Site Plan vs. Property Survey: What's the Difference?

A **site plan vs survey** question comes up on almost every homeowner project, and the two get confused constantly. They look similar at a glance, but they're produced by different people, priced an order of magnitude apart, and used for different purposes. Here's what each document is, what it costs in 2026, and how to decide which one your project actually needs.

## What a site plan actually is

A site plan is a scaled overhead drawing of your lot. It shows the property boundary, existing structures, driveways, landscaping, easements, setbacks, and anything you're proposing to add or change. It's drawn from publicly available data — parcel records, aerial imagery, county GIS layers, and the Assessor's Parcel Number (APN) — not from a surveyor's field measurements.

Site plans are used for design, feasibility, HOA approvals, contractor bids, and the first round of most permit applications. They're a planning document, not a legal one. They show where county records say your property line is — usually close enough for early-stage work, but not for resolving disputes.

## What a property survey actually is

A property survey (sometimes called a boundary survey or land survey) is a legal field measurement performed by a state-licensed surveyor. The surveyor visits the property, locates monuments, takes precise measurements with GPS and total stations, and produces a stamped, sealed plat that legally establishes where your boundaries are.

A survey is a legal instrument. It can be recorded with the county, referenced by title insurance, and used in disputes. If you ever go to court over a fence, easement, or encroachment, the survey is the document the court looks at.

## Cost, timeline, and accuracy

The gap between the two is significant. A traditional site plan drawn by a draftsperson typically runs $200–$800 and takes a few days. An AI site plan generated from an address and APN — the kind InQI produces — costs a fraction of that and comes back in under a minute. A property survey runs $500–$2,500 for a standard residential lot and takes one to four weeks. Larger parcels, wooded sites, or lots with missing monuments push that higher.

Accuracy works differently for each. Site plan accuracy depends on the underlying GIS and imagery — good for layout, setbacks, and proposed structures, but not legally certified. Survey accuracy is field-verified down to fractions of an inch and is admissible in court.

## When to use each — and when you need both

For most early-stage work — concept design, ADU feasibility, deck or pool layout, HOA submittals, and the first pass of many permit applications — a site plan is the right tool.

You'll need a property survey when boundaries are unclear or in dispute, when you're building near a property line and a setback variance is on the table, when a lender or title company requires one, or when your local building department specifically asks for stamped survey data. Requirements vary by jurisdiction — some counties accept an AI-generated site plan with parcel data; others require a stamped survey for anything structural. Always check with your local building department before assuming either document is enough.

It's common to use both: a site plan for design and early permitting, and a survey later if the project scales up or the jurisdiction demands it. The good news is that the planning-side document is now closer to free than to $800 thanks to AI tools like [InQI's site plan generator](https://www.inqi.ai/generativesiteplan) — so getting the site plan first and only commissioning a survey if you actually need one is a much cheaper starting point than it used to be.

## FAQ

**Can I use a site plan instead of a survey for my building permit?**

Sometimes. Many residential permits — fences, sheds, small ADUs, decks, pools — accept a scaled site plan generated from parcel data. Larger projects, projects near property lines, or jurisdictions with strict requirements may demand a stamped survey. Check with your local building department before submitting.

**Is an AI site plan as accurate as a survey?**

No, and that's not what it's for. An AI site plan is accurate against county parcel records and aerial imagery — fine for design, layout, and most early-stage permits. A survey is field-measured and legally certified. They solve different problems.

**How much does a site plan cost compared to a survey in 2026?**

A site plan is typically $0–$800 depending on the method. A residential property survey is typically $500–$2,500. AI-generated site plans from an address and APN cost dramatically less than either traditional option. See our [pricing plans](https://www.inqi.ai/pricing-plans) for current rates.

**Do I need a survey to sell my house?**

Not always, but title companies and lenders often request one — especially for new construction, recent additions, or properties where the existing survey is older than a decade.

**Does a site plan show easements and setbacks?**

Yes. A site plan should show recorded easements pulled from parcel data, plus zoning setbacks for the lot. InQI's [AI site plan generator](https://www.inqi.ai/generativesiteplan) overlays setbacks automatically based on the property's zoning district.

**Who can produce each document?**

A site plan can be produced by an architect, designer, draftsperson, builder, or AI tool. A property survey can only be produced and stamped by a state-licensed land surveyor.

## Get a scaled site plan from your address in minutes

If your project needs a site plan — not a survey — InQI generates a scaled, editable site plan from a property address and Assessor's Parcel Number (APN) in under a minute. Setbacks, easements, and zoning overlays are pulled automatically. Sign up for free to try it on your own property.

[Sign up for free →](https://www.inqi.app/register/)