A modern accessory dwelling unit in a landscaped backyard at golden hour

Residential design & delivery

Every home begins with what's possible.

Inspiring, low-carbon accessory dwelling units, designed on open-source construction technology -- from lot feasibility to a vetted contractor, in one platform.

A complete platform for designing and building homes, from feasibility to completion. Beginning with the ADU.

Talk to us See how it works

Feasibility and construction are two separate, disconnected searches

What's buildable and who builds it live in different places.

A homeowner who wants to build an ADU has to answer two hard questions separately: what can actually go on this lot, and who can be trusted to build it. Today those live in a zoning lookup here, a contractor referral there -- with no single record connecting what the lot allows to who's qualified to build it.

From your lot to a livable ADU

A flat placement fee, not a percentage-of-project cut.

A CSLB-verified contractor marketplace with real matching planned, not a lead-gen list -- unlike the percentage-of-project cut closed networks charge.

The beachhead is ADU.

What the lot allows resolves into who's qualified to build it, in one platform.

A market that's already opening up

California ADU permits are up sharply since 2016, with San Diego and LA County among the fastest-moving jurisdictions in the country. That growth isn't a bet Qullqa is making -- it's the direct result of recent state legislation (AB 68, AB 1033, AB 976, SB 1211, AB 1332, SB 9) that loosened permitting and ownership rules faster than most homeowners, or the software built for them, have caught up with.

Qullqa's bet is that the tooling hasn't kept pace with the policy -- homeowners can build an ADU today with far less friction than five years ago, but still have no single place to go from "what can I build here" to "who builds it."

ADU permits up sharply since 2016California HCD; UC Berkeley Terner Center for Housing Innovation

AB 68, AB 1033, AB 976, SB 1211, AB 1332, SB 9California YIMBY -- ADU legislative tracker

Who Qullqa is for

Homeowner

One place to go from "what can I build on this lot" to "who builds it," instead of two separate searches.

Contractor

Real matching against qualified, feasibility-scored leads, on a flat placement fee instead of a percentage-of-project cut.

Partner

A platform built on Ectropy's own decision-and-place foundation, extending to larger residential and light multi-family projects.

Pre-launch

Qullqa is pre-product: every feature above is at the planning stage, simplified for a single homeowner instead of a multi-party jobsite. If you're a homeowner exploring an ADU or a contractor interested in the network, we'd like to hear from you.

EctropyThe construction intelligence platform that binds each decision to its place, its cost, and its people.

Qullqa runs on Ectropy's platform foundation, focused for ADU and residential-scale execution.

SiltanaBuilding intelligence from design through occupancy and fifty years of operation.

The decision record a Qullqa project generates is intended to feed forward into Siltana -- 50-year building intelligence starting at the same pour a homeowner's ADU began at.

Get in touch

Reach out as a homeowner, a contractor, or a partner.