adopted code.
Zoning
Zoning rules control what happens on your specific parcel: how far structures must sit from property lines, how tall they can be, how much of the lot they can cover, and what uses are permitted. A project that is sound from a code standpoint can still be rejected outright for violating a setback or exceeding the allowable lot coverage. Those parameters live on your site plan, and reviewers usually check them first.
Setbacks vary not just by zone but by which line you’re measuring from. Front setbacks are typically larger than side setbacks. Corner lots sometimes carry two front setbacks. Accessory structures like detached garages or sheds often follow different setback rules than the primary dwelling. Get these numbers from your city or county planning department and confirm which measurement applies to your project.
Measure the Site Before You Draw Anything
Accurate field measurements are the foundation of every drawing you’ll produce. Measure every dimension of existing structures, including wall thicknesses, ceiling heights, and the exact location of doors and windows. Record grade changes across the site, because they affect foundation design and drainage. If you’re adding to an existing building, measure it thoroughly rather than trusting old plans or tax records, which are often wrong.
Confirm your property boundaries next. Most departments accept a recorded plat map from the county recorder’s office for straightforward projects, but some require a current survey from a licensed land surveyor, particularly for irregular lots or projects sitting near a property line. A certified survey costs money, but far less than discovering after construction that your addition sits over a neighbor’s line or a utility easement.
Mark the Utilities
Before any excavation, every state requires you to contact the 811 “Call Before You Dig” service 48 to 72 hours in advance, depending on state.1Pipeline and Hazardous Materials Safety Administration. Stakeholder Communications: CBYD Local utility companies then mark the approximate location of buried lines on your property at no charge. Hitting a gas line because you didn’t call can result in serious injury, and damaging any utility line exposes you to liability for repairs and service disruption. Mark those utility locations on your site plan so the building department can see that your foundation, trenches, and connections won’t conflict with what’s already in the ground.
The Sheets You Actually Need to Draw
A complete permit package is a set of distinct drawings, each showing the project from a different vantage or level of detail. A deck or simple interior remodel may only need two or three sheets. An addition or new construction typically needs the full set.
Site Plan
The site plan shows your entire property from above, with every existing and proposed structure drawn to scale. It has to include setback dimensions, driveways and walkways, utility connections, easements, and relevant topographic features like slopes or drainage paths. This is where the reviewer confirms zoning compliance, so accuracy here prevents the most common rejection.
Floor Plans
Floor plans present the interior layout as if you sliced the building horizontally about four feet above the floor and looked down. Show room dimensions, wall locations and thicknesses, door swings, window sizes and placement, staircase dimensions, and the intended use of each room. Label the use, because the code applies different requirements to bedrooms, bathrooms, kitchens, and living areas. Every bedroom needs an egress window of a specific minimum size, and bathrooms need exhaust ventilation.
Elevations
Elevations show each exterior face of the building as a flat, straight-on view. They document roofline height, floor levels, window and door placement, exterior finishes, and how the building sits relative to surrounding grade. Reviewers use elevations to verify that the structure won’t exceed the zoning height limit.
Sections
Sections cut vertically through the building to reveal what’s inside the walls, floors, and roof. Show foundation details (footing dimensions, rebar placement, depth below grade), wall framing (stud size and spacing, headers over openings), floor joist size and spacing, roof rafters or trusses, and insulation placement. This is where you demonstrate that the building will stand up, and reviewers scrutinize sections more closely than almost any other sheet. Structural changes usually push section drawings into the territory that requires an engineer.
Electrical, Mechanical, and Energy Documentation
Depending on scope, the department may require additional technical sheets beyond the basic architectural set. These requirements have expanded as energy codes have tightened.
Electrical
Work involving new circuits, panel upgrades, or service changes usually requires an electrical plan showing circuit layouts, outlet and switch locations, panel schedules with load calculations, and the placement of smoke and carbon monoxide detectors. Simple additions of a few outlets may not need a standalone electrical drawing, but a new panel, a service upgrade, or work in a multi-story building almost certainly will. Local thresholds vary, so ask.
HVAC and Manual J
New construction and major additions in roughly 29 states require a Manual J heating and cooling load calculation with the permit application. Manual J is a standardized method from the Air Conditioning Contractors of America that sizes HVAC equipment based on square footage, insulation values, window area, orientation, climate zone, and duct configuration. Your HVAC contractor can prepare it, or you can generate it with software that follows the ANSI/ACCA 2 standard.
Energy Code Compliance
Most jurisdictions require proof that your project meets the adopted energy code, typically based on the International Energy Conservation Code. The most common way to demonstrate compliance is a REScheck report generated through the Department of Energy’s free online tool at energycodes.gov.2Building Energy Codes Program. Compliance Tools Enter the project’s location, wall and ceiling insulation values, window specifications, and foundation type, and the software tells you whether the assembly meets minimum thermal performance. Print the compliance certificate and include it with your plans. A failed REScheck means upgrading insulation or windows before approval.
Drafting Conventions Reviewers Expect
Building departments don’t care whether you use CAD software or draft by hand, but they do care that the drawings are clear, consistent, and drawn to a recognized scale. Most departments expect floor plans and sections at 1/4 inch equals one foot, with site plans at a smaller scale like 1/8 inch or 1/16 inch equals one foot depending on lot size. If the department hasn’t published a preferred scale, call and ask. Submitting at the wrong scale means redoing the entire set.
Standard architectural sheet sizes are 18 by 24 inches and 24 by 36 inches. Some departments accept the smaller size for simple projects and require the larger for anything complex. Every sheet needs a title block in the lower right corner with the project address, property owner’s name, designer’s contact information, the sheet number, the date, and a revision log. The title block is how the department tracks your project through review; leaving it incomplete causes administrative delays even when the drawings themselves are correct.
Annotate everything. Label wall materials (wood frame, concrete block), framing sizes (2×4 versus 2×6 studs), insulation types and R-values, concrete specifications, and fastener schedules. Use standard architectural symbols for doors, windows, outlets, plumbing fixtures, and appliances, and include a legend on each sheet defining them. Drawings that look clean but leave a reviewer guessing about materials come back with correction requests as fast as ones with dimensional errors.
Why Homeowner-Drawn Plans Get Rejected
The rejections building departments issue over and over fall into a short list. Check your set against it before you submit.
- Setback violations, especially where a roof overhang projects into the required setback. Many jurisdictions measure to the outermost projection, not just the wall face.
- Missing or outdated survey when the project sits near a property line and the reviewer can’t verify setback dimensions.
- Easement encroachments. Building within a utility easement is usually prohibited, and easement locations often surprise homeowners.
- Incomplete structural details in sections: missing footing dimensions, header sizes, or connection details. Reviewers can’t approve what they can’t verify.
- Missing energy compliance. Skipping the REScheck report or insulation specifications is one of the easiest rejections to prevent and one of the most common.
- Illegible or unscaled drawings. Freehand sketches without dimensions, or plans drawn at a non-standard scale without notation, won’t pass review regardless of the design.
When corrections come back (often called “redlines” or “plan check comments”), read every one carefully before resubmitting. Addressing some comments and missing others resets the review clock. Treat the correction letter as a checklist and confirm every item is resolved before the resubmission goes back in.
Submitting the Application
Many departments now accept or require digital submissions through online permit portals. Digital plans are typically uploaded as flattened PDFs so layers can’t be edited accidentally. Check file size limits and naming conventions first; some systems reject files that don’t match a specific naming format.
Filing fees vary widely. Some departments charge a flat fee for small projects and a percentage of estimated construction value for larger ones. Costs range from under $100 for a simple trade permit like an electrical panel swap to several thousand dollars for new home construction, with most residential renovation permits falling in between. Separate plan review fees, technology surcharges, and state surcharges may be added on top. Ask for a fee estimate before you submit.
Plan review timelines vary too. Some smaller departments turn simple residential projects around in a week or two. Larger or busier jurisdictions may take 30 business days or more for an initial review. Resubmissions after corrections usually go faster but still require another cycle. If your project is time-sensitive, ask the department about current turnaround before you file, and build the wait into your schedule.
After Approval: Inspections and Expirations
Approval is a milestone, not the finish line. Once construction starts, the department requires inspections at specific stages before you can cover the work. The typical sequence for a residential project includes a foundation inspection after forms are set but before concrete is poured, a framing inspection after structural elements are in place but before insulation and drywall, rough inspections for electrical and plumbing, an insulation inspection, and a final inspection before the space can be occupied. Skipping an inspection or covering work before the inspector signs off means tearing it open for review.
Keep a set of your approved, stamped plans at the job site throughout construction. Inspectors compare the work against those drawings, and most departments won’t conduct an inspection if the plans aren’t on site. If you need to deviate from the approved plans during construction, contact the department before making the change. Minor deviations may be approved in the field; significant ones typically require a formal plan revision and another review.
Most permits expire if work isn’t started within a set period, commonly six to twelve months from issuance, and can also expire if work stops for an extended period. A lapsed permit means applying for a renewal or an entirely new permit, paying additional fees, and potentially bringing plans into compliance with any code changes that took effect in the meantime. Start the project within the permitted window, keep it moving, and request an extension from the department if delays look likely.