A site plan (sometimes called a plot plan or lot plan) is the map reviewers use to understand what you are proposing on a piece of land. It is not the same thing as architectural floor plans, structural sheets, or a boundary survey, though it often borrows information from all of them. If you are preparing a permit submittal, a lender package, or a feasibility memo for a client, the site plan is usually the first drawing people open because it answers the single most important question: what exists on the lot today, and what will change?
This guide walks through what a strong site plan includes, a repeatable workflow you can use on real projects, and the mistakes that most often slow down permitting. Along the way, you will see where modern tools (including Siteplanr) can help you validate setbacks and zoning context using an address, so you spend less time guessing and more time drafting.
What a site plan is (and what it is not)
At a high level, a site plan is a scaled plan view of the parcel and its surroundings, showing improvements such as buildings, driveways, walks, decks, pools, ADUs, utilities, easements, and significant landscape features. It should make the lot boundaries, property lines, and dimensions to critical edges legible, and it should relate proposed work to those lines clearly enough that a plan checker can compare your drawing to the code.
A boundary or topographic survey prepared by a licensed surveyor may be a source for your site plan, but the site plan itself is typically a design document created by the design team. Floor plans show the inside of a building; the site plan shows how that building sits on the land. Keep those roles separate in your sheet index so reviewers do not have to hunt for basic orientation information.
What plan reviewers are usually looking for
City and county checklists differ, but the site plan sheet is almost always answering the same questions: where is the parcel, what exists today, what is changing, and how far is work from the lines that drive compliance. A complete permit package still spans other sheets and consultants—circulation, utilities, easements, title blocks, engineer of record, and civil addenda are real work that no single lookup replaces.
Treat the list below as orientation, not a guarantee that one tool or template will check every box. Mark what you will still draw, delegate to survey or civil, or confirm with the AHJ.
- Orientation: north arrow and a readable scale (add a graphic scale bar when you can).
- Parcel story: lot lines and the dimensions that help a reader understand shape and context.
- Structures: existing and proposed footprints labeled so the compliance story is obvious.
- Setbacks and spacing: distances to front, side, and rear lines (and other controlling lines your code uses).
- Everything else on the checklist—decks, fences, protected trees, driveways, parking, utilities, easements, title block, stamps—usually stays in your CAD/BIM workflow, civil set, or survey package. That is normal. Pull the jurisdiction’s written checklist so you know what belongs on this sheet versus “see civil” or “see survey.”
Where Siteplanr fits: teams use it to tighten the parcel, setback, and buildable-area story early from an address, then carry that clarity into the drawing set. It does not draft your title block, driveway geometry, or utility runs—and it does not replace the plan checker’s word.
When in doubt, pull the jurisdiction’s “residential site plan checklist” or talk to your plan checker early. A fifteen-minute conversation often saves a week of redraws.
A practical workflow: from blank page to submittal-ready
1. Lock the basis of bearings and the parcel outline
Start from the best available geometry: a recent survey, assessor parcel GIS, or CAD file from a prior approved plan. Import that linework into your CAD or BIM environment and verify that closing dimensions make sense. If you are working from GIS alone, flag assumptions and confirm with survey when the project moves toward permit.
2. Build an accurate existing conditions layer
Trace what is on the ground today: house footprint, hardscape, significant grades if you are showing topo, and any structures you are keeping. This layer becomes your “before” snapshot and prevents accidental demolition of something you did not know was there.
3. Lay in proposed work as a separate layer
Keep proposed linework visually distinct (color, linetype, or a dedicated layer set). Reviewers should be able to toggle mentally between existing and proposed without deciphering cryptic hatch patterns.
4. Dimension the story the code cares about
Do not just draw pretty shapes; dimension the controlling relationships. That usually means building-to-line distances, separation between structures on the same lot, height-related notes if required, and any envelope or daylight planes if your jurisdiction uses them. If a dimension is code-critical, label it explicitly rather than forcing the checker to scale from the sheet.
5. Cross-check setbacks and zoning context early
Setbacks are where projects quietly drift off course. Zoning maps, overlays, and special districts can change the rules for front yards, side yards, rear yards, or street-specific setbacks. Running an address through a purpose-built lookup can surface constraints you might not see on a generic map layer. Siteplanr subscriptions are built for teams that want repeatable answers at the property line, not a one-off screenshot from a generic map.
6. Coordinate with civil, landscape, and structural as needed
For simpler additions, the site plan may live entirely in the architectural set. For grading-intensive work, stormwater, or fire access reviews, expect tie-ins to civil sheets. Make sure spot elevations, drainage patterns, and any fire department access paths do not contradict the architectural site plan.
7. Print-test and peer-review before you upload
Shrink the sheet to the size reviewers will print at. If labels disappear, bump text height or simplify linework. Have someone who did not draw the sheet trace the narrative in under two minutes. If they cannot, a plan checker will not either.
Common mistakes that delay permits
- Mixing up property lines with fence lines or hedge lines. Fences are not reliable boundary evidence.
- Omitting the ADU or garage when they are part of the compliance story. Every structure that counts toward FAR, lot coverage, or setbacks should appear.
- Using an unreadable scale on small lots. Switch to a larger scale or split into an enlarged key plan.
- Under-dimensioning rear and side yards. If you show a second story pop-out, dimension how it relates to setbacks at each level if required.
- Inconsistent north across sheets. Match the survey and the architectural set exactly.
How Siteplanr helps teams move faster
Siteplanr is designed for people who live in the gap between “I have a great design idea” and “I can prove it meets the rules for this address.” Instead of manually reconstructing setbacks from disconnected PDFs, you can start from the parcel context, compare alternatives, and carry that clarity into your CAD or permit package. Many teams pair those lookups with drawing sets and products that keep documentation consistent across projects.
Siteplanr does not replace a licensed survey or a jurisdiction’s official determination, but it does reduce the number of preventable surprises that make it onto a site plan in the first place.
Closing checklist before you submit
- Title block complete; sheet named “Site Plan” or per local convention.
- North arrow, scale, and match lines if multi-sheet.
- Existing versus proposed is obvious at a glance.
- All setback dimensions shown for every structure that triggers compliance.
- Easements and critical utilities shown or noted “see civil.”
- Peer review passed the two-minute trace test.
Whether you are sketching a backyard ADU or coordinating a full infill triplex, a disciplined site plan process keeps the project legible to reviewers and defensible to clients. Start from reliable linework, dimension the code story explicitly, and validate setbacks early. Your future self, the plan checker, and the homeowner will all thank you.