How to Draw a Site Plan for a Building Permit

Most permit offices are not asking for complicated architectural drawings first.

In many cases, what they really want is a clear, readable site plan that shows your property layout and exactly where the new work will go.

This is where many homeowners get stuck.

You may already know what you want to build. You may even have measurements, sketches, or a contractor.
But before the city reviews your project, they usually need a site plan showing:

• property boundaries
• existing structures
• proposed construction
• setback distances
• driveway and access layout

If the plan is incomplete or unclear, the permit process often slows down immediately.

This guide explains exactly how to draw a site plan for a building permit, what to include, what reviewers usually check first, and how to avoid the most common permit mistakes.

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What Is a Site Plan?

A site plan is a scaled overhead drawing of your property.

It shows the lot boundaries, existing structures, and proposed work so the city can verify that your project fits legally on the property and follows zoning and permit rules.

Permit reviewers commonly use site plans to verify:

• setbacks
• property line distances
• driveway access
• lot coverage
• easement conflicts
• structure placement

A permit-ready site plan usually includes:

• property lines
• lot dimensions
• existing house and structures
• proposed work
• setback distances
• driveway and access
• easements
• north arrow
• drawing scale

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See the full site plan definition guide

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Why Cities Require a Site Plan for Permits

Before approving construction, cities need to verify that the project can legally fit on the property.

That usually means checking:

• how close the project is to property lines
• whether setbacks are met
• whether the project overlaps easements
• whether driveway access is affected
• whether lot coverage limits are exceeded

This is why the site plan is one of the first documents reviewed during permit approval.

Many permit delays happen simply because the drawing is missing setbacks, dimensions, labels, or measurable spacing.

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See the complete permit site plan checklist

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Step 1: Gather Your Property Information

Before drawing anything, collect the property information you will use as the base for the site plan.

This usually includes:

• property survey if available
• lot dimensions
• parcel map
• house footprint measurements
• driveway location
• existing structures like sheds, garages, pools, or fences

If you have a prior survey, that is usually the best starting point because it already shows property lines, lot dimensions, and easements.

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Step 2: Draw the Property Lines

Start with the outer boundary of the lot.

This forms the foundation of the entire site plan.

Clearly draw and label:

• all property lines
• lot dimensions
• front, rear, and side boundaries

This gives permit reviewers the full property layout needed to begin review.

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Step 3: Add Existing Structures

Next, draw everything currently on the property.

This usually includes:

• existing house
• garage
• shed
• pool
• deck
• driveway
• fence if relevant

These structures should be shown in their approximate existing locations so reviewers can understand the current layout of the lot.

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Step 4: Add the Proposed Work

Now draw the project you want the city to approve.

This may include:

• home addition
• garage
• shed
• deck
• pool
• fence
• patio cover
• pergola

Clearly label the proposed work and show its exact footprint and placement on the property.

This is one of the most important parts of the entire plan because it shows exactly what the city is reviewing for approval.

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Step 5: Show Setbacks

This is one of the most important parts of the drawing.

Setbacks show the distance between the proposed work and each property line.

These measurements are usually among the first things permit reviewers check.

Clearly label:

• front setback
• rear setback
• left side setback
• right side setback

Missing setback dimensions are one of the most common reasons site plans get rejected or returned for corrections.

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Learn how setbacks work

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Step 6: Add Driveways, Access, and Easements

Next, add the site features cities commonly review for access and placement.

This usually includes:

• driveways
• walkways
• street frontage
• easements
• right-of-way areas

These details help reviewers confirm the project does not interfere with access or restricted site areas.

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Step 7: Add Scale and North Arrow

Your site plan should always include:

• drawing scale
• north arrow

This helps reviewers orient the property and verify measurements correctly.

Many building departments specifically require both before permit approval can proceed.

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What Permit Reviewers Usually Check First

During permit review, building departments usually scan the site plan very quickly before deciding whether the application moves forward or gets flagged for corrections.

Reviewers commonly check:

• property line distances
• setback compliance
• structure placement
• overall readability
• measurements and scale
• clear labeling

One of the most common reasons permits get delayed is because reviewers cannot immediately understand the drawing.

If measurements are missing or the layout feels confusing, the city often sends the application back for revisions.

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See what permit reviewers usually check first

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Common Mistakes to Avoid

The most common site plan mistakes are usually simple:

• missing setback dimensions
• unclear property lines
• proposed work not labeled
• missing driveway or access
• missing north arrow
• missing scale
• easements not shown
• confusing existing vs proposed structures

These are some of the most common reasons permit offices request corrections before approving the project.

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See why site plans get rejected

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Final Thoughts

Drawing a site plan for a building permit is usually much simpler than homeowners expect.

You do not necessarily need a full architectural package before beginning permit review.

In many cases, what the city needs first is a clear, readable site plan showing:

• the property layout
• existing structures
• proposed work
• setbacks and dimensions

The clearer the drawing is, the easier it becomes for reviewers to verify compliance and move the permit process forward.

The faster reviewers understand the plan, the faster approvals usually happen.