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Democratizing the ability to build.

Humanity's next frontier isn't another planet.
It's finishing this one.

The open platform for construction knowledge — explore, adapt, and share the projects that shape the built world.

Open building knowledge

Colemus is not a marketplace for static plans. It is shared infrastructure for building knowledge.

Explore open projects with full revision history.

Build together

Revision history for the built world.

Every plan gets history, contributors, issues, and a changelog.

History & revisions

Track every change from sketch to field modification.

Contributors & comments

Collaborate in the open — with attribution.

Issues & changelog

Surface problems and document releases.

The ecosystem

Explore → adapt → build → share back.

Static downloads stop when you download. Colemus compounds.

  1. 01

    Explore

    Find a project in the open knowledge base.

  2. 02

    Adapt

    Create a local variant for climate, codes, materials, and budget.

  3. 03

    Build

    Move from documented knowledge to site, with professional review when required.

  4. 04

    Share back

    Document field notes, open items, and release notes for the next builder.

Learn from others

Open construction knowledge, organized.

Browse by building type.

Homes

Single-family, ADU, and compact dwelling projects with revision history.

Build locally

Adapt knowledge to your context.

Adapt projects for climate, codes, materials, and budget.

Local codes

Track jurisdiction-specific notes, permit paths, and community-documented compliance discussions — not guaranteed approval.

Climate

Hot/dry, cold/humid, coastal, alpine — fork variants with documented envelope and structural adjustments.

Materials

Regional material swaps with open BOMs and supplier notes from builders who've been there.

Budget

Cost-scoped variants with community comments on value engineering and trade-offs.

AI-assisted adaptation is on the roadmap — never a substitute for professional review.

Professional layer

Professional when you need it.

Open knowledge stays open. Connect to licensed professionals when permits or stamps require it.

  • Engineered drawings
  • Stamped plans
  • BIM models
  • Engineering calculations
  • Inspection reports
  • Consultations

Why it matters

Building knowledge should compound.

Every great civilization built upon the knowledge of the one before it. Colemus exists to accelerate that process.

Affordable housing pressure demands reusable knowledge, not reinvented drawings.

Construction expertise is trapped in local silos. Colemus makes it findable, adaptable, and improvable.

Platform vision

Today and tomorrow.

Open projects today. Smarter adaptation and permitting connections next.

Current — MVP

  • Browse repositories
  • Share projects
  • View revisions
  • Track issues
  • Learn from open construction knowledge

Future platform

  • AI-assisted plan explanation
  • Code compliance guidance
  • Digital permitting
  • Budget-aware adaptation
  • Prefabrication workflows

Build civilization together.