Measure your property from your couch. See satellite imagery of any U.S. address and trace the visible boundaries. Square footage is calculated as you go.
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Yes, with satellite imagery plus a tracing tool. Modern satellite views are sharp enough to distinguish a lawn from a driveway from a garden bed, so if you can identify your boundaries visually, you can measure them. Free options exist; LotSite is one. Enter an address and trace on the imagery, no signup.
Set expectations honestly: online measurement is good for planning, not for legal disputes. A careful trace lands within a few percent of a physical measurement. Exactly what you need for fertilizer, fencing quotes, and materials, and far better than guessing when you can't physically walk the property (a listing three states away, say). When the stakes are legal, boundary disputes, construction permits, a licensed survey is the only answer. For every offline method too, see how to measure your property.
The whole thing takes a few minutes. Start above, open the measurement tool directly, or see the measure my lot walkthrough for the lot-specific version.
1. Zoom in as far as you can. Precision comes from tracing at high zoom. Measure one section at a time rather than the whole lot from far out. 2. Anchor on visible landmarks. Corners of the house, driveway seams, and fence posts give you fixed reference points to trace from.
3. Match multiple boundary features. If the fence, the mowing line, and the hedge all agree, you've probably found the boundary; if they disagree, be conservative. 4. Cross-check with assessor data. Your county's recorded lot size is a free sanity check. If your trace is way off from it, retrace.
5. Escalate when it matters. For fences on the line, additions, or anything a neighbor might contest, follow your online measurement with a professional survey. Online numbers are for planning, surveys are for the law.
Beyond the checklist, it helps to learn to read the imagery itself. Tree canopy is the biggest obstruction. A mature oak can hide fifty feet of fence line. Trace the fence where it emerges on either side of the canopy and connect the segments, and use shadows to tell features apart: a fence casts a thin, straight shadow, while a hedge casts a soft, broken one.
Watch for camera angle on tall structures. Satellite photos are rarely taken from straight overhead, so rooflines can appear shifted a few feet from the foundations beneath them. When precision matters, trace ground-level features, driveway edges, walkways, fence lines, rather than roof edges, which lean with the camera angle.
Calibrate with a known dimension. Standard features make good rulers: a two-car driveway runs about 18–20 feet wide, a parking space about 9, a sidewalk square about 5. If something of known size measures wildly different in your trace, you're zoomed out too far or tracing the wrong edge. Fix that before trusting the lot total.
Enter your address, trace what you see, and get square footage in minutes. Free.
Free. No signup. Works nationwide. Or open the measurement tool directly.