tools to help you on your ADU and new house journey

Open ADU compatible


See if your lot is suitable for an ADU quickly here

LotTech is an easy-to-use online, lot analysis tool that

Using LotTech™

This short video shows LotTech in action on two vacant lots listed for sale on Zillow.

See how easy it is to use this tool and the visual presentation of the lot data.

Use an address or GPS coordinates to find your lot. Alternatively, start with a city or street and scroll around the map to identify your lot.

For some lots, where an address is not yet available, you can drop a pin on the map or satellite view and draw your boundary lines. Lines can be adjusted manually until you have the right size and shape lot. You can also use a nearby landmark to help identify the lot you want to test.

Once your lot boundary lines are set, the lot test should be completed in around 30 seconds. In some more complicated settings, it may take a minute or two to complete.

LotTech shows you:

  • Lot size
  • Boundary line measurments 
  • Setbacks
  • Buildable area
  • Existing building footprints
  • Slope
  • Footprint overlays for houses, garages and ADUs

Boundary lines are easily adjusted with a click and drag function.

The front of the lot is pre-determined but can be changed from the setbacks function/screen.

Setback square footage at the front, back and sides can be changed based on local zoning requiremets. This is particularly useful when considering an ADU project.

Ideal for an ADU project, it is now possible to view the footprint/shape of an existing building on a lot. 

This function can be toggled on and off on each of the lot analysis screens – buildable area, slope, and most importantly when new house, garage or ADU footprints are being added.

Generic footprints are pre-loaded into LotTech for houses ranging in size from 750 sq ft to 4,000 sq ft, garages and ADUs ranging from 350 sq ft to 750 sq ft.  On some small or narrow lots, the garage / ADU footprints can be used to demonstrate lot fit and coverage.

Custom footprints can be uploaded into LotTech giving users a unique opportunity to view their own building footprints on any single family lot across the US.

Opoplan is currently working on 3 new features for LotTech:

  1. Utilities – is the lot connected to city grid, water and sewers or are utilities nearby
  2. Hazards – is this lot at risk or fire, flood or storm damage
  3. Setion – cross section view with soil conditions


If you have an opinion on what feature should be next, feel free to tell us in the suggestion box at the bottom of this page.

Why LotTech™

Manage new enquiries quickly and decisively from your office or on the go.

Check lot for existing buildings and adjust boundaries for a new house or ADU.

Eliminate the need for time consuming lot visits until you know you have the build contract.

Fast lot data

Including size, setbacks, buildable area and slope

House footprint fit

Overlay house footprints from 750 – 4000 sq ft – plus garages and ADUs

Easy to use

Drop a pin on the map – no training or onboarding required 


Here’s what frequent LotTech users have to say about it… 

CJ RicoDeveloper, California
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“This is a really great, unique tool and I’ve not seen anything else like it. I’d be willing to pay $150 per use once the utilities are added”.
Tom ByrneChadworth Homes, Maryland
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"Using LotTech saves me at least an hour every time I get a new enquiry, not to mention the savings on gas".
Becki SchwanzSchwanz Custom Homes, Wisconsin
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“Overall a handy tool that I would say is user friendly … that information I can share with a homeowner has real value to me. I can build LotTech cost into my pre-construction charges.”


LotTech is an affordable way to save time and money when you want quick lot test results with no hassle.

Check and adjust the boundary lines before clicking ‘Test Lot’, then check and adjust setbacks. 

If you want to add your own custom footprints for houses or ADUs, contact us for more details.

Free Trial

$ 0 try LotTech for free
  • Size
  • Setbacks
  • Slope
  • Buildable Area
  • House Footprint Fit
  • Save and Reuse


$ 30 per lot test
  • Size
  • Setbacks
  • Slope
  • Buildable Area
  • House Footprint Fit
  • Save and Re-use
  • Export and Share

Custom Footprints

$ 150* *from $150 per month
  • Size
  • Setbacks
  • Slope
  • Buildable Area
  • Custom Footprints
  • Save and Re-use
  • Export and Share

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