How to spot a teardown candidate from satellite imagery

A teardown candidate is a parcel where the improvement is worth less than the dirt it sits on. Satellite imagery can get you most of the way to a shortlist before you ever drive the block.

The trick is knowing what to look for, because "old" alone doesn't tell you much. Plenty of 1960s buildings are well-maintained, fully leased, and not going anywhere. What you're hunting for is a mismatch: a structure that's small relative to what the site could hold, in a location where the market has already moved past it.

What flags a teardown candidate from the air

Four things show up in imagery that correlate with low improvement value:

• Footprint-to-parcel ratio. Measure the building footprint against the lot line. A single-story structure sitting on a parcel that could carry three or four times that square footage, in an area zoned for more, is underbuilt.
• Parking that's bigger than the use justifies. A strip retail lot with enough asphalt for a holiday rush that never comes is burning land the owner isn't using.
• No visible investment over time. Pull imagery from several years back and compare it against the current pass. No reroofing, no additions, no parking restriping, just the same patched roof getting more patches. That's a building nobody's putting money into.
• What's going up around it. Cranes, new curb cuts, multifamily shells a block away. If the submarket is pricing up and the parcel in question hasn't changed in a decade, that gap is the opportunity.

None of these alone makes a case. A small footprint on an oversized lot next to a fresh mixed-use project, with no capital improvements showing up across your image history, is worth a second look.

Reading change history instead of a single snapshot

A single image tells you what's there today. Change history tells you whether anyone's bothered to maintain it. This is where imagery actually earns its keep for redevelopment candidate screening: you're not trying to appraise the building, you're trying to tell "actively used" apart from "sitting there."

An owner who's reroofed, expanded, or repaved in the last five years is probably not selling. An owner who hasn't touched the parcel while everything around it got built out might be, especially if the carrying costs on an underused lot have started to outpace the income it throws off.

Where imagery stops and real diligence starts

Imagery gets you footprint, coverage, parking extent, and a rough read on maintenance. It won't give you the actual improvement-to-land value split on the assessor's roll, the ownership structure, or whether there's a ground lease or deed restriction sitting on top of the parcel. Once a lot clears the imagery screen, you still pull the assessor record, check the zoning overlay, and find out who owns it and whether they'd talk.

What imagery saves you is the part before that: scrolling a parcel viewer block by block across a submarket, or driving streets looking for the one lot that's underused among forty that aren't. Done by hand, that's a real project, and it doesn't stay current unless someone redoes it every time the submarket shifts.

That manual pass is exactly what a ranked parcel list built from imagery and change history is meant to replace: instead of starting from a blank parcel map every time you open a new submarket, you start from the handful of lots worth a phone call.

If you're about to screen a submarket for teardown candidates, start from that list instead of a blank map.