When you apply for a building permit, zoning review, or HOA approval, one of the first drawings you may be asked for is a site plan. A site plan shows the layout of your property from above, including the existing structures, proposed project, property lines, setbacks, driveway, sidewalks, utilities when known, and other important site features.

SitePlanPros.com provides site plan drafting services for homeowners who need a clear, easy-to-read drawing for residential permit applications. Whether you are planning a shed, deck, fence, pool, garage, patio cover, driveway, addition, or other home improvement project, a well-prepared site plan helps explain the project before work begins.

Why Homeowners Need a Site Plan

A site plan helps a permit office understand what you want to build and where it will be located. Instead of only describing the project in words, the drawing shows the relationship between the proposed work, the existing house, the property lines, and the surrounding site features.

The International Residential Code says construction documents submitted with a permit application should be accompanied by a site plan or plot plan showing the size and location of new construction, existing structures on the site, and distances from lot lines. Source: International Code Council – IRC R106.2 Site Plan or Plot Plan.

In practical terms, the site plan answers a simple question: does the proposed project fit on the property in a way that can be reviewed?

Before ordering or submitting a drawing, homeowners can use our permit site plan checklist to review the information commonly required.

What We Include in a Homeowner Site Plan

Every property and project is different, but a typical homeowner site plan may include the following details when they are available or needed for the project:

• Property lines and lot dimensions
• Existing house or main residence
• Existing garage, shed, deck, patio, pool, driveway, walkway, or other structures
• Proposed project location and dimensions
• Setback distances from property lines
• Distance from proposed work to existing structures
• Driveway, sidewalk, street, alley, or access labels
• Utility locations when known or provided
• Easements when available
• Fences, trees, landscaping, or site features when relevant
• Drainage direction or site notes when needed
• North arrow and scale
• Clear labels for existing and proposed work

The goal is to create a clean drawing that helps the homeowner, contractor, HOA, and permit reviewer understand the project quickly.

Our article explaining what permit reviewers check first on a site plan covers the details that should be easy to locate at a glance.

Property Lines and Dimensions

Property lines are one of the most important parts of a site plan. They show the legal boundaries of the lot and help determine where the project can be placed.

A common mistake is using a fence, hedge, driveway edge, or landscape border as the property line. Those features are not always located exactly on the legal boundary. A site plan should show the property lines separately and then show the proposed work in relation to those lines.

If you have a survey, plat map, parcel map, or county assessor map, it can help improve the site plan. If no survey is available, the drawing may be based on public parcel data, aerial imagery, owner-provided measurements, and project details. Homeowners should always verify property dimensions and local requirements before construction.

A drafted site plan is not the same as a licensed boundary survey. Our guide comparing a site plan and survey explains when verified boundary information may be required.

Existing Structures

A good site plan should show what already exists on the property. This usually includes the house, garage, driveway, walkways, patios, decks, sheds, pools, fences, retaining walls, and other visible improvements.

Showing existing structures helps the reviewer understand how the proposed project fits into the current layout. It also helps avoid confusion between what is already built and what is being proposed.

The City of Portland says building permit applications must have a complete and accurate site plan, and its residential site plan guide explains the common items shown on a sample site plan. Source: City of Portland – Drawing a Site Plan.

Proposed Work

The proposed project should be clearly labeled and dimensioned. If you are building a shed, the site plan should show the shed footprint and size. If you are adding a deck, the plan should show the deck location, dimensions, stairs if relevant, and distance to property lines. If you are widening a driveway, the plan should show the existing and proposed driveway areas.

Common proposed projects include:

• Sheds
• Decks
• Fences
• Pools and spas
• Garages
• Carports
• Patio covers
• Home additions
• Driveway changes
• Accessory dwelling units
• Retaining walls
• Mechanical equipment placement

The City of Elk Grove says a site plan is required when exterior work is proposed on a residential property, with examples including room additions, garage and carport additions, decks, patio enclosures, exterior covers, sheds, pools, spas, fences, retaining walls, and underground electrical or gas line work when a building permit is required. Source: City of Elk Grove – Sample Residential Site Plan.

Project-specific information is available in our guides covering shed permit site plans, deck permit site plans, fence permit site plans, and pool permit site plans.

Setbacks and Distances

Setbacks are the required distances between a structure and the property lines. For many homeowner projects, setbacks are one of the main reasons a permit office asks for a site plan.

A site plan should show how far the proposed project is from the front, side, and rear property lines. It may also need to show the distance between the proposed project and existing structures, especially when the project is close to the house, garage, fence, driveway, easement, or neighboring property.

Clear setback dimensions help reviewers check whether the project appears to fit within local zoning rules. They also help homeowners avoid placing a structure too close to a property line.

Driveways, Walkways, and Access

Access features are often important on a homeowner site plan. A driveway, walkway, sidewalk, alley, or street frontage can affect where a project can be located and how people or vehicles move through the property.

For driveway, garage, carport, ADU, or parking-related projects, the site plan should show the access path clearly. For backyard projects, it can also help to show walkways, gates, patios, or other routes used to reach the proposed improvement.

Related guidance includes our articles on driveway permit site plans, driveway widening site plans, garage permit site plans, and carport permit site plans.

Utilities When Provided

Utility locations can be important for projects that involve digging, foundations, posts, pools, detached structures, additions, or utility connections. A site plan may show water, sewer, gas, electric, storm drainage, or mechanical equipment locations when the information is available.

Utility lines shown on a homeowner site plan are often approximate unless they come from a survey, utility record, or field verification. Before digging, homeowners and contractors should contact the proper utility marking service and verify utility locations in the field.

The Town of Chapel Hill lists utilities, easements, existing hard surfaces, setbacks, proposed work, and existing conditions among residential site plan requirements. Source: Town of Chapel Hill – Site Plan Requirements.

Easements and Site Restrictions

An easement is an area of the property where another party may have rights for access, utilities, drainage, or other purposes. If easements are known, they should be shown on the site plan because they can affect where a structure can be placed.

For example, a shed, pool, addition, or fence may be restricted if it conflicts with a utility easement, drainage easement, access easement, or recorded setback area. If you have a survey or title document showing easements, provide it before the site plan is drafted.

North Arrow and Scale

A site plan should include a north arrow and scale when possible. These details help the viewer understand orientation and distance. Even a simple residential site plan becomes much easier to read when it is organized, scaled, and labeled clearly.

A clean plan should not look like a rough sketch. The drawing should be arranged so the property lines, structures, proposed work, setbacks, and key site features can be reviewed without confusion.

What Homeowners Should Provide

To prepare a better site plan, homeowners should provide as much useful information as possible. Helpful items include:

• Property address
• Project type
• Project dimensions
• Preferred project location
• Survey, plat, or parcel map if available
• Photos of the property
• Sketches or contractor drawings
• Measurements from the proposed work to property lines
• Utility or easement information if known
• Permit checklist from the city or county if available

The more accurate the information, the better the final drawing can be. If a permit office requires a licensed survey, engineer stamp, architect drawing, grading plan, or structural details, those requirements should be followed.

What We Do Not Replace

A site plan drafting service is helpful for many residential permit and planning needs, but it is not the same as every type of professional document.

Depending on the project and local rules, you may still need:

• A boundary survey
• An engineer-stamped plan
• Architectural drawings
• Structural calculations
• Grading or drainage plans
• Energy compliance documents
• Licensed contractor drawings
• HOA-specific forms or exhibits

Many homeowners only need a clear site plan for a simple permit or HOA review. Other projects require more detailed documents. Always check the local permit requirements before submitting.

More complex projects such as a home addition, ADU, screened porch, or sunroom addition commonly require construction drawings in addition to the site plan.

Why a Professionally Drafted Site Plan Helps

A professionally drafted site plan can save time because it organizes the information into a format that is easier to understand. Instead of a messy sketch or screenshot, the drawing shows the lot layout, proposed work, and key measurements in a clean permit-focused format.

A good site plan can help:

• Clarify the project location
• Show setbacks clearly
• Separate existing structures from proposed work
• Support permit or HOA review
• Help contractors understand the planned layout
• Reduce avoidable back-and-forth
• Identify possible site conflicts earlier

No site plan can guarantee permit approval, because each city, county, HOA, and project has its own rules. But a clear drawing can make the review process easier to follow.

Common Site Plan Mistakes Homeowners Make

Many site plan issues come from missing or unclear information. Common mistakes include:

• Not showing property lines
• Using a fence line as the property line
• Leaving out the existing house or garage
• Not labeling the proposed project
• Forgetting project dimensions
• Leaving out setback distances
• Not showing driveways, sidewalks, or streets
• Forgetting easements or utilities when known
• Submitting a plan that is too blurry or hard to read
• Not checking the local permit checklist first

Our guide explaining why site plans get rejected or delayed covers the most common correction requests and missing details.

Final Thoughts

A site plan drafting service for homeowners should make the permit process easier to understand. A good site plan shows the property layout, existing structures, proposed work, setbacks, driveways, access, utilities when provided, easements when known, site features, north arrow, and scale.

SitePlanPros.com helps homeowners create clear, permit-focused site plans for residential projects such as sheds, decks, fences, pools, garages, additions, driveways, patio covers, and more.

Homeowners preparing to submit can also review our guide on what permit reviewers check first before sending the application to the city or county.

Sources

• International Code Council – IRC R106.2 Site Plan or Plot Plan
• City of Portland – Drawing a Site Plan
• City of Elk Grove – Sample Residential Site Plan
• Town of Chapel Hill – Site Plan Requirements