Open ADU  simplifying how you ADU 

ADU and House fit, plan and design tools

 Our LotTech, briefing  and ADU / house design systems are designed to help you test, plan and design your ADU or new house  easily.

LotTech our fast lot analysis tool, is now available.

DesignTech our online design system for new houses and ADUs (beta).

Homeowners | ADU/ builders | ADU positive cities

Focussed on new ADU or single family home projects, Opoplan’s smart tools save time and money from lot selection and testing through briefing,  design and generating plans on any new home project.

Our new services for ADU positive municipalities are under development-become a beta partner city

DesignTech

Our design service that creates your custom designed plan in 3D online in just a few minutes
beta

PlanTech

Generate full plan sets, drawings and takeoffs of your design plan for download in PDF
Concierge

ADU City

Services for ADU positive cities - city to lot scale feasibility & fit analysis - approved ADU designs, ADU support web interfaces
municipalities
Our mission

Simplifying how you ADU

Whether you’re a homeowner trying to build a new ADU, an ADU manufacturer or a local builder that provides ADUs or a city promoting ADUs as a housing solution, Open ADU by Opoplan is for you 

Welcome to the new way of creating ADUs

Open ADU

Opoplan house planning and design tools featuring LotTech - fast lot analysis tool

Reviews

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.”
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We want to know what you think of our tools. Send us your questions, comments and suggestions to help us make our tools work better for you and your business.